testo 252 Bedienungsanleitung Seite 95

pH measurement
Manual calibration with any chosen buffer solutions
°
Confirm your entry with Enter. The temperature
input is allocated to buffer 1.
A buffer of pH 7.00 will be suggested. You can
correct the value by using the arrow keys. Enter
the pH value corresponding to the temperature .
(The temperature variation of the solution is
indicated on the buffer bottle).
Confirm the corrected buffer value with the Enter
key.
CAL flashes during calibration (duration of
calibration: min. 20 sec, max. 10 min).
A signal sounds the end of the calibration
procedure.
Should the calibration procedure end abruptly after
max. 10 minutes, the electrode is probably
damaged (see pages 29 - 32 and 70 - 71 for error
messages and remedies) . Contact our service
department if you have any problems.
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