Measuring Mode; Null Balancing; Measuring Ac And Dc Voltage - VOLTCRAFT VC-2020 Bedienungsanleitung

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Measuring
Do not exceed the maximum permitted input values. Do not contact circuits or parts
of circuits if there could be voltages higher than 25 V ACrms or 35 V DC present wit-
hin them. Mortal danger! Before measuring, check the connected measuring lines for
damage such as, for example, cuts, cracks or squeezing. Replace defective measu-
ring lines immediately by new ones, defective measuring lines may not be used any
longer! Mortal danger
Before changing the measuring area, the test prods have to be removed from the
measured object.
Always start each measuring operation with the largest measuring range. Then gradually
change to a smaller one to achieve an exact measuring result.
The measuring results at the rotary switch correspond to the scale end value. For reading, always select
the corresponding value (e.g. scale 50 for the measuring ranges 50 and 500)
a) Null balancing
Prior to each measuring, perform a null balance via the calibration screw (2) (e.g. 0V).
Switch on the multimeter via the rotary switch (4) and select the measuring function "Ω. Short-circuit the
measuring tips and then perform the zero balancing using the 0 Ω adjustment control.
b) Measuring AC and DC voltage
In no event exceed the max. permitted input values, neither do it when measuring
superposed direct voltages (e.g. ripple voltages).
Proceed as follows to measure DC voltages:
- Select the measuring range "V"
- Connect the black measuring line with the COM socket (8) and
the red measuring line with the V/Ω socket (9).
- Now perform null balancing.
- Observe the correct polarity (red = + / black = -) and connect the
two measuring tips with the measuring object (battery, circuit,
etc.).
- In case of wrong polarity, the pointer deflects to the left. Interrupt
measuring immediately and reverse the polarity of the measuring
tips.
- Read the measuring value off the scale "DCV".
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on the rotary switch.
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5A