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HOW TO: Use a multimeter

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dieman566
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2010/03/20 06:07:38 (permalink)
How to use a multimeter
Multimeters can be a very useful tool for modding.  They can be used in a wide varity of electronics.  

Contents  

I: Testing Battery Charge
II: Continuity (Connection between two points)
III: Testing resistance (Ohms)
IIII: Measuring current
IIIII:  
 
Warnings 

Never ever connect  the meter to a mains supply.
Never change the dial when you have it connected to a circuit.
Respect your meter  
 
I: Testing Battery Charge or voltage
   
It is quite easy to test battery charge with a multimeter, all you have to do is set it to the DC voltage side (As shown below).  You need to know roughly how many volts the battery has so Eg. If it is a AAA battery they normaly have 1.5volts so we want to select the Less than 20 volts option.


Now simply touch the positive side of the battery with the prositve prong and the negative with the other prong.

 *IT SAYS 1.13V* 
 
II: Continuity (Connection between two points)
  
Circuits must be continuous or complete, they must allow current to flow. Switches, fuses and wire connectors demand good continuity. While good fuses and closed switches have good continuity, blown fuses and open switches have no continuity.


Testing Conunity is the easiest thing to do with a voltmeter its simply setting the dial to what is shown in the picture below.

Then touching 1 point and another point with the other prong it will show if they are connected together by changing the value on the screen.

From


To








post edited by dieman566 - 2011/06/06 06:35:17

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#1

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    dieman566
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    Re:HOW TO: Use a multimeter 2010/03/20 06:14:35 (permalink)
    III: Testing resistance (Ohms)
     
    When you buy a resistor they will tell you it is for example 10 kila ohms when it is never exact so with a digital multimeter you can find the exact resistances.  The same rule applys same as the voltage options you need to have a rough idea of how many Ohms your resistor resists. Below is a expample.




    This resistor is supposed to be 15 ohms but they are never exact and a multimeter will tell you the exact resistance.



     
    IIII: Measuring current
     
    Measuring current means to find out how many amps the circuit is drawing this can only be done by putting your multimeter in series with the circuit instead of parallel.

    post edited by dieman566 - 2011/06/06 06:38:11

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    #2
    dieman566
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    Re:HOW TO: Use a multimeter 2010/03/20 06:22:40 (permalink)
    Reserved for future use
    post edited by dieman566 - 2010/03/22 18:49:36

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    #3
    Melampus
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    Re:HOW TO: Use a multimeter 2010/03/22 12:36:50 (permalink)
    Man this is great guide. +1 BR to You.
    I suggest to past this thread to main up in this section.

     

    #4
    dieman566
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    Re:HOW TO: Use a multimeter 2010/03/22 18:32:56 (permalink)
    Thankyou for the blue ribbon appriciate it.
    post edited by dieman566 - 2010/03/22 18:50:25

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    #5
    qzwfcj
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    Re:HOW TO: Use a multimeter 2010/03/28 17:14:49 (permalink)
    nice info.
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    abheet
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    Re:HOW TO: Use a multimeter 2010/03/28 23:16:21 (permalink)
    Very helpful.
    #7
    mcochris
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    Re:HOW TO: Use a multimeter 2010/04/02 05:38:00 (permalink)
    Video tutorial: link

    How to buy: link

    EVGA X58 E756 (Micro), BIOS 51, i7 920 D0 batch 3945A939, 3x2G Mushkin Redline, Heatkiller 3.0 LT, Swiftech MCR320, MicroRes, MCP655, MSI 8400GS, Corsair HX850, WD 300G raptor, Win 7/64 Ultimate
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    suburbano
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    Re:HOW TO: Use a multimeter 2010/04/14 11:16:25 (permalink)
    hello, can somebody make a how to guide about testing voltages with a multimeter on an evga x58 classified 3-Way SLI, i mean everything , step by step from scratch, i got a digital multimeter from eBay but i have no idea how to use it with my board, which cable put in on the measure points, at what setting of the multimeter, etc..  here a picture of the multimeter i got







    i just want to test if all voltages are correct on the board, and matching what the bios shows up.

    *EVGA x58 Classified / 141-BL-E760-A1
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    #9
    ty_ger07
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    Re:HOW TO: Use a multimeter 2010/04/14 12:45:36 (permalink)
    suburbano

    hello, can somebody make a how to guide about testing voltages with a multimeter on an evga x58 classified 3-Way SLI, i mean everything , step by step from scratch, i got a digital multimeter from eBay but i have no idea how to use it with my board, which cable put in on the measure points, at what setting of the multimeter, etc..  here a picture of the multimeter i got







    i just want to test if all voltages are correct on the board, and matching what the bios shows up.

     
    It is very simple.
     
    Place the selector dial to the 2000m setting in the DCV range.  This means that it is measuring 2000 millivolts DC which is equal to 2 volts DC.
     
    Place the black testing lead into the hole labeled COM which stands for common.
     
    Place the red testing lead into the hole labeled V/Ohms/mA (the middle hole).
     
    Now, attach the black testing lead to a conductive part of your computer case or onto a screw which is attaching your motherboard to your case.  Then, touch the red testing lead on each motherboard voltage testing point and read the voltage displayed on your multimeter.
    #10
    dieman566
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    Re:HOW TO: Use a multimeter 2010/04/14 18:13:30 (permalink)
    Or put the black prong to GND as shown in the picture

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    #11
    ty_ger07
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    Re:HOW TO: Use a multimeter 2011/02/06 12:46:32 (permalink)
    dieman566

    Or put the black prong to GND as shown in the picture


    All of your pictures are broken. 
     
    It is hard enough to hold one testing lead on the small voltage measurement points, let alone two.  The case should be at the same potential as ground as long as your PSU is wired correctly and your case isn't made of a non-coductive material with no ground wires attached to the component grounds.
    #12
    PM_DMNKLR
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    Re:HOW TO: Use a multimeter 2011/05/29 01:38:46 (permalink)
    Pix are still broken, where'd they go?

    Just as any other form of art, modding is a passion, not just a hobby.  We fawn over it, we love it, we hold it near and dear to our hearts, we are passionate about it.  We are modders, and we are artists.
    Also, if you like any of the advice I give, please recommend I get a BR, thanks! 
    #13
    bigcape
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    Re:HOW TO: Use a multimeter 2011/06/05 22:57:59 (permalink)
    BUMMER! All the tutorial photos are gone

    If you do a little of everything.....Then...A lot of nothing gets done!
    #14
    dieman566
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    Re:HOW TO: Use a multimeter 2011/06/06 06:39:16 (permalink)
    I'm so sorry about this guys! Photo bucket must have been screwing up! However i've fixed it all

    Don't forget to protect your investment click on the picture below to register your new product and give me credit!



    #15
    PM_DMNKLR
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    Re:HOW TO: Use a multimeter 2011/06/06 11:30:49 (permalink)
    Thanks much Dieman!  Now I can finally use this one, lol.  I really appreciate it a lot :)

    Just as any other form of art, modding is a passion, not just a hobby.  We fawn over it, we love it, we hold it near and dear to our hearts, we are passionate about it.  We are modders, and we are artists.
    Also, if you like any of the advice I give, please recommend I get a BR, thanks! 
    #16
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