ADS Environmental Services ADS TRITON+ QR 775027 A3 - Manual (Page 366)

Maintenance and Troubleshooting 10-45
Problem Depth data indicates a surcharged pipe, but the pipe is
free flowing.
Possible
Causes
Physical offset may be incorrect.
Electronic offset may be incorrect.
Pipe height may be incorrect.
Sensor may be dirty.
Sensor may be faulty.
Possible
Solutions
Verify the physical offset and the pipe height.
Verify electronic offset and adjust if necessary.
Clean the sensor.
Contact your regional ADS representative.
Replace the sensor.
Replace the monitor if defective.
Problem Ultrasonic depth readings are erratic.
Possible
Causes
Noise may exist in the sewer pipe.
Sensor may be dirty.
Flow may be choppy or foamy.
Sensor may not be level.
Possible
Solutions
Check the flow conditions.
Clean the sensor.
Check if the sensor is level and correct if necessary.
Change the power Mode in the sensor parameter
settings to determine whether the readings improve. If
the readings improve, reactivate the monitor with the
new setting.