4 concal – Xylem CG 843 User Manual

Page 35

Operation

103

4.3.4 ConCal

Two-point

calibration

Use two buffer solutions for this procedure:

pH 7.0 ± 0.5

any other buffer solution

Note
Steps 2 and 9 are not required if you use a temperature
probe.

1 Press the 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 first buffer solution

pH 7.0 ± 0.5.

4 Press the 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 key.

The value of the asymmetry (mV) and the sensor
symbol appear on the display.

7 Press the key.

SLO

(pe) appears on the display.