ADS Environmental Services Model 4000 530017 A0 - Manual (Page 107)

Maintenance and Troubleshooting 5-21
Problem Temperature reading from the pressure depth sensor
shows a value of -273
° C (-459° F).
Possible
Causes
Cable connecting the pressure sensor to the monitor
may be loose or broken.
Pressure sensor may be faulty.
Depth board is not responding or may be faulty.
Possible
Solutions
Secure pressure sensor connection to monitor (if
necessary).
Replace the pressure sensor.
Replace the depth board.
Problem Pressure depth readings are consistently incorrect.
Possible
Causes
Coefficients may be incorrect.
Pressure dryer tube may not be functioning properly.
Possible
Solutions
Retrieve or enter the correct coefficients, and reactivate
the monitor.
Inspect and replace (if necessary) desiccant in pressure
dryer tube.
Problem Pressure depth readings are consistently off by up to 3
inches (7.62 cm), but temperature readings are
accurate.
Possible
Cause
Monitor may be configured with an incorrect pressure
sensor offset.
Possible
Solution
Enter an offset to depth for consistency with confirmation
readings.