pH/Cond 3320 pH value
ba77054e03 03/2018 31
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:
21. Thoroughly rinse the electrode with deionized water.
22. Immerse the electrode in the next buffer solution.
23. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
24. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.
25. Wait for the measurement with stability control to be completed or termi-
nate the stability control and take over the calibration value with
<ENTER>.
The calibration display for the setting of the nominal buffer value appears.
26. Set the nominal buffer value for the measured temperature with
< >< >.
27. Accept the set calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
28. Use <M> to finish calibration or
Continue calibrating using the next buffer with <ENTER>.
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.
pH
9.958
24.8 °C
ConCal
3
15.02.2014
14:15
Buffer
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