10 what to do if, 1 ph, 1 no stable measured value – Xylem inoLab 7110 WASTEWATER pH METER User Manual
Page 38: 2 error message calerror, What to do if, No stable measured value, Error message calerror, Ee section 10 w
What to do if...
pH 7110
38
ba75925e02
12/2011
10
What to do if...
10.1
pH
10.1.1
No stable measured value
10.1.2
Error message CalError
More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
Cause
Remedy
• Junction of the electrode contami-
nated
• Clean the junction
• Glass membrane of the electrode
contaminated
• Clean the glass membrane
Cause
Remedy
• pH value of the test sample not
stable
• Measure with air excluded if
necessary
• Temperature of the test sample
not stable
• Adjust temperature if necessary
Cause
Remedy
• The values determined for zero
point and slope of the electrode
are outside the allowed limits.
• Recalibrate
• Junction contaminated
• Clean the junction
• pH electrode broken
• Replace the pH electrode