Xylem CG 842 - Manual (Page 26)

Operation
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4.3.1 AutoCal TEC
Use any two of the Technical Buffer Solutions for this proce-
dure.
Note
Steps 2 and 6 are not required if you use a temperature
probe.
1 Press the <CAL> key repeatedly until Ct1 and the
AutoCal TEC function display appear.
2 If necessary, set the temperature of the buffer solu-
tion by pressing < ▲ > < ▼ > .
3 Submerse the pH electrode in the first buffer solution.
4 Press the <run/enter> key.
AR flashes on the display.
The electrode voltage (mV) appears on the display.
As soon as a stable value is recognized, Ct2 ap-
pears.
5 Thoroughly rinse the electrode with distilled water.