wtw pH 3210, Руководство по эксплуатации

Страница: 64 / 78

What to do if... pH 3310
64 ba75802e02 12/2008
No stable measured
value
Sensor symbol flashes
Display
Cause Remedy
pH combination electrode:
– Junction contaminated – Clean junction
– Membrane contaminated – Clean membrane
Test sample:
– pH value not stable – Measure with air excluded if
necessary
– Temperature not stable – Adjust temperature if
necessary
Combination ele 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
)