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multimeter Tenma 72-2605 any video tutorial-operating manual

Former Member

Hello to all,

I've just bought a Tenma multimeter  72-260572-2605 and operating manual is not clear at all Do you know some video or tutorial to help me to use it properly else I'll have to return to farnell.Thx

Parents

  • Ok but the video card is a good one and fully functionally. Also I tried with new capacitors and I cannot estimate from results if there are good.

    Can you recommend me a better multimeter?In my new repair centre I need to measure a lot of capacitances with good precision.

  • in reply to Former Member

    Generally speaking you can't measure capacitors in circuit with low cost tools - it can be done for production designs where the cost of test gear is not a problem and there is enough information to set the tools up.

    Measuring decoupling capacitors in circuit is very difficult - they are usually in parallel with many other capacitors and shunted by semiconductor parasitic effects.

    I'm not sure why you need to measure caps accurately  - for repair work I would expect a DMM to be quite good enough. Why not buy a few polyester caps in the 10nF to 1uF range and check them (5% parts should be available) but if you have some 1% resistors, a sine wave generator and an AC meter (DMM should do) you can calibrate the caps.

     

     

     

    MK

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  • in reply to Former Member

    Generally speaking you can't measure capacitors in circuit with low cost tools - it can be done for production designs where the cost of test gear is not a problem and there is enough information to set the tools up.

    Measuring decoupling capacitors in circuit is very difficult - they are usually in parallel with many other capacitors and shunted by semiconductor parasitic effects.

    I'm not sure why you need to measure caps accurately  - for repair work I would expect a DMM to be quite good enough. Why not buy a few polyester caps in the 10nF to 1uF range and check them (5% parts should be available) but if you have some 1% resistors, a sine wave generator and an AC meter (DMM should do) you can calibrate the caps.

     

     

     

    MK

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