ADS Environmental Services FlowShark QR 775003 A2 - Manual (Page 214)

Maintenance and Troubleshooting 8-29
Problem Velocity sensor data seems erratic.
Possible
Causes
Sensor may be dirty.
Sensor may be faulty.
Analog board may be faulty.
Possible
Solutions
Clean the sensor.
Check the sensor connections.
Check the velocity parameters.
Contact your regional ADS representative.
Replace the sensor.
Replace the monitor if defective.
Problem Velocity sensor readings are abnormally high.
Possible
Causes
Sensor may be covered with silt.
Sensor may be out of the flow.
Flow may be reversed or slower than 0.5 ft/s (0.15 m/s).
Possible
Solutions
Check the site conditions, and relocate the sensor if
necessary.
IS Pressure Depth Subsystem
The following tables contain general troubleshooting techniques for
the pressure depth subsystem.
Note: Contact your regional ADS representative for
further diagnosis before replacing a sensor.