ADS Environmental Services FlowShark QR 775002 A4 - Manual (Page 233)

Maintenance and Troubleshooting 10-21
Problem Range from ultrasonic depth subsystem is significantly
greater than manually measured range.
Possible
Causes
Temperature or physical offset(s) may be incorrect.
Pipe height may be incorrect.
Sensor may not be level.
Foam or other substance may be absorbing the pulse.
Sensor may be faulty.
Possible
Solutions
Verify the temperature and physical offsets.
Verify the pipe height.
Make sure the sensor is level and in good condition.
Check the hydraulic conditions in the pipe.
Fire the ultrasonic depth sensor at a shorter distance
onto a hard surface to confirm accuracy.
Replace the sensor.
Contact your regional ADS representative.
Problem Range from the ultrasonic depth subsystem is too short
(but not zero).
Possible
Causes
Temperature or physical offset(s) may be incorrect.
Pipe height may be incorrect.
Ultrasonic depth sensor may be dirty.
Ultrasonic depth sensor may be faulty.
Possible
Solutions
Verify the temperature and physical offsets.
Verify the pipe height.
Clean the ultrasonic depth sensor.
Replace the ultrasonic depth sensor.
Contact your regional ADS representative.