Amperage drop in Mech Mods

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propofokgov

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Has anyone else noticed a significant drop in amperage between different mech mods or is it just mine?

Yesterday I was hanging out at the local vape shop with a few buddies and we got to playing around with various mech mods. I happen to use a SmokTech Magneto with an Aqua Tobeco clone tank and I wanted to see what they would look like and handle like on Grand vapor clones of the Sentinel M16 and Private Mech Mods.

After switching tanks and batteries, this is when I really started to notice the difference. The Sentinel and Private were giving me a way better, more full bodied vape than the Magneto that I had been using for so long. So when I got home I started testing my magneto and I was getting an amperage drop of anywhere between 3-7 amps! Not voltage, but AMPERAGE!

What I can't figure out is why, and I guess that's why I'm posting this here. I'm looking to brainstorm on why I've got such an amperage drop or of its common amongst certain mech mods. Hell, AFAIK I could be testing it wrong.

What do you guy's think?
 

propofokgov

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This is some great information, thanks for posting it!

I need to get to a computer to do some more searching in that thread. Looking at the graphs I didn't see any tests already done on the magneto. I hope to get a better chance to read that thread tomorrow. That being said, all of the test conducted didn't show an amperage drop over 1 amp which leads me to wonder if there is something wrong or an issue with my mod.

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propofokgov

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How are you testing for amperage drop? Never heard of this.

That's where I might be doing it wrong. I took my volt meter & tested the amperage of the battery, then put that same battery in the mod & tested for amperage by touching the head & head pin.
 

Jimi D.

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That's where I might be doing it wrong. I took my volt meter & tested the amperage of the battery, then put that same battery in the mod & tested for amperage by touching the head & head pin.
Now try the same thing on the multimeter but by selecting volts. You should see a voltage drop as well.
 

K_Tech

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There is no mech that has zero internal resistance. Even if it's 0.1 ohms, it's going to affect the overall resistance of the circuit. A better built mech made with lower resistance materials will obviously have lower internal resistance than a poorly made mech, but it still will be some value of resistance.

That's where I might be doing it wrong. I took my volt meter & tested the amperage of the battery, then put that same battery in the mod & tested for amperage by touching the head & head pin.

This confuses me. So you're putting your multimeter on its "Amperage" setting, and putting the leads across the battery, and then across the contacts of the mech? That would almost instantly blow the fuse on my multimeter (Fluke) because it has a current limiting fuse with a 10 amp rating...
 

propofokgov

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I forgot to mention that I did this 5 times to 3 different batteries and received consistent results with all tests.

...This confuses me. So you're putting your multimeter on its "Amperage" setting, and putting the leads across the battery, and then across the contacts of the mech? That would almost instantly blow the fuse on my multimeter (Fluke) because it has a current limiting fuse with a 10 amp rating...

As far as this goes, I too have a fluke so I'm not sure why it worked (in heinsight), but it did... Consistently. Tested 30A batteries at 30A, voltage at 3.7v.

Now try the same thing on the multimeter but by selecting volts. You should see a voltage drop as well.

I just re-tested everything and yet still the same results. Thus time I tested voltage as well and only saw a drop of. 01v.
 

StarsAndBars

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Hard to complain about a .01 Voltage drop. That's pretty dang good man. Still not sure why you'd be trying to check amperage with a meter. Just divide 4.2 by (resistance of coil + resistance of mech) to get amperage. It's just easier to do mathematically, since amperage is just the drain on your battery and a result of voltage/resistance.

Hope that makes sense dude.
 

propofokgov

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Hard to complain about a .01 Voltage drop. That's pretty dang good man. Still not sure why you'd be trying to check amperage with a meter. Just divide 4.2 by (resistance of coil + resistance of mech) to get amperage. It's just easier to do mathematically, since amperage is just the drain on your battery and a result of voltage/resistance.

Hope that makes sense dude.

Totally, & thanks for the tips!

Your right that such a small voltage drop is little to complain about. The reason I was testing the amperage was to try and determine why there was such a vape difference between my Magneto Mod & a friends Private Mod while using the same battery. More than one person noticed the difference so I was trying to find out why, figuring it was the amperage.

It's confusing knowing the voltage drop is so low on the magneto. If the voltage drop is so low, what else could it be (genuine question).
 

roadie

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When you tested the amperage drop, were you testing IN the circuit? That is, in series with it? I don't see an easy way to do this............

Amperage cannot be tested the same way voltage drop can. To verify current you need to be in series with the circuit and having current running through the meter, and to test voltage you are in parallel with that particular component.
 
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Tbev

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Also I think your voltage drop test is a bit flawed as well. 0.01 is as good as it gets, I don't think that's correct especially if your testing the mod that was out preformed by the private at the shop. You have to be under load, I believe, to treat voltage drop, I think your getting 0.01 as the internal res. Of your mod without a load, not u under power.

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State O' Flux

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I forgot to mention that I did this 5 times to 3 different batteries and received consistent results with all tests.
As far as this goes, I too have a fluke so I'm not sure why it worked (in heinsight), but it did... Consistently. Tested 30A batteries at 30A, voltage at 3.7v.
I just re-tested everything and yet still the same results. Thus time I tested voltage as well and only saw a drop of. 01v.
After having read this thread, I can't help but want to un-muddy some, apparently, very muddy water.

Sorry if I'm a bit wordy... it's a character flaw.
crazy.gif


To summarize where Jimi, K_Tech, Tbev and roadie are going, but may be too polite to come right out and say - your testing methodology and results are, at first read, incorrect - and in some instances, near impossible.
I don't believe anyone here (in thread, so far) is an accredited electrical engineer or electronics expert, but when 5 people question both your data and explanations for obtaining that data, you have to consider that you've made a misstep.

Not to say that you're lying, or delusional, or "having us on", or that we want to put you on the spot or shame you... or any other inappropriately childish behavior, but rather, I ask these questions so that we may obtain a more clear picture of things.
If we can get a grip on your process', your data would be either accepted or declined, and if declined... hopefully an answer as to why, and perhaps recommendation for correction.

If you don't mind answering a few questions, with clear and accurate detail please -

  • How much experience do you have with DMMs and have you ever worked in the field of electrical diagnostics?
  • What model Fluke and how long have you owned it - and how frequently do you use it?
  • Are you auto-ranging, and to what range if any and what readings (including decimal point) for each test?
In addition and on the physical side of things, for each test conducted -

  • What test leads (and adapters), plugged into what ports... and on what switch settings?
  • And last but not least, where are you making contact with the battery, the mech and the atty - again, for each test.
If this could be done in a technical presentation format, with bullet points or enumeration for easier dissemination, that'd be a bonus for me... as I didn't make it past 5th grade, and my computer is made by Etch A Sketch. :D

If you'd rather not spend the time and energy responding to an overzealous, obsessive compulsive me... no harm, no foul. It's the interweb after all, so... you don't owe us, or more specifically me, anything. ;)
 

Oxyd

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That's where I might be doing it wrong. I took my volt meter & tested the amperage of the battery, then put that same battery in the mod & tested for amperage by touching the head & head pin.

So you shorted out the battery? Multiple times?

propofokgov said:
I was getting an amperage drop of anywhere between 3-7 amps!

And what current did you get when measuring it this way?

If you do the maths, you'll find that a drop of 7 A on a 3.7 V battery when measured your way using an ammeter with internal resistance of 0.1 Ω corresponds to a mech whose resistance is 0.023 Ω. That doesn't sound too bad.

You need to realise that an ammeter has a very low resistance (in the ideal world, it would have zero resistance) so as to minimise the effect on the circuit you're measuring. If there is no other circuit to speak of other than the battery and the ammeter, you're measuring the current of a short circuit. You know that short-circuiting batteries is a no-no, right?
 

propofokgov

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I want to thank you guy's for all your input so far on this topic. In the end I'm going to have to chuck this topic up to a misguided understanding of something I only half know about, attempting to apply that knowledge using tools that I once understood better in my youth than I do now.

The main purpose, as I have stated before, was to try and figure out why I would see such a difference in a vaporizing experience between two different mods using the same battery and the same atomizer.

At first thought I could only assume that it was a difference in the way the mod's were delivering the voltage (read as amperage), keeping an open mind that it could be something else than that. I hold the information that has been passed to me via this thread as accurate and knowledgeable and have since totally dismissed the idea that it is due to an amperage loss and I'm currently entertaining any other ideas to what I have experienced.

Also as mentioned before, I do no attest to the idea that what I did was a correct testing procedure, and based on the information I have gathered, it was not.

I guess in the end the proper thing to do would be to close this thread and open a new one with a more general and less miss-leading title :? That being said, I would still like to answer the questions asked of me. After all, the more information the better! :)

I also forgot to mention that all the "tests" I did were only on the Magneto and no other mod as at the time I only owned that MOD.

After having read this thread, I can't help but want to un-muddy some, apparently, very muddy water.

Sorry if I'm a bit wordy... it's a character flaw...

Apology accepted :) As you will soon find out, I float those same waters.

...To summarize where Jimi, K_Tech, Tbev and roadie are going, but may be too polite to come right out and say - your testing methodology and results are, at first read, incorrect - and in some instances, near impossible.
I don't believe anyone here (in thread, so far) is an accredited electrical engineer or electronics expert, but when 5 people question both your data and explanations for obtaining that data, you have to consider that you've made a misstep.

Not to say that you're lying, or delusional, or "having us on", or that we want to put you on the spot or shame you... or any other inappropriately childish behavior, but rather, I ask these questions so that we may obtain a more clear picture of things.
If we can get a grip on your process', your data would be either accepted or declined, and if declined... hopefully an answer as to why, and perhaps recommendation for correction.

If you don't mind answering a few questions, with clear and accurate detail please -

  • How much experience do you have with DMMs and have you ever worked in the field of electrical diagnostics?

My experience was once greater than it is now that I am older. As a younger lad I spent most of my days working with electronics to make tiny robots and the sort, tearing apart any spare electronic device I could and creating with that I had to work with. My direct experience with DMM's was more heavily reliant on assistance from my father who spent his whole life working in the telecommunications field. I have a basic understanding of the difference between volts, amps, DC, AC, Resistance, and connectivity and how to operate the DMM to gain a reading.

  • What model Fluke and how long have you owned it - and how frequently do you use it?

Although not the only DMM I own, the one mentioned previously is a Fluke 77 Series II DMM that I have owned for a while, so it is not necessarily new. After reading a post that my DMM should not be able to do what it did, I opened it up to check the fused 10A connections. Needless to say, the fuse looked normal and had a rating of 11A.

  • Are you auto-ranging, and to what range if any and what readings (including decimal point) for each test?

My Meter was set to Autorange. All amperage readings came out to a ##.# ever time it was tested.

In addition and on the physical side of things, for each test conducted -

  • What test leads (and adapters), plugged into what ports... and on what switch settings?

I used the ones that came with the Meter. I plugged the black lead into the black COM port and the red lead into the 10A FUSED port. The switch was set to "A*DC*"

  • And last but not least, where are you making contact with the battery, the mech and the atty - again, for each test.

For each test performed, I always made contact in the same place. When testing the batteries for amperage and voltage I made contact directly with the battery using the leads. When testing the battery in the MOD I made contact with the top of the cap and the center pin in the cap. I made no tests using the atomizer, although in hindsight I probably should have.

If this could be done in a technical presentation format, with bullet points or enumeration for easier dissemination, that'd be a bonus for me... as I didn't make it past 5th grade, and my computer is made by Etch A Sketch. :D

If you'd rather not spend the time and energy responding to an overzealous, obsessive compulsive me... no harm, no foul. It's the interweb after all, so... you don't owe us, or more specifically me, anything. ;)

Leaving people to wonder is rude :)

So you shorted out the battery? Multiple times?

Apparently I did, multiple times.

You know that short-circuiting batteries is a no-no, right?

I do now :? Have I mentioned that I could have done things wrong? This pretty much makes everything I just explained null in void doesn't it? :/

This all being said, what would be the correct way to test it? What other scenarios could cause the same atomizer to perform differently on two different mods using the same battery? Air temperature? I'm genuinely asking...
 
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Oxyd

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Have I mentioned that I could have done things wrong? This pretty much makes everything I just explained null in void doesn't it? :/

There's doing it wrong and then there's doing it wrong. Shorting a battery like that can cause it to go into thermal runaway and that wouldn't be fun.

But since there's a 10 A fuse in your meter, I guess no harm's been done. Makes me wonder why it didn't blow, though…

propofokgov said:
This all being said, what would be the correct way to test it? What other scenarios could cause the same atomizer to perform differently on two different mods using the same battery? Air temperature? I'm genuinely asking...

Air in general, yes. Airflow, air temperature, air pressure. PBusardo did a nice overview of how air affects the vape.

Voltage drop may also affect things, of course. (Not current drop.) Bad contact between your atomizer and your mod may also affect the quality of the vape – make sure the contacts are clean and are making a good connection.
 
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