Mess- und Ortungstechnik Measuring and Locating Technologies Leitungsortung Line Locating Rohrleitungsnetze Water Networks Kommunikationsnetze Communication Networks Elektrizitätsnetze Power Networks Operating manual Ultrasound flow measuring device UDM 200 Issue: 1 (05/2008)
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Mess- und Ortungstechnik Measuring and Locating Technologies
Leitungsortung Line Locating
Rohrleitungsnetze Water Networks
Kommunikationsnetze Communication Networks
Elektrizitätsnetze Power Networks
Operating manual
Ultrasound flow measuring device UDM 200
Issue: 1 (05/2008)
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Consultation with SebaKMT The present system manual has been designed as an operating guide and for reference. It is meant to answer your questions and solve your problems in as fast and easy a way as possible. Please start with referring to this manual should any trouble occur. In doing so, make use of the table of contents and read the relevant paragraph with great attention. Furthermore, check all terminals and connections of the instruments involved. Should any question remain unanswered, please contact:
Seba Dynatronic Mess- und Ortungstechnik GmbH
Hagenuk KMT Kabelmesstechnik GmbH
Dr.-Herbert-Iann-Str. 6 D - 96148 Baunach Phone: +49 / 9544 / 68 – 0 Fax: +49 / 9544 / 22 73
Röderaue 41 D - 01471 Radeburg / Dresden Phone: +49 / 35208 / 84 – 0 Fax: +49 / 35208 / 84 249
E-Mail: [email protected] http://www.sebakmt.com
SebaKMT
All rights reserved. No part of this handbook may be copied by photographic or other means unless SebaKMT have before-hand declared their consent in writing. The content of this handbook is subject to change without notice. SebaKMT cannot be made liable for technical or printing errors or shortcomings of this handbook. SebaKMT also disclaim all responsibility for damage resulting directly or indirectly from the delivery, supply, or use of this matter.
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Terms of Warranty
SebaKMT accept responsibility for a claim under warranty brought forward by a customer for a product sold by SebaKMT under the terms stated below. SebaKMT warrant that at the time of delivery SebaKMT products are free from manufacturing or material defects which might considerably reduce their value or usability. This warranty does not apply to faults in the software supplied. During the period of warranty, SebaKMT agree to repair faulty parts or replace them with new parts or parts as new (with the same usability and life as new parts) according to their choice. SebaKMT reject all further claims under warranty, in particular those from consequential damage. Each component and product replaced in accordance with this warranty becomes the property of SebaKMT. All warranty claims versus SebaKMT are hereby limited to a period of 12 months from the date of delivery. Each component supplied by SebaKMT within the context of warranty will also be covered by this warranty for the remaining period of time but for 90 days at least. Each measure to remedy a claim under warranty shall exclusively be carried out by SebaKMT or an authorized service station. To register a claim under the provisions of this warranty, the customer has to complain about the defect, in case of an immediately detectable fault within 10 days from the date of delivery. This warranty does not apply to any fault or damage caused by exposing a product to conditions not in accordance with this specification, by storing, transporting, or using it improperly, or having it serviced or installed by a workshop not authorized by SebaKMT. All responsibility is disclaimed for damage due to wear, will of God, or connection to foreign components. For damage resulting from a violation of their duty to repair or re-supply items, SebaKMT can be made liable only in case of severe negligence or intention. Any liability for slight negligence is disclaimed.
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Contents
1 General Details.................................... ................................................................9
2 Quickstart ......................................... .................................................................10
3 Applications ....................................... ...............................................................13
4 Measuring Principle................................ ..........................................................13
5 Handling of UDM 200................................ ........................................................14
5.1 Control Panel and Handling..........................................................................................14 5.2 Display ..........................................................................................................................15 5.3 Plugs.............................................................................................................................15 5.4 Sensors.........................................................................................................................15 5.5 Battery Indicator............................................................................................................15 5.6 Charging the Battery .....................................................................................................16 5.7 Battery Care..................................................................................................................16 5.8 Cleaning........................................................................................................................16 5.9 Maintenance .................................................................................................................16
6 Menu Structure Overview............................ .....................................................17
7 General Measuring Process.......................... ...................................................19
7.1 Selection of the Measuring Point ..................................................................................19 7.2 Acoustic Penetration.....................................................................................................19 7.3 Undisturbed Flow Profile...............................................................................................20 7.4 Measuring Points to be Avoided ...................................................................................22 7.5 Input of the Pipe Parameters / Menu PAR....................................................................23
7.5.1 Outer Pipe Diameter / Pipe Circumference ..................................................................... 23 7.5.2 Pipe Wall Thickness ........................................................................................................ 23 7.5.3 Pipe Material .................................................................................................................... 24 7.5.4 Pipe Lining ....................................................................................................................... 25 7.5.5 Pipe Roughness .............................................................................................................. 25
7.6 Input of the Medium Parameters...................................................................................26 7.6.1 Sound Velocity ................................................................................................................. 26 7.6.2 Kinematic Viscosity.......................................................................................................... 26 7.6.3 Density ............................................................................................................................. 27 7.6.4 Medium Temperature ...................................................................................................... 27 7.6.5 Cable Length.................................................................................................................... 27
7.7 Realize Measurement / Menu MEA ..............................................................................28 7.7.1 Assign a Number to Measuring Point .............................................................................. 28 7.7.2 Define Number of Sound Paths....................................................................................... 29
7.8 Mounting and Positioning the Transducer ....................................................................30 7.8.1 Transducer Distance........................................................................................................ 30 7.8.2 Mounting the Transducers ............................................................................................... 31 7.8.3 Mounting the transducers with transducer shoes and chains ......................................... 31 7.8.4 Lengthening the Fastening Chain.................................................................................... 32
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7.8.5 Fine Adjustment of the Transducer Distance .................................................................. 32 7.8.6 Start of Measurement ...................................................................................................... 33
7.9 Recognition of Flow Direction .......................................................................................33 7.10 Stopping of Measurement......................................................................................33
8 Displaying the Measured Values / Menu OPT .......... ......................................34
8.1 Selection of the Physical Quantity and of the Unit of Measurement ...........................34 8.2 Display Setting..............................................................................................................35 8.3 Transducer Distance.....................................................................................................35 8.4 Storage and Output of Measured Data .........................................................................36
8.4.1 Storing Measured Data.................................................................................................... 36 8.4.2 Output to a PC via Serial Interface .................................................................................. 37 8.4.3 Measured Data Memory during Measurement ................................................................ 37 8.4.4 Offline Output of Measured Values ................................................................................. 37 8.4.5 Saving the Counter .......................................................................................................... 38 8.4.6 Storing the Signal Amplitude ........................................................................................... 38 8.4.7 Storing the Sound Velocity of the Medium ...................................................................... 38
9 Advanced Measuring Functions....................... ...............................................39
9.1 Command Execution during Measurement...................................................................39 9.2 Damping Factor ............................................................................................................39 9.3 Totalizers ......................................................................................................................40
9.3.1 Store the Totalizer Value ................................................................................................. 40 9.3.2 Overflow of the Totalizers ................................................................................................ 40
9.4 Upper Limit of the Flow Velocity ...................................................................................41 9.5 Cut-off Flow...................................................................................................................41 9.6 Uncorrected Flow Velocity ............................................................................................42 9.7 Change of Limit for the Inner Pipe Diameter.................................................................43 9.8 Protection code for unwanted interruption ....................................................................43
9.8.1 Intervention in the Measurement ..................................................................................... 44 9.8.2 Deactivation of a Program Code...................................................................................... 44
9.9 Measuring the Sound Velocity of the Medium ..............................................................45 9.9.1 Displayed Information ...................................................................................................... 46
10 Output ............................................. ...................................................................47
10.1 Activation ...............................................................................................................47 10.1.1 Output Range................................................................................................................... 48 10.1.2 Error Output ..................................................................................................................... 49 10.1.3 Function Test ................................................................................................................... 50
10.2 Error Value Delay...................................................................................................51 10.3 Activation of an Analog Output ..............................................................................52
10.3.1 Measuring Range of the Analog Outputs ........................................................................ 52 10.4 Activation of a Pulse Output...................................................................................53 10.5 Activation of an Alarm Output ................................................................................53
10.5.1 Alarm Properties .............................................................................................................. 54 10.5.2 Setting the Limits ............................................................................................................. 55 10.5.3 Defining the Hysteresis.................................................................................................... 56
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10.6 Behaviour of the Alarm Outputs.............................................................................56 10.6.1 Apparent Switching Delay................................................................................................ 56 10.6.2 Reset and Initialization of the Alarms .............................................................................. 56 10.6.3 Storage of Alarm Outputs ................................................................................................ 56 10.6.4 Alarm Outputs during Transducer Positioning................................................................. 56 10.6.5 Alarm Outputs during Measurement................................................................................ 57 10.6.6 Alarm State Indication...................................................................................................... 58
10.7 Deactivation of the Outputs....................................................................................58
11 Settings and Special Functions/ Menu SF............ ..........................................59
11.1 Language Change (HotCode)................................................................................59 11.2 Time and Date .......................................................................................................60 11.3 Dialoges and Menus ..............................................................................................61
11.3.1 Pipe Circumference ......................................................................................................... 61 11.3.2 Measuring Point Number Indication ................................................................................ 62 11.3.3 Display of the lastly entered Transducer Distance .......................................................... 62 11.3.4 Error Value Delay ............................................................................................................ 62 11.3.5 Alarm State Indication...................................................................................................... 62
11.4 Measurement Settings ...........................................................................................63 11.5 Configuring Serial Data Transfer ...........................................................................64 11.6 Contrast .................................................................................................................64 11.7 Instrument Information ...........................................................................................64 11.8 Printing Measured Values......................................................................................65 11.9 Deleting Measured Values.....................................................................................65
12 SuperUser Mode ..................................... ..........................................................66
12.1 Activating/Deactivating...........................................................................................66 12.2 Malfunctions in SuperUser Mode...........................................................................66
13 Libraries.......................................... ...................................................................67
13.1 Editing the Selection Lists......................................................................................67 13.1.1 Displaying a Selection List............................................................................................... 68 13.1.2 Adding a Material or Medium to the List .......................................................................... 68 13.1.3 Removing a Material or Medium from the List................................................................. 69 13.1.4 Removing all Materials or Media from the List ................................................................ 69 13.1.5 Adding all Materials or Media to the List.......................................................................... 69
13.2 Defining New Materials or Media ...........................................................................70 13.2.1 Partitioning the User Memory .......................................................................................... 70 13.2.2 Extended Library Function............................................................................................... 72 13.2.3 Entering Material or Medium Properties without Using the Extended Library................ 73 13.2.4 Entering Material Properties Using the Extended Library ............................................... 74 13.2.5 Entering Medium Properties Using the Extended Library ............................................... 76 13.2.6 Deleting a User-Defined Material or Medium .................................................................. 77
14 PC Software........................................ ...............................................................78
14.1 Symbols in the Menu Bar.......................................................................................78 14.2 Connecting to the UDM 200...................................................................................79 14.3 Downloading Data..................................................................................................80
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14.4 Changing the Software Language .........................................................................82 14.5 Additional Software Options...................................................................................82
15 Troubleshooting .................................... ...........................................................83
15.1 Problems with the Measurement ...........................................................................84 15.2 Correct Selection of the Measuring Point ..............................................................85 15.3 Maximum Acoustic Contact ...................................................................................85 15.4 Application Specific Problems................................................................................86 15.5 High Measuring Deviations ....................................................................................86 15.6 Problems with the Totalizers..................................................................................87
16 Technical Data ..................................... .............................................................88
17 Appendix ........................................... ................................................................89
17.1 Serial Output Format..............................................................................................89 17.2 Hyperterminal Transfer Parameters.......................................................................90 17.3 Sound Velocity of Selected Pipe and Lining Materials at 20 °C.............................90 17.4 Typical Roughness Coefficients of Pipes...............................................................91 17.5 Properties of Water at 1 bar and at Saturation Pressure .......................................92
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1 General Details The UDM 200 is a high precision measuring tool. Please handle with care. To assure a long life please pay attention to the following points:
- Read this manual completely and follow all the details. - Prevent the UDM 200 from crushes and tumbles. - Keep the transducers clean. - Don’t bend or squeeze the cables of the transducers. - Don’t expose the cabels to great heat. - Don’t use damaged cables. - Pay attention to the units degree of protection. - Not at all open the unit on your own authority. - Connect the battery recharger correctly.
This manual is written for the user of the UDM 200. It contains important information about this unit. Therefore please read the manual and keep it carefully. Despite of all care there may be mistakes in it. Please advise us of such failures. The UDM 200 is subject to continuous improvement. Therefore there may be certain variations between the manual and the unit. If you have any question, please contact SebaKMT. We reserve to accomplish technical changes without preceding information.
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2 Quickstart You should have the following data down pat, before you begin: Pipe data:
- Outer diameter or pipe circumference - Wall thickness (make use of tables of the producer or use a thickness gauge on site) - Material - Surface condition of the pipe (lining, roughness) - Approximate temperature of the medium
By the help of keys and you change the values of the menus. Complete every single action by pressing ENTER. Set up parameters
Activate UDM 200.
Press the keys till PAR is marked in the Display. Press ENTER.
Enter the following values below.. Manage the input with keys:
Outer diameter [mm]
Wall thickness [mm] (make use of tables of the producer or use a thickness gauge on site)
Material: set the preferred material by the use of key .
If there is a lining, its material, condition and thickness have to be entered, too. Therefore please read this manual carefully. When there is no lining choose “no” and continue by pressing the “Enter”-key
Roughness of the pipe. Choose the roughness from the table in the Annex
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Medium: water
Approximate temperature of the medium.
Additional cable. Leave this value on 0.0m.
Measuring
Select MEA by the help of the arrow keys and press ENTER.
OPTIONAL: Enter measuring points: enter any comment by the help of the arrow keys.
Set sound path: Please leave the proposed value, if possible!!!
Transducer distance: Set the distance of the transducers on the straight edge. Set the transducers on the pipe and fix them, using their clamping chains. There has to be enough couplant gel on the transducers. There must not be air between transducers and pipe.
UDM 200 displays the intensity of the transmitted signal. Please see that the signal is stable!
Confirm once more the transducer distance.
UDM 200 starts measurement.
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During measurement By pressing the keys further values can be displayed:
Total volume and present flow
Reflow and present reflow
Free memory of the unit
Mode: Transient Time
Distance between the transducers set at the moment
S1, Q1 c R F
Quit measurement
Adjust transducers
Clear totalized volume
Flow velocity
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3 Applications This UDM 200 can be used wherever both the pipe wall and the medium to be measured are sound-permeable. This applies to pipe walls made of homogeneous material and to media with a low solid or gas content. Because ultrasonic waves can also penetrate solids, the sensors can be fixed to the outside of the pipe, which means the measurement requires no intervention. The measurements are independent of the electrical parameters of the medium such as conductivity and the dielectric constant.
4 Measuring Principle The UDM uses ultrasonic signals for the flow measurement of a medium, employing the so-called transit time method. Because the medium in which the signals propagate is flowing, the transit time of the sound signals propagating in the direction of flow is shorter than the transit time of the signal propagating against the direction of flow. The transit-time difference �t is measured and allows the determination of the average flow velocity on the propagation path of the ultrasonic signals. A flow profile correction is then performed in order to obtain the area average of the flow velocity, which is proportional to the volume flow.
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5 Handling of UDM 200
5.1 Control Panel and Handling Use the several keys to navigate through the menus of UDM 200.
General functions
BREAK: Deletes the selection or change and returns to main menu.
RESET: Press these three keys at the same Time to resolve a malfunction. This reset equals a restart of the unit. Stored data are not affected.
INIT (cold start): Press these both keys during turn-on procedure to initialize UDM 200 new. Most of the parameters and settings are reset to factory defaults. Memory contents are not affected.
ENTER: Confirms the selection or the input.
Horizontal selection
Selects the nearest point on the right.
Selects the nearest point on the left.
Vertical selection
Scrolls forwards.
Scrolls backwards.
Input of figures and values
Moves the Cursor to the right.
Scrolls through the symbol set.
Move the cursor to the left. If the cursor is situated on the left side: - an even treated value will be reset to the previously stored value - a not treated value will be deleted. There is an error message, if the entered value is invalid. Press any key and enter a correct value.
Input of text
Moves the cursor to the right.
Scrolls to the next symbol within the symbol set.
Resets all symbols to the last entry.
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5.2 Display UMD 200 is equipped by a display, on which settings and measured values can be seen.
5.3 Plugs
5.4 Sensors The sensors are engraved on the top. The sensors are correctly installed when the engraved markings on both sensors together form an arrow. The sensor cables then point in opposite directions. The arrow allows you to later determine the flow direction in connection with the displayed measured value.
5.5 Battery Indicator When the backlighting is switched off, the charge level of the battery is not shown.
Press the button (On/Off) once, to switch on the backlighting and the battery indicator.
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5.6 Charging the Battery The UDM 200 has a state-of-the-art lithium-ion battery. To charge the UDM 200, use the charger unit supplied. Switch on the device. The green LED with the power symbol flashes to indicate that the device is being charged. The green LED lights up constantly when the device is fully charged.
5.7 Battery Care The UDM 200 has state-of-the-art lithium-ion batteries. This type of battery does not suffer from the “memory effect”. Over time, however, frequent charging of only partially discharged batteries can lead to the battery power not being correctly indicated. To synchronise this, completely discharge the battery (by simply switching the device to test mode) and then charge it again. Perform this action at least twice. Afterwards, the charge level should be correctly indicated.
5.8 Cleaning Use a soft cloth to clean the device. Do not use cleaning agents. Wipe off any residue of contact paste using a soft paper tissue.
5.9 Maintenance No maintenance is required. Always observe the instructions and precautions in the manual. If the UDM 200 is correctly installed at a suitable location in accordance with the recommendations in this manual, properly used and taken care of, no malfunctions are to be expected.
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6 Menu Structure Overview Menu overview
Level 1 Level 2 Level 3 Level 4 /settings Section PAR: Parameter Pipe and medium settings 7.5 Outer diameter 7.5.1 Wall thickness 7.5.2 Pipe material Material selection 7.5.3 Other material c-Material
(see addition) 7.5.3
Lining Lining material: 7.5.4 Thickness of lining 7.5.4 Roughness 7.5.5 Medium Water 7.6 Sea water Other medium c-Medium min 7.6.1 c-Medium max Kin. viscosity 7.6.2 Density 7.6.3 Medium temperature 7.6.4 Add. Cable 7.6.5 MEA: Measurement Steps along measuring operation 7.7 Measuring point Nr. 7.7.1 Way of sound 7.7.2 Transducer distance 7.8.5 OPT: Output options Setting of all relevant output options (measuring quantity,
measuring unit, etc.) 8
Measuring quantity Volume flow Volume in: [select measuring unit]
8.1
Flow velocity Velocity in: [select measuring unit]
8.1
Mass flow Mass in: [select measuring unit]
8.1
Sound velocity 8.1 Damping 9.2 Store measuring data
No/Yes 8.4.1
Serial output No/Yes Storage rate Extra: [selection in seconds]
8.4.2
Every second Every 10 seconds Every minute Every 10 minutes Every 30 minutes Every hour Current loop No/Yes Measuring quantities Absolut/Sign 10.3 Measuring range:
begin
Measuring range: end
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Alarm output No/Yes R1=Funk Select function 10.5 R1= Type Hold Non-Hold R1= Mode NC CONT NO CONT Limits SF: Special Functions Functions, that are not directly related to measurement System settings Set clock 11.2 Libraries Material list 13 Media list 13 Format User-Area 13 Extended library 13 Dialogs/Menus Pipe circumference 11.3 Measuring point 11.3.2 Transducer
distance 11.3.3
Error-val. Delay 11.3.4 Schow relais stat. 11.3.5 Measurement Compare c-Fluid Flow velocity. 9.4 Cut-off flow 9.5 Velocity Limit 9.4 Quant. Wrapping 9.3.2 Quantitiy recall 9.3.1 Process outputs Install Output 10 Storage Ringbuffer 8.4 Storage mode 8.4.1 Storing measured
data 0
Store Amplitude 8.4.6 Store c-Medium 8.4.7 Serial transmission Kill Spaces 11.5 Decimalpoint Col-Separat. Miscellaneus Input HotCode
(change language) 11.1
Contrast 11.6 Unit-Info 11.7 Print 11.8 Delete measuring
quantities 11.9
Programming-Code 9.8 Install. Material 13 Install. Medium 13
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7 General Measuring Process
7.1 Selection of the Measuring Point The correct selection of the measuring point is crucial for achieving reliable measurement results and a high accuracy. A measurement must take place on a pipe
• where the sound can propagate and
• where a fully developed rotationally symmetrical flow profile exists.
The correct transducer positioning is an essential condition for error-free measurement. It guarantees that the sound signal will be received under optimum conditions and evaluated correctly.
Because of the variety of applications and the different factors influencing the measurement, there can be no standard solution for the transducer positioning. The correct position of the transducers will be influenced by the following factors:
• diameter, material, lining, wall thickness and form of the pipe
• medium
• presence of gas bubbles in the medium
Avoid measuring points in the vicinity of deformations and defects of the pipe and in the vicinity of weldings.
Avoid locations where deposits are building in the pipe. Make sure that the ambient temperature at the selected location is within the operating temperature range of the transducers (see annex Technical Data).
7.2 Acoustic Penetration It must be possible to penetrate the pipe with acoustic signals at the measuring point. The acoustic penetration is reached when pipe and medium do not attenuate the sound signal so strongly that it is completely absorbed before reaching the second transducer. The attenuation of pipe and medium depends on:
• kinematic viscosity of the medium
• proportion of gas bubbles and solids in the medium
• deposits on the inner pipe wall
• pipe material
The following conditions have to be respected at the measuring point:
• the pipe is always filled completely
• no solid deposits are building
• no bubbles accumulate (even bubble-free media can form gas pockets when the medium expands, e.g. before pumps and after great cross-section extensions)
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7.3 Undisturbed Flow Profile Many flow elements (elbows, slide valves, valves, control valves, pumps, reducers, diffusers, etc.) cause a distortion of the flow profile. The axisymmetrical flow profile needed for correct measurement is no longer given. A careful selection of the measuring point helps to reduce the impact of disturbance sources. It is most important that the measuring point is chosen at a su fficient distance from any disturbance source. Only then it can be assumed that the flow profile in the pipe is fully developed. However, UDM-200 will give you significant measuring results even under non-ideal measuring conditions if: • e.g. a medium contains a certain proportion of gas bubbles or solids or
• the recommended distances to disturbance sources can not be observed for practical reasons.
Recommended straight inlet and outlet pipe lengths are given for different types of flow disturbance sources in the examples in the table below.
Correct selection of a measuring point:
Disturbance source: 90°-bend Inlet Outlet L ≥ 10 D L ≥ 5 D
Disturbance source: 2 x 90°- bend on the same level Inlet Outlet L ≥ 25 D L ≥ 5 D
Disturbance source: 2 x 90°- bend on various levels Inlet Outlet L ≥ 40 D L ≥ 5 D
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Disturbance source: T-fitting Inlet Outlet L ≥ 50 D L ≥ 10 D
Disturbance source: Widening Inlet Outlet L ≥ 30 D L ≥ 5 D
Disturbance source: Constriction Inlet Outlet L ≥ 10 D L ≥ 5 D
Disturbance source: Valve Inlet Outlet L ≥ 40 D L ≥ 10 D
Disturbance source: Pump Inlet L ≥ 50 D
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7.4 Measuring Points to be Avoided Try to avoid the following measuring points:
• near deformed or damaged pipe sections
• near welding seams
• where deposits are bonded within the pipe
Observe the instructions contained in the following table:
Horizontal pipeline: Select a measuring point where the transducers can be mounted on the side of the pipe, so that the sound waves propagate horizontally in the pipe. Thus, solids deposited on the bottom of the pipe and the gas pockets developing at the top will not influence the propagation of the signal.
right wrong
Free In- or Outlet: Locate the measuring point, where the pipe cannot drain.
right unfavourable
right unfavourable
Vertical pipeline: Locate the measuring point, where fluid rises. The pipe has to be completely filled.
right wrong
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7.5 Input of the Pipe Parameters / Menu PAR After the measuring point has been selected, the pipe and medium parameters can be entered. The ranges are limited by the characteristics of the transducers and of the flowmeter. An error message will be displayed if the limits are exceeded (MINIMUM and MAXIMUM plausibility check).
Note: The parameters will be stored only if the program b ranch PARAMETER is finished completely once.
Select the program branch PARAMETER.
Press ENTER.
7.5.1 Outer Pipe Diameter / Pipe Circumference
Enter the outer pipe diameter. Press ENTER. If the entered outer diameter is > 1000 mm, no reflection measurement can be performed.
It is possible to enter the pipe circumference instead of the outer pipe diameter. The setting is cold start resistant. It will be activated in the program branch SPECIAL FUNCTION. If the input of the pipe circumference has been activated and 0 (zero) is entered for the OUTER DIAMETER, the menu item PIPE CIRCUMFER. will be displayed automatically. If the pipe circumference is not to be entered, press key BRK to return to the main menu and start the parameter input again.
7.5.2 Pipe Wall Thickness
Enter the pipe wall thickness. The range depends on the connected transducers. Default is 3.0 mm.
Press ENTER.
To get the wall thickness refer to the data sheet of the pipe manufacturer or use a device to measure the wall thickness like the UWD 200.
Note: The inner diameter (= outer diameter - 2x pipe wall thickness) will be calculated internally. If the value is not within the inner pipe diameter range of the connected transduc ers, an error message will be displayed. It is possible to change the lower limit of the inner pipe diameter for a given transd ucer type (see section 9.7).
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7.5.3 Pipe Material The pipe material has to be selected to determine the sound velocity. The sound velocities for the materials in the scroll list are stored in the device. After the pipe material has been selected, the UDM 200 automatically selects the appropriate sound velocity.
Select the pipe material from the scroll list. If the material is not in the scroll list, select OTHER MATERIAL. Press ENTER.
Note: One can configure which materials are available in the selection lists (see section 13.1)
If OTHER MATERIAL is selected, the sound velocity has to be entered. Enter the sound velocity of the pipe material. Values between 600.0 m/s and 6553.5 m/s will be accepted. Press ENTER. (For the sound velocity of some materials see the annex)
Note: Enter the sound velocity of the material (i.e. long itudinal or transversal velocity) which is nearer to 2500 m/s.
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7.5.4 Pipe Lining
If the pipe has an inner lining, select YES.
Press ENTER.
If NO is selected, the next parameter will be displayed.
Select the medium from the scroll list. If the material is not in the scroll list, select OTHER MATERIAL. Press ENTER.
Note: One can configure which materials are available in the selection lists (see section 13.1).
If OTHER MATERIAL is selected, the sound velocity has to be entered. Enter the sound velocity of the pipe material. Values between 600.0 m/s and 6553.5 m/s will be accepted. Press ENTER. (For the sound velocity of some materials see the annex)
Enter the thickness of the liner. Default is 3.0 mm. Press ENTER.
Note: The inner diameter (= outer diameter - 2x pipe wall thickness - 2x liner thickness) will be calculated internally. If the value is not within the inner pipe diameter range of the connected transducers, an error message will be displayed.
7.5.5 Pipe Roughness The flow profile of the medium is influenced by the roughness of the inner pipe wall. The roughness will be used for the calculation of the profile correction factors. As the pipe roughness can not be exactly determined in most cases, it has to be estimated. For the roughness of some materials see the annex. The values are based on experience and measurements.
Enter the roughness for the selected pipe or lining material. Values between 0.0 mm and 5.0 mm will be accepted. Default is 0.1 mm.
Press ENTER.
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7.6 Input of the Medium Parameters After the pipe parameters have been entered, the UDM 200 asks for the medium parameters. Since the UDM 200 is designed to fit to the needs of water suppliers, only water and seawater are available as predefined mediums. But other mediums can be also measured be selecting OTHER MEDIUM. In this case, the following parameters have to be entered:
• min. and max. sound velocity, • kinematic viscosity of the medium, • density of the medium (only if the output option MASS FLOW is activated) • temperature of the medium
Select the medium from the scroll list.If the medium is not in the scroll list, select OTHER MEDIUM. Press ENTER.
If a medium is selected from the scroll list, the menu item for the input of the medium temperature will be displayed directly.
If OTHER MEDIUM. has been selected, the parameters listed above have to be entered first.
Note: One can configure which materials are available in the selection lists (see section 13.1).
7.6.1 Sound Velocity The sound velocity of the medium is used for the calculation of the transducer distance at the beginning of the measurement. However, the sound velocity does not influence the measuring result directly. Often, the exact value of the sound velocity for a given medium is unknown. A range of possible values for the sound velocity must therefore be entered.
Enter the min. and max. sound velocity of the medium. Values between 800.0 m/s and 3500.0 m/s will be accepted.
Press ENTER after each input.
7.6.2 Kinematic Viscosity The kinematic viscosity influences the flow profile of the medium. UDM 200 uses the entered value of the kinematic viscosity as well as further parameters for a profile correction.
Enter the kinematic viscosity of the medium. Values between 0.01 mm2/s and 30 000.00 mm2/s will be accepted. Press ENTER.
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7.6.3 Density The density of the medium has to be entered. The mass flow will be calculated on the basis of the density (product of volume flow and density).
Note: If the mass flow is not measured, press ENTER. Other measuring results will not be influenced.
Enter the operating density of the medium. Values between 0.10 g/cm3 and 20.00 g/cm3 will be accepted. Press ENTER.
7.6.4 Medium Temperature UDM 200 uses the medium temperature to calculate the distance between the transducers (recommended distance at begin of measurement).
Enter the medium temperature. The value must be within the operating temperature range of the transducers. Default is 20 °C. Press ENTER..
Note: The range of possible medium temperatures depends o n the operating range of the chosen transducers.
7.6.5 Cable Length
If the transducer cable has to be extended, enter the additional cable length (not the entire cable length). Press ENTER. The sensors of the UDM 200 are already equipped with 5m cables If you don’t use an additional cable extension, leave this value on 0.
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7.7 Realize Measurement / Menu MEA
Select program branch MEASURING in the main menu. Press ENTER.
If this error message is displayed, please enter the missing parameters in program branch PARAMETER.
7.7.1 Assign a Number to Measuring Point At first you can assign a number and a comment to the measuring point.
Enter values by using the keys
.
Parameter !
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7.7.2 Define Number of Sound Paths The sound path is the number of the transits of the ultrasonic waves through the medium in the pipe. A sound path number of "0" makes no sense. At an odd number of transits (diagonal mode), the transducers will be mounted on opposite sides of the pipe (see figure below). At an even number of transits (reflection mode), the transducers will be mounted on the same sides of the pipe (see figure below). An increased number of transits mean increased accuracy of the measurement. However, the increased transit distance leads to a higher attenuation of the signal. The reflections on the opposite pipe wall and deposits on the inner pipe wall cause additional amplitude losses of the sound signal .If the signal is attenuated strongly by the medium, the pipe, deposits, etc., the number of sound paths has to be set to 1 if necessary.
Arrangement of the transducers in diagonal mode
Arrangement of the transducers in reflection mode
Number of sound paths
Sound path Number of sound paths
Sound path
1
2
3
4
and so on
Note: Correct positioning of the transducer is easier for an even number of transit paths than for an odd number.
A value for the number of sound paths corresponding to the connected transducers and the entered parameters will be recommended.
Change the value if necessary.
Press ENTER.
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7.8 Mounting and Positioning the Transducer
7.8.1 Transducer Distance
REFLEC - reflection mode DIAGON - diagonal mode
A value for the transducer distance will be recommended.
The transducer distance given here is the distance between the inner edges of the transducer. A negative transducer distance is possible for a measurement in diagonal mode on very small pipes, how the following illustration shows:
Note: The accuracy of the recommended transducer distance depends on the accuracy of the pipe and medium parameters ente red.
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7.8.2 Mounting the Transducers
Fasten the transducers the way that the engravings form an arrow.
Note: • Rust, paint or other deposits o n the pipe will absorb the sound signal. Clean the pipe at the transducer positions. Remove rust or loose paint. An existing paint layer on the pipe sh ould be sanded for a better measuring result.
• Use coupling foil or apply a bead of acoustic coupl ing comp ound along the center line onto the contact surface of the tra nsducer.
• There should be no air pockets between transducer contact surface and pipe wall.
7.8.3 Mounting the transducers with transducer shoe s and chains • Plug the sensors into the connector shoes. Turn the screw on the top of the connector shoe by 90°
so that the end of it latches into the groove of the sensor and holds it in place.
• Push the guide rule into the side slot on the rails. Align the sensor distance as recommended for the UDM 200 and block the sensors using the small plastic screws on sensor cable side of the connector shoes.
-60 0 0302010mm 80706050 110 1201090 330320
• Place the connector shoe and guide rule at the test point on the pipe.
• Push the last ball of the chain into the slot on the top of the connector shoe.
• Pay the chain around the pipe (if the chain is not long enough, see the next section).
Note: If the sensors were fastened to a vertical pipe and the UDM 200 is lower than the pipe, we recommend laying the cable of the upper sensor below the tensioning belt to protect it from mechan ical strain.
• Tighten the chain and insert it into the second slot in the connector shoe.
• Fasten the other sensor in the same way.
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7.8.4 Lengthening the Fastening Chain To lengthen the chain, push the last ball of the extension into the clamp on the ball chain. The spare clamps supplied with the chain can be used for repairing a broken chain.
7.8.5 Fine Adjustment of the Transducer Distance
If the transducers are armed, press ENTER to confirm the transducer distance. The measuring operation is started.
A bar graph S= displays the amplitude of the received signal.
Shift the transducer slightly until the bar graph has max. length and is also stable.
By scrolling with key through the upper line and with
key through the lower line
• transducer distance
• bar graph Q= (signal quality)
• transit time TRANS. in microseconds
• bar graph S= (signal amplitude) can be displayed. If the signal quality is not sufficient for measurement, Q=UNDEF will be displayed.
After the precise positioning of the transducers, the recommended transducer distance is displayed again.
Enter the actual (precise) transducer distance and press ENTER or simply confirm the displayed value by pressing ENTER.
Note: The UDM 200 is able to display the latest entered p recise transducer distance.
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7.8.6 Start of Measurement As soon as the precise transducer distance has been entered, the measuring process starts automatically.
You can return to the bar graph by pressing ENTER.
The results are displayed according to the actually selected output options (see chapter 8). By default the volume flow in m3/h is displayed. The selection of the values to be displayed and the setting of the output options are described in chapter 8. Advanced measuring functions are described in chapter 9.
7.9 Recognition of Flow Direction The flow direction in the pipe can be recognized with the help of the displayed volume flow in conjunction with the arrow engraved on the transducers: The medium flows in arrow direction if the displayed volume flow is positive (e.g. 54.5 m3/h). The medium flows against the arrow direction if the displayed volume flow is negative (e.g. -54.5 m3/h).
7.10 Stopping of Measurement The measurement can be interrupted at any time by pressing key BRK .
Attention! Be careful not to interrupt a current measurement b y inadvertently pressing key BRK!
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8 Displaying the Measured Values / Menu OPT The physical quantity will be set in the program branch OUTPUT OPTIONS (see section 8.1). The designation of the physical quantity will be displayed normally in the upper line, its value in the lower line. The display can be adapted according to your needs.
8.1 Selection of the Physical Quantity and of the Unit of Measurement
The following physical quantities can be measured:
• flow velocity
• volume flow
• mass flow
For the sound velocity measurement, no unit has to be selected. The flow velocity is directly measured. The volume flow will be calculated by multiplying the flow velocity by the cross-section of the pipe. The mass flow will be calculated by multiplying the volume flow by the density of the medium
Select the program branch OUTPUT OPTIONS.
Select the required physical quantity in the scroll list.
Press ENTER.
For the selected physical quantity, a scroll list with the available units of measurement is displayed. The previously selected unit of measurement is displayed first. Select the unit of measurement for the selected physical quantity. Press ENTER.
You can return to the main menu by pressing key BRK . The further menu items of the program branch OUTPUT OPTIONS are for the activation of the measured value output.
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8.2 Display Setting During measurement, the display can be set as to display two measured values simultaneously (one in each line of the display (standard settings)). The display can be adapted to your requirements. The modification does not influence the current measurement. The following information can be displayed in the upper line:
• designation of the actually measured and stored physical quantity • totalizer values (if activated) • date and point in time, when the memory will be full • measuring mode • transducer distance (see the following section) • alarm state indication, if activated (see chapter 10) and if alarm outputs are activated
The following information can be displayed in the lower line:
• flow velocity • mass flow • volume flow
The display in the upper line can be changed during measurement with key .
The display in the lower line can be changed during measurement with key .
The character “*” indicates that the displayed value (here: flow velocity) is not the selected physical quantity (here: volume flow).
8.3 Transducer Distance
By pressing key it is possible during measurement to scroll to the display of the transducer distance. The current optimum transducer distance is displayed in parentheses (here: 51.2 mm), followed by the entered transducer distance (here: 50.8 mm). The optimum transducer distance might change during measurement (e.g. due to temperature fluctuations). A possible deviation from the optimum transducer distance (here: -0.4 mm) will be compensated internally.
Attention! Never change the transducer distance during measure ment!
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8.4 Storage and Output of Measured Data The following data can be stored or transmitted to a PC during a measurement:
• Date • Time • Measuring point number • Pipe parameters • Medium parameters • Transducer parameters • Sound path (reflection or diagonal) • Transducer distance • Damping value • Storage rate • Measurand • Unit • Measured values
The stored data can be transmitted to a PC at a later point in time (offline output).
Note: The UDM 200 can store up to 100 series of measured values. The number of measured values that can be generated dep ends on the total number of values stored in the previous serie s.
If all the values stored in the device are deleted and a new test is started with only one parameter +on a test chann el without mass storage, up to 27,000 readings can be stored i n this new series.
8.4.1 Storing Measured Data During the selection of the output options (OUTPUT OPTIONS branch), it can be specified whether or not and in which rate, the measured data shall be stored during the measurement.
Select Yes to activate the storage of measured data. Press ENTER.
Select a storage rate. If the required storage rate is not available, select EXTRA and specify a custom storage rate between 1 and 43200 (12 hours) seconds. Press ENTER.
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8.4.2 Output to a PC via Serial Interface
In order to activate the direct transmission of the measured data to a PC (connected via serial interface), select the branch SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING and press ENTER.
Select YES to activate the serial output to the PC. Press ENTER. If no storage rate is selected, the standard rate or the last selected rate is used.
Select a storage rate. If the required storage rate is not available, select EXTRA and specify a custom storage rate between 1 and 43200 seconds (12 hours). Press ENTER.
Note: To send the data directly to the PC, open a termina l program (e.g. Windows Hyperterminal). Set the following con nection parameters: baud rate 9600, data bits: 8, stop bits : 2, parity: even, flow control: hardware. Open the connection b efore you continue on the UDM 200
8.4.3 Measured Data Memory during Measurement When testing with the activated memory function, a message appears as soon as the memory is full. Press ENTER to acknowledge the message. The main menu is displayed.
Note: The UDM 200 interrupts the measurement as soon as t he internal memory is full if no output option other than savin g was selected.
If another output option (e.g. serial output) was s elected, the UDM 200 continues the measurement. Only the saving of measured data is stopped. The error display appears at regul ar intervals.
To delete the memory, go to the Special functions m enu.
8.4.4 Offline Output of Measured Values With offline output, the measured values in the memory are output. The data can then be transferred:
- To a printer connected to the serial interface of the UDM 200 - To a terminal program (e.g. Windows Hyperterminal) - To a special program that displays the data of the UDM 200
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8.4.5 Saving the Counter It is possible to only save the value of the displayed counter, or a value for each flow direction. This setting is not affected by cold starts. Select the option Quantity Storage under SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING . If you select ONE, the UDM 200 only saves the displayed counter. If you select BOTH, the counters of both flow directions are saved. Press ENTER to confirm.
Note: The UDM 200 only saves the counter if it is activat ed and the data storage function is enabled. Storing a counter reduces the total number of measured values that can be saved b y about two thirds.
Example: In the SPECIAL FUNCTION menu, the UDM 200 shows that 10,000 more measured values can be saved. If the counters are activated and only once counter is saved, 3,333 data fields are available. If both counters are saved, 2,000 data saving operations can be performed.
8.4.6 Storing the Signal Amplitude Select the option Store Amplitude under the branch SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING .
Select ON, if you want the signal amplitude to be stored in addition to the measured data. Press ENTER.
8.4.7 Storing the Sound Velocity of the Medium Select the option c-Medium under the branch SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING.
Select ON, if you want the sound velocity to be stored in addition to the measured data. Press ENTER.
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9 Advanced Measuring Functions
9.1 Command Execution during Measurement Commands executable during a measurement are shown in the upper line. A command always begins
with "�". Scroll in the upper line with key until the needed command is displayed. Press ENTER. Depending on the instrumentation a program code might be needed. The following commands are available:
COMMAND EXPLANATION
�ADJUST TRANSDUCERS
Switch over to the operation mode transducer positioning. If a program code is active, the current measurement will be automatically continued 8 seconds after the last keyboard entry.
�CLEAR TOTALIZER
The totalizers will be reset to zero.
�BREAK MEASURE Stop measuring and return to main menu. If a program code is active, at first the six-figure BREAK-CODE has to be entered
9.2 Damping Factor Each displayed measured value is the floating average of all measured values of the last x seconds, where x is the damping factor. A damping factor of 1 s means that the measured values are not averaged as the measuring rate is approx 1/s. The default value of 10 s is appropriate for normal flow conditions. Strongly fluctuating values caused by high flow dynamics require a larger damping factor. Select the program branch OUTPUT OPTIONS. Press ENTER until the menu item DAMPING is displayed.
Enter the damping factor. Values between 1 s and 100 s will be accepted. Press ENTER.
You can return to the main menu by pressing key BRK .
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9.3 Totalizers Total volume or mass of the medium at the measuring point can be determined.
• There are two totalizers, one for the positive flow direction, one for the negative flow direction.
• The unit of measurement used for totalization corresponds to the volume or mass unit selected for the physical quantity (see section 8.1).
• The value of a totalizer consists of max. 11 digits, including max. 3 decimal places.
Scroll in the upper line with key to display the totalizers. Press ENTER while a totalizer is displayed to toggle between the display of the totalizers for both flow directions.
Select the command CLEAR TOTALIZER in the upper line to reset the totalizers to zero. Press ENTER.
Note: Flow velocities cannot be totalized.
9.3.1 Store the Totalizer Value The behavior of the totalizers after an interruption of the measurement or after a RESET of the flowmeter will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING. The setting is cold start resistant.
Select option QUANTITY RECALL in the list MEASURING. If you select ON, the values of the totalizers will be stored and used for the next measurement If you select OFF, the totalizers will be reset to zero.
9.3.2 Overflow of the Totalizers There are two different modes the totalizers can work in:
• Without overflow: The value of the totalizer increases to the internal limit of 1038. The values will be displayed as exponential numbers (±1.00000E10), if necessary. The totalizer can only be reset to zero manually.
• With overflow: The totalizer will be reset to zero automatically as soon as ±9999999999 is reached.
Independently of the selected list item, the totalizers can be reset manually to zero. The totalizer mode will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING . The setting is cold start resistant.
Select the menu item QUANT. WRAPPING. Select ON to work with overflow. Select OFF to work without overflow.
Note: • The output of the sum of both totalizers (the throu ghput �Q) via an output will not be valid anymore after the first overflow (wrapping) of one of the respective totalizers.
• To signalize the overflow of a totalizer, an alarm output with the switching condition QUANTITY and the type HOLD has to be activated.
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9.4 Upper Limit of the Flow Velocity Single outliers caused by heavily disturbed surroundings can appear in the measured values of the flow velocity. If outliers are not ignored, they will affect all derived physical quantities, which will then be unsuitable for integration (e.g. pulse outputs).
It is possible to ignore all measured flow velocities higher than a preset upper limit. These measured values will be marked as outliers.
The upper limit of the flow velocity will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING. The setting is cold start resistant.
Select the menu item VELOCITY LIMIT . Enter the upper limit of the flow velocity Values between 0,1 und 25,5 m/s will be accepted. Enter “0” (zero) to switch off the velocity control. Press ENTER
If the control is switched on (upper limit > 0.0 m/s), every measured flow velocity willl be compared to the entered upper limit. If the flow velocity is higher than the upper limit,
• the flow velocity will be marked as “invalid”!. The physical quantity can not be determined. • "!" will be displayed after the unit of measurement. (In case of a normal error, "?" will
be displayed.)
Attention! If the upper limit is too low, a measurement might be impossible, as most of the measured values will be marked "inva lid".
9.5 Cut-off Flow The cut-off flow function automatically sets all measured flow velocities to zero that are below a preset value. All values derived from this measured value will be also set to zero. The cut-off flow can depend on the flow direction or not. The default is 5 cm/s. The max. value is 12.7 cm/s. The cut-off value will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING. The setting is cold start resistant.
Select ABSOLUTE to define a cut-off flow independent of the flow direction. There is only one limit to be set. The absolute value of the measured value will be compared to the cut-off flow.
Select SIGN to define a cut-off flow dependent on the flow direction. There are two independent limits to be set for the positive and negative flow directions.
Select FACTORY to use the default value of 5 cm/s for the cut-off flow.
Select USER to enter the cut-off flow yourself.
Press ENTER.
If you selected CUT-OFF FLOW\SIGN before, two cut-off flow values have to be entered:
Enter the cut-off flow for positive measured values.
If a positive value is less than this limit, the flow velocity will be set to zero. All derived values will be set to zero, too.
Enter the cut-off flow for negative measured values.
If a negative value is greater than this limit, the flow velocity will be set to zero. All derived values will be set to zero, too.
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If you selected CUT-OFF FLOW \ ABSOLUTE before, only one value has to be entered.
The limit will be compared to the absolute value of the measured flow velocity.
9.6 Uncorrected Flow Velocity For certain applications, the knowledge of the uncorrected flow velocity might be of interest. Select the option Quantity Storage under the branch SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING in order to activate / deactivate the flow velocity correction. The setting is cold start resistant.
Select Normal for corrected flow velocity and select Uncorr. for uncorrected flow velocity. Press ENTER.
Henceforth, the UDM 200 asks whether or not the profile correction shall be enabled before a measurement is started.
If you select NO, correction is completely deactivated. All measuring factors are calculated with the uncorrected flow velocity. To make this clear, the names of the factors are shown in capital letters.
If you select YES, the UDM 200 only uses the uncorrected flow velocity if the FLOW VELOCITY factors was selected in the OUTPUT OPTIONS. The UDM 200 calculates all the other factors (volume flow, mass flow, etc.) using the corrected flow velocity. During the measurement, FLOW VELOCITY is shown in capital letters to indicate that the displayed flow velocity is not corrected. Press ENTER to confirm.
However, in both cases, the corrected flow velocity can be displayed. Scroll to the second line in the display
( button) until you see the flow velocity. The uncorrected flow velocity is marked with a “U”.
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9.7 Change of Limit for the Inner Pipe Diameter It is possible to modify the lower limit of the inner pipe diameter for a certain transducer type. The setting is cold start resistant.
Enter HotCode 071001. Enter the lower limit of the inner pipe diameter for the different transducer types. Values between 3 mm and 63 mm will be accepted. Press ENTER to confirm every single value.
9.8 Protection code for unwanted interruption A current measurement can be protected from an inadvertent intervention by a program code.
If a program code was defined, it will be requested as soon as there is an intervention in the measurement (a command or key BRK .)
If a program code is active, the message PROGRAM CODE ACTIVE will be displayed when a key is pressed. This advice disappears after several seconds.
To start a command, it is sufficient to enter the first three digits of the program code (= ACCESS code).
To interrupt a current measurement, the complete program code has to be entered (= BREAK code).
Attention! Do not forget the program code!
Select in the program branch SPECIAL FUNCTION the menu item SET PROGRAM CODE.
Enter a program code with max. 6 digits. Press ENTER.
An error message will be displayed if a reserved number has been entered (e.g. a HotCode for language selection). A program code remains valid as long as:
• no other valid program code is entered or
• the program code is not deactivated.
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9.8.1 Intervention in the Measurement If a program code was defined, the UDM 200 asks for this code as soon as someone tries to interrupt a running measurement.
Enter the program code (as necessary ACCESS- or
BREAK-Code) with the keys and . You can break up the program code input and return to measurement by pressing key “C”.
At first 000000 will be displayed. If the program code starts with 000 , ENTER can be pressed directly.
If the entered program code is not valid, a failure notice will be displayed for a few seconds. If the entered program code is valid, the according command will be accomplished or the measurement will be interrupted.
9.8.2 Deactivation of a Program Code
Select in the program branch SPECIAL FUNCTION the menu item PROGRAM CODE. The program code will be deleted by entering “------ ”. Press ENTER. Important note: If the character “- “ is entered less than six times, this character string will be used as new program code.
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9.9 Measuring the Sound Velocity of the Medium
Select OUTPUT OPTIONS in the main menu.
Select the sound velocity as the measuring factor. Press ENTER to confirm.
This selection closes OUTPUT OPTIONS, because there can be no output of measured values during the sound velocity measurement. To start the sound velocity measurement, select MEASUREMENT.
Enter an estimated sound velocity for the medium. Values between 800 and 3500 m/s are accepted. Press ENTER to confirm.
Select YES to perform a reflection measurement, or NO to perform a diagonal measurement. Generally, it is easier to position the sensors correctly for a reflection measurement than for a diagonal measurement.
Fasten the sensors to the pipe. Make sure the sensor distance is as recommended. Press ENTER to confirm. (The UDM 200 calculates this sensor distance from the estimated sound velocity and the current parameters.)
The signal amplitude is shown on the bar chart. Move the sensors relative to each other, until the bars start getting smaller. Find and adjust the maximum signal amplitude at the shortest possible sensor distance. Press ENTER to finish positioning the sensors.
Note: Do not move the sensors any more.
Measure the current (exact) sensor distance and enter it. In this example the sensor distance is 25.5 mm. Press ENTER to confirm.
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An error message may now appear, stating that the estimated value is too high or too low. In both cases, the estimated sound velocity you entered deviates too far from the actual sound velocity. The sensors were positioned on an false signal or an echo.
Press ENTER to acknowledge the error message. Enter a new estimated sound velocity.
The measurement starts as soon as you have entered an estimated value comparable to the actual sound velocity of the medium.
9.9.1 Displayed Information
Press the and buttons to see more information in the top or bottom line of the display.
Current sensor distance (L): The distance entered for the last positioning of the sensors. This value is used for calculating the sound velocity.
Improved distance (L*): The sensor distance calculated from the measured sound velocity. This distance enables you to identify incorrect positioning. However, do not alter the sensor distance!
Signal propagation display (t): The signal propagation delay in the medium can be displayed in the top line.
Press ENTER to finish the current measurement.
You can now repeat the positioning of the sensors.
The UDM 200 asks if you want to determine the correct sensor distance again. Select NO if the sound velocity of the medium was precisely measured (sensor positioning error |L*-L | less than 1 mm). Select YES if the difference between the current sensor distance and the “improved” distance is more than 1 mm or if the signal was not detected. A new measurement is started.
You can repeat the measurement as often as you want. In most cases, however, one or two measurements are enough to determine the sound velocity.
Select YES so save the measured sound velocity in the current parameter record.
You can edit the measured sound velocity before saving it. Press ENTER to confirm. The name of the medium in the parameter record is changed to OTHER MEDIUM.
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10 Output The UDM 200 is equipped with outputs, which have to be installed and activated before they can be used. It takes two steps to install an output:
• defining the physical quantity (source item) to be transmitted to the output by the source channel and the properties of the signal
• defining the behavior of the output in case no valid measured values are available
After that the installed output has to be activated (program branch Output Options ).
10.1 Activation The outputs will be activated in the program branch SPECIAL FUNCTION \ SYSTEM SETTINGS \ PROC. OUTPUTS.
Note: The configuration of an output will be stored at th e end of the dialog.
If the dialog is left by pressing ke y BRK, the changes will not be stored.
Select in SPECIAL FUNCTION \ SYSTEM SETTINGS the list item PROC. OUTPUTS. Press ENTER.
Select the output to be installed. The scroll list contains all actually available outputs. A tick � after a list item indicates that this output has already been installed. Press ENTER.
This display is indicated if the output has not been installed yet. Select YES. Press ENTER.
If the output is already installed, select NO to reconfigure it or YES to return to the previous menu item to select another output. Press ENTER.
Select the physical quantity (source item) to be transmitted from the source channel to the output. The available source items and the according configuration options are summarized in the following table. If a binary output is configured, only the list items LIMIT and IMPULS will be displayed.
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Table: Configuration options of the outputs
source item available configuration options
output
Measuring value actual measur
flow
heat flow
physical quantity selected in the program branch OUTPUT OPTIONS
Quantity Q+ totalizer for the positive flow direction
Q- totalizer for the negative flow direction
ΣQ sum of the totalizers (positive and negative flow direction)
Limit R1 limit message (alarm output R1)
R2 limit message (alarm output R2)
R3 limit message (alarm output R3)
Impuls from abs (x) pulse without sign consideratio n
from x > 0 pulse for positive measured values
from x < 0 pulse for negative measured values
Miscellaneous c-Medium sound velocity of the medium
Signal signal amplitude of a measuring channel
10.1.1 Output Range
When configuring an analog output, the output range will be defined now. Select a list item or OTHER RANGE to enter the output range manually.
If OTHER RANGE.. is selected, enter the values OUTPUT MIN and OUTPUT MAX. Press ENTER after each input.
This error message will be displayed if the output range is not min. 10 % of the max. output range. The next possible value will be displayed. Repeat the input.
Example: IMAX - IMIN �
2 mA for a 4…20 mA
current output
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10.1.2 Error Output In the further dialog, an error value can be defined which is to be output if the source item can not be measured e.g. when gas bubbles are in the medium. Table: Error Output Options
error output option result
MINIMUM output of the lower limit of the output range
LAST VALUE output of the last measured value
MAXIMUM output of the upper limit of the output range
OTHER VALUE The value has to be entered manually. It has to be within the limits of the output
Example: The volume flow has been selected as source item for a current output, the output range is 4...20 mA, the error value delay td > 0.
The volume flow can not be measured in the time interval t0...t1. Which signal shall be displayed during this time?
???v [m3/h]
tt0 t1
Fig.: error output
Table: Error Output Options
selected error output option output signal
I [mA]
20
4
t
td
I [mA]
20
4
t
I [mA]
20
4
t
td
50
error output = 2.00 mA
I [mA]
20
4
t
td
Select a list item for the error output. Press ENTER.
If OTHER VALUE ... is selected, enter an error value. It has to be within the limits of the output. Press ENTER.
Note: The settings will be stored now at the end of the d ialog.
The terminals to be used are now displayed (here: P1+
und P1- for the active current loop) Press ENTER.
10.1.3 Function Test The function of the installed output can now be tested. Connect a multimeter to the installed output. Test of the Analog Outputs
The current output is tested in the example. Enter a test value. It has to be within the output range. Press ENTER.
If the multimeter displays the entered value, the input works. Select YES to repeat the test, NO to return to SYSTEM SETTINGS. Press ENTER.
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Test of the Binary Outputs
Select REED-RELAIS OFF in the scroll list OUTPUT TEST to test the de-energized state of the output. Press ENTER. The output should now be de-energised. (Measure the resistance at the output. The value has to be high ohmic.)
Select YES. Press ENTER.
Select REED-RELAIS ON in the scroll list OUTPUT TEST to test the energized state of the output. Press ENTER. The output should now be energised. (Measure the resistance at the output. The value has to be low ohmic.)
Select YES to repeat the test, NO to return to SYSTEM SETTINGS. Press ENTER.
10.2 Error Value Delay The error value delay is the time interval after which the error value will be transmitted to the output in case no valid measured values are available. The error value delay can be entered in the program branch OUTPUT OPTIONS if this menu item has been previously activated in the program branch SPECIAL FUNCTION. If you do not enter a value for the error delay, the damping will be used.
Select in SPECIAL FUNCTION \ SYSTEM SETTINGS \ DIALOGS/MENUS the menu item ERROR-VAL. DELAY.
Select DAMPING if the damping value is to be used as error value delay. Select EDIT to activate the error value delay request. From now on, the error value delay can be entered in the program branch OUTPUT OPTIONS. The setting is cold start resistant.
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10.3 Activation of an Analog Output Note: An output can only be activated in the program br anch
OUTPUT OPTIONS if it has been previously installed.
Select program branch OUTPUT OPTIONS in the main menu.
Select YES to activate an output. Press ENTER to confirm.
10.3.1 Measuring Range of the Analog Outputs After an analog output has been activated in the program branch OUTPUT OPTIONS, the measuring range of the source item has to be entered.
Enter in Zero-Scale Val. the lowest measured value expected. The unit of measurement of the source item will be displayed. Zero-Scale Val. is the measured value corresponding to the lower limit of the output range as defined in section 10.1.1.
Enter in Full-Scale Val. the highest measured value expected. Full-Scale Val is the measured value corresponding to the upper limit of the output range as defined in section 10.1.1.
Example: The output range 4…20 mA was selected for a current loop, the Zero-Scale Val value was set to 0 m3/h and the Full-Scale Val value to 300 m3/h. If the volume flow is 300 m3/h, a 20 mA signal is transmitted to the output. If the volume flow is 0 m3/h, a 4 mA signal is transmitted to the output.
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10.4 Activation of a Pulse Output A pulse output is an integrating output which emits a pulse when volume or mass of the medium which has passed the measuring point reaches a given value (PULSE VALUE). The integrated quantity is the selected physical quantity. Integration is restarted when a pulse is emitted.
Note: The menu item PULSE OUTPUT will be displayed in the progr am branch OUTPUT OPTIONS only if a pulse output has been inst alled.
Select the program branch OUTPUT OPTIONS in the main menu.
Select YES to activate the output. Press ENTER.
This error message will be displayed if the flow velocity is selected as physical quantity. The use of the pulse output is not possible in this case as integration of the flow velocity does not result in a reasonable value.
Enter the PULSE VALUE. The unit of measurement of the current physical quantity will be displayed automatically. When the totalized physical quantity reaches the pulse value, a pulse will be emitted.
Enter the PULSE WIDTH. Values between 80 ms and 1000 ms will be accepted. The range of possible pulse widths depends on the specifications of the instrument (e.g. counter, PLC) which will be connected with the pulse output.
The max. flow that the pulse output can work with will be displayed now. This value is calculated from the data given for pulse value and pulse width. If the flow exceeds this value, the pulse output will not function properly. In such a case, the pulse value and pulse width should be adapted to the flow conditions. Press ENTER.
Attention! If the flow exceeds this max. value, the pulse outp ut will not function properly.
10.5 Activation of an Alarm Output
Note: The menu item ALARM OUTPUT will be displayed in the program branch OUTPUT OPTIONS only if an alarm output is installed .
Max. 3 alarm outputs R1, R2, R3 per channel operating independently of each other can be configured. The alarm outputs can be used to output information on the current measurement or to start and stop pumps, motors, etc.
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10.5.1 Alarm Properties The switching condition, the holding behaviour and the switching function can be defined for an alarm output: Table: Alarm Properties
alarm property setting description
FUNC (switching condition)
MAX The alarm will switch when the measured value exceeds the upper limit.
MIN The alarm will switch when the measured value falls below the lower limit.
+���� - -���� + The alarm will switch when the flow direction changes (sign change of measured value).
QUANTITY The alarm will switch when totalizing is activated and the totalizer reaches the limit.
ERROR The alarm will switch when no measurement is possible.
OFF The alarm is switched off.
TYP (holding behavior)
NON-HOLD If the switching condition is not true any more, the alarm returns to idle state after approx. 1 second.
HOLD The alarm is energized when the switching condition is true and de-energized when idle.
MODE (de-energized state of the alarm)
NO CONT. The alarm is energized when the switching condition is true and de-energized when idle.
NC CONT The alarm is de-energized when the switching condition is true and. energized when idle.
Attention! If no measurement takes place, all alarms will be d e- energized, independently of the programmed switching function.
Select the program branch Output Options in the main menu.
Select YES to activate the alarm output. Press ENTER.
The following list items are available: • FUNC for selecting the switching condition,
• TYP for selecting the holding behavior ,
• MODE for selecting the de-energized state of the alarm.
Select a scroll list in the upper line with keys and .
Use keys and to select the according settings in the second line. Press ENTER to store all changings.
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10.5.2 Setting the Limits If MAX or MIN has been selected in the scroll list FUNC, the limit of the output has to be defined:
Select in the scroll list INPUT the physical quantity to be used for comparison. The following list items are available: • volume flow • signal amplitude • sound velocity of the medium Press ENTER.
Enter the limit:
Table: limits
function display and comparison note MAX
measured value > limit The alarm will switch when the measured value exceeds the upper limit.
Example 1: upper limit = -10.0 m3/h A measured value of e.g. -9.9 m3/h exceeds the limit. The alarm switches. A measured value of e.g. -11.0 m3/h does not exceed the limit. The alarm does not switch.
MIN
measured value < limit The alarm will switch when the measured value falls below the lower limit.
Example 2: lower limit = -10.0 m3/h A measured value of e.g. -11.0 m3/h is below the limit. The alarm switches. A measured value of e.g. -9.9 m3/h is not below the limit. The alarm does not switch.
QUANTITY
totalizer ≥ limit The alarm will switch when the totalizer reaches the limit.
A positive limit will be compared to value of the totalizer for the positive flow direction. A negative limit will be compared to value of the totalizer for the negative flow direction. The comparison will also be made if the totalizer of the other flow direction is displayed.
Note: The limit values are interpreted in the respective active unit. If the global unit setting is changed, the limits a re not automatically adapted and have to be changed manual ly.
Example: If a limit of 60.0 m 3/h is defined and if the unit is changed to m 3/min, the limit has to be changed to 1,0 m 3/min
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10.5.3 Defining the Hysteresis A hysteresis can be defined for alarm output R1 preventing a constant triggering of the alarm by measuring values fluctuating marginally around the limit. The hysteresis is a symmetrical range around the limit. The alarm will be activated if the measured values exceed the upper limit and deactivated if the measured values fall below the lower limit. Example: The limit is 30 m3/h and the hysteresis 1m3/h. The alarm will be triggered at values > 30.5 m3/h deactivated at values < 29.5 m3/h.
Enter the preferred range of the hysteresis or 0 (zero) to work without it. Press ENTER.
10.6 Behaviour of the Alarm Outputs
10.6.1 Apparent Switching Delay Measured values and totalizer values will be displayed rounded to two decimal places. The limits, however, will be compared to the non-rounded measured values. This might cause an apparent switching delay when the measured value changes marginally (less than two decimal places). In this case, the switching accuracy of the output is greater than the accuracy of the display.
10.6.2 Reset and Initialization of the Alarms • After a cold start, all alarm outputs will be initialized. They will then be in the following state:
Table: State of the output after initialization
FUNC: OFF TYPE: NON-HOLD MODE: NO CONT LIMIT: 0.00
• (only valid from Firmware-Version 5.42) Press three times key C during measurement to set all alarm outputs to the idle state. Alarm outputs whose switching condition is still met will be reactivated after 1 second. This function is used to reset alarm outputs of type HOLD if the switching conditions is not met anymore.
• By pressing key BRK, the measurement will be stopped and the main menu selected. All alarm outputs are de-energised, independently of the programmed idle state.
10.6.3 Storage of Alarm Outputs The configuration of the alarm outputs is stored in the active parameter set (branch SPECIAL FUNCTION) and is automatically loaded, if the respective parameter set is loaded.
10.6.4 Alarm Outputs during Transducer Positioning When the positioning of the transducers begins (bar graph display), all alarm outputs switch back to the programmed idle state. If the bar graph is selected during measurement, all alarm outputs switch back to the programmed idle state. An alarm output of type HOLD being activated during the previous measurement remains in the idle state after transducer positioning if the switching condition is not anymore met. The same result can be achieved by pressing key C three times during measurement. Switching of the alarms into the idle state will not be displayed.
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10.6.5 Alarm Outputs during Measurement An alarm output with switching condition MAX or MIN will be updated max. once per second to avoid humming (i.e. fluctuation of the measured values around the value of the switching condition).
An alarm output of type NON-HOLD will be activated if the switching condition is met. It will be deactivated if the switching condition is not met anymore. The alarm remains activated min. 1 second even if the switching condition is met shorter.
Alarm outputs with switching condition QUANTITY will be activated immediately when the limit is reached.
Alarm outputs with switching condition ERROR will be activated only after several unsuccessful measuring attempts. Therefore, typical short-term disturbances of the measurement (e.g. switching on of a pump) will not activate the alarm.
If the alarm outputs are of type HOLD, they are switched back after the first measuring value has been recorded.
If there is an internal adaptation to changing measuring conditions, e.g. to a considerable rise of the medium temperature, the alarm will not switch.
Alarm outputs with the switching condition OFF are automatically set to the switching function NO CONT. The alarm output is de-energised.
Alarm outputs with switching condition +�- -�+ and type NON-HOLD will be activated with each change of the flow direction for approx. 1 second.
Alarm outputs with switching condition +�- -�+ and type HOLD will be activated after the first change of the flow direction. They can be switched back by pressing key C three times.
Fig: Behavior of a relay when the flow direction changes
Flow
type HOLD
type NON-HOLD
manual reset of the alarm
approx. 1 s
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10.6.6 Alarm State Indication
Note: There is no visual or acoustic indication of alarm switching.
The state of the alarm can be displayed during measurement. This function will be activated in SPECIAL FUNCTION \ SYSTEM SETTINGS \ DIALOGS/MENUS . The setting is cold start resistant.
Select the menu item SHOW RELAIS STAT. Select ON to activate the display of the alarm state.
Scroll during measurement with key until the state of alarm is displayed in the upper line.
The state of alarm will be displayed like this:
RX = , where is a pictogram according to the following Table:
Example: R1 = no. function type switching
function actual state
R =
1
none
NON-HOLD
NO CONT
closed
2
MAX
HOLD
NC CONT
open
3
MIN
+ �-
- �+
QUANTITY
ERROR
10.7 Deactivation of the Outputs If the programmed outputs are no longer required, they can be deactivated. The configuration of the deactivated output is stored and will be available when the output is reactivated.
To deactivate an output, select NO in the according program branch. Press ENTER.
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11 Settings and Special Functions/ Menu SF
11.1 Language Change (HotCode) To change the language you have to enter a so called HotCode.
Select menu SPECIAL FUNCTION \ SYSTEM SETTINGS \ MISCELLANEOUS \ Input a HOTCODE.
Select YES.
Enter the HotCode and confirm by pressing ENTER.
There will be a failure message, if the HotCode is invalid. Press any key to continue.
Select YES to carry on or NO to return to program branch MISCELLANEOUS.
HotCodes for language change:
909031 Dutch 909045 Danish 909033 French 909047 Norwegian 909034 Spanish 909048 Polish 909042 Czech 909049 German 909044 English 909090 Turkish
After the last digit has been entered, the new language is activated and the UDM 200 returns to the main menu. The selected language remains active even after the device has been restarted. If your language is not contained in the list, please contact SebaKMT.
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11.2 Time and Date UDM 200 has a battery buffered clock. Measured values will be stored automatically with time and date.
Select in SPECIAL FUNCTION \ SYSTEM SETTINGS the list item SET CLOCK. Press ENTER.
The actual time is displayed. Select OK to confirm the time or NEW to set the time. Press ENTER.
Select the digit to be edited by key .
Edit the selected digit by key and . Press ENTER.
The new time will be displayed. Select OK to confirm the time or NEW to set the time again. Press ENTER.
After the time has been set, DATE will be displayed Select OK to confirm the date or NEW to set the date. Press ENTER.
Select the digit to be edited by key .
Edit the selected digit by key and . Press ENTER.
The new date will be displayed. Select OK to confirm the date or NEW to set the date again. Press ENTER.
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11.3 Dialoges and Menus
Select SPECIAL FUNCTION \ SYSTEM SETTINGS . Select the list item DIALOGS/MENUS. Press ENTER.
Note: The settings of the menu item DIALOGS/MENUS will be stored at the end of the dialog. If the menu item is left before the end of the dialog, the settings will not be effective.
11.3.1 Pipe Circumference
Select ON if the pipe circumference has to be entered instead of the pipe diameter in the program branch PARAMETERS. The setting is cold start resistant. Press ENTER.
If ON has been selected for PIPE CIRCUMFER. the outer pipe diameter will be requested in the program branch PARAMETER nevertheless. To change to the menu item PIPE CIRCUMFER. , enter 0 (zero). Press ENTER.
The value displayed in PIPE CIRCUMFER. i s calculated on the basis of the last displayed value of the outer pipe diameter.
Example: 100 mm * � = 314.2 mm
Enter the pipe circumference. (The parameter limits for the circumference are calculated on the basis of the limits for the outer pipe diameter.)
During the next scroll through the program branch PARAMETER, the outer pipe diameter corresponding to the entered pipe circumference will be displayed.
Example: 180 mm : � = 57.3 mm
Note: The circumference is edited temporarily only. When the flowmeter switches back to the display of the pipe ci rcumference (internal recalculation), slight rounding errors may occur. Example: entered circumference: 100 mm displayed outer pipe diameter: 31.8 mm
When the flowmeter switches back to the circumferen ce internally, 99.9 mm will be displayed.
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11.3.2 Measuring Point Number Indication
If "1234" is selected, only figures, dots and hyphens can be used to name the measuring point number.
If "����" is selected, the ASCI editor can be used to name the measuring point number.
11.3.3 Display of the lastly entered Transducer Dis tance
If TRANSDUCER DISTANCE \ USER is selected, the after the positioning of the transducers lastly entered transducer distance will be displayed.
If the recommended and the entered transducer distance are not identical, the recommended value will be displayed in parentheses, followed by the lastly entered precise transducer distance. This adjustment is recommended if you work permanently on the same metering point.
If TRANSDUCER DISTANCE \ AUTO is selected, exclusively the after the positioning of the transducers recommended transducer distance will be displayed. This adjustment is recommended if you often change the metering point.
11.3.4 Error Value Delay
Select EDIT to enter an error value delay. The error value delay is the time after which an error value will be sent to an output if no valid measured values are available. Select DAMPING if the damping value is to be used as error value delay.
11.3.5 Alarm State Indication
Select ON to display the alarm state during measurement.
Note: All changes will be stored now at the end of the co nfiguration dialog.
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11.4 Measurement Settings
Select in SPECIAL FUNCTION \ SYSTEM SETTINGS the list item MEASURING. Press ENTER.
Note: The settings of the menu item MEASURING will be sto red at the end of the dialog. If the menu item is left before the end of the dialog, the settings will not be effective.
If you select NORMAL, corrected values of the flow velocity will be displayed.
If you select uncorr. , uncorrected values will be displayed. The setting is cold start resistant.
Press ENTER.
It can be defined how the cut-off flow is handled (see section 9.5).
An upper limit for the flow velocity can be entered. Values between 0.1 m/s and 25.5 m/s will be accepted. Enter 0 (zero) to switch off the flow velocity check.
Select the overflow behaviour of the totalizers (see section 9.3.2).
Select ON to keep the previous totalizer values after restart of the measurement. Select OFF to reset to zero the totalizers after restart of the measurement.
Note: All changes will be stored now at the end of the di alog.
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11.5 Configuring Serial Data Transfer You can set some format information for serial output under SPECIAL FUNCTION \ SYSTEM SETTINGS \ SERIAL TRANSMI SSION. This means you can adapt the output to the device the data is sent to: a PC or a printer
Target PC: Target printer:
Recommended setting ON. Space characters are not transferred when numerical values are exported. This significantly reduces the file size (making the transfer faster).
Recommended setting OFF – all measured valued in a column are printed below each other
The decimal separator for flow data (full stop or comma) differs from country to country.
This setting depends on the country.
The character used to separate columns (semicolon or tab) depends on the PC program. Normally, both separators can be used.
TAB increases the overall width of a column according to the tab stops on the printer.
11.6 Contrast
Select the branch SPECIAL FUNCTION \ SYSTEM SETTINGS \ MISCELLANEOUS and press ENTER.
The contrast of the display will be set by the following keys:
increases the contrast,
decreases the contrast.
Note: The display will be reset to medium contrast after a cold start.
11.7 Instrument Information
Select SPECIAL FUNCTION \ INSTRUM. INFORM. to obtain information about
• the type and serial number of thedevice and • the firmware version.
Press ENTER.
Type and serial number of the device are displayed in the upper line.
The firmware version with date is displayed in the lower line.
Press ENTER.
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11.8 Printing Measured Values With offline output, the measured values in the memory are output. The data can be transferred:
• to a printer connected to the serial interface of the UDM 200 or • as an ASCII file to a terminal program (e.g. HyperTerminal in Windows).
Select SPECIAL FUNCTION. Press ENTER to confirm Scroll through the list until you see PRINT MEAS. VAL. .
Press ENTER to confirm.
Connect the UDM 200 to a PC or printer using the serial interface. Press ENTER to start the output of the measured values. The display indicates that the measured values are being transferred.
The bar shows the progress of the data output.
11.9 Deleting Measured Values This special function enables you to delete measured values from the memory of the UDM 200. Select SPECIAL FUNCTION. Press ENTER to confirm Scroll through the list to DELETE MEAS. VAL. .
Press ENTER to confirm.
Select YES and press ENTER to confirm
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12 SuperUser Mode The SuperUser mode allows experimental work. Features of the SuperUser mode are:
• Defaults will not be observed.
• There are no plausibility checks when parameters are being entered.
• There is no check whether the entered parameters are within the limit determined by physical laws and technical data.
• The cut-off flow is not active.
• A value for the number of sound paths has to be entered.
It is possible to modify the lower limit of the inner pipe diameter for a certain transducer type without activating the SuperUser mode.
12.1 Activating/Deactivating Enter HotCode 071049 to activate the SuperUser mode.
It is displayed that the SuperUser mode is activated.
Press ENTER. The main menu will be displayed.
Enter HotCode 071049 again to deactivate the SuperUser mode.
It is displayed that the SuperUser mode is deactivated. Press ENTER. The main menu will be displayed.
The SuperUser mode will be deactivated by switching off the flowmeter, too.
12.2 Malfunctions in SuperUser Mode As the SuperUser mode operates without any plausibility check, absurd entries may result in an automatic switching-off of the device or in a crash of the internal software. An absurd entry is, e.g., 0 (zero) for the number of sound paths or 0.1 mm for the outer pipe diameter. Switch on the UDM 200 again and reactivate the SuperUser mode. If necessary, RESET the UDM 200 by pressing keys BRK , C and ENTER simultaneously.
Note: A Reset does deactivate the SuperUser mode.
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13 Libraries
Note: Only experienced users should use libraries. You ne ed the specific data for materials and substances supplied by the manufacturer.
SebaKMT does not have this information.
The internal database in the measuring device contains more than 20 different materials (pipe material, cladding) and more than 40 different media. You can select certain materials and media to appear in the PARAMETERS list (pipe material, cladding, medium). This means you can adapt the list to your particular measuring tasks. The reduced list makes your work more efficient (see the next section). An integrated user memory (coefficient memory) allows users to define other materials and media themselves. The properties of these materials can be saved in multiple instances depending on pressure and temperature if necessary. This user memory can be partitioned as required. You can find additional information on user-defined materials and media in the following sections.
13.1 Editing the Selection Lists The procedures for editing the material list and the medium list are the same, which is why only the editing procedure for the material list is described here.
Note: User-defined materials and media are always display ed in the PARAMETER selection lists.
Go to SPECIAL FUNCTION, select SYSTEM SETTINGS and press ENTER.
In the SYSTEM SETTINGS list select LIBRARIES and press ENTER.
Select MATERIAL LIST to edit the material list or MEDIUM LIST to edit the medium list. Select ...BACK to return to SYSTEM SETTINGS. Press ENTER to confirm.
Select FACTORY if you want the list to contain all the materials and media in the internal database. If you have created your own list, this is not deleted, only deactivated. Select USER to enable the user-defined list. Press ENTER to confirm.
If you selected USER, you can now edit the list. The options in the list are described in the following sections.
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After editing, select END OF EDIT and press ENTER.
Select YES to save all the changes to the list, or NO to quit the edit menu without saving. Press ENTER to confirm.
Note: If you press BRK to quit the edit menu without saving, all changes are discarded.
13.1.1 Displaying a Selection List
Select SHOW LIST and press ENTER to display the list as it will appear under PARAMETERS.
The current list is shown in the bottom line. User-defined materials and media are always shown in the current user-defined list.
Press ENTER to quit the current list and return to the list edit menu.
13.1.2 Adding a Material or Medium to the List
Select ADD MATERIAL or ADD MEDIUM to add a material or medium to the list. Press ENTER to confirm.
In the second line, the UDM 200 shows a list of all materials or media that are not contained in the current list. Select the material or medium to add and press ENTER. The material or medium is added to the list.
Note: The materials and media appear in the list in the o rder that they were added.
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13.1.3 Removing a Material or Medium from the List
Select REMOVE MATERIAL or REMOVE MEDIUM to delete a material or medium from the list.
In the second line, the UDM 200 shows a list of all materials or media that are contained in the current list. Select the material or medium to remove and press ENTER. The material or medium is removed from the list.
Note: User-defined materials and media are always shown i n the current user-defined list. They cannot be deleted.
13.1.4 Removing all Materials or Media from the Lis t
Select REMOVE ALL and press ENTER to delete all the materials or media from the current list. User-defined materials and media are not removed.
Note: User-defined materials and media are always shown i n the current user-defined list. They cannot be deleted.
13.1.5 Adding all Materials or Media to the List
Select ADD ALL and press ENTER to add all materials or media from the database to the current list.
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13.2 Defining New Materials or Media The UDM 200 enables you to extend the internal material database by defining materials or media (user-defined materials or media). The entries are saved in the user memory. The number of materials or media which can be defined depends on the partitioning of the user memory (see the next section). User-defined materials and media are always displayed in the PARAMETER selection list. The user-defined materials and media remain saved even after a cold start. The basic properties of a medium are its minimum and maximum sound velocity, its viscosity and its density. The basic properties of a material are its transversal and longitudinal sound velocity and a typical surface roughness. If the “Extended library” function is activated, you can define the medium properties as functions of the temperature or pressure. You can find additional information on the “Extended library” function in the following section.
Note: The user memory must be partitioned (divided), befo re the data can be stored.
13.2.1 Partitioning the User Memory The overall capacity of the user memory can be divided as required into the following material data types:
• Basic data of a material (sound velocity, typical roughness)
• Basic data of a medium (sound velocity, kinematic viscosity, density)
The following table shows the maximum number of data records for each category.
Table: User memory capacity
Maximum number of data records Assignment of user memory in %
Materials 13 97
Media 13 95
Go to SPECIAL FUNCTION \ SYSTEM SETTINGS \ LIBRARIES and select FORMAT USER-AREA. Press ENTER to confirm.
The following display appears if the required number of data records for a particular data type exceeds the capacity of the user memory.
Enter the number of user-defined materials. Press ENTER to confirm.
Enter the number of user-defined media. Press ENTER to confirm.
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Enter 0. You can only enter heat flow coefficients if your device is equipped with temperature inputs. Press ENTER to confirm.
Enter 0. You can only enter vapour phase coefficients if your device is equipped with temperature inputs. Press ENTER to confirm.
Enter 0. You can only enter concentration coefficients if your device is equipped with temperature inputs. Press ENTER to confirm.
The UDM 200 displays the assignment of the user memory for a few seconds.
The UDM 200 prompts you to confirm the selected partition. Press YES to start the partitioning. Press ENTER to confirm.
The UDM 200 partitions the user memory according to your entries. This takes a few seconds.
Once the partitioning is complete, the UDM 200 returns to the FORMAT USER-AREA display.
Preserving data when partitioning the user memory When repartitioning the user memory, the UDM 200 can retain up to 8 data records of each type. Example 1: You reduce the number of user-defined materials from 5 to 3. The data records #01 to #03 are retained. Data records #04 and #05 are deleted.
Example 2: You increase the number of user-defined materials from 5 to 6. All 5 data records are retained.
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13.2.2 Extended Library Function The EXTENDED LIBRARY function enables you to enter the medium and material properties as functions of the temperature or pressure. It must be enabled under SPECIAL FUNCTIONS before any material properties can be defined. The following table provides an overview of the material properties which can be entered and the measuring processes required for them. Table: Medium and material properties which can be stored
Property Property required for ...
Basic data of a medium
Sound velocity (MIN and MAX) Start of measurement
Viscosity Profile correction in the flow rate
Density Mass flow calculation
Basic data of a material
Transversal sound velocity Flow measurement
Longitudinal sound velocity Wall thickness and/or flow rate measurement
Type of sound wave Flow measurement
Typical roughness Profile correction of the flow rate
Only enter data which is relevant to your measurements.
Example: The density of a material is unknown. If you are not interested in the mass flow, you can enter any constant value for the density. The measurements for the flow rate and the volumetric flow are not affected. However, the measurement for the mass flow will be incorrect. The dependency of certain material properties on temperature and pressure can be described using first- to fourth-degree polynomials or other specialised interpolation functions. In most cases, however, a constant value or a linear dependency is sufficient. If, for example, the temperature fluctuations at the measuring point are relatively minor compared to the temperature dependencies of the material properties, linearisation or ignoring the temperature dependencies will not cause significant measuring errors. However, if the process conditions fluctuate greatly and the properties of the materials are highly temperature-dependent (such as the viscosity of hydraulic oils), polynomials or other interpolation functions should be used.
Specialised interpolations Some dependencies are difficult to approximate using polynomials. Therefore, the UDM 200 offers a specialised interpolation function (Option “Basics:Y=f(x,z) ”). Multidimensional dependencies (y=f(T,p)) can be interpolated using this function.
Go to SPECIAL FUNCTION \ SYSTEM SETTINGS \ LIBRARIES and select EXTENDED LIBRARY. Press ENTER to confirm.
Select OFF to disable the EXTENDED LIBRARY function. The properties of materials and media can then only be entered as constants. User-defined media or materials can be very easily defined. The library is compatible with firmware version V3.xx. Select ON to enter additional data or material properties that depend on temperature or pressure. Press ENTER to confirm.
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13.2.3 Entering Material or Medium Properties witho ut Using the Extended Library
Disable the extended library function (see the previous section) if you do not want to define material data that depends on temperature or pressure. The procedures for entering material and medium properties are the same.
Go to SPECIAL FUNCTION , select INSTALL MATERIAL or INSTALL MEDIUM and press ENTER.
An error message appears if you did not reserve enough space for the user-defined materials or media when partitioning the user memory. If this happens, partition the user memory accordingly (see the previous section).
Select EDIT and press ENTER.
Select one of the available memory spaces. Press ENTER to confirm.
The default name of a user-defined material or medium is USER MATERIAL N or USER MEDIUM N, where N is an integer. This name can be changed at any time.
Note: 95 ASCII characters (lowercase letters, uppercase l etters, numbers, special characters [! ? " + - ( ) > < % * etc.] ar e available for naming your material or medium. The name may not co ntain more than 16 characters.
Press ENTER to finish editing.
FOR A MATERIAL:
The UDM 200 asks for the sound velocity of the material. The table in the appendix contains the sound velocities of some materials. Values between 600.0 and 6553.5 m/s are accepted. Press ENTER to confirm.
Enter the roughness of the pipe here. The table in the appendix contains the typical roughness of some pipes. Press ENTER to confirm.
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FOR A MEDIUM:
Enter the minimum sound velocity for the medium to be measured in m/s. Values between 800.0 and 3500 m/s are accepted. Press ENTER to confirm.
Enter the maximum sound velocity for the medium to be measured in m/s. Values between 800 and 3500 m/s are accepted. Press ENTER to confirm.
Enter the kinematic viscosity of the medium. Values between 0.01 and 30,000.00 mm2/s are accepted. Press ENTER to confirm.
Enter the density of the medium. Press ENTER to confirm.
13.2.4 Entering Material Properties Using the Exten ded Library Make sure the extended library is enabled (see the previous sections).
Go to SPECIAL FUNCTIONS, select INSTALL MATERIAL and press ENTER.
An error message appears if you did not reserve enough space for the user-defined materials when partitioning the user memory. If this happens, partition the user memory accordingly.
Select the form of the temperature or pressure dependency for the material properties. Select Y=const . to enter the material properties as a constant.
Basics:Y=m*X +n Select Y=m*X +n to enter the material properties and linear functions of the temperature.
Basics:Y=Polynom Select Y=Polynom to enter the material properties as polynomials:
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33
2210 xkxkxkxkky ⋅+⋅+⋅+⋅+= .
Basics:Y=f(x,z) Select Y=f(x,z) to enter the material properties using one of the predefined functions (for experienced users only).
...go back Select …GO BACK to return to the previous menu.
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Select the material whose properties you want to define. The default name of a user-defined material or medium is USER MATERIAL N or USER MEDIUM N, where N is an integer.
If you select a material whose properties have already been defined, the UDM 200 prompts you to confirm. Select EDIT to edit the properties of the material or DELETE to delete the defined properties and return to the EDIT MATERIAL list.
Enter the material designation. Press ENTER to confirm.
The UDM 200 now asks you for the transversal and longitudinal sound velocities of the material (in m/s). According to the previously selected dependencies of the material properties to the process characteristics, you are then asked to enter one to five coefficients for each material property. Press ENTER to confirm each value. If you are editing a material that has already been defined, the UDM 200 asks you whether you want to edit each property. Select YES or NO, press ENTER to confirm and edit the coefficients if applicable
Select the type of sound wave to be used for the flow measurement. Normally, this is a transversal sound wave (TRANS). Press ENTER to confirm.
Enter the typical roughness of the material. Press ENTER to confirm.
Select YES to save the properties you entered or NO to quit the dialogue without saving. Press ENTER to confirm.
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13.2.5 Entering Medium Properties Using the Extende d Library Make sure the extended library is enabled.
Go to SPECIAL FUNCTION, select INSTALL MEDIUM and press ENTER.
An error message appears if you did not reserve enough space for the user-defined media when partitioning the user memory. If this happens, partition the user memory accordingly.
Select the form of the temperature or pressure dependency for the material properties. Select Y=const . to enter the material properties as a constant.
Basics:Y=m*X +n Select Y=m*X +n to enter the material properties and linear functions of the temperature.
Basics:Y=Polynom Select Y=Polynom to enter the material properties as polynomials:
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33
2210 xkxkxkxkky ⋅+⋅+⋅+⋅+= .
Basics:Y=f(x,z) Select Y=f(x,z) to enter the material properties using one of the predefined functions (for experienced users only).
...go back Select …GO BACK to return to the previous menu item.
Select the medium whose properties you want to define. The default name of a user-defined material or medium is USER MATERIAL N or USER MEDIUM N, where N is an integer.
if you select a medium whose properties have already been defined, the UDM 200 prompts you to confirm. Select EDIT to edit the properties of the medium or DELETE to delete the defined properties and return to the EDIT MEDIUM list.
Enter the medium designation. Press ENTER to confirm.
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The UDM 200 then prompts you to enter the longitudinal sound velocity (in m/s), the kinematic viscosity (in mm2/s) and the density (in g/mm3) of the medium. According to the previously selected dependencies of the medium properties to the process characteristics, you are then asked to enter one to five coefficients for each medium property. Press ENTER to confirm each value. If you are editing a medium that has already been defined, the UDM 200 asks you whether you want to edit each property. Select YES or NO, press ENTER to confirm and edit the coefficients if applicable.
Select YES to save the properties you entered or NO to quit the dialogue without saving. Press ENTER to confirm.
13.2.6 Deleting a User-Defined Material or Medium This is how to delete a user-defined material or medium:
Go to SPECIAL FUNCTION, select INSTALL MATERIAL or INSTALL MEDIUM and press ENTER to confirm. Select DELETE and press ENTER to confirm.
Select the material or medium to be deleted. Press ENTER to confirm.
The UDM 200 prompts you to confirm. Select YES or NO.
Press ENTER to confirm.
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14 PC Software The data stored in the UDM 200 (FLUXUS) can be transferred using a software program to a PC for processing.
Note: End all programs that access a COM port (such as AC TIVESYNC, HOTSYNC or SebalogView) before using this program. SebaKMT assumes that you are familiar with the basics of using a PC, i.e. yo u know how to find out which COM ports on your PC are available a nd which one you must select.
SebaKMT cannot offer support for the Windows operat ing system.
14.1 Symbols in the Menu Bar
Connects the PC to the UDM 200 and loads the data from the memory.
Load files
Save files
Use these symbols to select how the data is displayed: • Shows the parameter record • Shows the measured values in a table • Shows the measured values in a graph
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14.2 Connecting to the UDM 200 Connect the UDM 200 (FLUXUS) to the PC using the null modem cable supplied. If you have lost this cable, you can use any standard null modem cable. Go to the “Options” menu and select “Serial Interface”:
Go to “Interface” and select COM port you connected the cable to. Do not change the other settings.
Once you have selected the correct COM port, you can connect to the UDM 200.
Note: The COM port settings are different on each compute r and depend on the operating system. In particular, if you use an USB-RS232 adapter, the COM port may change if you plug the ad apter into various USB ports. SebaKMT cannot offer support for this.
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14.3 Downloading Data
As soon as you have selected the correct port, click the symbol. The PC connects to the UDM 200 and downloads the records.
You should then see at least one record in the software. If not, check that you have enabled the saving of measured data.
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Click the data records to activate them. You can then see the measured values, for example the flow rate:
Click the “Statistics...” button to see the most important data for the measurement (minimum, maximum, etc):
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14.4 Changing the Software Language You can select one of the available languages by clicking the icon with the flags.
14.5 Additional Software Options The UDM 200 (FLUXUS) menu contains additional options for loading data from the device:
Receive measure values Starts downloading data from the device
Date and time Synchronises the clock on the UDM 200 with the PC clock
Table values: - Materials
- Media
- Languages
Shows you data contained in the device: - Materials
- Media
- Pre-installed languages
Thermal flow coefficient The UDM 200 does not support this function
Reset COM port Ends communication with the UDM 200
Communication window Shows the communication window, which is normally only displayed during activity.
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15 Troubleshooting First Step: Check whether one of the situations listed below describes the problems you have with your device.
a) The display does not work at all or always fails. Make sure that the device is charged. If this is the case and if the accumulator is in good shape, the transducers or an internal component of the flowmeter are defective. Transducers and flowmeter have to be sent for repair to SebaKMT .
b) The message “SYSTEM ERROR” is displayed. Press key BRK to return to the main menu. If the message is displayed repeatedly, note the number in the lower line. Track down the situations when the error is displayed. Contact SebaKMT .
c) The UDM 200 does not react when key BRK is pressed during meas urement. A program code has been defined. Press key C and enter the program code.
d) The backlight of the display does not light, but all other functions are available. The backlight is defective. This problem has no influence on the other functions of the display. Send the flowmeter to SebaKMT for repair.
e) Date and time are wrong and the measured values are deleted a fter restart. The data backup battery has to be replaced. Send the device to SebaKMT .
f) An output does not work. Make sure that the outputs are configured correctly. Check the function of the output as described in section 10. If the output is defective, contact SebaKMT .
g) Measurement is impossible or the measured values substantially differ from the expected values. See section 15.1.
h) The totalizer values are wrong. See section 15.6. If any problem appears which can not be solved with the help of this manual, contact our sales office giving a precise description of the problem. Specify the type, serial number and firmware version of the flowmeter. Calibration The UDM 200 is a very reliable instrument. It is manufactured under strict quality control, using modern production techniques. If installed as recommended in an appropriate location, used cautiously and taken care of conscientiously, no troubles should appear. The device has been calibrated at the factory and usually, a re-calibration of the device will not be necessary. A re-calibration is recommended if • the contact surface of the transducers show visible wear or
• the transducers were used for a prolonged period at a high temperature (several months > 130 °C for normal transducers or > 200 °C for high tempera ture transducers).
The UDM 200 has to be sent to SebaKMT for recalibration under reference conditions.
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15.1 Problems with the Measurement a) A measurement is impossible as no signal is received. A ques tion mark will be displayed at
the right side of the lower line.
o Make sure that the entered parameters are correct, especially the outer pipe diameter, the wall thickness and the sound velocity of the medium. (Typical errors: The circumference or the radius was entered instead of the diameter. The inner diameter was entered instead of the outer diameter.)
o Are the transducers properly arranged? Do the arrows point to the right direction? Attention: The arrows on the transducer shoes might be arranged in a different way as the arrows on the transducers.
o Make sure that the transducer distance recommended by the UDM 200 was observed when mounting the transducers.
o Make sure that an appropriate measuring point has been selected (see section 7.1).
o Try to obtain better acoustic contact between the pipe and the transducers (see section 15.3.
o Enter a lower value for the number of sound paths. The signal attenuation might be too high due to a high medium viscosity or deposits on the inner pipe wall (see section 15.4).
b) The measuring signal is received but no measuring values can be obtai ned An exclamation mark "!" in the lower right edge of the display indicates that the defined upper limit of the flow velocity is exceeded and, thus, the measured values will be marked invalid. The limit has to be adapted to the measuring conditions or the check has to be deactivated (v max = 0). If no exclamation mark "!" is displayed, a measurement at the selected measuring point is impossible. c) Loss of signal during measurement If the pipe had been run empty and then has filled up again: Was there no measuring signal afterwards? Contact SebaKMT . Wait briefly until the acoustic contact is re-established. The measurement can be temporarily impossible by a high proportion of gaseous or solid particles in the medium. If the measurement does not start again, proceed as described under a). d) The measuring values substantially differ from the expected va lues Wrong measured values are often caused by wrong parameters. Make sure that the parameters entered are correct for the measuring point. If the parameters are correct, see section 15.5 for the description of typical situations in which wrong measured values are obtained.
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15.2 Correct Selection of the Measuring Point • Make sure that the recommended min. distance to any disturbance source is respected (see
section 7.3).
• When measuring on horizontal pipes, the transducers have to be mounted to the side of the pipes. Avoid locations where deposits are building in the pipe.
• A pipe vertically mounted has always to be filled at the measuring point, and the medium should flow upward.
• Bubbles should be avoided (even bubble-free media can form gas pockets when the medium expands, e.g. before pumps and after great cross-section extensions).
• Avoid measuring points in the vicinity of deformations and defects of the pipe and in the vicinity of weldings.
• Measure the temperature at the measuring point and make sure that the transducers are appropriate for this temperature.
Note: If the temperature fluctuates at the measuring poin t, it is important that the inner hook of the clasp grabs in the tensi on strip. Otherwise, the pressure of the transducer will be i nsufficient when the temperature is low.
For high temperature fluctuations, it is recommende d to fix the transducers with the help of the transducer shoes a nd chains which are equipped with springs compensating the temperat ure-dependant fluctuations of the pipe diameter.
• Make sure that the pipe diameter is within the measuring range of the used transducers.
15.3 Maximum Acoustic Contact To reach a maximum acoustic contact between pipe and transducers, the measuring point as to be prepared as follows: • Clean the pipe at the transducer positions. Remove rust or loose paint. Rust, paint or other
deposits on the pipe will absorb the sound signal.
• An existing paint layer on the pipe should be sanded for a better measuring result.
• Use coupling foil or apply a bead of acoustic coupling compound along the center line onto the contact surface of the transducer.
• There should be no air pockets between transducer contact surface and pipe wall. Make sure that the transducer mounting fixture applies the necessary pressure on the transducers.
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15.4 Application Specific Problems The sound velocity of the medium is wrong. The entered sound velocity will be used to calculate the transducer distance and, thus, is very important for the transducer positioning. The sound velocities programmed in the device only serve as orientation values. It might be necessary to determine the sound velocity first.
The entered pipe roughness is not appropriate . Reconsider the entered value, taking into account the state of the pipe.
Measurements on porous pipe materials (e.g. concrete or cast i ron) are only possible under certain conditions . Contact SebaKMT .
The pipe liner may cause problems during measurement if it is not at tached tightly to the inner pipe wall or consists of acoustically absorbing material . Try measuring on a liner free section of the pipe.
Media with high viscosity strongly attenuate the ultrasonic signa l. Measurements on media with a viscosity > 1000 mm2/s are only possible under certain conditions.
Higher proportions of or solids in the medium scatter and absorb ultras ounds and, therefore, attenuate the measuring signal . A measurement is impossible if the value is � 10 %. If the proportion is high, but < 10 %, a measurement might be possible under certain conditions.
The flow is in the transition range between laminar and turbulent flow where flow measurement is problematic. Calculate the Reynolds number of the flow at the measuring point with the program Flux-Flow. Contact SebaKMT .
15.5 High Measuring Deviations • The sound velocity of the medium is wrong. A wrong sound velocity can lead to the ultrasonic
signal reflected on the pipe wall being mistaken for the measuring signal passing the medium. The flow calculated from the wrong signal by the UDM 200 is very small or fluctuates around zero.
• There is gas volume within the pipe. If gas flows through the pipe, the measured flow values are always too high since both, the gas flow and the fluid flow, are measured.
• The defined upper limit of the flow velocity is too low. All measured flow velocities that are greater than the upper limit will be ignored and marked as invalid. All quantities derived from the flow velocity are marked as invalid, too. If several correct measured values are ignored, the totalizer values will be too low.
• The entered cut-off flow is too high. All flow velocities below the cut-off flow are set to zero. All derived values are set to zero as well. To measure at small flow velocities, the cut-off flow (default: 5 cm/s) must be set to an appropriate low value.
• The entered pipe roughness is inappropriate.
• The flow velocity to be measured is outside the measuring range of t he transducer.
• The measuring point is not appropriate. Select another measuring point to check whether the results are better. The cross-section of the pipe is never perfectly circular, thus influencing the flow profile. Change the transducer position according to the pipe deformation.
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15.6 Problems with the Totalizers • The totalizer values are too high:
See SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING \ QU ANTITY RECALL. If this menu item is activated, the totalizer values will be stored. The totalizer will take this value at the start of the next measurement.
• The totalizer values are too low: One of the totalizers has reached the upper limit and has to be reset to zero manually.
• The sum of the totalizers is not correct: See SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING \ QU ANT. WRAPPING. The output sum of both totalizers is not valid after the overflow (wrapping) of one of the totalizers.
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16 Technical Data UDM-200 Measuring principle Ultrasonic time difference correlation principle measurable media Warm / cold water and all acoustically conductive
fluids with < 10 % gaseous or solid content in volume
Flow velocity 0,01 – 25 m/s Repeatability ± 0.25% of reading ± 0.02m/s Resolution 0,025 cm/s Flow measurement 0,3 – 1.000.000 l/min Accuracy +- 1% - 3% of reading +- 0,1 m/s Average time 0 s to 100s, adjustable LCD display 2x 16 characters, backlit Interface RS 232 Outputs 0/4-20 mA, Impuls/Reed 48V, 100mA Internal memory capacity >100.000 values Operating time >24 h Power supply 100 – 240 VAC, 12 V (optional) Power consumption <15W Weight 2,9 kg Dimensions 230 x 110 x 190 mm Protection Class IP 67 (IP 68 closed) Ex-Protection class Zone 2 Operating temperature -10° - 60° C Measuring cycle (100…1000) Hz Response time 1s Measuring functions Physical quantities Flow velocity, volume flow, mass flow Totalizers Volume, mass Languages English, German, French, Dutch, Spanish,
Danish, Norwegian, Polish (others on request) Outputs Current 0/4…20 mA, Acuracy 0,1 % v. MW 15 ± µA Active output Rext < 500� Binary Open Collector 24 V/4 mA As state output Limit, sign change or error As impuls output Value: (0,01…1000) units
Width: (80…1000) ms Transducer (Possible) rated pipe diameter range 25…1000 mm Dimensions 58 x 28 x 31 in mm (L x B x H) Operating temperature -20 °C - 100 °C Protection Class IP 67 (IP68 optional)
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17 Appendix
17.1 Serial Output Format The parameter set is transferred at the start of the measurement, followed by the “/DATA” line and a line containing the column headers of the following table. After that, the measured values are transferred. Depending on the storage interval, one data line is transferred for each enabled measuring channel (the storage rate can be set separately for each channel). The blank line “???” is transferred if there are no measured values for the storage interval.
Example: If the storage interval is 1 s, 10 blank lines are transferred if the measurement is restarted after a break of 10 seconds for positioning the sensor.
The UDM 200 can transfer the data columns listed in the followin g table.
Column heading Column format Contents
Measuring channel
\*MEASURE ###000000.00 Variable selected in AUSGABEOPTIONEN
Q_POS +00000000.00 Counter value for positive flow direction
Q NEG -00000000.00 Counter value for negative flow direction
FQ_POS Flow counter value for positive flow direction
FQ NEG Flow counter value for negative flow direction
Name of other process inputs
SSPEED Sound velocity of a medium
KNZ Concentration in percent mass
AMP Signal amplitude
Online output (output during the measurement) With online output, all variables than can possibly occur during the measurement are generated in columns. The Q_POS and Q_NEG columns remain blank if the quantity counter is not activated. Because quantity counting cannot be activated for the flow velocity variable, no column is generated for it.
Offline output (output of stored measured values) With offline output, columns are only generated if there is at least one value for them in the data record. The Q_POS and Q_NEG columns are not generated if the quantity counter was not activated.
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17.2 Hyperterminal Transfer Parameters To connect to the UDM 200 using Windows Hyperterminal, the following parameter settings are required: RS232: Transfer rate: 9600 bits per second 8 data bits Even parity 2 stop bits Flow control: hardware Select the COM port that the UDM 200 is connected to. This depends on your Windows settings – you can find out by selecting the system setting. Protocol (RTS/CTS) UDM 200 sends CRLF-ASCII. Maximum line length: 255 characters.
17.3 Sound Velocity of Selected Pipe and Lining Mat erials at 20 °C The following table shows the sound velocity (longitudinal or transversal) of selected pipe and lining materials at 20 °C. The values of some of these mate rials are stored in the internal database of the device. In the column cflow , the sound velocity (longitudinal or transversal) used for flow measurement is indicated. Take into consideration for the measuring task that the sound velocity depends on the composition and the processing of the material. The sound velocity of alloys and cast materials will fluctuate over a certain range. The values give a rough orientation.
Material c trans [m/s]
clong
[m/s]
cflow
Material c trans [m/s]
clong [m/s]
cflow
[m/s]
Aluminium 3100 6300 trans Platinum 1670 trans
Asbestos cement
2200 trans Polyethylene 925 trans
Bitumen 2500 trans Polystyrene 1150 trans
Brass 2100 4300 trans PP 2600 trans
Steel (normal) 3230 5800 trans PVC 2395 long
Copper 2260 4700 trans PVC (hard) 948 trans
Cu-Ni-Fe 2510 trans PVDF 760 2050 long.
Ductile iron 2650 trans Quartz glass 3515 trans
Glass 3400 4700 trans Rubber 1900 2400 trans
Grey cast iron 2650 4600 trans Silver 1590 trans
Pipe 700 2200 long Sintimid 2472 long
PE 1950 long Stainless steel
3230 5790 trans
Perspex 1250 2730 long Teka PEEK 2537 long
PFA 1185 long Tekason 2230 long
Plastics 1120 2000 long Titanium 3067 5955 trans
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17.4 Typical Roughness Coefficients of Pipes The values are based on experience and measurements.
Material Absolute roughness [ µµµµm]
Material Absolute roughness [ µµµµm]
drawn pipes of non-ferrous metal, glass, plastics and light metal
0
...
1.5
Cast iron pipes:
drawn steel pipes 10 ... 50 • bitumen lining 120 ...
fine-planed, polished surface bis zu
...
10
• new, without lining 250 ... 1000
planed surface 10 ... 40 • rusted 1000 ... 1500
rough-planed surface 50 ... 100 • encrusted 1500 ... 3000
welded steel pipes, new 50 ... 100
long usage, cleaned 150
...
200
lightly and evenly rusted bis zu ... 400
heavily encrusted bis zu ... 3,000
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17.5 Properties of Water at 1 bar and at Saturation Pressure
T (°C) p (bar) ρρρρ (kg m -3) cP (kJ kg -1 K-1)
0 1 999.8 4.218
10 1 999.7 4.192
20 1 998.3 4.182
30 1 995.7 4.178
40 1 992.3 4.178
50 1 988.0 4.181
60 1 983.2 4.184
70 1 977.7 4.190
80 1 971.6 4.196
90 1 965.2 4.205
100 1.013 958.1 4.216
120 1.985 942.9 4.245
140 3.614 925.8 4.285
160 6.181 907.3 4.339
180 10.027 886.9 4.408
200 15.55 864.7 4.497
220 23.20 840.3 4.613
240 33.48 813.6 4.769
260 46.94 784.0 4.983
280 64.20 750.5 5.290
300 85.93 712.2 5.762
320 112.89 666.9 6.565
340 146.05 610.2 8.233
360 186.75 527.5 14.58
374.15 221.20 315.5 ∞ T Medium temperature
p Medium pressure
ρ Density
cp Specific heat at constant pressure
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