JUMO dTRANS pH 02, Operating Manual, Page: 54 / 136

8 Calibrating a pH measurement chain
54
✱
Set the displayed value to the buffer solution value with the or keys;
then press to continue.
✱
Use the key to accept the zero point or the key to reject it.
The device returns to measuring mode.
8.4 2-point calibration
✱
Make preparations, see chapter 8.2 "General information", page 51 .
✱
Start calibration, see chapter 8.2.2 "Ways to start the calibration", page 52.
✱
Select 2-point calibration.
✱
Immerse the combination electrode in the first buffer solution with the
known pH value.
PGM
PGM EXIT
If the following permissible limits of the calibration values are not observed in
the calibration procedure then an error is displayed at the end of the proce-
dure:
Antimony electrode:
-2 ... 2 pH
Standard glass electrode 5 ... 9 pH
The buffer solutions (reference solutions) used for calibration must differ by at
least 2 pH!
During the calibration, the temperature of the two buffer solutions must be
identical and remain constant!