wtw pH 1970i, Operating Manual

Page: 28 / 71

Operation pH 1970i
28 ba75690e01 01/2007
6 To continue the two-point calibration , thoroughly rinse the
electrode with deionized water.
7 If necessary, enter the temperature of the second buffer solu-
tion with
<
▲
> <
▼
> .
8 Immerse the pH electrode into the second buffer solution.
9 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:
10 When the measured value is stable, AR disappears. The in-
strument displays the value of the slope (mV/pH) and the eval-
uation of the calibration in calibration range I.
REL1
TEC
Store
AR
1
LoBat nLF Lin Oxi
Tref25 Tref20
ARng
8
Time
Year Ident
No. Day.Month
Baud
Sal
cm
1/
K /
%
RCL
REL2
pH / mV
m
cm
S/
% mg/ l
Sal
O
S
pH
C
2 4 8
d 2
°
C
TP
Cal
Auto
1
S
TEC TEC
REL1 REL1
mV S /
1
Sal
O
LoBat nLF Lin Oxi
Tref25 Tref20
ARng
8
Time
Year Ident
No. Day.Month
Baud
Sal cm 1/
K
/
%
RCL
REL2
pH
m
cm
S/
% mg/ l
2 4 8
°
C
TP
AR Cal
Auto
/
Sal
O
LoBat nLF Lin Oxi
Tref25 Tref20
8
Time
Year Ident
No. Day.Month
Baud
Sal cm 1/
K
/
%
RCL
REL2
pH
m
cm
S/
% mg/ l
2 4 8
°
C
TP
mV
AR Cal
Auto
ARng
pH
9 1 4
pH
1 2 9
TEC
REL1
TP
Sal cm 1/
K / %
2 4 8
°
C
Year Ident
1
S
Store
AR LoBat nLF Lin Oxi
Tref25 Tref20
ARng
8
Time
No. Day.Month
Baud
RCL
REL2
m
cm
S/
% mg/ l
Sal
O
pH
5 9 4
Cal
Auto
pH / mV