ADS Environmental Services FlowShark QR 775002 A4 - Manual (Page 235)

Maintenance and Troubleshooting 10-23
Problem Ultrasonic depth readings are erratic.
Possible
Causes
Noise may exist in the sewer pipe.
Ultrasonic depth sensor may be dirty.
Flow may be choppy or foamy.
Ultrasonic depth sensor may not be level.
Possible
Solutions
Check the flow conditions.
Clean the ultrasonic depth sensor.
Check the level of the ultrasonic depth sensor.
Problem Ultrasonic depth sensor reports abnormal temperatures.
Possible
Causes
Ultrasonic depth sensor connection to monitor may be
loose.
Temperature sensor may be faulty.
Temperature offset may be incorrect.
Ultrasonic depth sensor may be faulty.
Possible
Solutions
Secure ultrasonic depth sensor connection to monitor (if
necessary).
Verify temperature offset.
Replace the ultrasonic depth sensor.
Doppler Velocity Subsystem
The following tables contain general troubleshooting techniques for
the Doppler velocity subsystem.
Note: Contact your regional ADS representative for
further diagnosis prior to replacing a sensor.