Al l c c – Xylem handylab pH LF 12 User Manual
Page 40
Operation
handylab pH/LF 12
40
ba75370e03
11/2009
Calibration
evaluation
After the calibration, the measuring instrument automatically evaluates the
current status of the calibration. The evaluation appears on the display.
Determining the
cell constant
You can determine the cell constant as follows:
Display
Cell constant [cm
-1
]
0.450 ... 0.500 cm
-1
E3
Eliminate the error according to
chapter 6 W
Outside the range
0.450 ... 0.500 cm
-1
1
Press the <CAL> key repeatedly until the
ӕ
and CELL status
displays appear.
2
Press the <RUN/ENTER> key. The CAL display appears, as
well as
– the current, calibrated cell constant (with sensor symbol on
the display) or
– the fixed cell constant 0.475 1/cm (without sensor symbol
on the display). In this case, the measurement parameters
are initialized. See “Reset” on page 62.
3
Immerse the conductivity measuring cell in the control standard
solution, 0.01 mol/l KCI.
4
Press the <RUN/ENTER>
key.
The AutoRead measurement to determine the cell constant
starts. The AR display indicator flashes until a stable signal is
reached. The cell constant determined is displayed. The mea-
suring instrument automatically stores the cell constant.
AR
AR
RCL
RCL
O
O
UpH
UpH
Sal
Sal
Store
Store
Auto
Auto
AutoCal DIN
AutoCal DIN
AutoCal TEC
AutoCal TEC
LoBat
LoBat
ARng
ARng
Tref20
Tref20
Lin
Lin
nLF
nLF
Sal
Sal
%
%
mg/l
mg/l
mV/pH
mV/pH
cm
cm
°
°
°
°
TP
TP
m
m
S/
S/
cm
cm
F
F
C
C
%
%
/
/
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
5
2
0
0
7
7
4
4
A
A
L
L
C
C
cm
cm
1/
1/
Tref25
Tref25
Cal
Cal