Ise System Messages - wtw pH/ION 340i Operating Manual

pH/ION 340i
Error message 0FL
Error message E3
Concentration
display flashes
6.2

ISE system messages

0FL
0FL 0FL
Cause
Ion-selective electrode:
– Not connected
– Cable broken
E3 E3 E3
Cause
Ion-selective electrode:
– Slope not in the range
50 ... 70 mV or
23 ... 35 mV
– Moisture in the plug
– Electrode obsolete
– Electrode broken
Measuring instrument:
– Calibration procedures:
Incorrect order of the
standards with 3-point
calibration
– Socket damp
Cause
In measurement:
– The measured value is outside
the range determined through
calibration
In calibration:
U2 U1
–
U3 U2
–
≤
5mV
≤
5mV
What to do if...
Remedy
– Connect the electrode
– Replace the electrode
Remedy
– Replace the electrode
– recalibrate
– Dry plug
– Replace the electrode
– Replace the electrode
– Select the correct order
– Dry socket
Remedy
– Select the calibration
standards so that the
measured value is in between
them
– Calibration standards lie too
closely together. Select other
calibration standards
67