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Maintenance, Battery Change, Fuse
Change, Installing the Measuring Device
General
In order to ensure the accuracy of the multimeter over a longer period of time, you
should calibrate it once a year.
The battery and fuse change is described in the following. For cleaning the device
respectively the display and the measuring cables, use a clean, lint-free, anti-static
and dry cleaning cloth.
Notice!
Do not use any carboxylic cleaning agents or petrol, alcohol or similar. These affect
the surface of the measuring device. Besides, the vapours are hazardous to your
health and explosive. Do not use any sharp-edged tools, screwdrivers, metal brush-
es or similar for cleaning.
Check the technical safety of the device and the measuring lines at regular intervals,
e.g. for damages on the casing, crushing, etc.
Make sure you observe the following safety notices prior to cleaning the device:
When opening the covers or removing parts except where possible by
hand, you may expose live parts.
You have to disconnect all connected cables from the device prior to performing
maintenance work.
Repairs may only be conducted by experts who are familiar with the associated risks
respectively the pertinent regulations.
Changing the Battery
A 9 V block battery is required for operating the device.
A battery change is required when the battery change symbol appears on the display.
For changing the battery, proceed as follows:
- Separate your measuring device from the measuring circuit.
- Remove all measuring cables from the measuring device
- and turn it off.
- Loosen the screw on the back of the battery compartment cover and
- lever off the cover by pulling slightly. The spent battery is located in the cover and
secured with a clip. Carefully lever off the clip and remove the spent battery.
- Insert an new battery in the marked cover (+ and -) with the right polarity. Clamp
down the clip until it snaps into place in the cover of the battery compartment.
35
Notices!
When performing resistance measurements, make sure that the measuring points
which you touch with the measuring tips for measuring, are free from dirt, oil, weld-
ing lacquer or similar. Such deposits may falsify the measuring result.
As soon as "OL" (for overflow) appears on the display, you have exceeded the
measuring range or the measuring circuit is interrupted.
d) Acoustic Continuity Test
Select the measuring range
Ω
.
- Press the button "SELECT" in order to switch to the acoustic continuity test range.
appears on the display. The measuring value is visible on the display (1). The
continuity value is < 50 Ohm and an acoustic beep sounds.
e) Diode Test
Proceed as following for this measurement:
- Connect the black measuring cable with the COM
socket (7) and the red measuring cable with the V
Ω
socket (6) until these are plane in the measuring
device.
- Set the range selection switch (5) to position
Ω
.
- Press the button "SELECT" twice in order to switch
to the diode test range.
appears on the display.
- Check the measuring cables for throughput by connecting both measuring tips.
This must result in a value of approx. 0. .
- Now connect the two measuring tips with the measuring object (diode). If you
check a diode in throughput direction (red measuring cable on the anode = diode
side without ring marking), you will measure a voltage as of approx. 0.6 V (silicone
diode), inasmuch as the diode stretch is not defect. However, if you measure in
reverse direction (red measuring cable on the cathode = diode side with ring mark-
ing), "OL" appears on the display. If a "voltage value" is displayed, you have either
connected the measuring object incorrectly or it is defect.
