Xylem handylab pH LF 12 - 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
HAT TO DO IF ...
Outside the range
0.450 ... 0.500 cm
-1
1 Press the key repeatedly until the
ӕ
and CELL status
displays appear.
2 Press the 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 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