ALTANA LC 3 - Manual (Page 7)

BYK LC 3 Determining/Setting the cell constants
7
Determining/Setting the cell constants
Procedure The cell constants are determined in the control standard, 0.01 mol/l KCl.
You can determine the cell constants of the conductivity measuring cells in
the range of 0.450 ... 0.500 cm
-1
or 0.800 ... 1.200 cm
-1
.
You can also set the cell constants manually in the ranges
! 0.090 ... 0.110 cm -1
! 0.250 ... 2.500 cm -1
or select the fixed cell constants 0.010 cm
-1
.
Calibration
evaluation
After the calibration, the measuring instrument automatically evaluates the
current status of the calibration. The evaluation appears on the display.
Procedure for determining the cell constants:
Display Cell constant [cm
-1
]
0.450 ... 0.500 cm
-1
0.800 ... 1.200 cm
-1
E3
Invalid calibration
Outside the range
0.450 ... 0.500 cm
-1
or
0.800 ... 1.200 cm
-1
! Connect a conductivity measuring cell to the measuring instrument.
! Press the <CAL> key repeatedly until the CELL display appears.
! Then press the <RUN/ENTER> key.
! Press the <CAL> key repeatedly until the CAL appears. Depending
on the calibration status, the instrument displays:
– 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.
Note
At this point, the procedure can be terminated with <M>.
! Immerse the conductivity measuring cell in the control standard solution,
0.01 mol/l KCI.
L C L E
2 0 7 4
Cal
cm 1/
Tref25
A L C