ADS Environmental Services ADS TRITON+ QR 775027 A3 - Manual (Page 364)

Maintenance and Troubleshooting 10-43
Problem Range from ultrasonic depth subsystem is significantly
greater than manually measured range.
Possible
Causes
Physical offset may be incorrect.
Pipe height may be incorrect.
Electronic offset may be incorrect.
Sensor may not be level.
Foam, extreme condensation, or other substance may
be absorbing the pulse.
Sensor may be faulty.
Possible
Solutions
Verify the physical offset.
Verify the pipe height.
Verify electronic offset and adjust if necessary.
Make sure the sensor is level and in good condition.
Check the hydraulic conditions in the pipe.
Fire the sensor at a shorter distance onto a hard surface
to confirm accuracy.
Clean/dry the sensor.
Replace the sensor.
Contact your regional ADS representative.