ADS Environmental Services FlowAlert QR 775011 A2 - Manual (Page 185)

7-20 ADS FlowAlert Manual
General Pressure Depth Problems
The following tables contain general techniques for troubleshooting
pressure depth.
Warning: Contact your regional ADS representative for
further diagnosis before replacing a pressure depth sensor.
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 color of desiccant in dry tube and replace the
dryer tube (if necessary).
Problem Pressure depth readings are consistently off by up to 3
inches, but temperature readings are accurate.
Possible
Cause
Monitor may be configured with an incorrect pressure
sensor offset.
Possible
Solution
Re-measure pressure sensor physical offset and enter
correct value in Profile. Reactivate the monitor.
Enable Auto-Pressure Calibration feature in Profile to
calibrate the pressure sensor data to the ultrasonic data
during non-surcharge conditions.