Troubleshooting A Beam Failure - Teledyne WORKHORSE Operation Manual

WorkHorse H-ADCP Operation Manual

Troubleshooting a Beam Failure

The PC1 test is designed to measure the relative noise in the environment and then have you apply more
noise by rubbing the ceramics with your hand. Sometimes your hand does not generate enough noise for
the system to detect. This could be due to the environment you are in or for other reasons. A simple, safe,
and easy to find material that works very well as a replacement to your hand is packaging material (a.k.a.
bubble wrap). Using this instead of your hand will very likely provide enough relative frictional difference
for the system to pass.
If the PC1 test fails, your system may still be okay. In this case deploy the H-ADCP into a bucket or con-
tainer of water (preferably at least 0.5 meters deep). Record some data using BBTalk and the log file (F3
key), or record data straight to the recorder card if your H-ADCP has one. Then look at the data using the
WinADCP program and make sure that the echo amplitude counts in the 1st depth cell for all beams is
between 128 and 192. If they are not, contact Field Service for further troubleshooting tips.
If the beam continuity test still fails and/or the echo amplitude indicates a problem, a bad DSP board, Re-
ceiver board, PIO board, or a bad beam may cause the failure. If replacing the DSP and PIO board (in-
cluded with the spare boards kit) does not fix the problem, the H-ADCP must be returned to TRDI for re-
pair.
>PC1
BEAM CONTINUITY TEST
When prompted to do so, vigorously rub the selected
beam's face.
If a beam does not PASS the test, send any character to
the H-ADCP to automatically select the next beam.
Collecting Statistical Data...
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Rub Beam 1 = PASS |
Rub Beam 2 = PASS |
Rub Beam 3 = PASS |
|
> |
This test must be performed with the H-ADCP out of water and preferably dry.
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NOTE – Possible cause of failure
DSP Board
Receiver Board
PIO Board
Beam
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
42 41 46 44 42
May 2015
Page 89