ADS Environmental Services ADS TRITON+ QR 775027 A3 - Manual (Page 372)

Maintenance and Troubleshooting 10-51
Problem Velocity data does not fluctuate much (but is not 0).
Possible
Causes
Sensor may be dirty.
Minimum flows may be occurring within the sensor
deadband (extending 1.0 inches (25 mm) up from the
bottom of the Peak Combo Sensor).
Velocity function may be broken.
Possible
Solutions
Clean the sensor’s transmit/receive surfaces.
Verify that minimum flows are occurring outside the
sensor deadband.
Check the sensor connections.
Check the velocity parameters.
Contact your regional ADS representative.
Replace the velocity sensor.