User’s Model ISC450G Manual...IM 12D06D05-01E vi CE marking products n Authorized Representative in EEA The AuthorizedRepresentativefor this product in EEA is YokogawaEurope B.V.

IM 12D06D05-01E6th Edition

User’sManual Model ISC450GInductive Conductivity

Converter[Style: S2]

Enter

Measurement setup

Temperature settings Temp. Compensation Calibration settings Concentration

Measure Conductivity only Configure sensor

Commissioning

NOTEThis page may be referred to when reading pages where subsequent submenu screens are shown in the text. Connection to the relevant submenu screen is indicated by a dotted line with an arrow.Note that screens in the text are typical examples and actual screens may differ depending on the set parameters.

Connection to the relevant submenu screen is indicated by a dotted line with an arrow.

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PREFACEThank you for purchasing the ISC450G Inductive Conductivity Converter.Please read the following respective documents before installing and using the ISC450G Inductive Conductivity Converter.

The related documents are as follows. GeneralSpecifications: GS12D06D05-01E User’sManual: IM12D06D05-01E(thismanual)* the “E” in the document number is the language code.

AnexclusiveUser’sManualmightbeattachedtotheproductswhosesuffixcodesoroptioncodescontainthecode“Z”(madetocustomers’specifications).Pleasereaditalongwiththis manual.

WARNINGElectrostatic dischargeThe ISC450G converter contains devices that can be damaged by electrostatic discharge.When servicing this equipment, please observe proper procedures to prevent such damage.Replacement components should be shipped in conductive packaging. Repair work should be done at grounded workstations using grounded soldering irons and wrist straps to avoid electrostatic discharge.

WARNINGInstallation and wiringThe ISC450G converter should only be used with equipment that meets the relevant IEC, American or Canadian standards. Yokogawa accepts no responsibility for the misuse of this unit.

CAUTIONThe Instrument is packed carefully with shock absorbing materials, nevertheless, the instrument may be damaged or broken if subjected to strong shock, such as if the instrument is dropped. Handle with care.

No.IM12D06D05-01E 6thEdition:Nov.2017(YK)AllRightsReserved.Copyright©2007,YokogawaElectricCorporation

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CAUTION• Donotuseanabrasiveororganicsolventincleaningtheinstrument.• DonotmodifytheISC450Gconverter.• SubstitutionofcomponentsmayimpairsuitabilityforDivision2. Do not remove or replace while circuit is live unless area is known to be non-

hazardous. Explosion Hazard – Do not disconnect equipment unless area is known to be

nonhazardous. Do not reset circuit breaker unless power has been removed from the equipment or

the area is known to be non-hazardous.

n Notice• Thismanualshouldbepassedontotheenduser.• Thecontentsofthismanualaresubjecttochangewithoutpriornotice.• Thecontentsofthismanualshallnotbereproducedorcopied,inpartorinwhole,

without permission.• Thismanualexplainsthefunctionscontainedinthisproduct,butdoesnotwarrantthat

they are suitable the particular purpose of the user.• Everyefforthasbeenmadetoensureaccuracyinthepreparationofthismanual. However, when you realize mistaken expressions or omissions, please contact the

nearestYokogawaElectricrepresentativeorsalesoffice.• Thismanualdoesnotcoverthespecialspecifications.Thismanualmaybeleft

unchanged on any change of specification, construction or parts when the change does not affect the functions or performance of the product.

• Iftheproductisnotusedinamannerspecifiedinthismanual,thesafetyofthisproduct may be impaired.

Yokogawa is not responsible for damage to the instrument, poor performance of the instrumentorlossesresultingfromsuch,iftheproblemsarecausedby:• Improperoperationbytheuser.• Useoftheinstrumentinimproperapplications• Useoftheinstrumentinanimproperenvironmentorimproperutilityprogram• Repairormodificationoftherelatedinstrumentbyanengineernotauthorizedby

Yokogawa.

n SafetyandModificationPrecautionsFollow the safety precautions in this manual when using the product to ensure protection and safety of the human body, the product and the system containing the product.

n Warranty and serviceYokogawa products and parts are guaranteed free from defects in workmanship and materialundernormaluseandserviceforaperiodof(typically)12monthsfromthedateofshipment from the manufacturer. Individual sales organizations can deviate from the typical warranty period, and the conditions of sale relating to the original purchase order should be consulted. Damage caused by wear and tear, inadequate maintenance, corrosion, or by the effects of chemical processes are excluded from this warranty coverage.

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Intheeventofwarrantyclaim,thedefectivegoodsshouldbesent(freightpaid)tothe service department of the relevant sales organization for repair or replacement (atYokogawadiscretion).Thefollowinginformationmustbeincludedintheletteraccompanyingthereturnedgoods:• Part number, model code and serial number• Originalpurchaseorderanddate• Lengthoftimeinserviceandadescriptionoftheprocess• Descriptionofthefault,andthecircumstancesoffailure• Process/environmentalconditionsthatmayberelatedtothefailureofthedevice.• Astatementwhetherwarrantyornon-warrantyserviceisrequested• Completeshippingandbillinginstructionsforreturnofmaterial,plusthenameand

phone number of a contact person who can be reached for further information.

Returnedgoodsthathavebeenincontactwithprocessfluidsmustbedecontaminated/disinfected before shipment. Goods should carry a certificate to this effect, for the health and safety of our employees. Material safety data sheets should also be included for all components of the processes to which the equipment has been exposed.

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Safety Precautionsn Safety,Protection,andModificationoftheProduct

• Inordertoprotectthesystemcontrolledbytheproductandtheproductitselfandensure safe operation, observe the safety precautions described in this user’s manual. We assume no liability for safety if users fail to observe these instructions when operating the product.

• Ifthisinstrumentisusedinamannernotspecifiedinthisuser’smanual,theprotectionprovided by this instrument may be impaired.

• Ifanyprotectionorsafetycircuitisrequiredforthesystemcontrolledbytheproductorfor the product itself, prepare it separately.

• BesuretousethesparepartsapprovedbyYokogawaElectricCorporation(hereaftersimplyreferredtoasYOKOGAWA)whenreplacingpartsorconsumables.

• Modificationoftheproductisstrictlyprohibited.• Thefollowingsafetysymbolsareusedontheproductaswellasinthismanual.

WARNING This symbol indicates that an operator must follow the instructions laid out in this

manual in order to avoid the risks, for the human body, of injury, electric shock, or fatalities. The manual describes what special care the operator must take to avoid such risks.

CAUTION This symbol indicates that the operator must refer to the instructions in this manual

inordertopreventtheinstrument(hardware)orsoftwarefrombeingdamaged,orasystem failure from occurring.

The following are signal words to be found only in our instruction manuals.

CAUTION This symbol gives information essential for understanding the operations and

functions.NOTE This symbol indicates information that complements the present topic.

This symbol indicates Protective Ground Terminal.

This symbol indicates Function Ground Terminal. Do not use this terminal as the protective ground terminal.

Alternating current

Direct current

n Warning and DisclaimerTheproductisprovidedonan“asis”basis.YOKOGAWAshallhaveneitherliabilitynorresponsibility to any person or entity with respect to any direct or indirect loss or damage arisingfromusingtheproductoranydefectoftheproductthatYOKOGAWAcannotpredict in advance.

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n Notes on Handling User’s Manuals• Pleasehandovertheuser’smanualstoyourenduserssothattheycankeepthe

user’s manuals on hand for convenient reference.• Pleasereadtheinformationthoroughlybeforeusingtheproduct.• Thepurposeoftheseuser’smanualsisnottowarrantthattheproductiswellsuitedto

any particular purpose but rather to describe the functional details of the product.• Nopartoftheuser’smanualsmaybetransferredorreproducedwithoutpriorwritten

consentfromYOKOGAWA.• YOKOGAWAreservestherighttomakeimprovementsintheuser’smanualsand

product at any time, without notice or obligation.• Ifyouhaveanyquestions,oryoufindmistakesoromissionsintheuser’smanuals,

please contact our sales representative or your local distributor.

n Drawing ConventionsSomedrawingsmaybepartiallyemphasized,simplified,oromitted,fortheconvenienceofdescription.Some screen images depicted in the user’s manual may have different display positions or charactertypes(e.g.,theupper/lowercase).Alsonotethatsomeoftheimagescontainedin this user’s manual are display examples.

n Product DisposalTheinstrumentshouldbedisposedofinaccordancewithlocalandnationallegislation/regulations.

n Trademark Acknowledgments• Allothercompanyandproductnamesmentionedinthisuser’smanualare

trademarks or registered trademarks of their respective companies.• WedonotuseTMor®marktoindicatethosetrademarksorregisteredtrademarksin

this user’s manual.

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CE marking productsn Authorized Representative in EEA

TheAuthorizedRepresentativeforthisproductinEEAisYokogawaEuropeB.V.(Euroweg2,3825HDAmersfoort,TheNetherlands).

n IdentificationTagThis manual and the identification tag attached on packing box are essential parts of the product.Keepthemtogetherinasafeplaceforfuturereference.

n UsersThis product is designed to be used by a person with specialized knowledge.

n How to dispose the batteries:ThisisanexplanationabouttheEUBatteryDirective.ThisdirectiveisonlyvalidintheEU.Batteriesareincludedinthisproduct.Batteriesincorporatedintothisproductcannotberemoved by yourself. Dispose them together with this product.WhenyoudisposethisproductintheEU,contactyourlocalYokogawaEuropeB.V.office.Do not dispose them as domestic household waste.

Batterytype:Manganesedioxidelithiumbattery

Notice: Thesymbol(seeabove)meanstheyshallbesortedoutandcollectedasordainedintheEUBatteryDirective.

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Model ISC450GInductive Conductivity Converter [Style: S2]

IM 12D06D05-01E 6th Edition

CONTENTSPREFACE ................................................................................................... iSafety Precautions ................................................................................. ivCE marking products .............................................................................vi1. INTRODUCTION AND GENERAL DESCRIPTION .......................1-1

1.1 Instrument check ..............................................................................1-11.2 Application .........................................................................................1-2

2. GENERAL SPECIFICATIONS ........................................................2-13. INSTALLATION AND WIRING ........................................................3-1

3.1 Installation and dimensions ............................................................3-13.1.1 Installation site .............................................................................................3-13.1.2 Mounting methods .......................................................................................3-1

3.2 Wiring .................................................................................................3-43.2.1 Preparation ..................................................................................................3-43.2.2 Cables, Terminals, glands and conduit adapter ..........................................3-5

3.3 Wiring the power supply ..................................................................3-73.3.1 General precautions ....................................................................................3-73.3.2 Access to terminal and cable entry ..............................................................3-83.3.3 AC power .....................................................................................................3-83.3.4 DC power .....................................................................................................3-83.3.5 Grounding the housing ................................................................................3-93.3.6 Switching on the instrument.........................................................................3-9

3.4 Wiring the contact signals .............................................................3-103.4.1 General precautions ..................................................................................3-103.4.2 Contact outputs ..........................................................................................3-103.4.3 Contact input .............................................................................................. 3-11

3.5 Wiring the mA-output signals ........................................................3-113.5.1 General precautions .................................................................................. 3-113.5.2 Analog output signals ................................................................................ 3-11

3.6 Wiring the sensor system ..............................................................3-113.6.1 General precautions ......................................................................................... 3-113.6.2 Connecting the sensor cable to the converter ........................................... 3-11

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3.6.3 Installation of the sensor ............................................................................3-123.6.4 Sensorcableconnectionsusingjunctionbox(BA10)andextensioncable

(WF10) ..................................................................................................3-13

4. OPERATION ....................................................................................4-14.1 Main display functions .....................................................................4-1

4.2 Trending graphics .....................................................................4-1

4.3 Zoom in on details .....................................................................4-24.3.1 Actual mA1 ...................................................................................................4-24.3.2 Actual mA2 ...................................................................................................4-24.3.3 S1/S2/S3/S4 ................................................................................................4-24.3.4 C.C.(factory) ................................................................................................4-34.3.5 C.C.(adjusted) .............................................................................................4-34.3.6 Temp. comp 1 ..............................................................................................4-34.3.7 Temp.comp2 ..............................................................................................4-34.3.8 Sensor ohms ................................................................................................4-34.3.9 Lastcalibratedat ..........................................................................................4-34.3.10 Calibration due at .........................................................................................4-34.3.11 Projected calibration at ................................................................................4-34.3.12 HART ID .......................................................................................................4-34.3.13 Software revision .........................................................................................4-44.3.14 HART Device revision ..................................................................................4-44.3.15Logbook .......................................................................................................4-4

4.4 Information function .........................................................................4-54.5 Setup-calibration & commissioning ...............................................4-54.6 Secondary-primary value display switch .......................................4-54.7 Navigation of the menu structure ...................................................4-6

5. MENU STRUCTURE COMMISSIONING .......................................5-15.1 Configuresensor ..............................................................................5-15.2 Temperature setting ..........................................................................5-15.3 Temperature compensation .............................................................5-15.4 Calibration settings ..........................................................................5-25.5 Concentration ....................................................................................5-45.6 mA output setup ................................................................................5-45.7 Contact output setup ........................................................................5-85.8 Fail ....................................................................................................5-125.9 Simulate ...........................................................................................5-125.10 Input contacts ..................................................................................5-12

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5.11 Errorconfiguration .........................................................................5-125.12 Logbookconfiguration ...................................................................5-145.13 Advanced setup ..............................................................................5-145.14 Display setup ...................................................................................5-16

6. CALIBRATION ................................................................................6-16.1 Before calibration..............................................................................6-16.2 Cell constant manual ........................................................................6-26.3 Cell constant automatic ...................................................................6-36.4 Air (zero) calibration ........................................................................6-36.5 Sample calibration ............................................................................6-36.6 Temperaturecoefficientcalibration ................................................6-46.7 Temperature calibration ..................................................................6-46.8 Operation of hold function during calibration ...............................6-4

7. MAINTENANCE ..............................................................................7-17.1 Periodic maintenance .......................................................................7-17.2 Periodic maintenance of the sensor ...............................................7-17.3 Cleaning methods .............................................................................7-27.4 LCD adjustment ................................................................................7-2

8. TROUBLESHOOTING ....................................................................8-18.1 Calibration check ..............................................................................8-18.2 Predictive maintenance ....................................................................8-18.3 Poor calibration technique ..............................................................8-28.4 Error displays and actions ...............................................................8-2

APPENDICES .................................................................................. APP-1Appendix 1 Temperature compensation .........................................................APP-1Appendix 2 Temperature compensation matrix. .............................................APP-4Appendix 3 Calibration solutions for conductivity ...........................................APP-5Appendix 4 Measurement principle ................................................................APP-6Appendix5 HARTHHT(275/375)menustructure .........................................APP-7Appendix 6 Control drawing for FM approval............................................... APP-10

Customer Maintenance Parts List ...................... CMPL 12D06D05-02ERevision Record ....................................................................................... i

Blank Page

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1. INTRODUCTION AND GENERAL DESCRIPTION

The Yokogawa ISC450G is a converter designed for industrial process monitoring, measurement and control applications. This instruction manual contains the information needed to install, set up, operate and maintain the unit correctly. This manual also includes a basic troubleshooting guide to answer typical user questions.Yokogawa can not be responsible for the performance of the ISC450G converter if these instructions are not followed.

1.1 Instrument checkUpon delivery, unpack the instrument carefully and inspect it to ensure that it was not damaged during shipment. If damage is found, retain the original packing materials (includingtheouterbox)andthenimmediatelynotifythecarrierandtherelevantYokogawasalesoffice.Makesurethemodelnumberonthenameplateaffixedtothesideoftheinstrumentagreeswith your order. Example of the nameplate is shown below.

Figure 1.1 Nameplate

NOTE• Thenameplatewillalsocontaintheserialnumberandanyrelevantcertification

marks.Besuretoapplycorrectpowertotheunit,asdetailedonthenameplate.• Referto“ControldrawingforFMapproval”ofAppendix4incaseofOptioncodeis“-U

(FMversion)”ofModelandSuffixCodes.• Whencontactoutputcurrentismorethan4Amps.ambienttemperatureshouldbe

less than 40ºC.

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1.2 ApplicationThe ISC450G converter is intended to be used for continuous on-line measurement of Conductivityand/orConcentrationinindustrialinstallations.Theunitcombinessimpleoperation and microprocessor-based performance with advanced self-diagnostics and enhanced communications capability to meet the most advanced requirements. The measurement can be used as part of an automated process control system. It can also be used to indicate operating limits of a process, to monitor product quality, or to function as a controllerforadosing/dilutionsystem.Sensors should normally be mounted close to the converter in order to ensure easy calibration and peak performance. If the unit must be mounted remotely from the sensors, WF10extensioncablecanbeused,uptoamaximumof50metres(150feet),withaBA10junction box, and up 10 metres standard sensor cable.The ISC450G is delivered with a general purpose default setting for programmable items (seeChapter5).Whilethisinitialconfigurationallowseasystart-up,theconfigurationshould be adjusted to suit each particular application. An example of an adjustable item is the type of temperature sensor used. The ISC450G can be adjusted for a number of different types of temperature sensors.Details provided in this instruction manual are sufficient to operate the ISC450G with all Yokogawa sensor systems and a wide range of third-party commercially available probes. For best results, read this manual in conjunction with the corresponding sensor instruction manual.Yokogawa designed the ISC450G converter to withstand industrial environments. It meets alltheCEregulatorystandards.Theunitmeetsorexceedsstringentrequirements(seeChapter2)withoutcompromise,toassuretheuserofcontinuedaccurateperformanceineven the most demanding industrial installations.

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2. GENERAL SPECIFICATIONSInputspecifications: Compatible with the Yokogawa inductive conductivity ISC40 series with

integratedtemperaturesensor:NTC30korPt1000.Input ranges: Conductivity: 0to1999mS/cmat25ºC(77°F) Minimum:1μS/cm(atprocesstemperature) Maximum:2S/cm(atprocesstemperature) Temperature: -20to+140ºC(0to280ºF). Cablelength: max.60meters(200feet)

10meters(35feet)fixedsensorcable+50meters(165feet)WF10extensioncable.InfluenceofcablecanbeadjustedbydoinganAIRCALwiththecableconnectedtoadrycell.

Accuracy: Conductivity: ≤0.5%ofreading±1.0μS/cm Temperature: ≤0.3ºC(0.6ºF) Temp.compensation:≤1%forNaCl,≤3%formatrix Stepresponse: ≤4secondsfor90%(fora2decadestep).Noteonperformancespecifications The following tolerance is added to above performance. mAoutputtolerance:±0.02mAof“4-20mA”Transmission signals: General; Two isolated outputs of 4-20 mA. DC with common

negative.Maximumload600Ω.Bi-directionalHART® digital communication,superimposedonmA1(4-20mA)signal.

Outputfunction; Linearor21-steptableforConductivity,ConcentrationorTemperature.

Control function; PID control Burnoutfunction; Burnup(21.0mA)orburndown(3.6mA)tosignalfailureacc.

NAMUR NE43. Parameters; Adjustable damping

Expire time Hold; ThemA-outputsarefrozentothelast/fixedvalueduring

calibration/commissioning. Cond.range; minspan10μs/cm≥10%ofhighvalue(20mA)

maxspan1999mS/cmContact outputs: General; Four SPDT relay contacts with display indicators. Switchcapacity; Maximumvalues100VA,250VAC,5Amps.(*1) Maximumvalues50Watts,250VDC,5Amps.(*1) Status; High/Lowprocessalarms,selectedfromconductivity

concentration or temperature. Configurabledelaytimeandhysteresis. PID duty cycle or pulsed frequency control. FAILalarm

Controlfunction; On/Off Adjustable damping Expire time

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Hold; Contact can be used to signal the Hold situation. Fail safe; Contact S4 is programmed as failsafe contact.*1: Whencontactoutputcurrentismorethan4Amps,ambienttemperatureshouldbelessthan40

ºC.Contact input: Remote range switching to 10 times the programmed range. Contactopen; Ifimpedance>100kΩ:1xRange (WhenprogrammedrangeformAoutputisconductivity). Contactclosed; Ifimpedance<10Ω:10xRangeTemperature compensation: Function; Automaticormanual,fortemperaturerangesmentionedunderB

(inputs). Referencetemp.; programmablefrom0to100ºCor30to210°F(default25ºC).Calibration: Semi-automaticcalibrationusingpre-configuredOIML(*1)(KCl)stanard

tables, with automatic stability check. Manual adjustment to grab sample.*1: OrganisationInternationaledeMetrologieLegale,internationalrecommendationnr.56

standard solutions reproducing the conductivities of electrolytes, 1981.Logbook: Software record of important events and diagnostic data readily available in

the display or through HART®.Display: GraphicalQuarterVGA(320x240pixels)LCDwithLEDbacklightand

touchscreen. Plain language messages in English, German, French, Spanish, Italian, Swedish, Portuguese and Japanese.

Form: Dimension; 144(W)x144(H)xApprox.144(D)mm Converter weight; Approx. 1.5 kgHousing: Cast Aluminum housing with chemically resistant coating; PolycarbonatecoverwithPolycarbonateflexiblewindow ProtectionIP66/NEMA4X/CSAType3S Colour; Silver grey ISC450G-A(D)-A: IP66cableglandsaresuppliedwiththeunit ISC450G-A(D)-U: NEMA4Xcloseupplugsaremountedintheunusedcableentry

holes and can be replaced by conduit fittings as required Pipe, Panel or Wall mounting using optional hardware

Optionalconduitadapter; G1/2,1/2NPTorM20femalePower supply: ISC450G-A: Ratings; 100-240VAC Acceptablerange; 90to264VAC Ratings; 50/60Hz Acceptablerange; 50Hz±5%,60Hz±5% Power Consumption; 15VA ISC450G-D: Ratings; 12-24VDC Acceptablerange; 10.8to26.4VDC Power Consumption; 10 W

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Safety, EMC and RoHS conforming standards Safety: EN61010-1 EN 61010-2-030 EN 61010-2-201 CAN/CSAC22.2No.61010-1 CAN/CSAC22.2No.61010-2-030 CAN/CSAIEC61010-2-201 UL61010-1 UL61010-2-030 UL61010-2-201 EMC: EN61326-1ClassA,Table2*1 EN 61326-2-3 EN 61000-3-2 Class A EN 61000-3-3 RCM:EN61326-1ClassA KoreaElectromagneticConformityStandard

*1: Influenceofimmunityenvironment(CriteriaA):Outputshiftisspecifiedwithin±35%ofF.S.Note: ThisinstrumentisaClassAproduct,anditisdesignedforuseintheindustrialenvironment.

Please use this instrument in the industrial environment only. RoHS: EN50581 FMnonincendiveapproval(suffixcodeType:-U): FM3611ClassI,Div.2,GroupABCD,T6forTa-20to55ºC Installationaltitude:2000morless CategorybasedonIEC61010:II(Note) PollutiondegreebasedonIEC61010:2(Note)Note: Installationcategory,calledover-voltagecategory,specifiesimpulsewithstandvoltage.Category

II is for electrical equipment. Pollution degree indicates the degree of existence of solid, liquid, gas or other inclusions which may reduce dielectric strength. Degree 2 is the normal indoor environment.

Environment and operational conditions: Ambient temperature; -20to+55ºC(-5-130ºF) Storage temperature; -30to+70ºC(-20-160ºF) Humidity; 10to90%RHat40ºC(100ºF)(non-condensing) Dataprotection; EEPROMforconfigurationdataandlogbook.Lithiumcellfor

clock. Watchdog timer; Checks microprocessor Power down; Reset to measurement. Automatic safeguard; Auto return to measuring mode when touchscreen is untouched

for 10 min.

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ModelandSuffixCodes[Style: S2]

Model Suffixcode Option code DescriptionISC450G ---------------- ----------------- Inductive Conductivity Converter

Power - A- D

----------------------------------

ACversion(100…240VAC)DCversion(12…24VDC)

Type - A- U

----------------------------------

General purpose versionFMversion(*3)

Mounting Hardware

HoodConduit adapter

Tag Plate

/UM/U/PM/H5/AFTG/ANSI/AM20/SCT

Universalmountingkit(panel,pipe,wall)Pipeandwallmountinghardware(*2)Panel mounting hardware (*2)Awninghood(stainlesssteel)(*2)G1/2(*2)1/2NPT(*2)M20(*2)Stainlesssteeltagplate(*1)

Notes: *1 Ifthetagnumberispredefinedwiththepurchase,Yokogawawillinscriptthetagplatewiththespecifiedtagnumber, and program the tag number in the converter.

*2 Optioncodes/U,/PM,/H5,/AFTG,/ANSIand/AM20arenotspecifiedforFMversion(-U). *3 Nonincendive for FM only.

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3. INSTALLATION AND WIRING3.1 Installation and dimensions

3.1.1 Installation siteThe ISC450G converter is weatherproof and can be installed inside or outside. It should, however, be installed as close as possible to the sensor to avoid long cable runs between sensorandconverter.Inanycase,thecablelengthshouldnotexceed60metres(200feet).Selectaninstallationsitewhere:• Mechanicalvibrationsandshocksarenegligible• Norelay/powerswitchesareinthedirectenvironment• Accessispossibletothecableglands(seefigure3.1)• Theconverterisnotmountedindirectsunlightorsevereweatherconditions• Maintenanceproceduresarepossible(avoidingcorrosiveenvironments)

The ambient temperature and humidity of the installation environment must be within the limitsoftheinstrumentspecifications.(Seechapter2).

3.1.2 Mounting methodsRefer to figures 3.2 and 3.3. Note that the ISC450G converter has universal mounting capabilities:• Panelmountingusingoptionalbrackets• Surfacemountingonaplate(usingboltsfromtheback)• Wallmountingonabracket(forexample,onasolidwall)• PipemountingusingabracketonahorizontalorverticalpipeSizenominal50A

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Unit: mm (inch)

220(8.66")184(7.2")

72(2.8")

A

D E F

B C A : For output signalB : For contact inputC : For sensor cableD : For contact output (S1 and S2)E : For contact output (S3 and S4)F : For power supply

Adapter49

(1.93")

G1/2 screw (/AFTG), 1/2 NPT screw (/ANSI) M20 screw (/AM20)

Approx.55(2.2")

144(5.67")

144(

5.67

")

20(0.79")

20(0.79")

121.

5(4.

78")

24.5

(1")

Adapter for Conduit Work (optional) (option code : / AFTG, / ANSI, / AM20)

4x M6 screwdepth 7

M20 cable gland(When shipped, not installed)

Grounding terminal (M4 screw)

Hood (Option code: /H5, some cutout on the left side cover)

Figure 3.1 Housing dimensions and layout of glands

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Unit: mm (inch)min.185 (7.25")

min

.195

(7.7

5")

138(5.43")

138(5.43")

M6

M6

M5

138(5.43")

+1 0

138

(5.4

3")

+1 0

Figure 3.2 Option /PM: panel mounting diagramNote: Whenoptioncode“/UM”isspecified,universalpipe/wall/panelmountingkitaresupplied---same

asoptioncode“/U”and“/PM”bothspecified.

2" ND. pipe

pipe mounting(horizontal)

pipe mounting(vertical)

wall mounting

15(0.6")

35(1.38")

13(0.51")

4x Ф6.5(0.26")

4x Ф10(0.4")

200(7.87")

70(2.75")

154.5(6.08")

80(3.15")

80(3.15")

Figure 3.3 Option /U: wall and pipe mounting diagram

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6 X M20 glands

potentio-merter

LCDbracket

connector for (future) softwareinputterminalblock

outputterminalblock

protectiveshieldbracket

Note: This connector for software must be used only by Yokogawa’ s service personnel.

Note: ISC450G-A(D)-U The enclosure is provided with stoppers instead of M20 cable glands for the unused holes. These

stoppers must be removed and replaced by FM approved conduit fittings in accordance with good installation practice. Also see Appendix 6, Control drawing for FM approval.

Figure 3.4 Internal view of ISC450G wiring compartment

3.2 Wiring

3.2.1 PreparationRefer to figure 3.4. The relay contact terminals and power supply connections are under thescreening(shielding)plate.Theseshouldbeconnectedfirst.Connectthesensor,outputs and HART® communication connections last.

ToopentheISC450Gforwiring:1. Loosenthefourfrontplatescrewsandswingopenthecover.2. The upper terminal strip is now visible.3. Removethescreen(shield)platecoveringthelowerterminalstrip.4. Connect the power supply and contact outputs. Use the three glands at the back for

these cables.

WARNING• Cablesthatwithstandtemperaturesofatleast75°Cshouldbeusedforwiring.• WiringworkshouldbeperformedtomeetIP66orhigherrequirements.Tightenfour

front plate screws to 1.5 N·m torque.• UsecablesthatcomplywithUL2556VW-1orequivalent.

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WARNINGAlways place the screen plate over the power supply and contact terminals for safety reasons and to avoid interference.

5. Putback(replace)thescreen(shield)plateoverthelowerterminals.6. Connecttheanalogoutput(s),thesensorinputs,and,ifnecessary,theHART® wiring

and input contact.7. Usethefrontthreeglandsforanalogoutput,sensorinputs,contactinputandHART®

wiring(seefigure3.5).8. Swing back the cover and secure it with the four screws.9. Switch on the power. Commission the instrument as required or use the default

settings.

CAUTIONDo not turn on power with the touchcsreen pressed, otherwise inaccurate screen positioning will occur. If it occurs, leave the touchscreen unpressed, turn off power then on again. The screen positioning will be accurate.

3.2.2 Cables, Terminals, glands and conduit adapterISC450G-A(D)-ATheISC450Gissuppliedwithterminalssuitablefortheconnectionoffinishedwiresinthesizerangeof0.13to2.5sq.mm.(26to14AWG).Thecableglandssuppliedwillformatightsealoncableswithanoutsidediameterof6to12mm(0.24to0.47inches).Unusedcable entry holes must be sealed with cable glands including the close up plugs supplied.ISC450G-A(D)-UTheISC450Gissuppliedwithterminalssuitablefortheconnectionoffinishedwiresinthesizerangeof14-26AWG.ThecableentryholesaresealedwithFMcertifiedplugs.Priortocableentrytheplugscanberemovedwithallenkeysize3/8”Thecableconduitfittingscan be mounted in the holes of the housing as required. The cable glands supplied with the unitwillgiveatightsealoncableswithoutsidediameterof0.24to0.47inches.

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High voltage section

Contact(S1, S2)outputcables

mAcables

Contact(S3, S4)outputcables

SensorCables

Inputcontact

Powercable

Suitable for cables with an outside diameter between 6 - 12 mm (0.24 - 0.47”)

Figure 3.5a Cable glands diagram

Gland nut

O-ring

Gland

Close up plug

Contents:

6 X Gland M206 X Close up plug6 X Gland nut M206 X O-ring 17.12 X 2.62 EPDM 70° sh.

NOTE: The glands must be installed properly to meet IP66 and NEMA 4X rating. Use close up plug for unused glands.

NOTE: Moisturize O-ring before assembling.

Figure 3.5b How to install cable glands

l Adapter for conduit workWhen protect the cable with a conduit, replace the M20 cable gland with a cable gland of optional conduit adapter, and set the adapter shown as Figure 3.5c.

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Adapter

49(1.93")

G1/2 screw (/AFTG), 1/2 NPT screw (/ANSI)M20 screw (/AM20)

Approx.55(2.2")

Packing

Unit: mm(inch)Nut

Figure 3.5c Conduit adapter

S1

S2

S4

S3

FRONT GLANDS REAR GLANDS

Sensor

outputsignals

HART

Contactoutput

Contactoutput

Power

Contact input

mA1

mA2

Figure3.6 Systemconfiguration

3.3 Wiring the power supply

3.3.1 General precautions

NOTEMake sure the power supply is switched off. Also, make sure that the power supply is correct for the specifications of the ISC450G and that the supply agrees with the voltage specifiedonthetextplate.

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WARNING• Installanexternalswitchorcircuitbreakertothepowersupplyoftheconverter.• Useanexternalswitchorcircuitbreakerrated5AandconformingtoIEC60947-1or

IEC60947-3.• Itisrecommendedthattheexternalswitchorcircuitbreakerbeinstalledinthesame

room as the converter.• Theexternalswitchorcircuitbreakershouldbeinstalledwithinreachoftheoperator

andidentifiedwithmarkingasapowersupplyswitchtotheconverter.• Powerlinessuchaspowercablesandcontactoutputsshouldbefixedsecurely

onto a wall or construction using cable racks, conduit tubing, nylon bands or other appropriate ways. Accidental removal from terminals by pulling may result in electric shock.

Localhealthandsafetyregulationsmayrequireanexternalcircuitbreakertobeinstalled.The instrument is protected internally by a fuse. The fuse rating is dependent on the supply totheinstrument.The250VACfusesshouldbeofthe“time-lag”type,conformingtoIEC127.

WARNINGFusereplacementshouldbeperformedonlybyaqualifiedservicepersonnel.See Chapter 7.MAINTENANCE,Fuse.

Fuse ratings: Power supply Fuse type 12-24VDC,10Wmax 2A/250V,Slow 100-240VAC,15VAmax 0.5A/250V,Slow

3.3.2 Access to terminal and cable entryTerminals 1 and 2 are used for the power supply.Guide the power cables through the gland closed to the power supply terminals. The terminals will accept wires of 2.5 mm2(14AWG).Alwaysusecablefinishingsifpossible.

3.3.3 AC powerConnectterminalLtothephaselineoftheACpowerandterminalNtothezeroline.Seefigure3.8forthepowerground.Thisisseparatedfrominputgroundbyagalvanicisolation.Shouldbeusedthecablebeyond300VAC.

3.3.4 DC powerConnect terminal 1 to the positive outlet and terminal 2 to the negative outlet.Shouldbeusedthecablebeyond30VAC.This is separated from input ground by a galvanic isolation. The size of conductors should be at least 1.25 mm2. The overall cable diameter should be between 6 and 12 mm.

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2 1- +

DC

POWER12-24 V /10 WFUSE: 2A/250 VAC/T

2 1N L

AC

POWER100-240 VAC/15 VA/ 50/60HzFUSE: 500 mA/250 VAC/T

63 66 65 61 22 21 12 16 15- + - +

mA OUTPUTS

62 11 17

TEMPmA2SHLD

CONTACT SENSOR(S)REFER TO INSTRUCTION MANUAL FOR CONNECTIONS ISC

mA1(+HART)

14

COILSRECEIVE DRIVESHLD+ -

13

Figure 3.7 Input and output connections

3.3.5 Grounding the housing

NOTEFor the safety of the user and to protect the instrument against interference, the housing must always be connected to ground. This has to be done by a large area conductor. This cable can be fixed to the rear of the housing or by using the internal ground connections usingabraidedwirecable.Seefigure3.8.

WARNINGTheminimumcrosssectionalareaoftheprotectivegroundingwireshouldbe0.75mm2.

3.3.6 Switching on the instrumentAfter all connections are made and checked, the power can be switched on from the power supply.MakesuretheLCDdisplaycomeson.After a brief interval, the display will change to the measured value. If errors are displayed oravalidmeasuredvalueisnotshown,consultthetroubleshootingsection(Chapter8)before calling Yokogawa.

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(M4 screw)

2N

1L

POWER100-240 VAC/15 VA/ 50/60HzFUSE: 500 mA/250 VAC/T

AC

(M4 screw)

Figure3.8aExternalgrounding Figure3.8bInternalgrounding

3.4 Wiring the contact signals

3.4.1 General precautionsThe contact output signals consist of voltage-free relay contacts for switching electrical appliances(SPDT).Theycanalsobeusedasdigitaloutputstosignalprocessingequipment(suchasacontrollerorPLC).Itispossibletousemulti-corecablesforthecontact in and output signals and shielded multi-core cable for the analog signals.

3.4.2 Contact outputsTheISC450Gunit’sfourcontacts(switches)thatcanbewiredandconfiguredtosuituserrequirements.ContactS4isprogrammedasafail-safecontact.Pleaserefertosection5.7,Contact output setup for functionality description.

l Alarm (limits monitoring)Contactsconfiguredas“ALARM”canbeenergizedwhenlimitsarecrossed.

l FailContactsconfiguredas“FAIL”willbeenergizedwhenafailsituationoccurs.Somefailsituationsareautomaticallysignaledbytheinternaldiagnostics(electronics)oftheconverter.Otherscanbeconfiguredbytheuser(seesection5.11ErrorConfiguration).Bypressingthe“INFO”buttononthemainscreentheuserisgivenanexplanationaswellasa remedy for the current fail situation.Always connect the fail contact to an alarm device such as a warning light, alarm bell or displayed on an annunciator.

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“ALARM” Contact “FAIL” ContactPowerOff NC NCPowerOn NC NCAlarm NO NCFail NC NOFail and Alarm NC * NOHOLD NC NC* When a fail situation occurs which is related to the parameter associated with the contact

(Conductivity,Concentrationortemperature)thecontactwillgotoNC.Whenthefailsituationisnot related to the parameter associated with the contact the contact will remain in the state it is currently in.

Bebeyond300VACandpleaseuseacableoftheelectriccurrentcapacityaccordingtothe load connected to contact output.

3.4.3 Contact inputItisnecessarytousescreening/shieldingontheinputsignalcables.Terminal63isusedtoconnect the shielding.

3.5 Wiring the mA-output signals

3.5.1 General precautionsThe analog output signals of the ISC450G transmit low power standard industry signals to peripheralslikecontrolsystemsorstrip-chartrecorders(Figure3.6).

3.5.2 Analog output signalsThe output signals consist of active current signals of 4-20 mA. The maximum load can be 600ohmsoneach.Shouldbeusedthecablebeyond30VAC.Itisnecessarytousescreening/shieldingontheoutputsignalcables.Terminal63isusedto connect the shielding.

3.6 Wiring the sensor system

3.6.1 General precautionsThe sensor cable transmits low voltage, high frequency signals and should be installed separatelyfromanyhighvoltage,highcurrentand/orpowerswitchingcables.Thisisto avoid any unintentional cross talk or other kind of interference of the conductivity measurement.

3.6.2 Connecting the sensor cable to the converter1. To access terminals remove the front cov er of the ISC450G by releasing the 4 captive

screws.2. Loosenthecableglandandpullthecableintheconnectioncompartment.

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3. The sensor leads are numbered and the leads must be connected to the terminals withthecorrespondingnumber,refertoFigure3.4:thetemperaturecompensatorwith11/12

-thedrivecoilwith15/16 -thereceivecoilwith13/17 Terminal 14 is for connection of the shield.4. ScrewthecableglandtighttoensureIP66(NEMA4X)environmentalprotection.

Anoptionalprotectionhose(flexibleconduit)isavailableforadditionalmechanicalprotection of the sensor cable.

3.6.3 Installation of the sensorTheModelISC40isa“doughnut”shapedsensor.Preferably,theprocesswillflowthroughthe hole of the donut with the temperature compensator up-stream. For minimal obstruction of the flow and for accurate measurement without the need for calibration of the cell constant,theprocesswillflowfreelyaroundthedoughnut,allowingaminimumdistanceof25mm(1”)betweendoughnutandprocesspiping(d).The sensor is provided with a gasket and retaining nut. This allows “bulkhead mounting” in tankwallorstandardflangethroughaholeof27mm(1.1”)diameter(A).Theinsertionis125mmundertheflange.Twoflatsareprovidedwithwrenchsize20mm(0.8”)toalloweasymountingandalignmentofthesensor.Themodelidentificationononeflatalignswiththe“up-stream”positionofthesensor.ForOn-linemountingadaptersareavailableforstandard2”processconnection(Gasthread,NPT,ANSI-flange,DIN-flange).For by-pass measurement flow fittings are available in polyporpylene, polyvinylidene flourideandStainlessSteel.FormeasurementsinopenductsorvesselsanimmersionfittinginCPVCorStainlessSteel is available.Foreasywiringthesensormustbelocatedwithin5m(15”)fromtheconverterusingtheintegral sensor cabling.

Figure 3.9a Dimensions

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Ø 40 ( 1.57)

wrench opening 20 ( 0.79 )wrench opening 32 ( 1.42 )

thermistor

ground

secondary

primary

YOKOGAWA

G3/4

47(1.85)

11121713151614

L= 5000 ( 200 )

ca 2

40 (9

.45) 4

0 (1

.57)

100

(3.9

4)Hole in flangeØ 27 mm (1.06")

D

d

I

t

d = distance min 25 mm (1")D = acces port size min 48 mm (1.89")

DIMENSIONS INSTALLATION INSTRUCTIONS BULK-HEAD MOUNTING

UNIT: mm (inch)

Figure 3.9b Dimensions

3.6.4 Sensorcableconnectionsusingjunctionbox(BA10)andextensioncable(WF10)

Where a convenient installation is not possible using the standard cables between sensors andconverter,ajunctionboxandextensioncablemaybeused.TheYokogawaBA10junction box and the WF10 extension cable should be used. These items are manufactured to a very high standard and are necessary to ensure that the specifications of the system can be met.Thetotalcablelengthshouldnotexceed60metres(e.g.5mfixedcableand55mextensioncable).

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14 Overall Screen

1112

12

1314

1416

15

1314

1416

15

17

1117

11 Red12 Blue

13 Core 17 ScreenBrown Co-axial Cable

15 Core 16 ScreenWhite Co-axial cable

17 (screen)

14 (overall screen)12 (blue)

11 (red)

13 (core)

16 (screen)

15 (core)Co-axial cable(white)

Co-axial cable(brown)

11121314151617

BA10 WF10 EXA CONVERTER

11

12

13

14

15

16

17

Figure3.10ConnectionofWF10extensioncableandBA10junctionbox

Extensioncablemaybepurchasedinbulkquantitiesorinpre-finishedlengths.Inthecaseof bulk quantities cut to length, then it is necessary to terminate the cable as shown below.Termination procedure for WF10 cable.1. Slide3cmofheatshrinktube(9x1.5)overthecableendtobeterminated.2. Strip9cmoftheouter(black)insulatingmaterial,takingcarenottocutordamage

internal cores.3. Remove loose copper screening, and cut off the cotton packing threads as short as

possible.4. Strip insulation from the last 3 cm of the brown, and the white coaxial cores.5. Extractthecoaxialcoresfromthebraid,andtrimofftheblack(low-noise)screening

material as short as possible.6. Insulate the overall screen and the 2 coaxial screens with suitable plastic tubing.7. Stripandterminateallendswithsuitable(crimp)terminalsandidentifywithnumbers

as shown.8. Finally shrink the overall heat shrink tube into position.

3 cmheat shrink

9 cmremove insulation

Figure 3.11a

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Figure 3.11b

111217

15161314

Figure 3.11c

Blank Page

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4. OPERATION4.1 Main display functions

Go to trend screen Go to zoom screenGo to status screen

Go to maintenance screen

Tag:EXAxt ISC450

3.76025.0

mS/cm

16.64

+

Figure 4.1 Main Display

A heart “ ” mark is lit on the right-upper corner of the screen when HART communication isactive.An“Χ”markislitwhenHARTcommunicationisabnormal.Nothing appears when HART communication is not used.Notethatthe“Χ”markmayappearduetooutputsignalnoiseorthelikeevenwhenHARTcommunication is not used. There is no problem when HART communication is not used. Continue operation while ignoring the mark.

4.2 Trending graphics Pressing the button changes the display into a graphical mode in which the average measuredvalueisshownonatimescale.The“Live”valueisalsodigitallydisplayedinatextbox.Thetimescale(X-axis)andtheprimaryvaluescale(Y-axis)aresetinthe“DISPLAYSETUP”menu.Thefullscreendisplaysatrendof51pointsthatrepresenttheaverage of the selected time interval. The converter samples the measurement every second. The trending graphic also shows the maximum and minimum measured value in that interval.For example if the time scale is set to 4 hours, then the trend is shown for 4 hours prior to the actual measurement. Each point on the trend line represents the average over 4*60*60/51=282measurements(seconds).

Max

imum

Min

imum

Minimum

Maximum

Average

Live r

eadin

g

ISC

SC

T

120.0

90.0

60.0

30.0 109.3 µS/cm

450

Figure 4.2 Trend screen

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4.3 Zoom in on details This button gives access to the diagnostic information of the converter. The following messageswillappearundernormal(default)conditions:

- Home key back to main screen.

- Onelevelup.

- Scroll choices (greymeansdeactivated).

- Enter selected data or choice.

First zoom screen gives you inside into the parameters involving current measurement. All following zoom screens give additional information about the device and lead to logbook data.

Next

NextNext

Next

Figure 4.3 Detail screen

4.3.1 Actual mA1The current output in mA of the first current output, which is defined as mA1. The range andfunctionofthismAoutputcanbesetin:Routing:Commissioning>>Outputsetup>>mA1

4.3.2 Actual mA2ThecurrentoutputinmAofthesecondcurrentoutput,whichisdefinedasmA2.TherangeandfunctionofthismAoutputcanbesetin:Routing:Commissioning>>outputsetup>>mA2

4.3.3 S1/S2/S3/S4The current state of contacts 1 to 4. The functions and settings of the contacts can be set in:Routing:Commissioning>>Outputsetup>>S1/S2/S3/S4

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4.3.4 C.C. (factory)The nominal cell constant as determined by the factory calibration during production. This value is set during commissioning, and is found on the nameplate of the sensor or the calibrationcertificate.Routing:Commissioning>>Measurementsetup>>Configuresensor

4.3.5 C.C. (adjusted)The calibrated cell constant. When the cell constant of the system is adjusted on-line by grab sample or by calibrated solution technique, the new cell constant is recorded here. This value should not deviate greatly from the original factory calibration. In the event that thereisasignificantdiscrepancyseenbetweenthisreadingandtheC.C.(factory)value,the sensor should be checked for damage and cleanliness.Routing is via the “Calibration” menu.

4.3.6 Temp. comp 1The chosen temperature compensation method for the primary measurement.Routing:Commissioning>>Measurementsetup>>Temp.compensation

4.3.7 Temp. comp 2The chosen temperature compensation method for the secondary measurement.Note: Thisdoesnotimplytwoseparatemeasurements.Thereisthepossibilitytosettwoseparate

compensation methods so that two different stages of the same process can be monitored accurately.Anexampleisprocess/cleaningfluidinterface.

Routing:Commissioning>>Measurementsetup>>Temp.compensation

4.3.8 Sensor ohmsThe input measurement as an uncompensated resistance value.

4.3.9 Last calibrated atThe date of the last calibration

4.3.10 Calibration due atIn the time frame scheduled for the next calibration. This field is determined by the calibration interval.Routing:Commissioning>>Measurementsetup>>Calibrationsettings

4.3.11 Projected calibration atA diagnostic output, showing the time frame when the unit should next be maintained accordingtothesophisticatedself-diagnostictoolsbuiltintotheEXAxtsoftware.Priortocalibration the sensor should be well cleaned and rinsed.

4.3.12 HART IDApartoftheHARTdeviceID(descriptor)

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4.3.13 Software revisionThe revision level of the software in the instrument

TROUBLE SHOOTINGIfyoucontactthelocalsales/serviceorganizationtheserialnumberandsoftwarerevisionis necessary information. Without that information it is impossible to help you. It is also very usefultoreportalltheinformationthatyoufindonthezoom-indisplay.

4.3.14 HART Device revisionSometimesthefirmwareofadeviceisupdatedinawaythatthecommunicationfile(HARTDD)needrevisiontoo.Inthiscasetherevisionlevelisincreasedbyone.Therevisionlevel of the HART DD must match the revision level of the Firmware. The revision level is expressedbythefirsttwocharactersofthefilename.ThefollowingfilesshouldbeusedwhentheHARTDevicerevisionlevelis2.(0201.aot,0201.fms,0201.imp,0201.sym)

4.3.15 LogbookThe ISC450G contains several logbooks to store history information on events, changed settings and calibrations. The logbooks have been categorized to simplify the retrieval of this information.

Calibration will give information of previous calibrations. This logbook is useful as one now can1) Monitorthesensorperformanceovertime.2) Monitorthesensor(s)lifetime.

Sensorwillgiveallhistoryinformationonparametersettingsconcerningthesensor(s).Theeventsloggedinthislogbookareuserdefinable.Thisisdonein:Commissioning>>ConfigureLogbook>>SensorLogbook.

Settings will give all history information on parameter settings concerning the analog outputs(mA1/mA2)andcontact(S1…S4).Thislogbookisusefultotracebackdifferencesin performance due to changed settings. The events logged in this logbook are user definable.Thisisdonein:Commissioning>>ConfigureLogbook>>SettingsLogbook–mAand/orSettingsLogbook– contact

mA1/mA2showsall(dynamic)eventsconcerningtheanalogoutputsS1/S2/S3/S4showsall(dynamic)eventsconcerningthecontacts.Each HMI screen can contain up to 5 events.As the logbook can contain 50, one can access previous events by selecting events page 1 to 10.

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4.4 Information functionIn this field an information sign , a warning sign or a fail sign can appear. Pushing this button, the user gets detailed information about the status of the sensor or the instrument if applicable.Seetroubleshooting(chapter8)forfurtherdetails.

4.5 Setup-calibration & commissioningBypressingthesetup key, you get access to the operating system of the converter based on menus and submenus.

Browsethroughthelistusingthe key till you find the required menu and press the

key to enter this menu.It is also possible to press on the or symbol found beside the menu item.

4.6 Secondary-primary value display switchPressing on this text block automatically switches the secondary value to the main display (Largefontsize).

25.0

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4.7 Navigation of the menu structure

“RET

URNKE

Y”exittoprevio

usdisp

lay

Main display

Primary setup display

Commissioning menu display

InstrumentinHOLD

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5. MENU STRUCTURE COMMISSIONING

OnMeasurementsetup,defineparameters.TheaccesstotheMeasurementsetupcanbe secured by password. If you use password, store the password information at a safe place.When you start up the operation of the instrument, parameters are default values given at thefactory.Definetheparameterstosuittheuser’spreferenceorpurposessuchastypeof combination or sensors to use.It is recommended to store each value as a user defined default as long as the operation runs smoothly after you change parameters .Youcanalsostoretheuserdefineddefaultallatonceinthefollowingsteps.Measurementsetup>>Advancedsetup>>Defaults>>SavecurrentasuserdefinedRead the item of Advanced setup in Chapter 5 for further description.

CAUTIONDONOTturnoffpowerimmediatelyafteryouchangethevalue.Itmaytakeapproximatelyone minute to save the value after you change.

5.1 Configuresensorl Measuring unit /cm /m

Either/cmor/mcanbechosenhere.TheProcessvalueswillbeexpressedinS/cmorS/mrespectively.

l Cell constant (factory)Cell constant given by factory calibration. Usually given on a label on the sensor or the calibrationcertificate.

l MeasureProcessvaluestobemeasuredcanbeselectedtosuittheuser’spreference.:Conductivityonly, Concentration only or one of both Conductivity and Concentration.

5.2 Temperature settingl Temperature Element

Selection of the temperature sensor used for compensation. The default selection is the Pt1000Ohmsensor,whichgivesexcellentprecisionwiththetwowireconnectionsused.Theotheroptionsgivetheflexibilitytouseaverywiderangeofothersensors.

l UnitCelsius or Fahrenheit temperature scales can be selected to suit the user’s preference.

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5.3 Temperature compensationl Compensation

Two types of methods can be used here.Automatic when a temperature element is used. Select one of the Temp. elements used.The other is a manual set temperature. The manual temperature that represents the process temperature must be set here.

l Reference TemperatureChoose a temperature to which the measured conductivity value must be compensated. Normally25°C(77ºF)isused,thereforethistemperatureischosenasdefaultvalue.

l MethodTCIn addition to the temperature coefficient calibration routine it is possible to adjust the compensation factor directly. If the compensation factor of the sample liquid is known from laboratory experiments or has been previously determined, it can be introduced here.Adjustthevaluebetween0.00to3.50%per°C.Incombinationwithreferencetemperaturea linear compensation function is obtained, suitable for all kinds of chemical solutions.NaClTemperature compensation according NaCl curve. See appendix 1 for values.MatrixThe ISC450G is equipped with a matrix type algorithm for accurate temperature compensation in various applications. Select the range as close as possible to the actual temperature/concentrationrange.TheISC450Gwillcompensatebyinterpolation.Ifuserdefined 1 or user defined 2 is selected, the temperature compensation range for the adjustablematrixmustbedefined.See Appendix 2 for matrix interpolation.

NOTEExtra information on temperature compensation is given in appendix 1.

5.4 Calibration settingsl Air adjust limit

Toavoidcableinfluencesonthemeasurement,a“zero”calibrationwithadrysensormaybedone.Ifaconnectionbox(BA10)andextensioncable(WF10)arebeingused,“zero”calibration should be done including this connection equipment.Asthecalibrationisperformedinairtheresistivityisinfinite(openconnection).Higherconductivity values than the air adjust limit indicate the cell is not in air or is still wet. To prevent wrong air calibrations a limit must be given here.

NOTEThetemperaturecompensationshouldbesettoNaClwhenconfirmingzeroatairadjust.

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Enter

Measurement setup

Temperature settings Temp. Compensation Calibration settings Concentration

Measure Conductivity only Configure sensor

Menu Parameter Default values Rangemin. max.ConfigureSensor Cell constant 1.88 cm-1 0.2 cm-1 50.0 cm-1

Temp. Comp. Reference Temp. 25ºC,77ºF 0ºC, 32ºF 100ºC, 211ºFManual Comp. Manual Temp. 25ºC,77ºF -20ºC, -3.9ºF 139ºC, 284ºFTemp. Coef T.C.methods 1 2.10%/ºC 0%/ºC,0%/ºF 3.5%/ºC,2.0%/ºF

T.C.methods 2 2.10%/ºC 0%/ºC,0%/ºF 3.5%/ºC,2.0%/ºF

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l c.c. high limitHighlimitofthecellconstantexpressedin%ofnominalvalue.Duringcalibrationthisvalueis used to check if the calibrated cell constant remains within reasonable limits.

l c.c. low limitLowlimitofthecellconstantexpressedin%ofnominalvalue.Duringcalibrationthisvalueis used to check if the calibrated cell constant remains within reasonable limits.

l Stabilization timeDuring calibration the stability of the measurement is constantly monitored. When the valueiswithinabandwidthof1%overaperiodofthestabilizationtime,thecalibrationisconsidered stable and the calibration may be completed.

l Calibration IntervalA user defined interval in which a new calibration should take place. If the interval is exceededtheinstrumentwillgiveawarningorafail(userdefinableinerrorconfiguration2/3)

5.5 ConcentrationConcentration has a direct relation with the conductivity value at reference temperature. This relation is built in every matrix which are used for temperature compensation. These canbefoundin: Commissioning >> Measurement setup >> Temp. compensation >> MethodByselectingoneofthematricesfortemperaturecompensationdirectlygivestheconcentration value on the main display. If another temperature compensation method is chosen(NaClorT.C.),therelationbetweentheconductivityatreferencetemperatureandthe concentration is obtained from the “Concentration table”.

l Additional tableThis21x2userdefinedconcentrationtableisusedtocometomoreaccurateconcentrationvalues compared to the temperature compensation matrix. Enabling this additional table overrulestheconcentrationvaluesobtainedfromthematrix(ifused).

l Unit for tableThe way the concentration values are presented to the user. Changing the unit will not result in a re-calculation of the table.

5.6 mA output setupThegeneralprocedureistofirstdefinethefunction(control,output,simulate,off)oftheoutput and second the process parameter associated to the output.Available process parameters depend on selected “sensor type” and “measurement setup”.Off: Whenanoutputissetofftheoutputisnotusedandwillgiveanoutputof4

mAControl: AselectionofP-PI-orPIDcontrolManual: StaticoutputrequiredtomaintainresetequilibriumstatewithsetpointDirection: Direct.IftheprocessvariableistoohighrelativetotheSP,theoutputofthe

controllerisincreased(directaction). Reverse. If the process variable is too high relative to the SP, the output of

thecontrollerisdecreased(reverseaction).

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Enter

Measurement setup

Temperature settings Temp. Compensation Calibration settings Concentration

Measure Conductivity only Configure sensor

Concentration measurement is only possible if “measure” in the “Configuresensor”menuissetto“conductivity+concentration”or “Concentration only”.

Menu Parameter Default values Rangemin. max.Calibration Air adjust 100.00μS 0μS 100μS

c.c. high 120% 100% 120%c.c. low 80% 80% 100%Stabilization time 5 s 2 s 30 sCalib. interval 250 days 1 day 250 days

Concentr. Table Table See appendix

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Output: Linearornonlineartableoutput. The table function allows the configuration of an output curve by 21 steps

(5%intervals).Inthemainmenuconcentrationcanbeselectedtosettheconcentration range.

Simulate: Percentageofoutputspan. Normal span of outputs are limited from 3.8 to 20.5 mAFailsafe: ContactS4isprogrammedasafail-safecontact.

BurnLoworHighwillgiveanoutputof3.6resp.21mAincaseofFailsituation.

NOTEWhen leaving Commissioning, Hold remains active until switched off manually. This is to avoid inappropriate actions while setting up the measurement.

l Proportional controlProportional Control action produces an output signal that is proportional to the difference betweentheSetpointandthePV(deviationorerror).Proportionalcontrolamplifiestheerror to motivate the process value towards the desired setpoint. The output signal is representedasapercentageofoutput(0-100%).Proportional control will reduce but not eliminate the steady state error. Therefore, proportionalControlactionincludesaManualReset.Themanualreset(percentageofoutput)isusedtoeliminatethesteadystateerror.

NOTEAnychanges(disturbances)intheprocesswillre-introduceasteadystateerror.

Proportional control can also produce excessive overshoot and oscillation. Too much gain may result in an unstable- or oscillating process. Too little gain results in a sustained steady state error. Gain = 1/Range. [PV units]

l Integral controlIntegral control is used to eliminate the steady state error and any future process changes. Itwillaccumulatesetpointandprocess(load)changesbycontinuingtoadjusttheoutputuntiltheerroriseliminated.Smallvaluesofintegralterm(I-timeinseconds)providequickcompensation, but increase overshoot. Usually, the integral term is set to a maximum valuethatprovidesacompromisebetweenthethreesystemcharacteristicsof:overshoot,settlingtime,andthetimenecessarytocanceltheeffectsofstaticloading(processchanges).Theintegraltermisprovidedwithanantiwindupfunction.WhentheoutputofPIportionofthecontrollerisoutsidethecontrolrange(lessthan-5%orgreaterthan105%),the I-part is frozen.

SPPVe

+- ++ ++

+-

eRange

∫e dt1Ti

TddPVdt

z

Process

Controller

Actuator

Process

Figure 5.1 Control Diagram

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mA2 similar structure to mA1

Menu Parameter Default values Rangemin. max.mA1(control) Expire time 0.0 sec. 0.0 sec. 1800 sec.mA1(output) Damping time 0.0 sec. 0.0 sec. 3600 sec.mA1(simulate) Simulation perc. 50% 0% 100%PID-control mA1 Setpoint 500mS/cm (0.0nS/cm)* (999.9S/cm)*

Range 100mS/cm (0.0nS/cm)* (999.9S/cm)*PID-control mA2 Setpoint 25ºC/ºF (-99.9ºC/ºF)* (999.9ºC/ºF)*

Range 10.0ºC/ºF (-99.9ºC/ºF)* (999.9ºC/ºF)*PID-control mA1 Manual Reset 0.000% 0.000% 100.0%PID-control I-time 3600 sec. 1 sec. 3600 sec.PID-control D-time 0.0 sec. 0.0 sec. 60.0 sec.LinearmA1 0%Value 0.000S/cm (0.0nS/cm)* (999.9S/cm)*

100%value 1.000S/cm (0.0nS/cm)* (999.9S/cm)*LinearmA2 0%Value 0.0ºC/ºF (-99.9ºC/ºF)* (999.9ºC/ºF)*

100%value 100.0ºC/ºF (-99.9ºC/ºF)* (999.9ºC/ºF)**: User-settablevalue

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l Derivative controlThecontrolactsontheslope(rateofchange)oftheprocessvalue,therebyminimizingovershoot. It provides “rate” feedback, resulting in more damping. High derivative gains can increase the rising time and settling time. It is difficult to realize in practice because differentiation leads to “noisy” signals.

l ExpiretimeIftheoutputisover100%forlongerthantheexpiretime,theoutputwillreturnto0%.

l Damping timeThe response to a step input change reaches approximately 90 percent of its final value within the damping time.

100%

0% setpoint

processvalue

Direct

100%

0% setpoint

processvalue

Reverse

range

range

manualreset

manualreset

Figure 5.2 Direct/Reverse action

5.7 Contact output setupl S1/S2/S3/S4

EachSwitch(contact)canhavethefollowingfunctions.1. Control: AselectionofP-PI-orPIDcontrol2. Alarm: LoworhighvalueLimitsmonitoring3. Hold: AholdcontactisenergisedwhentheinstrumentisinHOLD4. Wash: Seesection6.85. Fail: S4issetasfail-safecontact.6.6. Simulate: To test the operation of the contact, simulate can be used. The contact can

beswitchedonorofforapercentageofdutycyclecanbeentered(DCperiodtime)

7. Off: Switchisnotused. power on power on power down normal opened contact activated S1, S2, S3 S4

Above table shows contact output status between common to NO.

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S2, S3, S4 Similar structure to S1

Menu Parameter Default values Rangemin. max.PID-control S1 Setpoint 500.0mS/cm (0.0nS/cm)* (999.9S/cm)*

Range 100.0mS/cm (0.0nS/cm)* (999.9S/cm)*P(ID)-controlS1 Manual Reset 0.000% 0.000% 100.0%PI(D)-controlS1 I-time 3600 sec. 1 sec. 3600 sec.P(I)D-controlS1 D-time 0.0 sec. 0.0 sec. 60.0 sec.Duty cycle DC period time 10.0 sec. 1.0 sec. 1800 sec.Pulse freq. Max. pulse freq. 70p/min. 1p/min. 120p/min.Alarm S1 Setpoint 900.0mS/cm(high) (0.0nS/cm)* (999.9S/cm)*Alarm S2 Setpoint 100.0mS/cm(low) (0.0nS/cm)* (999.9S/cm)*Alarm S1 Hysteresis 9.000mS/cm (0.0nS/cm)* (999.9S/cm)*Alarm S2 Hysteresis 1.000mS/cm (0.0nS/cm)* (999.9S/cm)*Alarm Delay time 0.2 sec. 0.0 sec. 1800 sec.

Expire time 0.0 sec. 0.0 sec. 1800 sec.Hold Fixed value mA1 12.00 mA 3.600 mA 21.00 mA

Fixed value mA2 12.00 mA 3.600 mA 21.00 mA*: User-settablevalue

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l ConfigureholdHold is the procedure to set the outputs to a known state when going into commissioning. DuringcommissioningHOLDisalwaysenabled,outputswillhaveafixedorlastvalue.DuringcalibrationthesameHOLDfunctionapplies.Forcalibration,itisuptotheuserifHOLDisenabledornot.

Setpoint

Hys.

pH

off on off

Delay time Delay timet (sec)

Figure 5.3 Alarm contact (on/off control)

100

50

0

ton toff

50% 50%

% controller output

Range

Duty cycle

ton > 0.1 sec

Duty cycle

toff > 0.1 sec

Duty cycle

Figure 5.4 Duty cycle control

100

50

0

% controller output

Range

0.3 s

Maximum pulse frequency

50% pulse frequency

No pulses

0.3 s

Figure 5.5 Pulse frequency control

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S2, S3, S4 Similar structure to S1

(dependingonmA1andmA2outputsettings)

Menu Parameter Default values Rangemin. max.Simulation Percentage 50.0% 0.000% 100.0%

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l Lifetime contactsOneshouldnotethatthelifetimeofthecontactsislimited(106)Whenthesecontactsareusedforcontrol(pulsefrequencyordutycyclewithsmallintervaltimes)thelifetimeofthesecontactshouldbeobserved.On/OffcontrolispreferredoverPulse/dutycycle.

5.8 FailA fail contact is energized when a fail situation occurs. Fail situations are configured in section5.11.ForSOFTFailsthecontactandthedisplayonLCDarepulsating.ForHARDFailsthecontactandthedisplayonLCDareenergizedcontinuously.OnlycontactS4isprogrammedasafail-safecontact.ThismeansthatcontactS4willbe de-energized when a fail situation occurs.Hard Fail OnlyThecontactreactstoHardFailsOnlyHard + Soft FailThe contact reacts to Hard and Soft Fails

5.9 SimulateThecontactcanbeswitchedon/offorapercentageofoutputcanbesimulated.On/Offenables the user to manually switch a contact on or off. The percentage is an analogue value and represents the on time per period.TheDutycyclePeriodtime(seefigure5.4)isusedasaperiodforpercentagesimulation.Notethatthe(simulated)settingsofthecontactsbecomevisibleinmeasuringmodeandafterHOLDhasendedc.q.hasbeenoverruled.Awarningisactivatedincaseofasimulated output contact.

5.10 Input contactsTheterminaloftheISC450Gprovidesforaninputcontact(seeFigure3.7).Thisinputcontact can be used to switch the range of the outputs. The range can be increased by 1 decade.

5.11 Errorconfigurationl Errors 1/3 ~ 3/3

Errors are intended to notify the user of any unwanted situations. The user can determine whichsituationsshouldbeclassifiedas:FAIL,immediateactionisrequired.Theprocessvariableisnotreliable.WARN, the process variable processes by the converter is still reliable at this moment, but maintenance is required in the near future.

l Flashing“Fail”flaginmaindisplay “FAIL”givesaflashing“FAIL”flaginthemaindisplay.ThecontactconfiguredasFAIL(Commissioning >> output setup) will be energized continuously. All the other contacts are inhibited. Exception is the contact configured for ‘Wash’. Wash cycles are notinterruptedasthismightcausescaling/foulingtotheelectrodes.AFailsignalisalsotransmittedonthemA-outputswhenenabled(burnhigh/low).(Commissioning >> output setup)

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Menu Parameter Default values Rangemin. max.Errors High limit 1.000S 0.1S 3S

Lowlimit 5.000μS 0.0S 100μS

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l Flashing“Warn”flaginmaindisplay “WARN”givesaflashing“WARN”flaginthedisplay.ThecontactconfiguredasFAILis pulsed. All the other contacts are still functional, and the converter continues to work normally. A good example is a time-out warning that the regular maintenance is due. The userisnotified,butitshouldnotbeusedtoshutdownthewholemeasurement.

5.12 Logbookconfigurationl General

Logbookisavailabletokeepanelectronicrecordofeventssuchaserrormessages,calibrationsandprogrammeddatachanges.Byreferencetothislog,userscanforinstanceeasily determine maintenance or replacement schedules.

In“ConfigureLogbook”theusercanselecteachitemheisinterestedintobeloggedwhenthe event occurs. This can be done for three separate logbooks. Each logbook can be erasedindividuallyorallatonce.Enablethe”WarnifLogbookfull”whenyouwouldliketobewarnedwhenthelogbookisalmostfull.Thecontentofthelogbook(s)canalsoberetrievedfromtheconverterusingthe“EXAxtConfigurator”softwarepackagewhichcanbe downloaded from the Yokogawa Europe website.

5.13 Advanced setupl Defaults

The functionality of the ISC450G allows to save and load defaults to come to a known instrumentsetting.TheISC450Ghasbothfactoryanduserdefineddefaults.After a “load default” the instrument will reset. The following parameters are not included in the defaults1. X-axistiming2. Autoreturn(10min/disabled)3. Tag4. Passwords5. Date and time6. Language7. Thecontentsofalllogbooks8. HARTparameters(address,tag,descriptor,message)

l TagA tag provides a symbolic reference to the instrument and is defined to be unique throughout the control system at one plant site. A tag can contain up to 12 characters. If theinstrumentispurchasedwiththe/SCToption,theTAGispre-programmedwiththespecifiedtagnumber.

l PasswordsCalibrationandCommissioningmaybeseparatelyprotectedbyapassword.Bydefaultboth passwords are empty. Entering an empty password results in disabling the password check. A password can contain up to 8 characters. When a password is entered for the calibrationandcommissioninga4-digitoperatorIDcanbeentered.OnecanalsoleavetheID empty.

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Menu Parameter Default values RangeLow HighHART Network address 0 0 15

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l Date/timeTheLogbooksandtrendgraphusetheclock/calendarasreference.Thecurrentdateandtime is set here. The current time is displayed in the third “zoom” menu.

NOTEThefixedformatisYYYY/MM/DDHH:MM:SS

l HARTTheaddressoftheISC450GinaHARTnetworkcanbeset.Validaddressesare0...15.

l Factory adjustmentThis menu is for service engineers only. This section is protected by a password.Attempting to change data in the factory adjustment menu without the proper instructions and equipment, can result in corruption of the instrument setup, and will impair the performance of the unit.

5.14 Display setupl Main display

ThemaindisplayconsistsofthreelineswithProcessValues.EachlineisuserdefinablewiththerestrictionthateachlineshouldhaveadifferentProcessValue.Thedefaultsettingscanbedefinedhere.Bypressingoneofthetwosmallerprocessvalues,thiswillbecome the main process value in the main screen. Auto return will cause the main display to go to default setting.Seealso4.6SecondarytoPrimaryValuedisplaySwitch.

NOTEConfiguration possibilities in the main and secondary display lines are determined by the choices made in the menu measurement Measurement setup >> Measurement

l AdditionaltextEach process value can be given an additional text containing up to 12 characters per text. This text is displayed on the main display next to the process value. This way the user can distinguish separate measurements.

l X-axistimingThe time range of the trend graph can be set from 15 minutes up to 14 days.

l Y-axislimitsThe ranges for each measurement need to be set according the application.

l Auto returnWhenAutoreturnisenabled,theconverterrevertstothemeasuringmode(maindisplay)fromanywhereintheconfigurationmenus,whennobuttonispressedduringthesettimeintervalof10minutes.TheHOLDflagwillbeclearedandalloutputswillfunctionnormally.

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Menu Parameter Default values RangeLow HighY-axis Conduct low 0.000S/cm (0.0nS/cm)* (999.9S/cm)*

Conduct high 500.0μS/cm (0.0nS/cm)* (999.9S/cm)*Conduct 2 low 0.000S/cm (0.0nS/cm)* (999.9S/cm)*Conduct 2 high 500.0μS/cm (0.0nS/cm)* (999.9S/cm)*Temp. low 0.0ºC/ºF (-99.9ºC/ºF)* (999.9ºC/ºF)*Temp. high 100.0ºC/ºF (-99.9ºC/ºF)* (999.9ºC/ºF)*

*: User-settablevalue

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6. CALIBRATION6.1 Before calibration

1. When is calibration necessary?Calibration of con duc tiv i ty in stru ments is not normally nec es sary as the con duc tiv i ty cells are man u fac tured to close tol er anc es and do not al ter in use.

Ifthecellhasseverefoulingorbeensubjecttoabrasion(possiblyduringcleaning)itmaybe necessary to calibrate.

SincetheISC450G/ISC40inductiveconductivitysystemmeasurestheconductivityofthe“liq uid winding” through the doughnut, part of this “measuring cell” is outside the dough nut. If there is little space between dough nut and process piping, calibration with a sam ple of theprocessfluidisnecessarytoensureaccuratemeasurement.

2. How is calibration done?Calibration is carried out by measuring a so lu tion which has known conductivity and adjusting the instrument to show the cor rect conductivity value.Thecalibrationcanbeachievedusingoneoftwomethods:(1) Acalibrationsolutioncanbepreparedinthelaboratory.Asaltsolutionispreparedwith

a known precise concentration. Thetemperatureisstabilizedtothereferencetemperatureoftheinstrument(usually

25°C).Theactualconductivityvalueofthesolutionistakenfromtables.Tocalibratethe in stru ment, the sensor is removed and sus pend ed in the solution, the conductivity val ue from the tables is then entered and the cal i bra tion routine completed.

Make sure the sensor does not touch the sides of the container, refer to Figure 6.1.(2) Alternativelytheinstrumentcanbecalibratedusingtheprocesssolutionmeasured

with a standard instrument. Care must be taken to make the measurement at the ref-er ence tem per a ture since differences in the type of tem per a ture compensation of the instruments may cause an error. With this method the sensor is not removed from the process. This method is the most convenient method of calibrating the ISC450G converter. Since the sensor is im mersed in the process, errors caused by in stal la tion characteristics are compensated for.

NOTEThe standard instrument used as ref er ence method must be ac curate. Yokogawa recommendsthattheModelSC72personalconductivitymeterbeusedforthispurpose.

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X = MIN 25 mm

XX

X

Figure 6.1 Sensor in calibration solution

Cellconstant:Thenominalcellconstantofthesensoris1.88cm-1forthePEEKsensortypes and 3.00 cm-1 for the PFA sensor. The calibrated values are indicated on the cable markers and the actual installation can change this factor. If there is less than 25 mm spacing between sensor and holder, in-situ calibration is necessary to meet the specified accuracies.

D

non conductivepiping

conductivepiping D i n m i l l i m e t e r s

0 10 20 30 40 50

0.90

Cor

rect

ion

fact

or (x

nom

inal

C.C

.)

0.95

1.30

1.25

1.20

1.00

1,05

1.10

1.15

Only for PEEK

6.2 Cell constant manualThe intention of this calibration routine is to fine tune a sensor for which only the nominal cellconstantisknown,orrecalibrateasensorthathasbeenchanged(ordamaged)inthe course of operation. Choose 1st or 2nd compensation to suit the calibration solution used. The solution should be prepared or purchased, meeting the highest standards of precision available. Allow the sensor to reach stable readings for both temperature and conductivity before adjusting to correspond to the calibration solution value. The setting of acellconstantforanew(replacement)sensorisalsopossibleinthisroutine.Thisavoidsthe need for entry into the commissioning mode, which may have another authorization (password)level.

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Press the key and choose “Execute:Calibration.” Press “Cell constant (manual)” to execute calibration.

6.3 Cell constant automaticThisroutineisbuiltaroundthetestmethoddescribedinOIML(OrganisationInternationaledeMetrologieLegale).InternationalRecommendationNo.56.Itallowsthedirectuseof the solutions prescribed in the test method, automatically selecting the appropriate temperature compensation. The look up table is used to find the appropriate conductivity readingforthemeasuredtemperature.Seeappendix3forOIMLsolutions

Press the key and choose “Execute:Calibration.” Press “Cell constant (automatic)” to execute calibration.

6.4 Air (zero) calibration With the clean dry cell in open air, the reading should be zero. The Air cal compensates for excess cable capacitance, and gives a better accuracy at low readings. This should be done for all installations during commissioning. After some time in service a dirty sensor may well show a high zero offset because of fouling. Clean the sensor and try again.• Waitforthesensortodry(becauseaircalmustbemadewithnocurrentflowinthe

sensor,thatis,thesensormustbedriedwhilebeingexposedtoair).• Thesensormustbeinstalledinanenvironmentfreeofelectromagneticinterference

and radio frequency interference.

Press the key and choose “Execute:Calibration.” Press “Air calibration” to execute it.

CAUTIONThe temperature compensation should be set to NaCl when confirming zero during air calibration.

6.5 Sample calibrationWith the sensor in situ, a sample can be taken for laboratory analysis. Sample calibration records the time and reading, and holds these in memory until the analysis has been completed. The laboratory data can then be entered regardless of the current process value, without the need for calculations.

Press the key and choose “Execute:Calibration.” Press “Sample” to execute sample calibration.

Press [Take Sample] to record a collected sample value in memory. Re-enter the Sample Cal. screen and press [Start calibration] to perform a sample calibration. This updates the recorded data.

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6.6 TemperaturecoefficientcalibrationSimplyinputthesolutionconductivityatthereferencetemperature(TR)afterallowingthesensor to stabilize at elevated temperatures. The ISC450G will calculate the temperature coefficient for you. The ideal temperature for this calibration is the normal process value (TP).ThiscalibrationisenablediftheTemperatureCompensationissetto“TC.”

Press the key and choose “Execute:Calibration.” Press “Temperaturecoefficient” to execute this calibration

6.7 Temperature calibration In order to make the most accurate measurements, it is important to have a precise temperature measurement. This affects the display of temperature, and the output signal when used. More important, however, is the temperature compensation, and calibration accuracy.The temperature of the sensor system should be measured independently with a high precision thermometer. The display should then be adjusted to agree with the reading (zerooffsetcalibrationonly).Forbestaccuracythisshouldbedoneasneartothenormaloperating temperature as possible.

Press the key and choose “Execute:Calibration.” Press “Temperature calibration” to execute it.

6.8 Operation of hold function during calibrationISC450GhasaHOLDfunctionthatwillsuspendtheoperationofthecontrol/alarmrelaysand mA-outputs.

Duringcalibration,theusermaychoosetoenableHOLDsothattheoutputsignalsarefrozen to a “last” or “fixed” value. Some users will choose to leave the outputs “live” to record the calibration event. This has implications for pharmaceutical manufacture, for example, where an independent record of calibrations is mandatory.

PresstoselectExecute:“HOLD” and then choose “Manual Hold ON” or “Manual Hold OFF”. This allows you to set up manual hold.Tocancelmanualhold,pressthelitHOLDsectionontheMaindisplay.

Press “HOLD”buttononmainscreen,toremovetheHOLD.

TherouteforHOLDsetupisCommissioning>>Outputsetup>>ConfigureHold

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7. MAINTENANCESPARE PARTSSeeCustomerMaintenancePartsList.

7.1 Periodic maintenanceThe converter requires very little periodic maintenance, except to make sure the front window is kept clean in order to permit a clear view of the display and allow proper operation of the touchscreen. If the window becomes soiled, clean it using a soft damp cloth or soft tissue. To deal with more stubborn stains, a neutral detergent may be used.

Whenyoumustopenthefrontcoverand/orglands,makesurethatthesealsarecleanandcorrectlyfittedwhentheunitisre-assembledinordertomaintainthehousing’sweatherproof integrity against water and water vapor. The pH measurement uses high impedance sensors and may otherwise be prone to problems caused by exposure of the circuitry to condensation.

NOTENever use harsh chemicals or solvents. In the event that the window does become heavily stained or scratched, refer to the parts list for replacement part numbers.

l BatteryThe ISC450G converter contains a logbook feature that uses a clock to provide the timings. Theinstrumentcontainsalithiumcell(battery)tosupporttheclockfunctionwhenthepower is switched off. The cell has an expected working life of 10 years. Should this cell need to be replaced, contact your nearest Yokogawa service center.

l FuseThere is a circuit board mounted fuse protecting the instrument. If you suspect that this needs to be replaced, contact your nearest Yokogawa service center.

7.2 Periodic maintenance of the sensorNOTEMaintenance advice listed here is intentionally general in nature. Sensor maintenance is highlyapplicationspecific.

In general conductivity measurements do not need much periodic maintenance. If the ISC450G indicates an error in the measurement or in the calibration, some action may be needed(ref.chapter8troubleshooting).

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7.3 Cleaning methods1. For normal applications hot water with domestic washing-up liquid added will be

effective.2. Forlime,hydroxides,etc.,a5...10%solutionofhydrochloricacidisrecommended.3. Organiccontaminants(oils,fats,etc.)canbeeasilyremovedwithacetone.4. Foralgae,bacteriaormoulds,useasolutionofdomesticbleach(hypochlorite).

* Never use hydroc