wtw inoLab 740, Руководство по эксплуатации

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What to do if...
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14.4 Ion concentration system messages
Measuring modules for the inoLab Level 3:
pH, pH/ION, pH/Cond, pH/Oxi and Multi.
Error message
OFL
Error message
E3
Cause Remedy
Ion-sensitive electrode or
reference electrode
– Not connected – Connect electrode
– Cable broken – Replace electrode
Cause Remedy
Ion-sensitive electrode:
– Slope is not in the range
50 ... 70 mV or
23 ... 35 mV
– Replace electrode
– Recalibrate
– Moisture in the plug – Dry plug
– Electrode obsolete – Replace electrode
– Measurement in a range for
which the cell is not suitable
– Use a suitable electrode
Measuring instrument:
– Calibration procedure:
Wrong sequence of
standards for three point
calibration
– Select correct
sequence
– Socket damp – Dry socket