wtw pH 315i Operating Manual page 22

Operation
Three-point calibration
22
11 Press the <RUN/ENTER> key. Ct3 appears on the display.
ISE U pH
S
8 C t
1
Time Baud
8 2 4
Day.Month No.
Year Ident
AutoCal DIN Auto Store
LoBat
AutoCal TEC ConCal
12 Thoroughly rinse the electrode with distilled water.
13 Immerse the pH electrode in the third buffer solution.
14 Press the <RUN/ENTER> key.
The AR display indicator flashes.
The electrode voltage (mV) or the buffer nominal value ap-
pears on the display. Example:
ISE U pH
S
1 1 7 1 7
Time Baud
8 2 4
Day.Month No.
Year Ident
AutoCal DIN Auto Store
LoBat
AutoCal TEC ConCal
15 When the measured value is stable, AR disappears. The value
of the slope (mV/pH) appears on the display. The probe symbol
shows the evaluation of the current calibration (three-point cal-
ibration).
mol/L
3
mV/pH
% ppm
mg/L
°F
8
%
TP
°C
CalError TempError
ARng AR RCL
mol/L
S
1 0
mV/pH mV
% ppm
mg/L
°F
Time
8
%
Day.Month
TP
°C
Year
CalError TempError
AutoCal DIN
LoBat
ARng AR RCL
AutoCal TEC
ISE U pH
mol/L
0 1 1
mV mV/pH
% ppm
°F
Baud
8 2 4 8
No.
°C
Ident
CalError
Auto Store
ARng
ConCal
pH 315i
mg/L
%
TP
TempError
AR RCL