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Xylem CG 842 User Manual

Page 25

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Operation

68

Calibration

evaluation

After the calibration, the instrument automatically evaluates
the current status. The asymmetry and slope are separately
evaluated. The worst evaluation appears on the display.

Display

Asymmetry

[mV]

Slope

[mV/pH]

-15 ... +15

58 ... 60.5

-20 ... +20

57 ... 58

-25 ... +25

56 ... 57
or
60.5 ... 61

Clean the electrode accor-
ding to the electrode opera-
ting manual

-30 ... +30

56 ... 50
or
61 ... 62

Clear the fault according to
chapter 6 W

HAT

TO

DO

IF

...

< -30 or
> 30

< 50 or
> 62

1 Switch on the instrument by pressing .

2 Connect the pH electrode to the instrument.

3 Keep the buffer solutions ready.

4 Adjust the temperature of the solutions and measure

the current temperature if the measurement is per-
formed without a temperature probe.

Preparatory

activities