Polatrak Deep C Meter 300 AD, Operation Manual, Page: 14 / 16

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Telephone: +1 (713) 983 7117
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Email: sales@stoprust.com
© 2015 Deepwater Corrosion Services Inc. Specifications subject to change without notice
Deep C Meter 300 AD™ operation manual
14
SMB-001 Deep C Meter 300 AD Manual
Table 6 - Troubleshooting quick guide
Symptom Possible problem Action
Instrument will not pass
calibration tests
(Section 7)
One electrode is bad See section 11.2.
Zinc coupon is passive (more
positive than (-) 1.000V)
Remove zinc coupon and clean with file or
sandpaper
Readings more positive than (-)
1.000V
Inspect the tip wire for any damage.
Electrodes are dry Allow to soak for 30 minutes and retry
Readings more negative than (-)
1.100V
Issue the Cal! command through the RS232
interface.
Both electrodes reading low Tip wire damaged Remove probe tail assembly, unplug tip wire,
remove nose cone, inspect tip wire and repair
with ScotchKote® as a temporary measure.
Order replacement nose cone.
Readings are not steady and
continue to change.
Poor structure contact Re-stab to ensure contact.
One reading suddenly goes
less negative
Connector is flooded. Check connectors.
Lead wire (flying lead) is nicked. Inspect and repair / replace as necessary.
Displays are blank Whip is cut or power polarity is
inverted.
Check cabling and wiring.
Displays are too dim or
blurry
Intensity is set too high or low for the
available camera.
Increase intensity of light shining on meter.
Adjust the intensity using the command line.
See Table 5 - RS232 Command List
Garbled data stream output Ground fault or improper shielding Ensure RS232 signal ground and power
ground are tied together subsea. Ensure
RS232 signal ground is connected topside.
No data stream output Broken wire in whip Perform a loop-back test to verify
communications. Visually inspect whip for
damage.
Incorrect port Perform a loop-back test to verify
communications.
Swapped transmit / receive Try swapping the transmit and receive wires on
topside connection.
Voltage on transmission line Insert a null modem between ROV and
computer
If problem persists or is not listed, please call our hotline at (713) 983-7117 and ask for Polatrak
technical support.
14. Spare parts and accessories
14.1 The Deep C Meter 300 AD is shipped in a waterproof transit case and contains the following
spares and accessories. Please contact your Deepwater representative to order additional spares if
required.
14.1.1 Zinc calibration block (1)
14.1.2 Contact tips (3)
14.1.3 Lens retaining screws (4)