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Sonavision Ltd.

Aberdeen, Scotland

Issue 6

2392-31-0008

Page 2 of 19

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31/03/10

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The latest issue of this document is held in electronic form.

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COPYRIGHT © SONAVISION LIMITED

AUGUST 2008

The copyright in this document is the property of Sonavision Limited. The document
is  supplied  by  Sonavision  Limited  on  the  express  terms  that  it  may  not  be  copied,
used,  or  disclosed  to  others  except  as  authorised  in  writing  by  Sonavision  Limited.
Sonavision  Limited  reserves  the  right  to  change,  modify  and  update  designs  and
specifications as part of their ongoing product development programme.

TECHNICAL SUPPORT

Address

Sonavision Limited
Unit 12 Energy Development Centre
Aberdeen Science and Energy Park
Bridge of Don
Aberdeen
AB23 8GD
Scotland

Telephone

+44 (0)1224 707737

Fax

+44 (0)1224 827290

Email

[email protected]

Website

www.sonavision.co.uk

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Summary of Contents for 2392 mercury

Page 1: ...STALLATION MANUAL DETAILS OF THE EQUIPMENT PART NUMBER 2392 01 0001 DESCRIPTION MERCURY SONAR OPERATING AND INSTALLATION MANUAL APPROVALS ORIGINATOR R J HARDIE ENGINEER PRODUCTION R J HARDIE ISSUE LEVEL ISSUE 6 ISS DATE DESCRIPTION BY CHK 0 DRAFT FOR APPROVAL 1 RELEASE FOR PRODUCTION ...

Page 2: ...upplied by Sonavision Limited on the express terms that it may not be copied used or disclosed to others except as authorised in writing by Sonavision Limited Sonavision Limited reserves the right to change modify and update designs and specifications as part of their ongoing product development programme TECHNICAL SUPPORT Address Sonavision Limited Unit 12 Energy Development Centre Aberdeen Scien...

Page 3: ...repaid 2 This warranty does not cover defects which are caused as a result of improper usage repair maintenance alteration or installation unless such activities have been undertaken by Sonavision Limited or its authorised representative 3 On completion of any warranty work Sonavision Limited will return the equipment freight prepaid 4 Sonavision Limited retains the sole right to accept or reject ...

Page 4: ...aim SAFETY CONSIDERATIONS In Service Safety Considerations The sonar unit operates from low voltage DC electrical supplies and will not normally present a shock hazard to users if a fault occurs Underwater if divers are present they should be advised not to come into contact with the unit with power applied The metal parts of the sonar housing are electrically isolated from the internal power supp...

Page 5: ...31 0008 Page 5 of 19 The unit should not be disposed of by fire There is a risk of explosion due to the air trapped within the pressure housing The oil filling in the hood should be drained and disposed in a safe and environmentally friendly manner ...

Page 6: ...ECIFICATION 1 3 GENERAL ARRANGEMENT Section 2 0 SYSTEM INSTALLATION 2 1 INTRODUCTION 2 2 PACKING UNPACKING 2 3 INSTALLATION 2 4 ROUTINE MAINTENANCE Section 3 0 DRAWINGS AND TABLES 3 1 TABLE 1 CONNECTOR PIN OUT TABLE 2 RS232 SYSTEM WIRING TABLE 3 RS485 SYSTEM WIRING 2 WIRE Section 4 0 SERVICE PROCEDURES 4 1 ASSEMBLY AND DIS ASSEMBLY 4 2 COMMUNICATIONS INTERFACE ...

Page 7: ...interfaces to ROV systems or short cable lengths 1 2 SPECIFICATION The subsea unit is a one atmosphere pressure vessel containing all the electronic modules A piezo electric composite transducer is located at the upper end and rotates on the shaft of a miniature stepper motor The transducer stepper motor head position sensor and slipring are all immersed in oil within the transducer hood which pro...

Page 8: ...r All of these components are within the polyurethane hood and the cavity is oil filled to protect the components from sea water and provide depth compensation The end cap contains glass metal seal assemblies which allow transfer of the electrical signals from the end cap components into the dry housing containing the electronic assemblies The chassis is a machined component which holds a total of...

Page 9: ...ber Optic Technology RS232 3 Wire RXD TXD GND Suited for systems with built in data telemetry systems which require RS232 protocol This protocol is not suitable for driving long cables but may be used in test installations with cable lengths limited to a few tens of metres The line drivers and receivers are optically isolated from the rest of the sonar electronics to reduce the possibility of inte...

Page 10: ...Ensure the cable whip is terminated to the supply dc power and communication in either half duplex or full duplex mode according to the factory setting of the unit Connection details for the 6 way connector are shown in TABLE 1 e Check and clean the sonar unit mating area of the connector then lightly grease with silicon grease Dow Corning MS4 silicon compound or equivalent the face of the cable w...

Page 11: ... Blue 2 24v 24v 24v White 4 RS485 TX RX Rx RXD Green 3 RS485 TX RX Rx COM Red 1 Tx Black 6 Tx TXD Brown TABLE 2 RS232 System wiring signal connections only Use this data to check end to end on an ROV to see that all signal connections are correctly made through the umbilical and interconnects PC COM Port Pin No Signal Name Sonar Conn Pin No N C 1 V Supply 2 5 GND RS232 3 3 RXD 4 0V 5 2 TXD 6 1 1 1...

Page 12: ...PCB s carefully by pulling away from the boards underneath to disconnect the inter board mating connectors Remove the two wiring looms to the end cap terminating in connectors on the CPU board by carefully extracting the connectors from their sockets on the board Remove the wiring loom to the end cap terminating in a connector on the TX RX board by carefully extracting the connector from its socke...

Page 13: ...ghten the TRANSDUCER PCB assembly to the shaft using the M3 socket set screw Do not over tighten to avoid stripping the threads and make sure that the screw contacts the flat on the shaft normal to its surface e Fit the hood and hood clip The hood clip is tensioned using a pair of pincers on the tensioning loop Tighten as tightly as possible without damaging the clip to avoid oil leaks f Remove th...

Page 14: ...nch up in the base of the housing whilst inserting the electronic assembly When the wires are correctly routed push the end cap into the housing after checking the O rings and press home carefully without distorting the hood Locate the chassis studs through the two holes in the housing and centralise Insert the seal screws and tighten gently to draw the end cap fully into the housing DO NOT OVERTI...

Page 15: ...ated to a good ground point generally at one end of the cable only RS485 4 WIRE COMMUNICATIONS RS485 4 wire communication is available but is rarely used since performance improvements are minimal Occasionally this format is used with an ROV fitted with optical fiber multiplexer units RS232 COMMUNICATIONS RS232 communications is a new feature in the MERCURY sonar It allows the sonar to be directly...

Page 16: ...ed out by following the procedures in section 4 1 of this manual This should only be attempted by an experienced person since poor workmanship which leads to failure of the sonar unit will not be covered by the manufacturers warranty The links which require changing are on the PSU board This is the outer board to which the connector on the housing mates It also has two large electronic modules in ...

Page 17: ...Sonavision Ltd Aberdeen Scotland Issue 6 2392 31 0008 Page 17 of 19 ...

Page 18: ...Sonavision Ltd Aberdeen Scotland Issue 6 2392 31 0008 Page 18 of 19 ...

Page 19: ...Sonavision Ltd Aberdeen Scotland Issue 6 2392 31 0008 Page 19 of 19 END OF DOCUMENT ...

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