1 determining the cell constant (calibrating), Determining the cell constant (calibrating), C t 1 1 – Xylem Cond 1970i User Manual
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Cond 1970i
Operation
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ba75692e01
01/2007
4.3.1
Determining the cell constant (calibrating)
Note
This method of automatically determining the cell constant by calibra-
tion with the 0.01 mol/l KCL standard solution can only be used for
measuring cells with cell constants in the range 0.450 ... 0.500 cm
-1
or
0.800 ... 1.200 cm
-1
.
This is how you can determine the cell constant:
1
Press the <CAL> key until CELL appears on the display.
2
Press the <RUN/ENTER> key.
3
Press the <CAL> repeatedly, until the calibrated cell constant
appears on the display: CAL appears on the display.
4
The displayed value is the current calibrated cell constant. You
can:
– accept this setting for measuring with <M> or
– continue with step 5 and start a new calibration.
5
Immerse the measuring cell in the control standard solution,
0.01 mol/KCl.
REL1
Sal
cm
1/
K
/
%
REL2
°
C
TP
Store
AR
LoBat
nLF
Lin
Oxi
Tref25
Tref20
ARng
Cal
TEC
Auto
Year
Ident
/
mV
m
%
C T 1
1
S
pH
Time
No.
Day.Month
Baud
RCL
pH
cm
S/
mg/ l
Sal
O
E L L
C
RCL
REL1
Sal
mg/ l
ARng
O
TP
Oxi
AR
°
C
S
Year
Ident
No.
Day.Month
Tref20
LoBat
Lin
nLF
Sal
pH
C
TEC
Auto
Store
Time
Baud
K
/
%
REL2
pH
/
mV
m
cm
S/
%
4 7 5
A
0
Cal
Tref25
cm
1/
L
C