Xylem MultiLab 4010-3 - Manual (Page 35)

MultiLab 4010-3 pH value
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Continuing with
three- to five-point
calibration
5.2.5 Calibration points
Calibration can be performed using one to five buffer solutions in any order
(single-point to five-point calibration). The meter determines the following
values and calculates the calibration line as follows:
20. Thoroughly rinse the sensor with deionized water.
21. Immerse the sensor in the next buffer solution.
22. When measuring without temperature sensor:
Enter the temperature of the buffer with <><>.
23. Start the measurement with .
The measured value is checked for stability (stability control).
The [AR] status indicator is displayed. The measured parameter
flashes.
24. Wait for the measurement with stability control to be completed or ter-
minate the stability control and take over the calibration value with
.
The pH value of the buffer solution is displayed.
25. Set the nominal buffer value for the measured temperature with
<><>.
26. Accept the calibration value with .
The calibration display for the next buffer appears (voltage display).
27. If necessary, use to finish the calibration.
The calibration record is displayed.
or
Continue calibrating using the next buffer with .
After the fifth buffer has been measured the calibration is automat-
ically finished. Then the calibration record is displayed.
The calibration line is determined by linear regression.
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