Trouble-Shooting - Endress+Hauser Nivotester FTC325 3-WIRE Operating Instructions Manual

Fault Reason
Does not switch No power
(green LED does not light up)
Nivotester defect
Contacts welded together
(after short-circuit)
Measuring transmitter defective
Switches Incorrect setting of change-over switch for
incorrectly limit signal in FTC325
Permanent alarm Device configuration changed unintentionally Restore original condition
signal
Interrupt or short-circuit line to measuring
transmitter
Measuring transmitter electronics defective
Nivotester defective
Fault indicator Probe circuit
flashes (probe, electronic insert or two-wire cable)
Calibration not The measuring range of the electronic insert
possible when is exceeded in the covered condition
probe is covered
23 . . .
Endress+Hauser
Remedy
Check power
Replace Nivotester
Replace FTC325;
connect a fuse into contactor circuit
Replace measuring transmitter
Correctly set change-over switch behind
front panel
Check line
Replace measuring transmitter electronics
Replace Nivotester
Check probe for grounding
(Rnom > 200 kOhm)
Replace electronic insert and recalibrate
After the LED goes out, recalibrate and
check function
Calibrate with uncovered probe
Check probe for grounding
en - Trouble-shooting
Note!
A new calibration is necessary:
- if the electronic insert of the
probe was exchanged.
For the adjustment, the switch
must be turned to the leftmost
position
35