ADS Environmental Services FlowShark QR 775003 A2 - Manual (Page 212)

Maintenance and Troubleshooting 8-27
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 the level of the sensor.
Problem Ultrasonic depth sensor reports abnormal temperatures.
Possible
Causes
Sensor connection to monitor may be loose.
Temperature sensor may be faulty.
Sensor may be faulty.
Possible
Solutions
Secure the sensor connection to monitor (if necessary).
Replace the sensor.
IS 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.