23
Attention
Please check the following before fault diagnosis:
Supply voltage:
Is the conductivity transmitter supplied with the mains voltage specified on the name plate?
Wiring:
Does the wiring conform to the wiring diagram?
Fault indications and troubleshooting
Indications, diagnosis and remedies
Fault indications
The equipment is not working accurately
Error
Remedy
Dirt on transmitter measuring electrode(s).
Clean measuring electrode(s)
(see Maintenance)
Spacer disc PEEK
8
has shifted out of place.
LRGT
16-2 only
Push spacer disc down to the sensor tip.
(Fig. 5,
page 12
)
Indicated conductivity reading is higher than meas-
ured comparison value.
Reduce temperature coefficient T
k
during commissioning.
Reduce cell constant during operation.
Indicated conductivity reading is lower than measured
comparison value.
Increase temperature coefficient T
k
during commissioning.
Increase cell constant during operation.
Measuring result cannot be adjusted by changing the
cell constant.
Remove conductivity transmitter and clean measuring
surface/measuring electrodes.
The equipment fails to work
Error
Remedy
Power failure
Switch on supply voltage. Check all electrical connections.
Faulty electronic circuit board
Check and/or replace electronic circuit board (page 25).
The earth connection to the vessel is interrupted.
Clean seating surfaces and screw in conductivity transmit-
ter together with sealing ring 33 x 39, form D, DIN 7603,
1.4301, bright annealed. Do not insulate the electrode
thread with hemp or PTFE tape
Note
If the indicated conductivity cannot be explained or you cannot rule out a previous
modification to the cell constant, reset this constant to the default factory setting. See
Adjusting the cell constant.
After the reset, please carry out commissioning once more.
