wtw pH 3110 - No Stable Measured Value; Sensor Symbol Flashing; LoBat Display Indicator

What to do if... pH 3110
40
ba75791e02 11/2008
No stable measured
value
Sensor symbol flashes
Display,
LoBat
Cause Remedy
pH combination electrode:
– Diaphragm contaminated – Clean diaphragm
– Membrane contaminated – Clean membrane
Test sample:
– pH value not stable – Measure with air excluded if
necessary
– Temperature not stable – Adjust temperature if
necessary
Combination electrode + test
sample:
– Conductivity too low – Use suitable combination
electrode
– Temperature too high – Use suitable combination
electrode
– Organic liquids – Use suitable combination
electrode
Cause Remedy
– Calibration interval expired – Recalibrate the measuring
system
Cause Remedy
– Batteries almost empty – Replace the batteries (see
section 5.1 M
AINTENANCE)