Instruction Manual
OCM F
OCM F - Rev. 04 as of 18.02.2014
Page 89
Unstable measure-
ment values
Hydraulically unsuita-
ble measurement
place
Check quality of measurement place by using the
graphic frequency group distribution display. Relo-
cate the sensor to a hydraulically more suitable
place (extend calming section).
Remove soiling, sedimentation or obstructive con-
structions in front of the sensor.
Straighten the flow profile by installing appropriate
baffle plates and calming elements, flow straight-
eners or similar upstream of measurement.
Increase damping.
Sensor
Check sensor installation (towards flow direction,
horizontal installation).
Check sensor for sedimentation or obstructions.
Implausible measure-
ment values
Hydraulically unsuita-
ble measurement
place
See "Unstable measurement values“.
External level signals
Check for correct connection.
Check if cables are crushed, for short circuits and
improper resistive loads or current consumers
without galvanic isolation.
Check measurement range and span.
Check input signal in I/O menu.
Sensor
Check for correct connection.
Check if cables are crushed / for extensions/cable
types, short circuits, surge arresters or improper
resistive loads.
Check level signal, echo profile, flow velocity
signal, cable parameters and temperature in
I/O menu.
Check if sensor is installed on a vibration-free
place. Check sensor installation (towards flow di-
rection, horizontal installation), check sensor for
soiling.
Programming
Check if the correct shape of measurement place
has been set, check dimensions (observe units),
sensor type, sensor installation height etc.
Faulty Digital output
Connection
Check connections on terminal clamp strip.
Check power supply of external control relays.
In I/O menu check signals to be output.
Check output control function in calibration menu.
Summary of Contents for osm-f
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