Xylem MULTI 3400 MULTI-PARAMETER METERS - Manual (Page 39)

Multi 3400i Operation
39
Calibration evaluation After the calibration, the measuring instrument automatically evaluates
the current status of the calibration. The evaluation appears on the dis-
play.
Determining the
cell constant
You can determine the cell constant (conductivity measuring cell Tetra-
Con 325) 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 status display
CAL CELL appears.
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 section 4.9 R
ESET ).
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 constants.
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