Measuring short with Multimeter Q.

[wasilikoslow]

Hello vapers. I havent get my ohm reader yet so I got multimeter instead. I built a coil and came at 1.0 ohm. then I switched it to diode and it came at 0.

is that mean there is a short in my atomizer ?
thanks.

 

[DavidOck]

Don't use the diode test setting on your DMM. It's for checking diodes, which pass DC in only one direction. Will NOT give correct resistance reading on, well, a resistor like your coil.

Use the lowest ohm setting (typically 200), short the leads to each other and note the reading. That's the resistance of the test leads and probes. Then read your coil and subtract that lead resistance.

 

[Ben85]

No it doesn't.

Just measure using the resistance setting on your meter. Does it still say 1 ohm?

 

[wasilikoslow]

15419339_1485089048187918_181202292_o — Postimage.org
as you can see, I did measure ohm with 200 (one left) yeah I short the leads each other came out 0.1 and atomizer came at 1.1 so I assume its 1.0 ohm and I switched it into whats in the picture to see if there is a short or not and it came at 0

oh I cant post pictures... I am a new user

 

[DavidOck]

Nope, not yet!

Sounds like your procedure is correct, so 1.0 Ω also sounds correct. And, if you're not running on a mech, a quick press of the fire button should allow your mod to read the resistance as well. If they're the same (or REAL close, as there's often a bit more resistance through the connections, and not all meters are calibrated....), you're good.

 

[Eskie]

Nope, not yet!

Sounds like your procedure is correct, so 1.0 Ω also sounds correct. And, if you're not running on a mech, a quick press of the fire button should allow your mod to read the resistance as well. If they're the same (or REAL close, as there's often a bit more resistance through the connections, and not all meters are calibrated....), you're good.

If the OP has a regulated mod that displays resistance, there's not much need for using a multimeter.

I do use a 521 tab to build on so I can see the resistance and fire the coils without relying on my mods to build on, but if I didn't have one, the mods themselves would be fine to use as well.

 

[wasilikoslow]

I wish I had a regulated mod... I have a mech mod so I am having hard time. my order is in transit, I think I will get it in couple of weeks... I dont even know if will the customs let my order pass..

 

[daviedog]

15419339_1485089048187918_181202292_o — Postimage.org
as you can see, I did measure ohm with 200 (one left) yeah I short the leads each other came out 0.1 and atomizer came at 1.1 so I assume its 1.0 ohm and I switched it into whats in the picture to see if there is a short or not and it came at 0

oh I cant post pictures... I am a new user

If there was a short, your meter would read "open"..
Edit ; 0 resistance.

 

[KenD]

If there was a short, your meter would read "open"..

An open circuit is different from a short. The opposite in fact. An open circuit has no resistance at all, and won't draw any amps, whereas a short is a very low resistance, drawing lots of amps.

Sent from my M7_PLUS using Tapatalk

 

[Eskie]

OK, no regulated mod, yes a multimeter is the way to go. And as @DavidOck already pointed out, don't use the Diode setting.

 

[daviedog]

An open circuit is different from a short. The opposite in fact. An open circuit has no resistance at all, and won't draw any amps, whereas a short is a very low resistance, drawing lots of amps.

Sent from my M7_PLUS using Tapatalk

Short circuit= no voltage, 0 resistance.
Open circuit= no current, infinate resistance.

 

[KenD]

Short circuit= no voltage, 0 resistance.
Open circuit= no current, infinate resistance.

Infinite resistance, yes of course. I got that wrong. However, a short circuit will always have some resistance, though very low.

Sent from my M7_PLUS using Tapatalk

 

[K_Tech]

Yes, as others have stated, the resistance setting is the one you want. I've really only used Fluke DMMs the last several years, and on the "Diode check" setting they don't display resistance, they display the voltage drop across a diode when forward biased.

 

[Bunnykiller]

Short circuit= no voltage, 0 resistance.
Open circuit= no current, infinate resistance.

that sounds counter intuitive.... how can one measure resistance if there is none ???
( open circuit = no resistance, one needs a circuit to measure resistance )

 

[daviedog]

that sounds counter intuitive.... how can one measure resistance if there is none ???
( open circuit = no resistance, one needs a circuit to measure resistance )

Can you read a simple schematic? If so google open circuit, short circuit, & closed circuit. Becomes apparent.
Yes, it is not intuitive. The physical universe rarely is..

 

[Alien Traveler]

OK guys.
Short circuit will never have 0 resistance - it should include a power source, and any power source has it's own resistance.
Nothing is really simple. Especially cooking. Electricity, compared to cooking, is the simplest thing in the world.

 

[K_Tech]

OK guys.
Short circuit will never have 0 resistance - it should include a power source, and any power source has it's own resistance.
Nothing is really simple. Especially cooking. Electricity, compared to cooking, is the simplest thing in the world.

Well, unless you're measuring a superconductor.

 

[Eskie]

Well, unless you're measuring a superconductor.

All you had to do was look around and see the container of liquid helium was missing to know that wasn't the problem.