Xylem CG 842 - Manual (Page 30)

Operation
73
4.3.3 ConCal
Two-point
calibration
Use two buffer solutions for this procedure:
l pH 7.0 ± 0.5
l any other buffer solution
Note
Steps 2 and 9 are not required if you use a temperature
probe.
1 Press the <CAL> key repeatedly until ASY and the
ConCal function display appear.
2 If necessary, set the temperature of the buffer solu-
tion by pressing < ▲ > < ▼ >.
3 Submerse the pH electrode in the pH 7.0 ± 0.5 buffer
solution.
4 Press the <run/enter> key.
The measured pH value appears on the display.
5 Set the nominal pH value of the buffer solution (at the
current temperature) by pressing the < ▲ > < ▼ > keys.
6 Press the <run/enter> key.
The value of the asymmetry (mV) and the sensor
symbol appear on the display.
7 Press the <run/enter> key.
SLO(pe) appears on the display.