KROHNE OPTIMASS with MFC 300 EN - Manual (Page 140)

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Display Messages Description Possible causes, remedial action
SE Data Different
Sensor electronics configuration does
not match MFC300 Sensor or converter has been changed. See
section 11.4.
COMM FAIL
Communications failure with the sensor
electronics. Measurement data not
available
Check wiring. Check grounding.
Replace electronics
Active settings
Fault detected during CRC check of
active settings Upload Backup 1 or Backup 2 settings,
check and adjust if necessary.
Factory settings
Fault detected during CRC check of fac-
tory settings
Backup 1 / 2 set-
tings Fault detected during CRC check of
Backup 1 / 2 settings
Store active settings in Backusp 1 / 2.
Status: S _ _ _ _
Out of specification,
Measurement continues but measured
values are uncertain Maintenance necessary!
Out of specification
Out of specification: measurement con-
tinues with less accuracy Group message, when faults as below or
other influences occur.
Overflow, counter
1/2/3 Counter has overrun and started again
at zero.
Check counter format
Backplane invalid
The data record on the backplane is
invalid. The CRC check has revealed a
fault.
Save data again to backplane (Service)
SE PCB
Temperature Temperature on SE PCB is exceeding
maximum limit
Check process & ambient temperature.
Check wiring.
Replace sensor electronics
Start Up Sensor is in start up phase
Check process conditions (air)
Check meter settings C1.7.1 to C1.7.3
Check sensor resistances
Power Fail
For custody transfer application.
Indicates a failure of power supply. No
measurement is possible during power
failure
Tube Temperature
Process temperature is outside limits of
sensor.Failure of sensor may occur if
prolonged.
Check settings C1.7.04 & C1.7.05
Reduce process temperature
Density Process density over range Check process conditions
Temperature Drift
Operating temperature has drifted by
>
30 deg C from temperature at zero
calibration.
Perform new zero calibration to maintain
accuracy.
Sensor Signal Error DC component of sensor signal too high
Check sensor resistances
Replace sensor
Resistance Sensor
Defective
PT500 sensor defective. Temperature
measurement & compensation unreli-
able
Check sensor resistances.
Replace sensor