Manual

pH 3110 What to do if...
39
ba75791e02 11/2008
6 What to do if...
Error message
OFL, UFL
Error message
CalError
Cause Remedy
pH combination electrode:
– Measured value outside the
measuring range
– Use suitable combination
electrode
– Air bubble in front of the
diaphragm
– Remove air bubble
– Air in the diaphragm – Extract air or moisten
diaphragm
– Cable broken – Replace combination
electrode
– Gel electrolyte dried out – Replace combination
electrode
Cause Remedy
pH combination electrode:
– The values determined for zero
point and slope of the
combination electrode are
outside the allowed limits.
– Recalibrate
– Diaphragm contaminated – Clean diaphragm
– Combination electrode broken – Replace combination
electrode
Buffer solutions
– Incorrect buffer solutions – Change calibration
procedure
– Buffer solutions too old – Use only once.
Note the shelf life
– Buffer solutions depleted – Change solutions