digital multi meter

Discussion in 'General Electronics Chat' started by syed abdullah, Apr 14, 2010.

  1. syed abdullah

    Thread Starter New Member

    Nov 26, 2008
    4
    0
    In the articles of digital multi meter I have seen that the authors only discuss the digital volt meter and they dont write any thing about the opperation of digital ammeter.What is the reason for that ?
    also if someone of you have a online link about the operation of digital ammeter, and digital ohmmeter please reply me
    if any one have some links about operation of digital frequency meter,digital power factor meter, digital LCR bridge and such type digital instruments plese reply me
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    If the digital meter is a "multimeter", then an ammeter function is built in.

    Using those meter types as search terms in Google brings up informative links - http://en.wikipedia.org/wiki/Ammeter
     
  3. Markd77

    Senior Member

    Sep 7, 2009
    2,803
    594
    In the average multimeter there is a low ohm resistor (often just a piece of wire) and the multimeter measures the voltage across that and converts it to a current. I think that the resistance meter sends a small fixed current through the test resistance, measures the voltage and converts it to a resistance for you.
     
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