Manual

Maintenance and Troubleshooting 7-9
Troubleshooting
Error Possible Reason Potential Corrective Measures
No Indication of Flow
(0 or ----)
Connections Check the sensor cable connection to the
unit.
Sensor Check sensor installation for proper
orientation toward the flow and horizontal
position.
Check the sensor for dirt, blockage,
sedimentation (covering the sensor), or
damage.
Replace the sensor if necessary.
Flow Depth
Measurement
Note: When no flow depth exists, measuring
flow velocity is not possible.
Water-ultrasonic measurement: Check the
sensor for horizontal installation.
Pressure cell measurement: Inspect the
sensor for blockage.
Air-ultrasonic or external depth
measurement: Check sensor for function
and signal transmission. Inspect cables,
clamped connections, short circuits, and
contact resistances. Check for sensor
function through the I/O > Sensors > H-
Sensor > Echo profile menu.
Check depth measurement parameter Fixed
level for full pipes without a depth
measurement.
Transmitter Check error memory. Proceed based on
error message (e.g., checking cables and
sensor installation) or contact ADS (for a
CPU or DSP error).
Programming Check all the parameter settings for the
transmitter.