Xylem WTW OxiTop-IDS Multi 3630 IDS, Руководство по эксплуатации, Страница: 38 / 118

pH value Multi 3630 IDS
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ba77170e03 10/2017
5.2.5 Calibration points
Calibration can be performed using one to five buffer solutions in any order (sin-
gle-point to five-point calibration). The meter determines the following values
and calculates the calibration line as follows:
5.2.6 Calibration data
The calibration data can be displayed and then output to the interface.
Displaying the
calibration data
The calibration protocol of the last calibration is available in the menu Calibra-
tion / Calibration record . To open it in the measured value display, press the
<CAL_> key.
24 Set the nominal buffer value for the measured temperature with
<

><

> .
25 Accept the calibration value with <ENTER> .
The calibration display for the next buffer appears (voltage display).
26 If necessary, use <M> to finish the calibration.
The calibration record is displayed.
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.
Determined values Displayed calibration data
1-point Asy  Zero point = Asy
 Slope = Nernst slope
(-59.2 mV/pH at 25 °C)
2-point Asy
Slp.  Zero point = Asy
 Slope = Slp.
3-point to
5-point Asy
Slp.  Zero point = Asy
 Slope = Slp.
The calibration line is calculated
by linear regression.
You can display the slope in the units, mV/pH or % (see section
11.1.1).