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OCF 6.1 Open Channel Flow Monitor
FIELD TROUBLESHOOTING
SYMPTOMS
CHECK
Display - full scale
A
- zero
B
- erratic - random
C
- drifting up
D
- drifting down
E
ECHO LOSS
prompt - flashing
F
Calibration Non-Linear
H
SYMPTOMS
FAULTS
SOLUTIONS
Unit “See’s” Wrong Target Due To:
A,F
- sensor cover not removed
- remove protective cover after installation
A,C,D,F - sensor not aimed correctly
A,D,F
- dust/dirt buildup on sensor
- clean
carefully
(do not scratch sensor face)
A,D,F
- condensation on sensor
- lower Sensor
- insulate sensor mounting location
- increase
Min Range
(
CALIBRATION
menu) by
1-3” / 2.5-7.5 cm
- wipe sensor face and body with Rain-X
A,D
- sensor mounting stand pipe
- too long / - too narrow
- dirty / - gasket intruding
- lower Sensor below stand pipe intrusion
C,E,F
- very turbulent flow in open channel
- increase
Damping
(
CALIBRATION
menu)
- install stilling well on flume or weir
C,E,F
- very turbulent level in tank
- increase
Damping
(
CALIBRATION
menu)
- change tank fill method
Unit Picks-Up Interference Due To:
A,C
- noise from high pressure fill
- install submerged fill pipe
A,D
- sensor coupling over tightened
- hand tighten only (like a light bulb)
A,D
- sensor coupling not used
- use coupling supplied
C
- other ultrasonic unit in close
proximity
- synchronize
Electrical interference: