User Manual

Maintenance a n d Troubleshooting 8-25
Problem
Range from ul t rasonic dept h subsyst em is significantly
greater than manuall y measured range.
Possible
Causes
Physic al of fset may be inc orrec t.
Pipe height may be inc orrec t.
Sensor may not be level.
Foam or ot her substance may be abs orbi ng t he pul se.
Sensor may be faulty.
Possible
Solutions
Verify the physi cal off set.
Verify the pi pe hei ght.
Make sure the sensor is level and i n good condition.
Check the hydrauli c condit i ons in the pipe.
Fire the sens or at a shorter di s tance onto a hard surface
to confi rm accuracy.
Replace the sensor.
Contact your regional ADS representative.
Problem
Range from t he ul trasonic depth subsys tem i s too short
(but not zero).
Possible
Causes
Physic al of fset may be inc orrec t.
Pipe height may be inc orrec t.
Sensor m ay be di rt y.
Sensor m ay be f aul ty.
Possible
Solutions
Verify the physic al offset.
Verify the pi pe hei ght .
Clean the sensor.
Replace the s ensor.
Contact your regional ADS repres entative.