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Carrying Out Measurements; Voltage Measurement; Replacing The Battery - VOLTCRAFT AT-200 Bedienungsanleitung

Digital multimeter
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roded Moreover the vapours are detrimental to health and explosive. Nor should
sharp-edged tools such as screwdrivers, metal brushes etc. be used for cleaning
purposes.
Periodically check the technical safety of the instrument and measuring lines, e.g.
check for damage to the housing or squeezing etc.
Always observe the following safety instructions before cleaning the device:
Live components may be exposed if covers are opened or parts are
removed (unless this can be done without tools).
All connected lines must be disconnected from the instrument
before servicing or repair works are performed.
Repair work must always be carried out by qualified experts famili-
ar with the hazards involved and with the relevant regulations.
If the multimeter fails to function with the proper supply voltage (9V compound bat-
tery) and fuses or it cannot be repaired, it must be disposed of in accordance with
the applicable legal provisions.

Replacing the battery

A 9V compound battery is required to operate the measuring instrument. If the battery
replacement symbol (BAT) appears on the display, the battery is to be replaced.
Proceed as follows to replace the battery:
- Disconnect your measuring instrument from the measurement circuit.
- Disconnect all the measuring lines from the measuring instrument.
- Turn it off.
- Loose the rear screws of the battery compartment cover and
- remove the cover by drawing it slightly.
- Insert a new battery with the correct polarity.
- Close the battery compartment carefully again.
CAUTION! Never operate the measuring instrument when it is
open. !Danger to life!
Do not leave flat batteries in the device. Even batteries protected against leaking can
corrode and thus release chemicals which may be detrimental to your health or dest-
roy the battery compartment.
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Carrying out Measurements

In no event exceed the max. permitted input values within the over-
voltage category III. The frequency of the alternating volumes may
not exceed 400Hz! Do not contact circuits or parts of circuits if there
could be higher voltages than 25V ACrms or 35V DC pending within
them ! Danger! Before measuring, check the connected measuring
lines for damage such as, for example, cuts, cracks or squeezing.
Replace defective measuring lines immediately by new ones, defec-
tive measuring lines may not be used any longer! Danger!
a) Voltage measurement
Proceed as follows to measure AC/DC voltages:
- Connect the black measuring line with the COM socket
(7) and the red measuring line with the VΩ-socket (6) till
they are plane at the measuring instrument .
- Set the range selection switch (5) to position "V".
- Press the "MODE" button (9) additionally for measuring
AC voltages.
- Now connect the two measuring prods to the object to
be measured (battery, switching etc.).
- In the display (1), the polarity of the measuring value
concerned will be indicated together with the current
measuring value.
The voltage range "V" shows an input resistance of approx. 10MOhm. As soon as a
minus "-" appears for the direct voltage in front of the measuring value, the measu-
red voltage is negative (or the measuring prods have been mixed up).
Note: Due to the fact that the measuring input is very sensitive, it is possible that any
measuring values ("phantom measuring values") will be indicated if the measuring
wires are free (not connected to an object to be measured). This "phenomenon" is
normal and disappears as soon as you perform your measurement.
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