pH/Oxi 340i
Operation
27
4.3.2
AutoCal DIN
For this procedure, use two different standard buffer solutions accord-
ing to DIN 19266 (type A, C, D or F with pH values at 25 °C of: 1.679 /
4.006 / 6.865 / 9.180).
Note
Skip the steps 2 and 7 if you use a pH electrode with a temperature
sensor or the temperature sensor of a D. O.probe.
1
Press the <CAL> key repeatedly until the display Cd1 and the
function display AutoCal DIN appear. The sensor symbol dis-
plays the evaluation of the last calibration (or no sensor symbol
in the delivery state or after the measurement parameter has
been reset).
2
If required, enter the temperature of the first buffer solution with
<
▲
> <
▼
> while keeping the <RUN/ENTER> key depressed.
3
Immerse the pH electrode in the first buffer solution.
4
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:
AutoCal TEC
/pH
mV
TDS
O
U
Tref20
Cal
8
S
1
Sal
%
mg/l
1/cmSal
Lin
Tref25
nLF
RCL
Auto Store
LoBat
ARng
AR
Time
Baud
Day.Month No.
Ident
Year
mbar
cm
M
°
F
/
K
%
S/
m
cm
8
4
2
d 1
°
C
TP
pH
C
AutoCal DIN
AutoCal TEC
AutoCal TEC
°
F
0
Cal
Tref20
Lin
0
Cal
Tref25
ARng
Tref25
Auto
ARng
Tref20
Lin
F
cm
1/
1/cm
AR
AR
RCL
RCL
O
O
UpH
UpH
Sal
Sal
Store
Store
Auto
LoBat
LoBat
nLF
nLF
Sal
Sal
%
%
mg/l
mg/l
mV/pH
mV/pH
cm
cm
°
m
m
S/
S/
cm
cm
%
%
/
/
K
K
M
M
TDS
TDS
1
1
S
S
mbar
mbar
Time
Baud
Day.Month No.
Ident
Year
Time
Baud
Day.Month No.
Ident
Year
0 1
7
4
pH
pH
C
°
C
°
AR
AR
mV
8
8
4
4
2
2
TP
TP
7
1
AutoCal DIN
AutoCal DIN
