testo 252 Bedienungsanleitung Seite 103

Error 6
Cause: The maxium set tolerance of the pH
electrode (10 min) was exceeded during
calibration. Should this occur several
times, the electrode is worn and must
be replaced.
Error 8
Cause: The slope S
distinguishes itself by more than 3%
from the slope S
(only relevant with 3 point calibration).
You may have confirmed an incorrect
buffer. Repeat calibration. Should this
error repeat itself, the electrode is faulty
and must be replaced.
pH measurement
pH error messages
in the alcaline range
b
in the acidic range
a
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