testo 252 Bedienungsanleitung Seite 91

°
Continue
calibration:
2/3 point
calibration
Automatic calibration with specified buffer solutions
CAL flashes during calibration (duration of
calibration: min. 20 s, 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.
1 pt calibration ok?
Cancel
CAL dAtA
page 49
Measuring mode
2 point/3 point calibration
Should you require a more accurate calibration,
continue calibration.
You will be asked for the temperature value after
every further point of calibration. Correct if
necessary with the arrow keys, confirm the entry
with Enter.
pH measurement
Press the page key to
cancel the calibration mode
1 point calibration has been
completed. This is the
quickest way of adapting the
instrument to the pH electrode
(accuracy after 1 point
calibration: approx. ± 0.1 pH
units). A slope of -58 mV/pH
(25 °C) is assumed and only
the zero point is calibrated.
You can return to the
measuring mode via the
display of the calibration data
(please read about the
importance of the calibration
data on page 49).
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