wtw inoLab Cond 720, Руководство по эксплуатации

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Operation
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4.3 Determining/setting up the cell constant [C]
Why determine/set
up the cell con-
stant?
Due to ageing, the cell constant slightly changes. As a re-
sult, an inexact measured value is displayed. Calibration de-
termines the current value of the cell constant and stores
this value in the instrument.
Thus, you should calibrate at regular intervals.
You can determine the cell constant of the conductivity mea-
suring cell in the range 0.450 ... 0.500 cm
-1
or 0.800 ... 1.200
cm
-1
by calibrating in the control standard or set it up manu-
ally in the range 0.250... 2.500 cm
-1
. Additionally, you can
select the fixed cell constants 0.1 cm
-1
or 0.01 cm
-1
.
4.3.1 Determining the cell constant (calibrating)
Determining the cell
constant
(calibration in con-
trol standard)
Determine the cell constant as follows:
1 Press the
c
key repeatedly until LF CELL appears
on the display.
2 Press the
g
key.
3 Press the
c
key repeatedly until the following is dis-
played.