What To Do If - wtw pH 3110 Operating Manual

pH 3110
Error message
OFL, UFL
Error message
CalError
ba75791e02 11/2008
6

What to do if...

Cause
pH combination electrode:
– Measured value outside the
measuring range
– Air bubble in front of the
diaphragm
– Air in the diaphragm
– Cable broken
– Gel electrolyte dried out
Cause
pH combination electrode:
– The values determined for zero
point and slope of the
combination electrode are
outside the allowed limits.
– Diaphragm contaminated
– Combination electrode broken
Buffer solutions
– Incorrect buffer solutions
– Buffer solutions too old
– Buffer solutions depleted
What to do if...
Remedy
– Use suitable combination
electrode
– Remove air bubble
– Extract air or moisten
diaphragm
– Replace combination
electrode
– Replace combination
electrode
Remedy
– Recalibrate
– Clean diaphragm
– Replace combination
electrode
– Change calibration
procedure
– Use only once.
Note the shelf life
– Change solutions
39