Discharging High Voltage Capacitor with a DMM

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  • Опубліковано 3 січ 2025

КОМЕНТАРІ • 20

  • @LawpickingLocksmith
    @LawpickingLocksmith 10 днів тому +4

    Merry Christmas Joe. Now I better pick up my shoephone and ring Dave to see if he has a Boxing Day sale!

  • @SIXSTRING63
    @SIXSTRING63 11 днів тому +1

    Great video Joe as always. Very informative thing to know. Most meters I own are the brands you used in the test that had no issues handling it. A Merry Christmas to you and your family too. Don’t forget a nice rawhide bone for that sweet pooch. I can hear that nice bark, great watchdog I can guess.

  • @guateque1718
    @guateque1718 10 днів тому +1

    Awesome video. Merry Christmas Joe.

  • @StrawDragon
    @StrawDragon 10 днів тому +2

    Glad I bought a fluke and not Dave's meter!

    • @LawpickingLocksmith
      @LawpickingLocksmith 10 днів тому +2

      But if you do it again, Harry will prove that it is not a Fluke?

    • @s_s-g4d
      @s_s-g4d 7 днів тому

      I'd love to have both, in addition to those I already have.

    • @clems6989
      @clems6989 5 днів тому

      Abusing any tool will result in failure. Using proper procedures will prevent such damage.

  • @jzl300z
    @jzl300z 7 днів тому

    Thank you for these videos! As a rookie with newfound interest in electrical work/electronic repair, I’ve decided to buy my first meter.
    I would always just borrow my father’s 20yr old 73 III Fluke when doing basic work around the house. I see the Brymen do well in your videos.
    I have the option to buy a new Fluke 87 V or Brymen 869s for the same price. Which would you buy? I mainly want it for electronic work (R/C, Drone Soldering/building, PCB testing etc) and basic electrical work around the house (not doing your capacitor test anytime soon 😂). Thanks for any feedback!

  • @s_s-g4d
    @s_s-g4d 7 днів тому

    fundamentally, it's important to understand that there is _energy_ stored in the capacitor. in order to discharge it, that energy has to be converted to some other form or moved elsewhere. using a DMM means that this energy will be converted to heat dissipated inside the meter. it may or may not damage the meter.
    I would rather use an appropriate resistor for this purpose.

  • @MrDoneboy
    @MrDoneboy 11 днів тому +3

    Hard to kill a Fluke. Just ask Dave about that!

    • @joesmith-je3tq
      @joesmith-je3tq  10 днів тому +1

      My first DMM was a Fluke. It had no input protection and was easily damaged. ua-cam.com/video/ObKomuLLqU8/v-deo.html

    • @LawpickingLocksmith
      @LawpickingLocksmith 10 днів тому +2

      @@joesmith-je3tq I bought a Fluke true RMS for 4 months of wages after I had lost a fight with the chief engineer of Salora Television. He had claimed to have designed a power saving circuit but was using a gen 1 nixie meter that showed him wrong results. Then my Fluke died!

    • @joesmith-je3tq
      @joesmith-je3tq  8 днів тому +1

      @@LawpickingLocksmith Normally any bet about free energy, perpetual motion is an easy win. If you lost 4 months wages with a damaged meter attempting to prove them wrong, you definitely lost that fight.

  • @reedreamer9518
    @reedreamer9518 11 днів тому

    Those are some nice meters - too bad they are all "blown up". ; )
    I wonder what meter you have for personal use?

    • @clems6989
      @clems6989 5 днів тому +1

      Prolly a cheap chinese clunker....lol

  • @m80116
    @m80116 6 днів тому +2

    Meter manufacturers should really watch your videos to get a couple of things or more sorted out... rechargeable batteries naah, what a shame.

  • @aurthorthing7403
    @aurthorthing7403 11 днів тому

    Curious that you don't use parts from an actual microwave... they are cheap as chips.

    • @joesmith-je3tq
      @joesmith-je3tq  11 днів тому +7

      The polypropylene capacitors were chosen for the their high dv/dt and peak current ratings.

    • @joesmith-je3tq
      @joesmith-je3tq  11 днів тому +3

      Link to the datasheet for the parts I am using if you're interested: www.cde.com/resources/catalogs/940C.pdf

  • @FISHERMAN33RUS
    @FISHERMAN33RUS 10 днів тому

    Uni t is managed to leave uncooked 😂...