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testing ohms question

Discussion in 'New Members Forum' started by telegraph, Jan 1, 2014.

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  1. telegraph

    telegraph Senior Member ECF Veteran

    Mar 24, 2013
    TN, USA
    When building a new coil, does it have to be tested with liquid on it, or can it be tested dry? I see videos where someone puts it on a battery to test dry, and I read somewhere else it needs to be wet.
    Thanks in advance!
  2. Sthur

    Sthur Vaping Master Verified Member ECF Veteran

    Aug 14, 2013
    I normally build my coil and then check the ohms, lastly put on a battery without top and fire to see the coil light up nice. If the coil lights up, take off add cotton, assemble, fill tank up, and let wick for couple and vape.

    Dry fire coil also helps get contamination off it for the first fire.
  3. Kaisen

    Kaisen Senior Member ECF Veteran

    Oct 1, 2013
    Minneapolis, MN
    If you are testing with a dedicated ohm-meter then dry is preferred. They only put a very small voltage through the coil.

    If you're testing with your vv/vw device that has a built-in Ω display, you may want some liquid there so you don't get a burnt taste when you finally use it
  4. Baditude

    Baditude ECF Guru ECF Veteran

    Apr 8, 2012
    Ridgeway, Ohio
    When you are new to building your own coils, you should have a dedicated ohm reader or a digital multimeter. This can be done when the atty is off of the battery device. If you happened to have made a sub-ohm coil by mistake, the ohm meter on a regulated mod may not be able to measure it, or recognize it as a defective coil and display "LO" or an error code.

    Once you are more familiar and experienced making coils, and have a set routine of the same wire gauge, number of wraps, etc, this is not as critical. However, its still necessary to measure the coil resistance to assure you won't be pulling more amps from your battery than its amps in continuous discharge rate. Use the Ohm's Law Calculator to confirm this.

    You don't need to put e-liquid on your wick/coil until after you've checked the coil for shorts and an even glow across the length of the coil.
  5. etchie

    etchie Super Member Verified Member ECF Veteran

    Are you sure you're not thinking about pulsing to find hotspots? If that's the case, you just can't do that dry with cotton.
  6. telegraph

    telegraph Senior Member ECF Veteran

    Mar 24, 2013
    TN, USA
    thanks. I'm not using cotton, just silica wick. Should each wrap of coil light up at same time? Seems like one lights, then the next, then the next, and so on until all light.
  7. tj99959

    tj99959 ECF Guru ECF Veteran

    Aug 13, 2011
    So the correct answer is "it depends".

    Are you testing with an ohm meter, are you testing with your PV, is there a wick in the coil, what is the wick made of ..... pant-pant, can I catch my breath before I go on with the list of things that will change the answer?!?
  8. floridaBMW

    floridaBMW Super Member Verified Member ECF Veteran

    Sep 26, 2012
    S. Florida
    No u don't need to have wick wet to test coil ohms (silica). I use my Provari most my builds, I have a meter also. The coils may light up sort of one after the other on ur first or second firing. After which they should all light up simultaneously.


    Sent from my iPhone using Tapatalk
  9. telegraph

    telegraph Senior Member ECF Veteran

    Mar 24, 2013
    TN, USA
    I am testing with a PV - VV gripper and MVP2. Yes, there is wick in coil - silica.
    What else?

  10. shorestyle

    shorestyle Senior Member Verified Member ECF Veteran

    Dec 18, 2013
    Richmond, BC
    Most vv/vw will read sub-ohms, they just won't let you fire it.
  11. edyle

    edyle ECF Guru Verified Member ECF Veteran

    If you are using an ecig battery to check the ohms then you should put it wet; your ecig battery isn't really a tester and probably expects a wet coil. You battery might be putting out high current and if the coil is dry it is possible your coil could get burnt out.

    If you are building coils you should have your own multimeter and use that to measure ohms; measuring ohms does not need wet.
  12. telegraph

    telegraph Senior Member ECF Veteran

    Mar 24, 2013
    TN, USA
    Ok, I got a Klein MM200 multimeter. Is this good for testing dry coils? It is difficult to hold the leads in the appropriate (+ and -) places.

  13. edyle

    edyle ECF Guru Verified Member ECF Veteran

    Sounds good; guess you could use some aligator clip wires too; hadn't thought of that; I usually have those.
  14. floridaBMW

    floridaBMW Super Member Verified Member ECF Veteran

    Sep 26, 2012
    S. Florida
    Using ur PV to meter your builds is fine as u get started. I know u mentioned u bought a meter also which is good. When building with silica IMO u should measure, adjust and test burn dry. It will allow u immed visual results as wetting will force u to burn off the juice first to see if ur coils r glowing evenly. I set up my KF using silica and on top of my Provari every time. I use the PV to double check my build. I've built it this way for a year but still always meter it out. U should visit the RBA section, lots of info.


    Sent from my iPhone using Tapatalk
  15. Chris Black

    Chris Black Full Member

    Jan 2, 2014
    A, A
    I test on a vamo normally dry then test fire cover with juice then do it all over agin
  16. Jake6731

    Jake6731 Senior Member ECF Veteran

    Nov 6, 2013
    It should not matter wet or dry..
  17. Stosh

    Stosh Vaping Master ECF Veteran

    Oct 2, 2010
    I'll check it dry, test fire it at low voltage to make sure it glows evenly, wet it down, check the ohms again, test fire it again, THEN fill it up and put it next to my face....:) The extra checks may take all of 30 - 60 seconds.
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