pH
ProLab 4000
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7.3.4
Calibration interval
The calibration interval and calibration evaluation are indicated on the
display as the CalClock.
CalClock
The remaining time of the calibration interval is indicated by the seg-
mented ring around the calibration evaluation. This segmented ring
reminds you to calibrate regularly.
The CalClock appears on a red square after the specified calibration
interval has expired. It is still possible to measure.
Setting the calibration
interval
The calibration interval is set to 7 days in the factory.
You can change the interval (1 ... 999 days):
Note
To ensure the high measuring accuracy of the measuring system, cal-
ibrate after the calibration interval has expired.
1
Highlight the channel of the electrode in the measured value
display.
2
If necessary, select the pH display with
<MODE>
.
3
Open the input window for the calibration intervals with
Calibra-
tion
/
Calibration interval...
.
4
Enter the calibration interval with
<0...9>
.
5
Confirm the setting with
<OK>
.
Содержание ProLab 4000
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Страница 86: ...pH ProLab 4000 86 ba75646e03 12 2012 Note A calibration line is determined for the two point calibration...
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