36
SECTION 3,
continued
17. To save the calibration and return to the reading mode, press
ENTER
. To exit the calibration without saving it and return to
the reading mode, press
EXIT
.
18. After the calibration is stored, the meter is immediately ready
to begin measuring samples. See Section 3.6 on page 38.
3.4
Reviewing Calibrations
pH calibrations result in a linear calibration curve, so only one
slope value and its correlation coefficient (r
2
) are displayed in Cal
Review mode. ISE calibration result in a linear, piecewise
calibration for each pair of standards (see Figure 4). Therefore,
the meter will display a slope for each “calibration” between each
pair of standards. The first slope displayed is for Standards 1 and
2. The second slope displayed is for standards 2 and 3, and so
forth. Use the arrow keys to scroll to these values.
The mV values for the standards can be viewed by pressing the
ISE/mV
or
pH/mV
key. This toggles between concentration and
mV values.
Figure 4
pH and ISE Calibration Curves
pH
