ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 336)

8-52 IETG FlowHawk Manual
Upward Depth Subsystem
The following tables contain general troubleshooting techniques for
the upward depth subsystem corresponding to the Peak Combo
Sensor and Slimline Peak Combo Sensor.
Note: Contact your regional IETG representative for
further diagnosis prior to replacing a sensor.
Problem UpDepth data periodically reads 16 mm (0.63 in).
Possible
Causes
Minimum flows are occurring within sensor deadband
(extending 25 mm (1.0 in) up from bottom of Peak
Combo Sensor or Slimline Peak Combo Sensor) or the
sensor is receiving a strong return signal close to the
sensor face.
Sensor transmit/receive surfaces are dirty.
Sensor or cabling might be faulty.
Possible
Solutions
Verify minimum flow depths are not occurring within
sensor deadband.
Set the deadband on the UpDepth sensor to a setting
other than Auto, but well below the expected minimum
flow depth. Fire the sensor several times to verify
whether the readings improve.
Ensure the sensor is installed as closely as possible to
the 6:00 position in the pipe, silt allowing.
Clean the sensor transmit/receive surfaces.
Inspect the sensor cables for integrity.
Check for moisture in the connector.
Contact your regional IETG representative.
Replace the sensor.
Replace the monitor if defective.