Setting tthe ttemperature ccoefficient
testo 2240
is suitable for measurements in
solutions of 0.0 µS/cm to 2000 mS/cm.This
measuring range contains a variety of different
solutions, each with special temperature
coefficients.
The temperature coefficient (
0 %/°C to 5.00%/°C
and
"nW"
for natural water) describes the influence
of temperature on the conductivity of the
solution.
In order to obtain accurate results, the coefficients
of the solution should be entered before beginning
a measurement.
2.1 %/°C is the standard Ø value for solutions with
unknown temperature coefficients, "
nW"
is the set-
ting for measurements in natural water (press ▲
once after 5.00 %/°C). (see appendix: " Tempera-
ture coefficients of selected....")
Connect the measuring cell.
Switch on the instrument.
Once the display and segment test has been com-
pleted, select the
"tc"
menu (temperature coeffi-
cient) with the page key.
Set the temperature coefficient with the arrow
keys.
Wait 5 seconds for the instrument to store the
value and enter the measurement menu.
This value remains stored even after the instrument
has been switched off and is available for the next
measurement.
te
s
to
t
e
r
m
mS/cm mS/cm
¡C / ¡F
te
s
to
®
2
4
0
S
E
L
E
C
T
H
O
L
D
I
0
B
a
t
H
o
ld
¡
k
¡
W
Auto
mm
S/cm
p
m
V
2
pH
Man
/
x
N
a
C
l
X
%/
D
I
N
/
N
B
S
m
g
/l
C
al
I
0
m S/cm
NaCl mg/l
%/
SELECT
HOLD
W
n
mS/cm
W
n
%/
9
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