Al l c c – Xylem MULTI 3400 MULTI-PARAMETER METERS User 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
Outside the range
0.450 ... 0.500 cm
-1
1
Press the <CAL> key repeatedly until the status display
CAL CELL appears.
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 section 4.9 R
).
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 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