Instruction Manual

Operation Lab 870
32
ba75555e04 11/2009
4.4.2 Automatic calibration (AutoCal)
For this procedure, use one, two or three buffer solutions of the
selected buffer set in any order.
Note
The steps 2, 6 and 10 are not necessary if you use a temperature
sensor.
1 Start the calibration with <CAL>.
The number of the specified buffer set is displayed (SET 1 ...
16). For ID sensors, the number of the buffer set used last is
displayed.
The first buffer (BUFFER 1) of the buffer set (SET_x) is
requested.
2 If necessary, set the temperature of the buffer solution with
<▲><▼>.
3 Immerse the pH electrode in the first buffer solution.
4 Start the measurement with <OK>.
The SC display indicator flashes.
Depending on the setting, the display shows the nominal pH
value for the recognized buffer or the electrode voltage (mV).
As soon as a stable value is recognized, the next buffer
(BUFFER 2) is requested.
8
5
2
1
1
°
C
TP
AutoCal
pH
SET
BUFFER