TESTO 240 - Page 29

Instructions oof uuse
Switching oon tthe iinstrument
Switch on the instrument.
A short display and segment test then follows, after
which a battery control test indicates the battery
voltage (see also battery replacement).
The instrument is now operational.
The circle disappears from the display at a rate of
2.5 minutes/segment.
When the last segment disappears, the instrument
switches itself off.
testo
term
mS
/cm
 m
S
/cm
¡C
/ ¡F
testo
®
240
S
E
L
E
C
T
HOLD
I
0
Bat
Hold
¡
k
¡
W
Auto
mmS/cm
p
m
V
2
pH
Man
/
x
NaCl
X
%/
DIN/NBS
mg/l
Cal
If the instrument is not operated for 10 minutes,
the instrument switches off automatically.
Auto ooff ffunction
I
0
Bat
Hold
¡
k
¡
W
Auto
mmS/cm
p
mV
2
pH
Man
/
x
NaCl
X
%/
DIN/NBS
mg/l
Cal
Bat
W
n
mS/cm
Auto ooff ffunction
ATTENTION!
The cell constant must be stored in the instrument
before the first measurement.
7
Bat
Hold
¡
k
¡
W
Auto
p
mV
2
pH
Ma
n
/
x
NaCl
X
%/
DIN/NBS
mg/l
Cal
mS/cm
m