Xylem Cond 1970i - Manual (Page 23)

Cond 1970i Operation
23 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 key until CELL appears on the display.
2 Press the key.
3 Press the 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 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