Xylem handylab pH 12 User Manual
Page 30
Operation
handylab pH 12
30
ba75368e04
01/2011
Three-point
calibration
Note
You can prematurely terminate the three-point calibration by pressing <M>.
The values of the two-point calibration for slope and asymmetry will then re-
main stored.
12
Press the <RUN/ENTER> key
to continue the three-point calibration.
Cd3 appears on the display.
13
Thoroughly rinse the electrode with distilled water.
14
If necessary, enter the temperature of the third buffer solution
with <
▲> <▼>.
15
Immerse the pH electrode in the third buffer solution.
16
Press the <RUN/ENTER> key.
The AR display indicator flashes.
The electrode voltage (mV) or the buffer nominal value ap-
pears on the display.
When the measured value is stable, AR disappears.
The instrument displays the value of the slope (mV/pH) and the
evaluation of the calibration in calibration range II.
17
Press the <RUN/ENTER> key.
The instrument displays the value of the asymmetry in calibra-
tion range II. The three-point calibration is completed.
18
To return to the measuring mode: Press the <M> key.