testo 252 Bedienungsanleitung Seite 90

* the outlined instrument displays are not valid when a separately connected or integrated
temperature sensor is used.
18
Automatic calibration with specified buffer solutions
*
°
1 point calibration
The temperature specification, previously used in
the measurement mode, is displayed. You have to
correct the temperature value using the arrow
keys.
The input of a temperature value is necessary:
- as the buffer values are temperature
dependent (see the Chapter on buffer
solutions).
- so that the pH electrode is temperature
compensated.
Confirm your entry with Enter. The temperature
input is allocated to buffer 1.
The display sequence that follows contains the
last buffer solution used, as a suggestion for this
calibration. You can select all the buffer solut-
ions stored in the memory of the instrument
(offered by the manufacturer of the instrument) via
the arrow keys.
Confirm the selected buffer with the Enter key.
pH measurement