Query regards Multimeters

Discussion in 'General Electronics Chat' started by uzielkr, Oct 7, 2016.

  1. uzielkr

    Thread Starter New Member

    Oct 7, 2016
    Hello friends, Im new into all this. I just want to know if all multimeters generally are powered thru 9V battery. Are there some models that are powered thru AA/AAA battery or power adapter? Also mine currently is using 9V battery, can i use a converter cable in the 9V input port so output port can look like a dc in jack and then i can connect a 9V ac power adapter?
  2. AlbertHall

    Distinguished Member

    Jun 4, 2014
    Most use the 9V block, though I have one which uses two AAA. Multimeter batteries last forever (well, almost!). Why do you want to do this? There is a possible problem. When a multimeter is used to measure high voltages all its internal circuitry is at that high voltage, and so will be the external 'battery pack' and its connections.
    uzielkr likes this.
  3. KeepItSimpleStupid

    Well-Known Member

    Mar 4, 2014
    There are these things: https://www.amazon.com/HQRP-Connector-Multimeter-Microphone-BirdHouse/dp/B00C9VGZJI

    My very old one had three 9V batteries and one D cell. There was another analog one that used an AA for the ohms function.
    I have a meter that uses a large 9.4 V NiCad pack.

    So no, but likely.

    You will loose the safety aspects of the meter when the meter is modified and you might have a ground in an unintentional place. You will loose its isolation ratings etc.

    Depending on your application and the cost of the meter, you may be able to get away with it.
    uzielkr likes this.
  4. ci139


    Jul 11, 2016
    i guess if go your local university physics department you see most if not all meters plugged to mains
    it's not because they tightly monitor it . . . (me . . . shot up . . . now! . . . go to sleep . . . do it!)
    uzielkr likes this.
  5. uzielkr

    Thread Starter New Member

    Oct 7, 2016
    What about 'pen style' multimeters, I think they all run with AAA batteries but they are not as versatile as main ones!!
  6. wayneh


    Sep 9, 2010
    For what it's worth, the cheap (free) Centech meter you can get at Harbor Freight uses a 9V battery. They last so long, I don't think I've replaced more than one in the last 5 years. I wouldn't bother to use an AC adapter.
    uzielkr likes this.