Endress+Hauser Nivotester FTC325 Operating Instructions Manual page 36

en - Trouble-shooting
Note!
A new calibration is necessary
if the electronic insert of the
probe was exchanged.
23
A
36
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
incorrectly for limit signal in Nivotester
Permanent Device configuration changed
alarm signal unintentionally
Device configuration changed
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
possible when insert is exceeded in the covered
probe is covered condition
Remedy
Check power
Replace Nivotester
Replace Nivotester;
connect a fuse into contactor circuit
Replace measuring transmitter
Correctly set change-over switch behind
front panel
Restore original condition
Press correction key for 3 s
Check line
Replace measuring transmitter
electronics
Replace Nivotester
Check connecting wires
Check connection from electronic insert
to the probe
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
Endress+Hauser