Digital Multimeter

Digital Multimeter is an electronic test equipment which measures the AC/DC voltage and provides the reading in digital numeric mode. It has successfully replaced its age old counterpart , Analog multi-meter, which provides the reading with a pointing needle on a fixed scale. This test equipment may be used to measure the continuity of wire/circuit too.

The biggest advantage of a Digital Multi-meter is its numeric reading as it decreases the chances of reading-errors on the scale (parallaxing) from a human-eye. In addition to that , it also boosts the reading-speed and its digital reading/value can be recorded as well as used as a feed for other devices.

Digital-multimeter

The digital multimeter is commonly available in various voltage levels (AC & DC both), current levels and resistance levels depending on your requirement and costing from mere bucks to thousands of it.

Logical block diagram of a Digital multimeter

How to use a Digital Multi-meter for:

    • Measuring Voltage.

      1. Choose the suitable task by the selector knob as AC/DC and voltage (V) Section.
      2. Then select the necessary range by the selector knob. Always select the range more than the voltage to be measured.
      3. Connect the probe with the multi-meter and place it to the i/p marked with polarity (i.e the plus and minus sign).
      4. Use High Voltage probe, if you have to measure voltage beyond 1KV.
    • Measuring Current.

      1. Choose the suitable task by the selector knob as AC/DC and current (A) Section.
      2. Then select the necessary range by the selector knob. Always select the range more than the current to be measured.
      3. If you are measuring a current below 02 Amps, Connect the probe with the multi-meter and place it to the i/p marked with polarity plus and minus sign. For measuring a current from 2-10 Amps, the probe’s high i/p is to be connected to the 10A probe point.
    • Resistance Measurement

      1. Choose the suitable task by the selector knob as “OHM” Section.
      2. Then select the necessary range by the selector knob. Always select the range near to the resistance value.
      3. Connect the probe with the multi-meter and place it to the i/p marked with polarity (i.e the plus and minus sign).
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