wtw 330i - Page 30

Operation pH 330i/340i
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.
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.
AutoCal DIN
AutoCal TEC
6
mV/pH
mol/L
8
Auto
Store
RCL
LoBat
CalError
ARng
AR
Time
Baud
Day.Month No.
Ident
Year
1
U
%
°F
S
TempError
mg/L
% ppm
ISE
8
4
2
OS
L
°C
TP
pH
ConCal