TESTO 240 - Conductivity M M Easurement; HOLD Function

10
Conductivity mmeasurement
Connect the measuring cell to the instrument.
Position the measuring cell in the measuring soluti-
on.
Make sure that the solution is up to the air vents ,
and that all the air escapes from the measuring cell
(move the measuring cell gently when
dipping into the solution).
Switch on the instrument.
Once the segment test and short adaption phase
have been completed, the conductivity value,
based on 25 °C, and temperature are displayed.
The salt content of the solution (NaCl mg/l) can be
calculated by pressing the
PAGE
key.
(The calculation is as follows:
only H
2
O + dissolved NaCl contribute to
conductivity).
The HOLD function enables measured values to be
held in display over a longer period of time. The
AUTO OFF function is then deactivated.
Press the HOLD key.
The measured value and the HOLD function are
held in display.
The AAUTO OFF function iis tthus ddeactivated
The current values are displayed by repressing the
HOLD key.
t
e
s
to
te
rm
mS/cm  mS/cm
¡C / ¡F
te
s
to
®
2
40
S
E
L
E
C
T
H
O
L
D
I
0
B
a
t
H
o
ld
¡
k
¡
W
Auto
mmS/cm
p
m
V
2
pH
Man
/
x
N
a
C
l
X
%/
D
I
N
/
N
B
S
m
g
/l
C
a
l
I
0
m S/cm
W
Auto
pH
Man
x
NaCl mg/l
Cal
m S/cm
HOLD
HOLD ffunction
m S/cm