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Basic multimeter question

Discussion in 'Electronic Basics' started by Guido, Sep 10, 2004.

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  1. Guido

    Guido Guest

    Hi,

    I'm new here and just now I got myself confused.... and am ashamed off
    it!! ;-)

    When I measure the resistance of a resistor, and have my multimeter in
    200k position, and the resistance measures 67 ....

    Is the resistance 670.000 or 6.700.000

    ???

    Tnx. :)
     
  2. Neither. Assuming you mean it reads '67.0', then the resistance is
    67k, i.e 67,000 - or, in your notation, 67.000
     
  3. Guido

    Guido Guest

    so to make it more clear to me:

    when 67 is displayed in the 200k setting would mean 670k since we're
    working with hundreds in this setting versus 67 in the 20k setting
    being displayed as 67k since we're working with tens in this setting?

    If that is so... why did they use 20, 200, 200, 20k, 200k, 2000k
    versus 10, 100, 1000, etc. Confusing (needs getting used to) Industry
    standard or free choice from manufacturer?
     
  4. Guido

    Guido Guest

    ah, ok, that answers my previous question if it is an industry
    standard. the 200k part reverse to the maximum reading in that
    setting.

    Tnx
     
  5. andy

    andy Guest

    The 200k position means it reads 200k at full scale. full scale is when
    it's showing 199.0, so 67 means 67k. On the 2k scale, it would read 1.99
    at full scale, and 0.67 would mean .67k=670 ohms, etc.
     
  6. andy

    andy Guest

    probably because if it was 10..., you'd have a 0-10v voltage range, which
    wouldn't cover a lot of common circuits. So people would have to switch to
    0-100v, which would be too high so you lose accuracy. Plus it's easy to
    add a single extra '1' at the left hand side of the display, and leave
    room for the - sign. Most likely a load of ad hoc influences like this
    rather than any thing definite.
     
  7. Rich Grise

    Rich Grise Guest

    Well, if 200 on your display means 200K, then 67 on the display means
    67K.
    It's probably really 19.999, 199.99, 1999.99, and so on, which they
    round up for marketing purposes.

    Have Fun!
    Rich
     
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