Owner's manual

pH/ 3400i What to do if...
67
6.2 ISE system messages
Error message 0FL
0FL0FL
0FL
Error message E3
E3E3
E3
Concentration
display flashes
Cause Remedy
Ion-selective electrode:
– Not connected – Connect the electrode
– Cable broken – Replace the electrode
Cause Remedy
Ion-selective electrode:
– Slope not in the range
50 ... 70 mV or
23 ... 35 mV
– Replace the electrode
– recalibrate
– Moisture in the plug – Dry plug
– Electrode obsolete – Replace the electrode
– Electrode broken – Replace the electrode
Measuring instrument:
– Calibration procedures:
Incorrect order of the
standards with 3-point
calibration
– Select the correct order
– Socket damp – Dry socket
Cause Remedy
In measurement:
– The measured value is outside
the range determined through
calibration
– Select the calibration
standards so that the
measured value is in between
them
In calibration:
– Calibration standards lie too
closely together. Select other
calibration standards
U2 U1– 5mV≤
U3 U2– 5mV≤