wtw inoLab pH 720, Operating Manual, Page: 25 / 48

pH 720 Operation
25
Note
If the slope ( SLO ) is indicated on the display, you can
change the unit of the slope with
28
.
The display in % refers to the Nernst slope, 59.2 mV/pH
(100 x the slope determined/Nernst slope).
5 Thoroughly rinse the electrode with distilled water.
6 If necessary, set the temperature of the second buffer
solution by pressing
28
.
7 Submerse the electrode in the second buffer solution.
8 Press the
g
key.
AR flashes on the display.
The electrode voltage (mV) appears on the display.
As soon as a stable value is recognized, AR disap-
pears.
The sensor symbol shows the electrode evaluation
after the two-point calibration.
The value of the slope (mV/pH) appears on the dis-
play.
9 Press the
g
key.
The value of the asymmetry (mV) appears on the dis-
play.
10 To return to the measuring mode: Press the
m
key
or continue with the three-point calibration.