4
5.2 Measurements with the zero position of
the needle centred
This mode of measurement only works for the
DC current and DC voltage ranges.
•
For measurements requiring the zero posi-
tion of the needle position to be centred, set
the operating mode switch to the position
.
•
Before connecting the external quantity to be
measured, use the adjustment knob to accu-
rately centre the zero position on the scale.
5.3 Selecting measuring range
•
Initially set the range selection switch to the
largest possible range, then work down to
lower ranges until the optimum deflection of
the needle is reached.
•
Once all measurements have been com-
pleted, turn the selector switch back to the
maximum range again.
5.4 Calibrating zero-point
•
Turn on the multimeter, set the maximum
voltage range of 30 V and connect the
ground socket to the voltage socket using a
short lead.
•
Set up the multimeter in a horizontal position
and correct the zero-point of the dial with the
help of the adjustment knob.
5.5 Switching off
•
Always set the measuring mode to
after
completion of measurements to avoid un-
necessary use of the battery.
6. Maintenance
6.1 Changing the battery
All measuring leads must be discon-
nected from the multimeter before the
casing is opened.
•
From time to time, check the state of the
battery (see 5. Operation).
Remove discharged or corroded batter-
ies from the multimeter.
During prolonged periods of disuse,
also remove the battery from the mul-
timeter.
•
Unscrew the back of the casing.
•
Replace flat batteries with 1.5-V alkaline
batteries of size AA IEC LR6.
•
Place the negative pole of the battery on the
spring.
The polarity is also marked on the board with
plus and minus symbols. Additionally, a me-
chanical clip on the positive side prevents bat-
tery contact when polarity is reversed.
•
Close casing again.
Fig. 1 Changing the battery
•
Do not dispose of the
battery
in
regular
household refuse. Fol-
low the local regula-
tions (In Germany:
BattG;
EU:
2006/66/EG).
6.2 Cleaning
•
For cleaning, use a soft cloth, slightly mois-
tened with alcohol, or a brush.
•
In order to remove a potential electrostatic
charge from the meter display window,
which can easily influence measurements,
follow the instructions above.
Dirt or moisture in the measurement sockets can
affect readings.
•
Shake out any dirt that may be in the meas-
urement sockets.
•
Soak a new swab with isopropyl alcohol and
work around the inside of each measure-
ment socket.
