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  1. #11
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    Quote Originally Posted by degnr8 View Post
    Always always always check your coils on a meter
    Same question: what am I looking for by reading them on a meter?


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    Quote Originally Posted by bones1274 View Post
    I just wrapped a 28 gauge 8 wrap micro coil tonight and it metered at 1.03 ohms. If you are doing a dual coil, that would put you down to about .5 ohms..... can your mod and batteries handle that low of ohms?
    You tell me. I use AW ImR18490


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  3. #13
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    Quote Originally Posted by OuchingMegaSpank View Post
    Ok. I used to check them on my SVD (which I only use to check a coil resistance anymore) but it stopped reading them. I think it's a pin problem. Regardless, if I check it in a meter, it's going to say 1.2, 1.4, whatever, and I'm going to say "oh yeah, great!" And I'm going to vape away anyway. What am I hoping to find by reading the ohms? (I know this sounds sarcastic, but it's not)

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    Does the SVD read non (I think is the code) or just blank screen?

  4. #14
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    Quote Originally Posted by OuchingMegaSpank View Post
    You tell me. I use AW ImR18490


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    3.9V @ .5 Ohm is 30 Watts 7.8Amps (Is this calculator broken?)

    Info on the AW x490 battery (From Empire Mods Website)

    Safer Chemistry Then Lithium-ion Batteries
    Nominal Voltage : 3.7V
    Capacity : 1100mAH
    Lowest Discharge Voltage : 2.50V
    Standard Charge : CC/CV ( max. charging rate 3A )
    Cycle Life : > 500 cycles
    Max. continuous discharge rate : 8C
    Operating Discharge Temperature : -10 - 60 Degree Celsius
    Last edited by bluecat; 10-31-2013 at 09:19 PM.

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    Quote Originally Posted by Steam Turbine View Post
    Oh yeah... I forgot: Being clueless about coil resistances is unacceptable!
    Please enlighten me


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  6. #16
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    Basically you learn one thing from checking the resistance directly and another thing by using the number you get.

    Directly you will know if there is a short in your coil which can be a dangerous thing. My vamo throws an error when I check a shorted coil. My little atty ohms checker box the reading jumps around when there is a short. Shorts need to be fixed immediately to avoid damage to you, your devices or your batterys.

    It gives you the ohms of your coil which you can then put into an ohms law checker along with the volts you are vaping it at. you will get the amps of that combination. that amps number really needs to be less (preferably by a fair margin) than the amps limit of your specific battery. If you push a battery too far it can vent rather violently causing property damage, personal injury or fire. This even happens with almost no warning so far better to know up front and take steps to avoid it such as knowing the amps you need the battery to be able to output and choosing an appropriate battery that can handle that load.

    I am sure there is more but this is a basic rundown for you.
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    Quote Originally Posted by bluecat View Post
    Does the SVD read non (I think is the code) or just blank screen?
    Reads non. So what are my main concerns? Amps? I believe my AWs are good for 16.5 amps


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  8. #18
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    @OP (love the name and avatar BTW) I'm not sure if you're trying to be disagreeable or are actually unaware of how dangerous a battery explosion can be. Just in case it's the latter I'll reiterate that guessing at your resistance and battery capabilities are a really bad idea. You need to find out for sure how many amps your battery can handle, do an ohms law calculation and figure out the lowest your resistance can be and stay safely above that discharge rate. You are right though that knowing the resistance doesn't do any good whatsoever if you don't know how to apply the information. That's why you need the discharge rate of your batt and a familiarity with ohms law. Thermal runaway in your face could kill you or make you wish it had. If you check out Baditude's blog it should have the ratings for your batteries.
    dedi and OuchingMegaSpank like this.
    Vini, Vidi,Vape

  9. #19
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    I believe the AW 18490 has a max continuous discharge of 8.8 amps, I could be wrong on that though. There are multiple reasons to check the resistance on your atomizer, like has been said you want to check for shorts, and to make sure you're within the limits of your battery, and finally, if you're building dual coils which I think you said you were, you want to make sure that both coils are attached properly. If you build two 1.4ohm coils and attach them, you should get a 0.7ohm reading. If you get anything other than that, something is wrong and you should figure out what it is.

    Avid micro coil enthusiast. #adultslikeflavors

  10. #20
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    Not being disagreeable. I think my problem has been that I am reading things incorrectly. I copied the following of of here and maybe I need someone to explain to me what means what. You guys are right. I've probably been lucky so far:

    AW IMR
    18650 2000mah 10A (5C)
    18650 1600mah 24A (15C)
    18490 1100mah 16.5A (15C)
    18350 700mah 6A (8.6C)
    14500 600mah 4.0A (6.7C)

    EFEST IMR
    18650 2000mah 10A (5C)
    18500 1100mah 8.8A (8C)
    18350 800mah 6.4A (8C)
    14650 950mah 9.5A (10C)
    14500 700mah A (C) (No information found on this one)

    EH IMR
    18650 2000 mAh 16A (8C)
    18500 1100 mAh 8.8A (8C)
    18350 800 mAh 6.4A (8C)
    14500 600mah 4.8A (8C)

    MNKE
    IMR18650 1500mah 20A (13.3C)

    Panasonic
    CGR18650CH 2250mAh 10A (4.4C)
    NCR18650PD 2900mAh 10A (3.4C)

    Samsung
    INR18650-20R 2000mah 20A (10C)

    Sony
    us18650v3 IMR 2250mAh 10A (4.4C)
    SE US18650VTC3 1600mAh 30A (18.75C)



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