MU_MT9_FR

MT912S Series

MF - GAPS Beacon

User’s Manual

MT912S – User’s Manual

Copyright © 2011, iXSea, France. All rights reserved. No part of this manual may be

reproduced or transmitted, in any form or by any means, whether electronic, printed

manual or otherwise, including but not limited to photocopying, recording or

information storage and retrieval systems, for any purpose without prior written

permission of iXSea.

Disclaimer iXSea specifically disclaims all warranties, either express or implied, included but

not limited to implied warranties of merchantability and fitness for a particular

purpose with respect to this product and documentation. iXSea reserves the right

to revise or make changes or improvements to this product or documentation at any

time without notify any person of such revision or improvements.

In no event shall iXSea be liable for any consequential or incidental damages,

including but not limited to loss of business profits or any commercial damages,

arising out of the use of this product.

Trademarks Microsoft, MS-DOS and Windows are registered trademarks of Microsoft

Corporation. Intel and Pentium are registered trademarks and Celeron is a

trademark of Intel Corporation.

MU-MT9-AN-001 Ed.I – March 2011 i


Warranty

iXSea provides a standard warranty of one (1) year covering this product against any

defect in materials or manufacture. The warranty starts from the date of shipment of the

product from iXSea’s manufacturing premises to customer’s location and its duration is

indicated in the certificate of warranty delivered with the product. In the event that a defect

in materials or manufacture becomes obvious during the stipulated warranty period, iXSea

will undertake, at its sole discretion, either to repair the defective product, bearing the cost

of all parts and labor, or to replace it with an identical product.

In order to avail itself of this warranty, Customer must notify iXSea of the defect before

expiry of the warranty period and take all steps necessary to enable iXSea to proceed.

Customer shall be responsible for the packaging and the shipment of the defective

product to the repair center notified by iXSea, the cost of such shipment being borne by

Customer. iXSea agrees to bear the cost of return freight, based on CPT (Cost Paid To)

Customer’s airport location, import tax-free.

This warranty shall not be construed as covering defects, malfunctions or damages

caused by improper use or inadequate maintenance of the product. Under no

circumstances shall iXSea be due to provide repair or replacement under this warranty in

order a) to repair damage caused by work done by any person not representing iXSea for

the installation, repair or maintenance of the product ; b) to repair damage caused by

improper use or connection to incompatible equipment, and specifically, the opening of

the housing of the equipment under warranty shall cause the warranty to be automatically

cancelled ; c) to maintain any product that has been modified or integrated into a larger

configuration, if such modification or integration increases the duration or difficulty of the

maintenance of said product.

This warranty covers the product hereunder and is provided by iXSea in place of all and

any other warranty whether expressed or implied. iXSea does not guarantee the suitability

of the product under warranty for sale or any specific use. iXSea’s liability is limited to the

repair or replacement of defective products, this being the sole remedy open to Customer

in the event the warranty becomes applicable. iXSea cannot be held liable for indirect,

special, subsequent or consequential damage, irrespective of whether iXSea has or has

not received prior notification of the risk of occurrence of such damage.

MU-MT9-AN-001 Ed.I – March 2011 ii


Text Usage

bold Bold text is used for items you must select or click in the

software. It is also used for the field names used into the dialog

box. Courier Text in this font denotes text or characters that you should enter

from the keyboard, the proper names of disk Drives, paths,

directories, programs, functions, filenames and extensions.

italic Italic text is the result of an action in the procedures.

Icons

The Note icon indicates that the following information is of interest to the operator and

should be read.

THE CAUTION ICON INDICATES THAT THE FOLLOWING INFORMATION SHOULD BE READ TO FORBID

OR PREVENT PRODUCT DAMAGE.

THE WARNING ICON INDICATES THAT POSSIBLE PERSONAL INJURY OR DEATH COULD RESULT

FROM FAILURE TO FOLLOW THE PROVIDED RECOMMENDATION.

MU-MT9-AN-001 Ed.I – March 2011 iii


Overview of the MT912S User Manual

This document is the User Manual for MT912S Mini Transponders. It must be read and

understood prior to using MT912S.

The manufacturer shall in no case be held liable for any application or use that does not

comply with the stipulations in this manual.

The MT912S User Manual is divided into five parts:

• Part 1: Introduction – This section gives a general overview of the MT912S and

describes the architecture of the system.

• Part 2: Installing the MT912S – This section helps you to install the MT912S.

• Part 3: Operating the MT912S – This part describes the deployment and the

operation of the MT912S in the simplest mode.

• Part 4: MMI Configuration Software – This part describes the MT912S configuration

software designed for the configuration of the transponder.

• Part 5: Maintenance – This part lists all the maintenance operations that you can

apply on the MT912S.

The abbreviations and acronyms used in this manual are listed hereafter.

A Table of Contents is available in the following pages to allow a quick access to

dedicated information.

MU-MT9-AN-001 Ed.I – March 2011 iv


Abbreviations and Acronyms

AUV Automated Unmanned Vehicle

CIF Common Interrogation Frequency

GAPS Global Acoustic Positioning System

IIF Individual Interrogation Frequency

IRF Individual Response Frequency

LBL Long Base Line

MMI Man Machine Interface

ROV Remote Operated Vehicle

RT Release Transponder

TBD To Be Defined

MU-MT9-AN-001 Ed.I – March 2011 v


Table of Contents

I INTRODUCTION ................................................................................................................................ 1

I.1 MT912S Overview.................................................................................................................... 1

I.2 Acoustic Specifications ......................................................................................................... 3 I.2.1 Responder Mode Specifications .......................................................................................... 4

I.2.2 Transponder Mode Specifications ....................................................................................... 5

I.2.3 Transmitter Module .............................................................................................................. 6

I.3 Mechanical Specifications ..................................................................................................... 7

I.4 Electrical Specifications ......................................................................................................... 8 I.4.1 Batteries ............................................................................................................................... 8

I.4.2 Autonomy ............................................................................................................................. 8

I.4.3 External Power Supply ......................................................................................................... 8

I.4.4 Electronic and Mechanical Ground ...................................................................................... 9

I.4.5 Input / Output Port ................................................................................................................ 9

I.4.6 Remote Acoustic Head (Option) ........................................................................................ 10

I.4.7 MT912S Cable Adaptor for Charging and Configuration ................................................... 11

II INSTALLING THE MT912S .............................................................................................................. 12

II.1 Verification of MT912S Pack Contents ............................................................................... 12

II.2 Quick Start ............................................................................................................................. 12

II.3 Storing .................................................................................................................................... 13

II.4 Floating Collar ....................................................................................................................... 13

III OPERATING THE MT912S ............................................................................................................. 14

III.1 Operational Modes ................................................................................................................ 14

III.2 Getting Started with the MT912S ......................................................................................... 15 III.2.1 Checking the Pressure Relief Valve .................................................................................. 15

III.2.2 Charging the MT912S ........................................................................................................ 15

III.2.3 Setting Up the Parameters of the MT912S ........................................................................ 15

III.2.4 Switching ON the MT912S ................................................................................................ 16

III.2.5 Testing the MT912S ........................................................................................................... 16

III.3 Mounting Recommendations ............................................................................................... 17 III.4 Recovering the MT912S ....................................................................................................... 18

IV MMI CONFIGURATION SOFTWARE .................................................................................................. 19

IV.1 Installing the MT912S MMI Software on the PC ................................................................. 19 IV.2 Connecting the Different Elements ..................................................................................... 19 IV.2.1 Using the USB Port of the PC ............................................................................................ 19

IV.2.2 Using the RS232 Port of the PC ........................................................................................ 20

IV.3 MMI Overview ........................................................................................................................ 21 IV.4 List of the MT912S Configuration Parameters ................................................................... 23

MU-MT9-AN-001 Ed.I – March 2011 vi


MU-MT9-AN-001 Ed.I – March 2011 vii

IV.5 Configuring the MT912S ....................................................................................................... 24 IV.5.1 Setting the Communication Port ........................................................................................ 24

IV.5.2 Loading, Saving a Configuration from a Disk .................................................................... 25

IV.5.3 Resetting the Configuration ............................................................................................... 26

IV.5.4 Selecting the Reply Codes & Transponder Interrogation Channel .................................... 26

IV.5.5 Configuring the Acoustic Transmit Level ........................................................................... 27

IV.5.6 Configuring the Blanking Time and Turn Around Time ..................................................... 27

IV.5.7 Computing Statistics .......................................................................................................... 28

IV.5.8 Saving the Configuration to the Beacon ............................................................................ 28

IV.5.9 Using the Command Utility Tool ........................................................................................ 28

IV.5.9.1 Displaying the Current Voltage .......................................................................................... 29 IV.5.9.2 Displaying the Current Pressure (Optional) ....................................................................... 29

V MAINTENANCE .............................................................................................................................. 30 CUSTOMER SUPPORT .......................................................................................................................... 35

CONTACT IXSEA ................................................................................................................................. 36

APPENDICES ....................................................................................................................................... 37

A. Principle of Fast Charging MT9x2 Transponders .............................................................. 37

B. Mechanical Drawings ........................................................................................................... 38 B.1 Technical Label .................................................................................................................. 38

B.2 References ......................................................................................................................... 38

B.3 Transducer PET 962S (P/N 940 0067) .............................................................................. 39

B.4 Cable for Remote Transducer (SUBCONN Connectors) .................................................. 40

B.5 Responder Cable for MT912 ............................................................................................. 41

B.6 Mechanical Drawing of MT912S-R .................................................................................... 42

B.7 Mechanical Drawing of MT912S – R / HD ......................................................................... 44


I INTRODUCTION

The MT912S Series acoustic Transponder/Responder are designed primarily for use with

GAPS underwater positioning system to track ROVs, tow fish and other subsea targets in

water depths up to 1,000 m. Compact and rugged MT912S uses iXSea wide spectrum M-

FSK technology. The MT912S can be interrogated by acoustic link through water

(transponder mode) or via cable (responder mode). It is powered from its own internal

rechargeable NiMH battery or an external supply.

THE RULES WHICH APPLY FOR THE CHARGING OF THE TRANSPONDER MUST BE STRICTLY

OBSERVED.

I.1 MT912S Overview Two versions of the MT912S exist. They are listed in the Table 1. The integral version is

illustrated in Figure 1.

Table 1 – MT912S Versions

Name Definition

MT912S – R

Standard version fitted with an integral transducer and an end cap

Micro SUBCONN socket 8-point connector for main external power

supply, internal power supply for safety positioning, responder

mode with automatic switch to transponder mode

MT912S – R / HD

OIGAPS-Beacon S - Mk2

MT912S-HD-R fitted with a remote transducer connected to the

main body by a 3 m long cable

Upon customer request, the MT912S can be equipped of a floating collar providing

positive buoyancy to the transponder. See section II.4.

MU-MT9-AN-001 Ed.I – March 2011 1


Figure 1 - MT912S – R with integral transducer

Figure 2 - MT912S – R / HD with remote transducer



I.2 Acoustic Specifications The MT912S transponder/responder features are:

• Sound pressure level: 188 dB ref. 1µPa at 1m (other levels 191 dB or 185 dB)

• Acoustic Transmit Pulse: M-FSK

• Four separate interrogation frequencies (1 among 4 field software selectable)

The MT912S receives an electric trigger or an acoustic interrogation pulse respectively in

responder mode (see section I.2.1) or in transponder mode (see section I.2.2). The

MT912S returns an acoustic signal that is received and processed by the hydrophone /

acoustic positioning system (see section I.2.3). The reply is a M-FSK wide spectrum pulse

that can be:

Trigger Mode

• One of the 10 response codes listed from 0 to 9

• Increasing FM chirp: from 21.739 kHz to 30,303 kHz = code 22

• Decreasing FM chirp: from 30.303 kHz to 21,739 kHz = code 23

After receiving a responder trigger pulse, the transponder mode is locked to DISABLE

state for about 25 seconds. After that, the MT912S returns automatically to ENABLE state

that allows the detection of an acoustic interrogation.

Inhibition

In addition, after receiving an electrical (responder) pulse or an acoustic (transponder)

interrogation pulse, the MT912S is inhibited for a field programmable blanking time to

prevent:

• Multiple interrogations due to noise or multipath in transponder mode

• Bounces or too high-rate trigger signal in responder mode

A MMI allows you to set up the parameters. Among them, you can select one interrogation

frequency among the four available frequencies. Four different interrogation frequencies

allow the simultaneous positioning of four targets.

Multi Targets



I.2.1 RESPONDER MODE SPECIFICATIONS

The specifications of the responder mode are as follows:

• Input triggering signal: opto-isolated logic signal (Insulation voltage: 5,300 V)

• Electrical level: differential input 5 V nominal (4 V to 25 V)

• With “Standard” mode, active on high level state OR with “Fast” mode, active on rising

edge of positive pulse

• Pulse duration: 10 ms

Figure 3 - Responder input

• Default setting for JP2: OFF (to provide full isolated responder input)

• Turn-around time

If “Standard” mode selected: Field programmable from 20 ms to 200 ms by 5 ms

step

If “Fast” mode selected: fixed, 1.5 ms

Jitter < ± 30 μs

• Blanking time

Field programmable from 0.8 to 10 s in 0.1 s step



I.2.2 TRANSPONDER MODE SPECIFICATIONS

At power ON of the MT912S unit, both responder and transponder modes are activated.

However, upon receipt of a responder trigger pulse, the transponder mode is

automatically locked (DISABLE) for 25 seconds (no trigger detection possible). After this

25 s period of time without responder synchronization, the MT912S turns the transponder

mode status to ENABLE and the MT912S unit is able to recognize an acoustic

interrogation.

After each acoustic emission (transponder or responder mode), the beacon inhibits itself

(the inhibition time can be set up) to avoid all multiple acoustic reflections of the trigger.

See Figure 4.

Figure 4 – Time diagram

• Maximum Noise Level NIS = 65 dB/ Hz in 18.5 – 30 kHz frequency band

• Tonal interrogation pulse length: 10 ms

• Four independent receiving channels 19.5 kHz, 20 kHz, 20.5 kHz, 21 kHz (factory

set) selectable from the software

• Detection Bandwidth ≅ 280 Hz (+/- 100 Hz)

• Minimum Detection Signal (MDS): 90 +/-5 dB re. 1µPa

• Turn-around time: configured with the MMI software

If “Standard” mode selected: from 20 ms to 200 ms in 5 ms step

If “Fast” mode selected: 10.8 ms fixed

Jitter ± 200 μs

• Blanking time after acoustic trigger (same as responder mode): field programmable

from 0.8 to 10 s in 0.1 s step



I.2.3 TRANSMITTER MODULE

Upon responder or transponder interrogations, the MT912S replies by transmitting an

acoustic pulse with the following characteristics:

• Sound level field programmable via the MMI software

Low: 185 ± 4 dB ref. 1μPa @ 1 m

Medium: 188 ± 4 dB dB ref. 1 μPa @ 1 m (Factory set)

High: 191 ± 4 dB ref. 1 μPa @ 1 m

• Radiating pattern: 180 ° (Hemispherical), - 0 dB, + 6 dB

• Acoustic pulse: M-FSK Wideband spread spectrum coded signal

• Central frequency: 26 kHz

• Pulse length: 10.200 ms for code 0 to 9 & 10.508 for codes 22 & 23

• Spectral bandwidth of MFSK pulse: 8.6 kHz

• 12 MFSK coded signals available: code from 0 to 9 and 22 or 23 (field selectable)

The codes are chosen from Costas series. They are made of 10 elementary signals. The

list of 10 signals that compose the family insures optimum characteristics in terms of auto

and cross-correlation. Phases are contiguous when switching from one elementary signal

to the next.

Codes 0 to 9

The signal that is transmitted by the beacon is frequency modulated according to a linear

FM sweep code (MFSK code 22 or MFSK code 23). The signal consists of 14 elementary

signals S(i) transmitted consecutively. Phases are contiguous when switching from one

elementary signal to the next. The code 22 corresponds to a code increasing in frequency,

the code 23 to a decreasing frequency.

Codes 22, 23

IN SIMULTANEOUS MULTI-BEACON MODE: CODES 22 AND 23 ARE NOT COMPATIBLE WITH CODES 0

TO 9.

IT IS RECOMMENDED TO PROCEED WITH THE MEDIUM (188 DB, FACTORY SET) TRANSMIT SOUND

LEVEL IN ORDER TO PRESERVE THE LIFETIME OF THE TRANSDUCER HEAD. HIGH LEVEL (191 DB)

MAY JEOPARDIZE THE TRANSDUCER INTEGRITY OVER THE TIME, PARTICULARLY WHEN

TRANSMITTING IN THE AIR.



I.3 Mechanical Specifications The MT912S environmental and mechanical specifications are listed in Table 2, Table 3.

The characteristics of the remote transducer are detailed in Table 4.

Table 2 – Environmental

Operational Depth Rating 1,000 m

Operating Temperature - 5 to + 40 °C

Storage Temperature - 20 to + 50 °C

Table 3 – Mechanical

Length MT912S – R

MT912S – HD - R

340 mm without the connector, 368 mm with connector

288 mm without the connector, 336 mm with connector

Diameter 91 mm

Weight 3.9 kg in the air, 2.0 kg in the water (MT912S – R)

Material Stainless Steel 316L, Polyurethane, Hypalon

Treatment/completion Nitric Passivation

Closure Screw with CHC M4 head, 10 mm in Stainless Steel A4

Lower cap connector (MT912S-R, MT912S-HD-

R) • SUBCONN 8 points (MCBH8F), I/O port for beacon

configuration, power supply and responder trigger

• Pressure relief vent, internal overpressure threshold

1 bar ± 20 % above external pressure

Upper cap connector (MT912S-HD-R only) SUBCONN 3 points (MCBH3F), connection to the

remote transducer (3 m long standard cable)

Table 4 – PET962E (p/n 9400067) remote transducer

Diameter 91 mm

Length 124 mm with connector

Cable Length 3 m

Maximum Depth 6,000 m

Electrical interface bulkhead connector SUBCONN MCBH3M

OCV (Sh) ≅ -189 dB ref. 1 V / 1 μPa @ 20 kHz

TVR (Sv) ≅ 131 dB ref. 1 μPa / 1 V @ 1 m @ 26 kHz

Directivity diagram Hemispherical



I.4 Electrical Specifications

I.4.1 BATTERIES

The MT912S is equipped with NiMH rechargeable batteries 7.2 V, 7600 mAh minimum.

The charger is installed inside the MT912S pressure housing. A specific power supply and

cable are provided with the MT912S to charge the battery pack. Please check the storing

recommendations in section II.3.

The principle of fast charging process is described in Appendix A.

The power consumption of MT912 Unit in quiescent state is about 1.6 mA @ 7.5 V.

The energy required per transmit pulse is about 1.7 Joule (@SPL=188 dB re.1µPa at 1m).

I.4.2 AUTONOMY

The fully charged battery pack offers a standby listening period of 4 to 5 months

(depending on temperature conditions) or a number of transmit pulses depending of the

transmitted level, as shown in Table 5.

Table 5 – Autonomy versus sound level and temperature

SPL in dB réf. 1µPa at 1m (5 s between pulses) 185 dB 188 dB (default) 191 dB

Temperature (Celsius) 20°C 0°C 20°C 20°C

7.2 V NiMH, 7,600 mAh 160,000 TBD 100,000 45,000

I.4.3 EXTERNAL POWER SUPPLY

The external power supply is used to charge the internal battery pack or to operate the

beacon over long period of time.

Table 6 – Electrical specifications

External Power 15 to 30 VDC, 36 W

Consumption • Average 11 to 13 W peak after acoustic transmission

• 80 to 200 mW quiescent

• 30 W while charging battery

If the external power supply disappears or is switched off, the internal battery pack

automatically powers up the MT912 unit, providing jumper between pins 1 and 5 of the

connector remains installed.



I.4.4 ELECTRONIC AND MECHANICAL GROUND

Electronic and Mechanical ground are separated. A 1.5 nF 2,000 V capacitor provides a

full isolation in DC current. See Figure 5.

Figure 5 – Remote transducer wiring

I.4.5 INPUT / OUTPUT PORT

The MT912S is fitted with an 8-pin MCBH8F SUBCONN female bulkhead connector with

pin-out as displayed in Table 7.

Table 7 – MCBH8F SUBCONN wiring

Pin # RS232 port

1 Ground

2 External Power Supply

15 to 30 VDC (Vext)

3 (-) Responder

4 (+) Responder

5 ON / OFF

6 TX_RS232

7 RX_RS232

8 NC

Front View

The matching in-line plug is referenced MCIL8-M from SUBCONN.

A pigtail responder cable p/n 9300218 is supplied with each MT912 unit.

The new version of the transponder has a RS232 port and are equipped with a ring

which is not red (generally blue). The older version with a red ring have a USB port.



• An ON-OFF switch plug is supplied to operate the MT912S unit for a stand-alone

application.

• When the operator is using an external power supply, it is compulsory to connect the

pin 1 to the pin 5 to switch the beacon on.

• The I/O port (RS232 Interface) is used for modifying the configuration of the MT912S.

For charging the internal battery pack and setting-up the MT912 configuration, iXSea is

supplying a specific cable adaptor when using a PC-computer fitted with an USB port:

MT912 Type of Communication Reference of Cable Adaptor to be used

RS232 4452320 (Grey housing)

I.4.6 REMOTE ACOUSTIC HEAD (OPTION)

In order to make easier the installation of the MT912S series on the underwater vehicle, it

is possible to split the transducer head from the beacon main housing.

When configured to operate with the PET962S remote transducer head (p/n 9400067),

the MT912S is equipped with an end-cap featuring a female MCBH3F bulkhead connector

instead of the standard integral transducer. The pin-out of the transducer port connector is

displayed in Table 8. The PET962/MT912 interconnect cable is referenced p/n 9300212.

Table 8 - SUBCONN MCBH3F wiring

Pin # Description

1 Transducer Hot point

2 Shield

3 Transducer Cold point

Front View



I.4.7 MT912S CABLE ADAPTOR FOR CHARGING AND CONFIGURATION

The MT912S cable adaptor Aim

• Provide the external power supply for battery charging

• Set-up the beacon parameters (edited from the MMI on the PC)

The MT912S adaptor is fitted (see Figure 6) on its two terminations with: Terminations

• 8-pin MCIL8M SUBCONN inline plug to connect the I/O port connector of the MT912S

unit for responder & external supply

• Connection box comprising:

Female type B USB plug for the interface with the computer (an adaptor USB A

USB B is also delivered)

Power supply connector

USB hub 2.0 (see Figure 7) used in order to protect the PC

Figure 6 – MT912S cable and plugs

Figure 7 – USB 2.0 hub



II INSTALLING THE MT912S

II.1 Verification of MT912S Pack Contents

ON RECEIPT OF THE EQUIPMENT IN ITS SHIPPING CONTAINER, ITS OVERALL CONDITION SHOULD BE

CHECKED FOR SIGNS OF DAMAGE THAT MIGHT HAVE DAMAGED THE CONTENT. REPORT SUCH

DAMAGE TO THE CARRIER AND TO IXSEA. IT IS HIGHLY RECOMMENDED TO CONTACT THE

INSURANCE COMPANY IN CASE OF ANY DAMAGE.

You have just received your equipment in a wooden transit case. Before starting the

installation, we recommend to check the contents of the pack and the equipment immediately on receipt of your MT912S System. Specifically, you should check that all

items are present on delivery and that none has sustained any damage.

For that, you find a packing-list detailing all the shipped items in the shipping case. This

packing list had been completed and checked for by iXSea shortly before shipment.

II.2 Quick Start

TO AVOID DESTRUCTIVE ELECTRICAL SHOCK ON THE TRANSDUCER, DO NOT

MAKE THE BEACON CONTINOUSLY TRANSMIT ACOUSTICALLY IN THE AIR.

Procedure

Step Action

1. Charge the battery. See section III.2.2.

The MT912S series GAPS beacon is shipped with its internal battery charged but it is

recommended to have the battery pack fully charged before operation.

2. Check with the build sheet that the default configuration is suitable for your application. If

not, set-up the new parameters of the MT912S Transponder/Responder with the MMI

configuration. See section IV.

3. Set the ON/OFF terminal plug on the external connector of the beacon.

MT912S is ON and the unit transmits an acoustic pulse once the power-up steps are

safely completed. If there is still no acoustic transmission, remove the terminal plug, wait

for 3 s and repeat the step 3.

4. Interrogate the MT912S unit in transponder mode by sending a signal (acoustic or

electrical with a wire loop around the transducer using capacitance coupling) with a

frequency generator at the selected receiving channel. Listen to the MF-FSK acoustic

reply pulse transmitted by the unit.

MT912S is ready for deployment.



Step Action

5. Deploy the MT912S. See section III.3.

6. At the end of the operations, recover the MT912S unit. See section III.4.

7. End of procedure.

II.3 Storing Store the MT912S in its original box (see Figure 8) during long and short-term storages.

FOR LONG TERM STORAGE, IT IS RECOMMENDED TO CHARGE THE INTERNAL BATTERY PACK FROM

THE MT912S UNIT.

Locations where temperature ranges between +10°C and +30°C are suitable for long-term

storage. The reason is that long-term storage may accelerate the battery self-discharge

and then lead to the deactivation of reactants.

After a long-term storage, at the first battery charging, the deactivation of reactants may

lead to an increased battery voltage and a decreased battery capacity. Repeat several

cycles of charge and discharge in order to restore the original performances of the

batteries.

Figure 8 – MT912S wooden storage box

II.4 Floating Collar When the MT912S is to be deployed on the sea bottom, it is advisable to use a buoyancy

package to keep it vertical. iXSea proposes a floating collar consisting of two half shells

placed around the transponder housing and fastened by means of bolts and nuts.

Protective eyes are fitted at bottom and top of the floating collar.

Figure 9 – Example of transponder with its floating collar



III OPERATING THE MT912S

TO AVOID DESTRUCTIVE ELECTRICAL SHOCK ON THE TRANSDUCER, DO NOT CONTINUOUSLY

TRANSMIT ACOUSTICALLY IN THE AIR.

USE BY DEFAULT THE 188 DB TRANSMIT POWER RATHER THAN THE 191 DB TO PRESERVE THE

INTEGRITY OF THE TRANSDUCER.

THE MT912S TRANSPONDER IS EQUIPPED OF NIMH RECHARGEABLE BATTERIES.

III.1 Operational Modes The MT912S series unit is can be operated in transponder or responder mode and may

be powered either from internal rechargeable battery pack or from external power supply:

• Transponder mode, triggered by an acoustic signal

• Responder mode, synchronized by an electrical signal via the external connector

Both modes are described in detail at sections I.2.1 and I.2.2. The responder mode is

recommended when the beacon is mounted in noisy acoustic environment and/or

whenever an electrical trigger signal is available via an umbilical from the ships GAPS

Surface System. The different MT912S operating states are listed in Table 9.

Table 9 – Description of the different states

Function or Mode Description

OFF The SUBCONN terminal plug is removed, the power supply is OFF.

ON The SUBCONN terminal plug is in place, the power supply is ON and the unit

transmits an acoustic pulse once the power-up steps are safely completed.

Transponder Mode

The pulse transmission is synchronized with the reception of the trigger frequency.

The beacon transmits a MFSK pulse of code 0 to 9, 22 or 23 after the turnaround

time. The interrogate signal is a 10 ms tonal pulse. Only the acoustic frequency

corresponding to F1/19.5 kHz (respectively F2/20.0 kHz or F3/20.5 kHz or F4/21.0

kHz) allows interrogating the MT912S in transponder mode.

Responder Mode

In this mode, the emission of a pulse is synchronized with the reception of an

electric signal via the 8-points SUBCONN connector. The trigger made of a logic

active and positive signal 0 - 5 V allows the emission of a programmed pulse (code

0 to 9, 22 or 23).

CRF1, CRF2 Reply

Codes

Acoustic M-FSK Signal, wide spectrum bandwidth transmitted by the beacon

CRF1 in responder mode / CRF2 in Transponder mode.

Interaction Responder /

Transponder Each electric trigger inhibits the transponder mode a 25 s period of time.

Optional Pressure

Measurement

Provisional. Upon reception of the interrogation signal, two acoustic CRF replies

are transmitted through the water channel.



III.2 Getting Started with the MT912S In this section, you follow a series of basic procedures that you have to go through in

order to put the MT912S transponder into service.

III.2.1 CHECKING THE PRESSURE RELIEF VALVE

Make sure the pressure relief vent is in closed position and flush with the bottom end-cap.

If not it could indicate a pressure issue during previous operations. The unit should not be

deployed and must be investigated by qualified service personnel.

For safety reasons, the relief valve vents when the internal pressure of the housing is 1

bar ± 20 % greater than the external pressure.

III.2.2 CHARGING THE MT912S

It is recommended to fully charge the Nickel Metal Hydride (NiMH) batteries of the

MT912S before putting them into service, to avoid wasting time if the battery becomes

discharged before the end of the in-water operations. Charging procedure is described in

the section V and could last up to 4 hours.

III.2.3 SETTING UP THE PARAMETERS OF THE MT912S

The MT912S unit is fully field-programmable. This is achieved by using the MMI

configuration software. The programmable parameters to set are as following:

• Responder reply acoustic pulse (1 among 12 MFSK wide spectrum codes)

• Transponder interrogate channel (1 among 4 tonal interrogate channels)

• Transponder reply acoustic pulse (1 among 12 MFSK wide spectrum codes)

• Acoustic transmit power level

• Turn-around time (“Standard” mode or “Fast” mode)

• Blanking time

Refer to section IV for the MT912S configuration with the MMI software

The MT912S beacon is supplied, by default, with a plastic blue colored (except red)

sleeve mounted around the bottom end cap of the housing.



III.2.4 SWITCHING ON THE MT912S

In order to switch ON the MT912S unit, the external 8-way SUBCONN external connector

must be covered while the transponder is submerged:

• Either by the ON/OFF terminal plug with locking sleeve supplied with each transponder

• Or by the in-line plug of an external cable (responder or power cable) with an

appropriate ON-OFF wiring (Pin 1 and Pin 5 must be connected together to switch ON the unit)

The MT912 unit transmits an acoustic pulse once the power-up steps are safely

completed. If there is no acoustic transmission, remove the terminal plug, wait for 3 s and

re-plug it.

When operating in responder mode or from an external power supply, a SUBCONN

MCIL8M connector with an appropriate wiring must be used to cover the MT912S

bulkhead connector. The responder inputs must be connected to the trigger signal from

the GAPS system via the umbilical.

III.2.5 TESTING THE MT912S

A built-in test with the MT912S is available. The unit transmits an acoustic pulse once the

unit is switched ON and power-up steps are safely completed.

After a long period of storage, the internal storage capacitor associated to the acoustic

power amplifier can be fully discharged and the acoustic power level transmitted may be

very low and inaudible. If it is the case, switch OFF the unit, wait for 3 s and repeat the

switch ON operation.

End of Storage

Responder mode can be tested by switching on the unit and sending a 10 ms wide and

positive 5 V pulse on the responder input. The MT912S transmits then a CRF acoustic

pulse.

Responder Mode Test

Test the transponder mode by interrogating the unit at one of the tonal frequencies (19.5,

20, 20.5 or 21 kHz). One can use a frequency generator to send an interrogation signal

(acoustic or electrical with a wire loop around the transducer using capacitance coupling).

Transponder Mode Test

MT912 should transmit an acoustic pulse if the frequency of the interrogation pulse

matches the receiving channel set for the MT912S unit.

Test also the emergency power supply mode. If external power supply is switched OFF,

the MT912S should revert to the internal battery supply and continue to reply either in

responder mode or transponder mode.

Emergency Power Supply



III.3 Mounting Recommendations

MT912S UNIT IS FITTED WITH A POLYURETHANE CAGE FOR PROTECTING THE ACOUSTIC

TRANSDUCER. DO NOT USE THIS CAGE TO SECURE OR HOOK UP THE MT912S UNIT BY

RUNNING A ROPE THROUGH THE HOLES OF THE PROTECTIVE CAGE. THE CAGE IS NOT DESIGNED

TO WITHSTAND SUCH TENSION.

When fitted on an underwater vehicle or structure, the unit must be mounted with the

transducer in an upright position and there must be a clear line of sight between the

MT912S acoustic head and the GAPS antenna installed on the surface vessel. The

transducer must be located above the level of super-structure and any syntactic foam

buoyancy.

Transducer Position

Use a hose clamp, rubber protection and jubilee clips to secure the MT912S unit. Fastening

It is also recommended to avoid transmitting the mechanical vibrations of the

vehicle/structure to the body of the acoustic head:

• With an integral transducer version of the MT912S, use a rubber protection around the

MT9xx tube housing.

• With a remote transducer version of the MT912S, it is recommended to mount the

PET962 remote transducer on the vehicle structure by means of a fiber plate with no

mechanical bypass between the body of remote head and the vehicle structure.

For connections to the MT912S Transponder / Responder refer to rules given in section

III.2.4 and external connector pin-out (see section I.4.5). Connections



III.4 Recovering the MT912S If the unit is operational, it should not require any attention apart washing and charging

and should therefore not be dismantled. Proceed as follows:

Procedure

Step Action

1. Recover the unit on the ship’s deck.

2. Remove the plug from the MT912S external connector to switch OFF the unit.

3. Wash and clean the pressure housing with fresh water to remove salt, sand or silt

especially around the connectors. See section V (procedure PM01).

4. Recharge the internal batteries and then store the unit. See section V (procedure PM02).


From time to time, it is recommended to soak the unit in fresh water for a long period of

time (say 24H) in order to dissolve salt and to diffuse from hard to reach areas such as

crevices / grooves around O-rings and between the mating parts.



IV MMI CONFIGURATION SOFTWARE

IV.1 Installing the MT912S MMI Software on the PC A MMI piece of software is supplied with each MT912S beacon to assist with its

configuration. The program is stored on a CDROM and run on a PC-computer under XP

SP2 Windows operating system. This PC should also be equipped with a USB plug.

This section concerns the software version 1.1.7 or newer.

Procedure

Step Action

1. Insert the provided CD-ROM into your PC workstation.

The installation procedure starts automatically.

2. Follow the installation instructions until completion of the procedure.


IV.2 Connecting the Different Elements

IV.2.1 USING THE USB PORT OF THE PC

Connect the PC computer to the MT912S series Transponder as shown in Figure 10.

Figure 10 – Configuration of the MT912S



USB ports are sensitive to static electricity which can damage the electronic components.

In order to protect your PC, before connecting the cables and devices together, always

touch the metallic chassis of your PC. This will ground any static electricity discharge. Dry

weather conditions or walking across carpeted floors may cause you to acquire

electrostatic charges.

As a protection of your PC computer it is recommended to insert the supplied USB hub

device inside the USB PC port.

Step Action

1. Connect the cable adapter (p/n 4452320) to the MT912S I/O port.

2. Plug the USB hub to the PC USB port.

3. Connect the USB cable to the connection box and to the USB hub.

The MT912S is ready to be configured. Refer to sections hereafter.

4. You can connect the AC/DC power supply otherwise the beacon is internal powered.


If there is no communication between the PC and the MT912S, the batteries are probably

too weak and you need to plug the AC/DC power supply.

IV.2.2 USING THE RS232 PORT OF THE PC

If the PC is equipped of a RS232 port then you can directly connect the MT912S to the

PC by using the responder cable (p/n 9300218). See Appendix B.5.

Procedure



IV.3 MMI Overview Once the MMI is launched, by default the general status tab opens (see Figure 11). The

main window is composed of several areas that are always present (independent of tabs): Main window

• Save to Beacon: once all configuration parameters have been set up, click on this

button to store this data into the transponder.

• Communication Port: manages the communication with the transponder

• Beacon Profile: allows to:

Perform a factory reset

Save the configuration on a disk

Load the configuration from a disk

This tab displays all specific identification data of the beacon (equipment, serial number,

board revision number, FPGA revision number, pressure sensor option). General

Status Tab

Figure 11 – MT912S General Status (Identification) tab

You have access to the configuration parameters by opening the MT9x2 Settings tab (see

Figure 12). The MT9x2 Settings tab is divided in the following areas: MT9x2

Settings Tab

• Responder: reply code

• Transponder: interrogation frequency and reply code

• Time: blanking time and turnaround time

• Acoustic: transmission power level and receiver gain

• Statistics (output): ping counter and maximum deployment pressure (bar)



Figure 12 – MT912S Settings tab



IV.4 List of the MT912S Configuration Parameters The MT912S configuration parameters are listed and described in Table 10.

Table 10 – MT912S configuration parameters

MT912S Configuration

Parameters Values Unit Access

M-FSK codes 0 to 9 and 22 to 23 N.A. Internal

Interrogation frequency F1 = 19.5 F2 = 20.0 F3 = 20.5 F4 = 21.0 kHz Internal

Blanking Time

(See Note below)

From 0.8 to 10 by 0.1 step s Internal

Turn-Around Time

(Transponder/Responder)

Standard mode: 20 to 200 by step of 5

Fast mode (Greater power consumption):

10.8 in Transponder mode

1.5 in Responder mode

ms Internal

Transmit Sound Level 185 / 188 / 191 dB re. 1µPa @ 1m Internal

The default factory set-up for Transponder and Responder modes is:

Table 11 – Default configuration parameters

Transmit Sound Power Level 188 dB ref. 1 µPa @1 m

Turn-around time (transponder / responder) 20 ms (Standard mode)

Interrogation Frequency 19.5 kHz

Transponder reply code Code 22

Responder reply code Code 22

Blanking time 0.8 s

The blanking time adjustment must take first into account the distance to the transponder

and secondly the possible reflections of the interrogating signal. A single interrogation can

generate several answers if the trigger signal is reflected on the seafloor or on the water

surface and if the blanking time is too short. The trigger signal must have completely

vanished before the end of the blanking time.



IV.5 Configuring the MT912S

IV.5.1 SETTING THE COMMUNICATION PORT

The first thing that you have to do to configure the MT912S remote control MMI is to set

up the USB or RS232 communication port through which the data are going to be

transferred.

Figure 13 – Selection of the Communication Port

Procedure

Step Action

1. Run the MT912S MMI application.

2. Left click besides the current selected port and scroll the menu that appears.

3. Select the appropriate port number from the pull-down list in which the MT912S serial

link is connected.

The software looks automatically to connect itself to the MT912S. The MMI opens the

MT9x2S Setting tab and the data fields are filled.


To have access to the general status parameters, open the General Status tab.



IV.5.2 LOADING, SAVING A CONFIGURATION FROM A DISK

Figure 14 – Loading and saving a configuration

Loading

Step Action

1. Click on the Load from Disk button.

A window opens allowing you to browse the folders.

2. Select the configuration file .profil that you want to load.

3. Click on Open.

The configuration is loaded. All parameters are set up on the MMI window.


Saving

Step Action

1. Click on the Save to Disk button.

A window opens allowing you to browse the folders.

2. Select the folder in which you want to save the .profil file.

3. Click on OK.

The configuration is saved.




IV.5.3 RESETTING THE CONFIGURATION

Figure 15 – Selection Factory reset

THE GENERAL RESET BUTTON SETS ALL THE BEACON SETTING PARAMETERS TO THE DEFAULT

FACTORY VALUES. IF SPECIFIC PARAMETERS HAVE BEEN ASKED, USE THE “.profil” FILE OF

THE BEACON.

IV.5.4 SELECTING THE REPLY CODES & TRANSPONDER INTERROGATION CHANNEL

Figure 16 – Selection of the Reply Codes and Interrogation Frequency

In Responder mode:

• Click on the Reply Code dial at the value that you want to set up. The pointer moves

to the chosen value.

In Transponder mode:

• Click on the Interrogation Frequency dial on the proper value. The pointer moves to

the chosen value.

• Click on the Reply Code dial at the value that you want to set up. The pointer moves

to the chosen value.

Reply codes noted 0 to 9 are for provisional use only and are not detected by GAPS

(Version I to III) antenna.



IV.5.5 CONFIGURING THE ACOUSTIC TRANSMIT LEVEL

Figure 17 – Selection of the Acoustic Transmit Power

USE THE 188 DB RATHER THAN THE 191 DB TRANSMIT POWER TO ENSURE THE INTEGRITY OF

THE TRANSDUCER.

Procedure

Step Action

1. Set the Transmit Power level at the value to be selected (191, 188 or 185).


IV.5.6 CONFIGURING THE BLANKING TIME AND TURN AROUND TIME

Figure 18 – Selection of the Blanking Time and Turn Around Time

Procedure

Step Action

1. Set the tab on the Blanking Time ruler at the value to be selected (0.8 s minimum).

2. Set the tab on the Turn Around Time ruler at the value to be selected.

3. If you want to activate the Fast Turn Around mode, select the Fast Turn Around mode

checkbox. This mode requires more energy from the batteries.

Standard Turn Around Time ruler turns grey, inactive and the turnaround time is set to:

• 1.5 ms fixed in responder mode

• 11.3 ms in transponder mode




IV.5.7 COMPUTING STATISTICS

Figure 19 – Statistics on Ping Count and Pressure

It is the counter of the transmitted pulses in steps of a hundred since the previous reset.

Click on Reset after a full recharge of the transponder batteries. Ping Counter

This field displays the maximum pressure reached by the transponder during in-water

operation (provisional and operating only when the pressure sensor option is present).

Click on Reset at the beginning of operation to clear the pressure field.

Max Pressure

IV.5.8 SAVING THE CONFIGURATION TO THE BEACON

Figure 20 – Saving the configuration to the beacon

Click on the Save to Beacon button to store the configuration into the beacon itself. The

beacon is then ready to operate.

IV.5.9 USING THE COMMAND UTILITY TOOL

Press the F1 key to open the Command Utility window as follows:

Figure 21 – Command Utility window



IV.5.9.1 Displaying the Current Voltage

The Diagnostic button is used to control the voltage of the battery with the MMI software.

If you click again, the voltage is measured and displayed again.

Procedure

Step Action

1. Click on the Diagnostic.

The MT9x2 returns:

• The current battery voltage (in V) when the transponder is not being charged or

• The charging voltage (in V) when the charger is connected and is externally powered

2. Press OK to close the Command Utility window.


IV.5.9.2 Displaying the Current Pressure (Optional)

• The Telemetry button is provisional for monitoring the pressure data if the MT9

transponder is equipped of a pressure sensor. The Telemetry button is disabled

(grayed) if there is no pressure sensor.

• Click on the Telemetry button to display the pressure measurement in the Command Utility window.



V MAINTENANCE

There are two preventive maintenance operations to perform on a regular basis with the

MT912S:

PM01: Cleaning the MT912S

PM02: Charging battery of the MT912S

PM03: Releasing possible inner pressure inside the MT9x2

ELECTRONIC DEVICES CAN BE DESTROYED BY STATIC ELECTRICITY. IT IS ESSENTIAL THEREFORE

THAT THE SERVICE ENGINEERS ARE FULLY AWARE OF THE PROTECTIONS AGAINST STATIC

ELECTRICITY.



System: MT912S Preventive Maintenance

Sub-system: Pressure Housing Reference: PM01 Page: 1/1

Subject: Washing the MT912S Periodicity: after each recovery

Duration: 5 minutes

Fresh water, liquid soap for the transducer cap Equipment

Do not use alcohol or petrol-based solvents on the neoprene casing Precaution

None Preliminary Steps

Procedure

Step Action

1. Thoroughly flush the whole unit with seawater. During the retrieval operation, it may

happen that the unit has been collecting foreign particles (sand, mud...).

2. Flush the acoustic release with fresh water when all foreign particles have been

removed.

3. Visually inspect the acoustic transducer for proper condition.

4. Wash the acoustic head with soapy water. If fatty matters or deposits are present (mud),

the neoprene boot should always be free of grease prior to immersion. Do not use

alcohol or petroleum based solvents.

5. Lubricate sparingly the external connector(s) with MOLYKOTE 44 grease or LOCTITE

8021 in spray can, as recommended by the manufacturer (SUBCONN). Refer to

SUBCONN handling procedure at Web site: http://www.subconn.com.






Subject: Charging the Battery of MT912S Periodicity: after each recovery

Duration: up to 4 hours for a full cycle

PERFORM THE CHARGING OF THE BATTERIES IN AN OPEN ENVIRONMENT OR ENSURE A GOOD

VENTILATION OF THE AREA.

MAKE SURE THAT NO OPEN FIRES, SPARKS OR SMOKING TAKES PLACE NEARBY THE

TRANSPONDER. MAKE SURE THE AIR TEMPERATURE OF THE AREA IS BETWEEN 10 AND 40°C.

THE BATTERY MANUFACTURER ENSURES THAT NO GAS IS VENTED BY THE BATTERIES. HOWEVER,

IN CASE OF MAJOR BATTERY FAILURE, IT IS RECOMMANDED TO KEEP CLEAR FROM THE

TRANSPONDER ENDCAP MAIN AXIS DURING CHARGING.

24 V, 36 W, 1.5 A AC/DC power supply and cable adaptor (p/n 4452320).with its

connection box Equipment

None Preliminary Steps

Figure 22 – Charging connections for the MT912S





Subject: Charging the Battery of MT912S Periodicity: after each recovery

Duration: up to 4 hours

Procedure

Step Action

1. Proceed with PM03 to release a possible pressure that could have been accumulated

inside the pressure housing.

2. Plug the charger power supply to the main power supply (110 V – 220 V) and to the

connection box of the cable adaptor (p/n 4452320).

The green LED of the connection box turns green.

3. Plug the cable adaptor to the MT912S.

4. Plug the AC/DC power adapter to the connection box.

The orange LED turns orange, indicating the recharge of NiMH batteries is in progress.

5. Wait until the orange LED turns OFF. It can take approximately up to four hours.

The batteries of the MT912S are charged.

6. Remove the AC power from power supply and then unplug the cable adaptor from the

MT912S unit.

The green LED of the connection box turns OFF.

7. Proceed with PM03 to release the gases that might have been generated during

charging process.




System: MT9x2S Preventive Maintenance

Sub-system: Pressure Vent Reference: PM03 Page: 1/1

Subject: Releasing possible inner pressure Periodicity: after and before each charging procedure

Duration: 30 seconds

One M2.5 screw Equipment

None Preliminary

Steps

Procedure

Step Action

1. Screw the M2.5 screw in the pressure vent.

2. With your fingers, pull the screw a few millimeters in your direction to open the vent and

free the possible inner pressure.

3. Release the screw and unscrew it from the vent.

There is no more over pressure inside the housing.




Customer Support

Customer’s technical support on this product is available:

• by e-mail: [email protected]

• by phone through iXSea 24/7 hot-line:

+33 (0)1 30 08 98 98 for EMEA

+1 888 660 8836 (toll free) for US

+65 6747 7027 for Asia

Contact iXSea support for any request on technical matters related to this product.

iXSea customer’s support commits to provide a quick response to your query.


mailto:[email protected]


Contact iXSea

To obtain information on any iXSea product, a general mailbox is available with the

following address: [email protected]. You can also contact iXSea headquarters in France,

or one of its offices around the world:

Contact Phone Fax

iXSea SAS

FRANCE

Tel. +33 (0)1 30 08 98 88 Fax. +33 (0)1 30 08 88 01

iXSea GmbH

GERMANY

Tel. +49 511 123 59 575 Fax. +49 511 123 59 576

iXSea NORWAY

Tel. +47 55 91 33 60

iXSea bv

THE NEDERLANDS

Tel. +31 23 750 5110

Fax. +31 23 750 5111

iXSea Ltd

UK Portsmouth

UK Aberdeen

Tel. +44 (0) 2392 658252

Tel. +44 1224 355 160

Fax. +44 (0) 2392 658253

Fax. +44 1224 826 622

iXSea inc.

USA Boston

USA Houston

Tel. +1 781 937 8800

Tel. +1 281 681 9301

Fax. +1 781 937 8806

Fax. +1 281 362 2704

iXSea LLC

UNITED ARAB EMIRATES

Tel. +971 4 311 7135

Fax. +971 4 332 8860

iXSea Pte Ltd

SINGAPORE

Tel. +65 6747 4912

Fax. +65 6747 4913

iXSea Pte Ltd

CHINA

Tel. +86 10 6211 4716

Fax. +86 10 6211 4718

iXSea Pty Ltd

AUSTRALIA

Tel. +61 (0) 7 3390 4660

Fax. +61 (0) 7 3390 7242

A detailed description of our products and a list of our representatives are available on our

website: www.ixsea.com


mailto:[email protected]

http://www.ixsea-oceano.com/


Appendices

A. PRINCIPLE OF FAST CHARGING MT9X2 TRANSPONDERS

The fast charge is controlled by electronics inside the MT9x2 housing which automatically

senses the presence of DC adapter and battery insertion or removal.

Charging process is also gated by minimum (+5°C) and maximum (40°C) temperature

limits.

The fast charger monitors the voltage and temperature parameters of the battery pack.

Heavily discharged batteries are first precharged with a trickle current.

After the precharge state, the fast charging (at 2.8 A current) begins. The charger

controller can simultaneously use the following fast charge termination techniques.

• -∆V change of voltage indicated that the pack is approaching the full charge.

• Rate of temperature rise (∆T/∆t) with time

• A time limit is exceeded (3 hours)

If necessary a top-off charge is automatically applied at a trickle current to the NiMH pack

after the fast charging is completed.



B. MECHANICAL DRAWINGS

B.1 Technical Label

B.2 References Mechanical drawing of the remote transducer PET962S See section B.3 940 0067 (Page 1/1)

Interconnection cable of the remote transducer PET962S See section B.4 930 0212

Responder cable for MT912S See section B.5 930 0218

Overall dimensions of the MT912S-R See section B.6 445 9100 (Page 1/3)

Main assembly drawing of the MT912S-R See section B.6 445 9100 (Page 2/3)

Overall dimensions of the MT912S/HD-R: See section B.7 445 9110 (Page 1/3)

Main assembly drawing of the MT912S/HD-R: See section B.7 445 9110 (Page 2/3)



B.3 Transducer PET 962S (P/N 940 0067)

Figure 23 – SUBCONN BH3M wiring

Figure 24 – PET962S mechanical drawing



B.4 Cable for Remote Transducer (SUBCONN Connectors) 4-core cable with common shield, rated voltage 1,000 VRMS recommended (600 VRMS

acceptable for short transmission time). Type of Cable

3 m Length

p/n: 930 0212 Reference

Figure 25 – Wiring of the cable for the remote transducer



B.5 Responder Cable for MT912

AXON ZN2019-MSTMR7 (iXSea ref.: CA7-9EP) 7 twisted core cable with common shield Type of Cable

p/n: 9300218 Reference

Male Face View

1 - Brown Ground supply

2 - Red External supply

3 - Grey (–) Responder

4 - Yellow (+) Responder

5 - connected to pin 1 (ON/OFF function)

6 - Tx – RS232

7 - Rx – RS232

8 - Not connected

SUBCONN Micro series Plug (8 pin Male) Mating Connector: MCOM8M plug, MCOMB boot and 2140U compound

Locking sleeve: MCDLSF Red /+24v

Brown / Gnd

Yellow / (+) Responder Grey / (-) Responder

3 m RS232



B.6 Mechanical Drawing of MT912S-R





B.7 Mechanical Drawing of MT912S – R / HD




MU_MT9_FR

Documents

command utility window

window opens allowing

ac dc power supply

general status tab

mt912s users manual

main assembly drawing

external power supply

preventive maintenance reference