The relationship between temperature and wattage

[Asmani]

In the temperature mode of vaporesso Target Pro, the wattage is shown real-time. I set the temperature at 315C for SS coil. The wattage has fluctuations, like 17-22w. However, sometimes the wattage is way higher at the same 315C degrees with the same SS coil, like 30-38w. The vapor is hotter and tastes burnt. What causes the difference? Is it the box malfunction?

Generally, is it better for the coil to vape in temperature mode?

 

[Asmani]

Just 10 minutes ago, my vape was showing the resistance 0.52 and wattage was 30+ at 315C. Now it's back to normal, 0.50 resistance and 17-22w. Occasionally the resistance jumps to 0.65, but that doesn't affect the temperature mode.

 

[Imfallen_Angel]

Hi, check my blog, I explain the basics of temp control.

It's normal that the resistance increases as you vape as that's how TC works, but from 0.5 to 0.65, that's not normal, it shouldn't be more than a few numbers.

The watts are what is going to make the coil reach the temp setting, but the temp setting is where the mod is supposed to stop the wattage and then pulse to maintain that "temp". The only thing about the wattage that will matter is if you can set it in temp control mode, if it's too low, the coil will take a while to reach the temp setting. But normally, you could set it very high and it shouldn't matter.

I set my mods at 50-70W, but with my temp set at where it's good, almost always, the watts never even come close to it.

Examples.. (looking at a few of my mods right now, but note that I'm only using various RTAs and on various mods)

1) 0.25 ohm (dual coils) - settings at 50W, 370F - running (as it hits 370F) 50W for preheat/pulses around 25W once reached.

2)0.23 ohm (dual coils) - settings at 60W, 400F - running (as it hits 400F) 60W for preheat/pulses around 45W once reached.

3)0.89 ohm (single coil) - settings at 50W, 240F - running (as it hits 240F) no preheat/pulses around 30W once reached.

4)0.75 ohm (single coil) - settings at 60W, 370F - running (as it hits 370F) 60W for preheat/stays and pulses at 60W.

5)0.85 ohm (single coil) - settings at 60W, 340F - running (as it hits 340F) 60W preheat/pulses around 40W once reached.

All of these provide me with the same experience (vapour production and heat, no dry hits at all)

Make sure that you lock your ohm (if the mod allows you to do so) when your coil is cool (room temperature).

But why you're getting dry hits would by that the wicking of your coil isn't fast enough, but you shouldn't get them regardless as that's what TC is meant to prevent. The only way that can happen is it's hitting the coil too hard and toast the coil a bit before the TC kicks in.

Try taking your tank off for 5 minutes, put it back on and tell it it's a new coil and lock it then. Sometimes it can happen that a mod misreads a coil during usage and that throws the TC setting completely off. Sometimes, the coil isn't that stable and causes fluctuations. Manufactured cartridges aren't the most reliable.

 

[Asbestos4004]

I might be misunderstanding your question , but SS resistance fluctuates. Can you lock in your resistance with that mod?

 

[Asmani]

I haven't seen resistance lock in my mod. When I hold fire+up buttons it says "system locked", that is, I can't change the wattage or temp until I unlock it.

 

[Asmani]

settings at 50W, 370F

Your mod allows you to set limit for both wattage and temperature at the same time? What's your mod?

but from 0.5 to 0.65, that's not normal

It actually happens very often. It gets resolved when I restart the mod.

 

[93gc40]

Don't forget. TC control coil surface heat... not vapor temperature. .. so a big coil with lots of wire mass take longer and more power to reach set temp. But due to that extra mass of metal also holds more heat so needs less power to maintain a set temp.

A big coil a 400f will make hotter vapor than a small coil at 400f.

Sent from my SCH-I605 using Tapatalk

 

[stols001]

Resistance jumping around is somewhat normal for TC, but as has been pointed out, that's a rather large jump. What wire material are you using, and what are (all) your TC settings? I'll see small resistance changes in my SS wire over time, it's going to be small though. Such large fluctuations would cause me some worry (about how my mod is reading the coil, or the build itself). I might check your build and make sure everything is screwed down tight, there are no extra length on the legs, and make sure no wire is floating around on your deck somewhere.

Best of luck,

Anna

 

[Beamslider]

The Manual for the Target Pro says to lock/unlock resistance hold the + and - Buttons at the same time for two seconds. A lock icon will appear.

You can try locking and see if it helps. If not it is some other problem.

http://cdn2.hubspot.net/hubfs/2191257/downloads/user_manuals/Target_Pro_-20160517-for_website.pdf

 

[ScottP]

In the temperature mode of Vaporesso Target Pro, the wattage is shown real-time. I set the temperature at 315C for SS coil. The wattage has fluctuations, like 17-22w. However, sometimes the wattage is way higher at the same 315C degrees with the same SS coil, like 30-38w. The vapor is hotter and tastes burnt. What causes the difference? Is it the box malfunction?

Short answer: Yes it sounds like a box malfunction, specifically in the resistance reading.

Long answer: Here is how TC works. For TC to work you have to use a wire material (such as SS, and Titanium) that increases resistance as temperature increases in a linear and predictable manor. As you fire it the device constantly reads the resistance of the coil and performs calculations to determine how many degrees the temp of the coil has increased from the baseline. Once the resistance of the coil indicates the desired temp has been reached the mod reduces wattage to try and maintain that temp and resistance.

In this case sometimes it seems the device is reading the baseline coil resistance quite a bit higher so it thinks it needs to be that much higher resistance in order to be at the appropriate temp. Therefore more wattage is applied than is necessary and thus you are vaping at a temp that is higher than you have set.

For every 0.01 Ohms the reading is off, can throw off the accuracy of the temp control by 17-32 degrees Fahrenheit. If your mod reads a .50 ohm coil as .65 ohms, that could easily be a 300+ degree F difference giving you that burnt taste. As you can see, the mod HAS to be accurate at reading resistance. Locking the resistance is there to lock in that baseline resistance reading, BUT you have to do that when the coil is cold (room temp) and not already semi-warm from use. Hope this helps.

 

[zoiDman]

In the temperature mode of Vaporesso Target Pro, the wattage is shown real-time. I set the temperature at 315C for SS coil. The wattage has fluctuations, like 17-22w. However, sometimes the wattage is way higher at the same 315C degrees with the same SS coil, like 30-38w. The vapor is hotter and tastes burnt. What causes the difference? Is it the box malfunction?

Generally, is it better for the coil to vape in temperature mode?

315C is Hot Hot Hot.

If you set a Temperature Limit that High, you really aren't using TC. Unless the your Mod does TC Different than most.

 

[ExtremeDooty]

Why are you vaping at 315C? That's the absolute maximum temperature for the Mod and probably why you're burning up the coil especially if it's a ceramic coil. It's kind of like getting into your car and pushing the gas pedal to the floor and keeping it there. I have two Target Pros that work really well at 200C or less.

 

[QcVaper]

In the temperature mode of Vaporesso Target Pro, the wattage is shown real-time. I set the temperature at 315C for SS coil. The wattage has fluctuations, like 17-22w. However, sometimes the wattage is way higher at the same 315C degrees with the same SS coil, like 30-38w. The vapor is hotter and tastes burnt. What causes the difference? Is it the box malfunction?

Generally, is it better for the coil to vape in temperature mode?

i use SS as my main wire to rebuild my rdas and although you can use SS in BOTH power and temp control,i largely prefer temp control as i can have a better vape and change temp based on the juice im using.
the fact your mod changes wattages by itself in said temp control seems odd to me but I don't own that mod so I can't comment on it unfortunately.

Sent from my SM-G935W8 using Tapatalk

 

[Beamslider]

I think he is talking about the wattage applied to the coil while vaping and not the wattage that was set on the mod. The mod is varying the power applied to the coil while vaping in TC to maintain temp and this is maybe what he is seeing

 

[untar]

I haven't seen resistance lock in my mod.

It's fire and (-) button to lock/unlock resistance
http://cdn2.hubspot.net/hubfs/21912...uals/Target_Pro_Mod_-20160517-for_website.pdf
What you did was locking the system, which does nothing for TC.

With no atomizer on it press the fire button once so that it shows "no atomizer", then screw your atty, which has to have a coil at room temperature, on the device and it will ask new/old question, select new.
Then lock the resistance like explained above and that is the resistance your mod will base its calculations on.

 

[bwh79]

315C is Hot Hot Hot.

= 599F.

 

[Imfallen_Angel]

I haven't seen resistance lock in my mod. When I hold fire+up buttons it says "system locked", that is, I can't change the wattage or temp until I unlock it.

untar just provided you with the instructions (kudos to untar).

Most mods have this as it's a fairly default thing to do when using TC.

Some people might argue it, usually the DNA crowd, but I consider it a "best practice".

As for your question about my mods, I have some from several brands...Eleaf, Smoant, Lost vape, Joytech, Smok, GTR,, and various models from some of them.

 

[zoiDman]

= 599F.

Yeah... That is kinda like setting your A/C to come on at 140F.

And then wondering why it is so Hot in your House? And if your A/C is Broken?

 

[Rossum]

Resistance jumping around is somewhat normal for TC,

No, it should not "jump around". It should increase in a predictable way as the coil temperature increases.

If it "jumps around" that makes for a very unpredictable experience with TC.

In my experience with TC (admittedly limited to back in the day when the DNA40 was state-of-the-art) "Jumping around" is usually indicative of a dodgy connection somewhere between the regulator board's output terminals and the actual coil in the atty. Totally solid connections everywhere between those points are a must for reliable TC.

 

[Asmani]

Now I have a big concern. If it takes around 20w to reach 315C (600F) temperature for my coil, then what is happening when I vape at 30w? Is it the reason my coils have such a short life-time? It is indicated on my Vaporesso cCell that 20-35w is the range. So I shouldn't trust it and keep vaping below 20w?

I like the warm vapor produced at 30w. Is there anyway to get that without damaging the coils?