Pt4 - Transmit Path; Table 25: Pt3 Failure; Table 26: Pt4 Failure - Teledyne WORKHORSE Operation Manual

WorkHorse H-ADCP Operation Manual
PT3 failure description - You can determine beam failure results ($>0, see
by the individual bit settings:
Table 25: PT3 Failure
Bit # PT3 Failure Description
0 Low Correlation – Correlation at lag 1 is <70% (130 counts).
1 High Correlation - A correlation at lag 7 or above is >63 counts.
2 High Noise Floor - Noise floor for high gain is >59.
3 Low Differential Gain – Noise floor difference between high and low gains is less than 5 dB (10 counts).
The H-ADCP should be in non-moving water during this test to get valid test results.
A functional H-ADCP may fail high correlation or high noise floor when this test is run in air due
to interference. This test should be run in the deployed environment to achieve good results.

PT4 - Transmit Path

This test displays transmit path characteristics. During the test, the H-ADCP pings and measures the
resulting transmit current and voltage. For example:
>PT4
IXMT = 2.0 Amps rms
VXMT = 74.0 Volts rms
Z = 37.6 Ohms
Transmit Test Results = $0 ... PASS
The H-ADCP should be in non-moving water during this test to get valid test results.
PT4 failure description - You can determine failure results ($>0 see
individual bit settings:
Table 26: PT4 Failure
Bit # PT4 Failure Description
0 ADC TIMEOUT ERROR - The DSP Board ADC was not ready for reading when the CPU was ready to read the ADC.
1 TRANSMIT TIMEOUT - The DSP Board never indicated completion of transmission.
2 SAMPLE TIMEOUT - The DSP Board never indicated completion of sampling.
3 LCA REGISTERS CORRUPTED - The DSP Board timing registers lost their value after pinging.
4 OVER-CURRENT SHUTDOWN
5 OVER-TEMPERATURE SHUTDOWN
6
INCORRECT TRANSDUCER IMPEDANCE - Impedance (Vxmt / Ixmt) was too high (>200Ω) or too low (<20Ω).
7 LOW TRANSMIT VOLTS AND/OR CURRENT - Transmit voltage was too low (Vxmt <10V) and/or transmit current too low (Ixmt
<0.1A).
The H-ADCP should be in non-moving water during this test to get valid test results.
The test failure example shown below is what you would see for a missing or improperly attached transmit
cable (see Troubleshooting a Built-In Test Failure).
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
PT Test Results Error
PT Test Results Error Codes) by the
May 2015
Codes)
Page 161