SECTION VIII
TROUBLESHOOTING
General
There are few adjustments for echo processing and they should be used judiciously.
Transducer location and aiming are the most important factors affecting the reliability of
the HydroRanger I.
Location and aiming of the transducer may be optimized by
pressing to view the confidence level while in the RUN mode. In the CALIBRATE
mode, the same can be achieved by observing the echo confidence, P-80 and
pressing .
Oscilloscope
An oscilloscope can be used to view the transmit, receive and processed echo signals.
Connect as follows:
oscilloscope location description
probe - J1, RCVR, board A - amplified receiver signal
- J2, SCOPE, board A - processed echo
- TB1-8, board B - raw transmit/receive signal
external trigger - J3, SYNC, board A - oscilloscope synchronization
ground - J4, COM, board A - ground
The transmit and receive signals are best viewed while in the run mode or with P-94,
transmitter test, set to fire automatically in the calibrate mode. This may be useful when
aiming the transducer to obtain the best echo.
To view the processed echo, P-79 must be set for the desired display. If the
CALIBRATE mode is exited for more than 10 minutes, P-79 will have to be reset to view
the displays on the oscilloscope.
The processed echo can be viewed and updated by pressing . This must be
done while in the calibrate mode, but can be done while viewing any parameter. For
example, echo analysis parameters 79-84 or echo processing parameters 85-87 can
be viewed or changed while monitoring results on both the HydroRanger I display and
on the oscilloscope.
8
MEAS
MEAS
PL-399 8 — 1
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