ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 337)

Maintenance and Troubleshooting 8-53
Problem UpDepth data seems erratic over a full depth range.
Possible
Causes
Sensor transmit/receive surfaces may be dirty.
Sensor may be rotated greater than 15 degrees from
center.
Sensor may be faulty.
Processor board may be faulty.
Possible
Solutions
Clean the sensor transmit/receive surfaces.
Check the sensor connections.
Ensure the sensor is installed as closely as possible to
the 6:00 position in the pipe, silt allowing.
Contact your regional IETG representative.
Replace the sensor.
Replace the monitor if defective.
Problem UpDepth readings are abnormally low.
Possible
Causes
Sensor transmit/receive surfaces may be covered with
silt.
Sensor may be physically offset in the flow and the
correct physical offset has not been measured and/or
downloaded to the monitor.
Possible
Solutions
Re-measure physical offset of the sensor.
Check the site conditions, and relocate the sensor if
necessary.