Xylem WTW pH/ION 3310, Operating Manual

Page: 66 / 78

What to do if... pH/ION 3310
66
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No stable measured
value
Obviously incorrect
measured values
Cause Remedy
Electrode:
– Junction contaminated – Clean junction
– Membrane contaminated – Clean membrane
Test sample:
– pH value not stable – Measure with air excluded if
necessary
– Temperature not stable – Temper if necessary
Ele test sample:
– Conductivity too low – Use suitable combination elec-
trode
– Temperature too high – Use suitable combination elec-
trode
– Organic liquids – Use suitable combination elec-
trode
Cause Remedy
Electrode:
– Electrode unsuitable – Use suitable combination elec-
trode
– Temperature difference between
buffer and test sample too great
– Adjust temperature of buffer or
sample solutions
– Measurement procedure not suit-
able
– Follow special procedure