Xylem CG 843 - Manual (Page 32)

Operation
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4.3.3 AutoCal DIN
Use two or three different DIN buffer solutions for this proce-
dure in increasing or decreasing order.
Note
Steps 2, 6 and 13 are not required if you use a temperature
probe.
DIN buffer solution pH
A 1.68
C 4.01
D 6.87
F 9.18
1 Press the <CAL> key repeatedly until Cd1 and the
AutoCal DIN 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,
Cd2 ap-
pears.