Xylem PH3210 FIELD PH METER - Manual (Page 57)

pH 3210 What to do if...
57 ba75793e02 12/2008
6 What to do if...
Error message
OFL, UFL
Error message
Error
Cause Remedy
pH combination electrode:
– Measured value outside the
measuring range
– Use suitable combination
electrode
– Air bubble in front of the
junction
– Remove air bubble
– Air in the junction – Extract air or moisten
junction
– 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
– Junction contaminated – Clean junction
– 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