Calibration Points; Calibration Data - Xylem SL Analytics Lab 865 Operating Manual

pH value
Displaying the cali-
bration data
30
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.

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:
Determined
values
1-point Asy
2-point Asy
Slp.
3-point to Asy
5-point Slp.
You can display the slope in the units, mV/pH or % (see section
7.1.1 C
HANGING THE SETTINGS FOR P

5.2.6 Calibration data

The calibration record is automatically transmitted to the interface
after calibrating.
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.
Displayed calibration data
 Zero point = Asy
 Slope = Nernst slope
(-59.2 mV/pH at 25 °C)
 Zero point = Asy
 Slope = Slp.
 Zero point = Asy
 Slope = Slp.
The calibration line is calculated by lin-
ear regression.
H
MEASUREMENTS
Lab 865
, page 37).
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