Valeport MIDAS WLR Hardware Manual
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Valeport MIDAS WLR Hardware Manual

Seabed tide recorder
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This confidential document was prepared by the staff of Valeport Limited, the Company, and
is the property of the Company, which also owns the copyright therein. All rights conferred
by the law of the copyright and by virtue of international copyright conventions are reserved
to the Company. This document must not be copied, reprinted or reproduced in any material
form, either wholly or in part, and the contents of this document, and any method or
technique available therefrom, must not be disclosed to any other person whatsoever
without the prior written consent of the Company.
Valeport Limited,
St Peters Quay,
Totnes,
Devon, TQ9 5EW,
UK
As part of our policy of continuous development, we reserve the right to alter, without prior
notice, all specifications, designs, prices and conditions of supply for all our equipment.
Copyright ©2007
M
WLR Hardware Manual
IDAS
VALEPORT LIMITED
M
IDAS
Seabed Tide Recorder
Hardware Manual
0730877
D
February 2007
Page 1
WLR
Tel:
+44 (0)1803 869292
Fax:
+44 (0)1803 869293
e-mail:
sales@valeport.co.uk
Web:
www.valeport.co.uk
© Valeport Limited
0730877D.doc

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Summary of Contents for Valeport MIDAS WLR

  • Page 1 Date: February 2007 This confidential document was prepared by the staff of Valeport Limited, the Company, and is the property of the Company, which also owns the copyright therein. All rights conferred by the law of the copyright and by virtue of international copyright conventions are reserved to the Company.
  • Page 2 © Valeport Limited WLR Hardware Manual Page 2 0730877D.doc IDAS...

  • Page 3: Table Of Contents

    © Valeport Limited CHAPTER DESCRIPTION PAGE INTRODUCTION ....................4 Contact Information ..................4 SPECIFICATIONS ....................5 Sensor Specifications ..................5 Mechanical Specifications ................6 Performance Specifications ................6 Sample Lifetime Calculations ................. 7 2.4.1 Based on Memory ..................7 A Note About Removable Memory ..............8 2.4.2...

  • Page 4: Introduction

    If you have any questions about the operation of the instrument, which are not answered by this manual, please contact your supplier if appropriate, or contact Valeport Ltd directly at the address given at the front of this manual. WLR Hardware Manual Page 4 0730877D.doc...

  • Page 5: Specifications

    © Valeport Limited SPECIFICATIONS SENSOR SPECIFICATIONS The unit is fitted with the following sensors: Pressure Type: Temperature Compensated Piezo-Resistive Sensor Various available, 10Bar (approx 100m water depth) to 600Bar Range: (approx 6000m water depth) Precision: ± 0.01% Full scale (±1cm for 10Bar sensor, ±0.6m for 600Bar) Resolution: 0.001% Full scale (1mm for 10Bar sensor, 6cm for 600Bar)

  • Page 6: Mechanical Specifications

    Connectors 10 pin female Subconn bulkhead type (MCBH10F) with lock ring. Instrument: Valeport 3m Y lead. 10 pin male Subconn line type (MCIL10M) to Comms Cable: instrument, 2 x 4mm bunch pins to external power, 9 pin female D type to PC.

  • Page 7: Sample Lifetime Calculations

    © Valeport Limited SAMPLE LIFETIME CALCULATIONS 2.4.1 BASED ON MEMORY Lifetime based on memory is simple to calculate. Pressure values use 4 bytes of memory per sample, and temperature uses 2 bytes. Therefore total memory used per record is 4 + 2 = 6 bytes.

  • Page 8: A Note About Removable Memory

    © Valeport Limited A NOTE ABOUT REMOVABLE MEMORY We are sometimes asked whether we offer these devices with removable memory. The answer is no we don’t, but there are sound reasons for this. It is natural to think that since removable memory cards are now the norm in consumer electronics, they must be “state of the art”...

  • Page 9: Based On Batteries

    This is equivalent to approx 90 days. For Lithium cells, a similar calculation gives approx 215 days. The above examples are intended as guides only. Valeport accepts no responsibility for variation in actual performance. Note that performance of individual battery cells is not always consistent.

  • Page 10: A Note About Rechargeable Cells

    © Valeport Limited A NOTE ABOUT RECHARGEABLE CELLS We are often asked if rechargeable cells can be used. Yes, it is possible to use rechargeable cells, but we do not recommend it: Firstly, the cells cannot be recharged in-situ due to the possibility of the cells •...

  • Page 11: Installation

    © Valeport Limited INSTALLATION The standard system is supplied in an ABS transit case, together with any communications adaptors ordered. Any additional lengths of signal cable are packed separately. COMMUNICATIONS WITH PC The M WLR can be set up and interrogated using the DataLog Express software IDAS supplied.

  • Page 12: Deploying The Midas Wlr

    For real time data output, connect the signal cable to the 10 pin Subconn connector on the instrument. All Valeport signal cables include a suspension point for strain relief, and a similar arrangement is recommended for other cable types. Connect the top end of the cable to a PC using the appropriate method as described above.

  • Page 13: Recovery

    © Valeport Limited RECOVERY On recovery, data can be extracted to PC via the 3m Y lead. This procedure is covered in the separate software manual for DataLog Express. To prolong the lifetime of the instrument the following procedures should be carried out once the instrument has been recovered: Remove any significant growth from the instrument.

  • Page 14: Maintenance

    © Valeport Limited MAINTENANCE The M WLR is completely solid state, and therefore requires very little IDAS maintenance. Other than keeping the instrument relatively clean (as described in Section 3.3, Recovery), the only procedure that the customer will be required to carry out on a regular basis is to change the batteries.
  • Page 15 © Valeport Limited 2. Remove the 3 M5 x 20 socket cap screws in the connector bulkhead, using the Allen key provided. 3. Without twisting or putting undue stress on the Subconn connector slide the bulkhead and attached battery pack out of the main housing.

  • Page 16: Seals

    © Valeport Limited SEALS The M WLR is kept watertight by using o-ring seals and anti-extrusion rings. IDAS Double o-ring seals are used at each end of the housing, although the customer should have no reason to open any seal other than that at the battery end.

  • Page 17: Anti-Extrusion Rings

    4.2.2 ANTI-EXTRUSION RINGS It is common Valeport practice to fit Anti-Extrusion Rings, also known as AE Rings or Backing Rings, to o-ring seals on deep water instrumentation. The function of an AE Ring is to prevent the o-ring from being squeezed out of its groove under high pressure.

  • Page 18: Wiring Information

    © Valeport Limited WIRING INFORMATION SWITCH PLUG 10 Way Male Function Subconn Link to Pin 10 Link to Pin 1 3M Y LEAD (RS232) 10 Way 1m Power 1m Data 9 Way D Male 3m Cable Banana Function Cable Cable...

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