Manual

handylab LF 11 Operation
21
ba75365e04 01/2011
4.3.1 Determining the cell constant (calibrating in the
control standard)
Note
This method of automatically determining the cell constant by calibration 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> key repeatedly, until the calibrated cell con-
stant 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.
OUpH
L
F
Sal
Store
RCL
AR
Auto
AutoCal DIN
AutoCal TEC
LoBat
Cal
ARng
Tref25
Tref20
Lin
nLF
Sal
%
mg/l
mV/pH
cm
°
°
TP
m
S/
cm
cm
1/
F
C
%
/
K
M
TDS
8
1
S
mbar
Time
Baud
Day.Month No.
Ident
Year
L
CL
E
A
L
C
S
1
LoBat
Lin
nLF
Tref20
RCL
ARng
AR
°
°
TP
F
C
%
/
K
M
%
mg/l
mV/pH
m
S/
cm
Sal
TDS
Auto
Store
Sal
mbar
OUpH
cm
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
5
0 7
4
Cal
cm
1/
Tref25