Xylem HandyLab 600 - Manual (Page 30)

pH value HandyLab 600
30 ba77064e01 03/2014
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
22. Set the nominal buffer value for the measured temperature with
<><>.
23. Accept the calibration value with .
The calibration display for the next buffer appears (voltage display).
24. 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.
Calibration 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
7.1.1 S
ETTINGS FOR P H MEASUREMENTS , page 40).
The calibration record is automatically transmitted to the interface
after calibrating.