wtw 330i Operating Manual page 30

Operation
30
Note
At this point, the ConCal calibration can be broken off with <M>. This
corresponds to a single-point calibration. For this, the instrument
uses the Nernst slope (-59.2 mV/pH at 25 °C) and the specified asym-
metry of the electrode.
ISE U pH
S
6 S L
1
Time Baud
8 2 4
Day.Month No.
Year Ident
AutoCal DIN Auto Store
LoBat
AutoCal TEC ConCal
8 To continue the two-point calibration, thoroughly rinse the
electrode with deionized water.
9 If necessary, enter the temperature of the second buffer solu-
tion with < > < >.
10 Immerse the pH electrode in the second buffer solution.
11 Press the <RUN/ENTER> key. The second pH value appears
on the display.
12 Set the measured value to the nominal pH value of the buffer
solution (at the current temperature) with < > < >.
13 When the measured value is stable, press the <RUN/ENTER>
key. The value of the slope (mV/pH) appears on the display.
The probe symbol shows the evaluation of the current calibra-
tion.
mol/L
O
mV/pH
% ppm
mg/L
°F
8
%
TP
°C
CalError TempError
ARng AR RCL
pH 330i/340i