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Discussion in 'Electronic Repair' started by T.J., Jul 30, 2007.

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  1. T.J.

    T.J. Guest

    Hi I want to buy a new Multimeter and there are a few features that
    currently I have no idea what they mean. Obviously I currently have
    idea for those features but I wondered if somebody can explain to me
    what they are/do so maybe in the future I will need them.
    1. Conductance
    2. Motor Drive Measurement
    3. Smoothing
    4. Duty Cycle
  2. Charles

    Charles Guest

    Look at these:
  3. Rich Webb

    Rich Webb Guest

    Sadly (and surprisingly) none of the four were on the Common DMM
    Terminology link from that page.

    Conductance is the multiplicative inverse of resistance, G = 1/R, in
    units of siemens (sadly, no longer mhos). Not terribly useful most of
    the time but easy to derive for a digital meter and makes another
    "range" that Marketing can flog. G not C since C was already taken.

    Motor drive may go along with smoothing. It's a feature mostly useful
    for voltage/frequency measurements of large electric motors (duh ;-)
    because they tend to be electrically very noisy critters and "normal"
    meters may give false readings.

    Duty cycle is the fraction of the period of a when a signal is
    (selectable) high or low, usually expressed as a percentage. A
    symmetrical square wave has a 50% duty cycle. Useful in checking an
    PWM circuit, for example.
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