YSI TruLab 1320P - Manual (Page 37)

TruLab pH/ISE 1320 pH value
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6.2.5 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:
26. Set the nominal buffer value for the measured temperature with
<><>.
27. Accept the set calibration value with .
The calibration display for the next buffer appears (voltage display).
28. Use to finish calibration 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.
Values to be
determined 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
9.1.1 S
ETTINGS FOR P
H
MEASUREMENTS
, page 66).
pH
9.958
24.8 °C
ConCal
3
12.12.2012
12:12
Buffer

