Xylem HandyLab 100 - Manual (Page 56)

What to do if... HandyLab 100
56 ba77062d01 03/2014
No stable measured
value
Sensor symbol flashes
Display
Cause Remedy
pH electrode:
– Junction contaminated – Clean the junction
– Membrane contaminated – Clean membrane
Test sample:
– pH value not stable – Measure with air excluded
if necessary
– Temperature not stable – Adjust temperature if nec-
essary
Electrode + test sample:
– Conductivity too low – Use suitable electrode
– Temperature too high – Use suitable electrode
– Organic liquids – Use suitable electrode
Cause Remedy
– Calibration interval expired – Recalibrate the measuring
system
Cause Remedy
– Batteries almost empty – Replace the batteries (see
section 5.1 M AINTENANCE )