Xylem SI Analytics Lab 865, Руководство по эксплуатации

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pH value Lab 865
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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:
5.2.6 Calibration data
Displaying the cali-
bration data
The calibration record of the last calibration is to be found under the menu item,
<F1> / [Menu] Calibration / Calibration record . To open it, press the <CAL__>
key in the measured value display.
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.
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 lin-
ear regression.
You can display the slope in the units, mV/pH or % (see section
7.1.1 C
HANGING THE SETTINGS FOR P
H
MEASUREMENTS
, page 37).
The calibration record is automatically transmitted to the interface
after calibrating.