Xylem ProLab 4000 MULTIPARAMETER BENCHTOP METER - Manual (Page 88)

pH ProLab 4000
88 ba75646e02 01/2010
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>.