DNA 200 Watt

[tchavei]

Just had a serious problem with Vaporshark DNA200.

I was using the triton II tank with a new 0.4 ohm SS coil in temp control mode. All I could get was an incredibly hot vape. Even with the temp set as low as 320F. Mod was in temp control mode and was stepping down the power.

Thought this was a problem with the new coil so switched to my crown tank with the Ni coil. Swapped to the my normal crown profile, and got the worst vape I've ever had, incrediby hot vapour and liquid followed by a massive dry hit. It was so hot I've burnt the inside of my lip on the drip tip and the inside of my mouth from the spitting liquid.

I Dropped the temperature and checked it in device manager, which showed it to be controlling at the set temperature, and dropping the power as you would expect. However the actual temperature was way hotter the the set temperature. Also tried my tfv4 mini and go the same result.

After a soft reboot and it is now working fine again, so not sure what the issue was, may be one of incident, but I certainly don't want a repeat of this. I'm also wary of using it at high watts again.

Any one else had a similar issue or know what may have caused this?

Happened to me once a few days ago. Seemed like lava shooting out of the drip tip. I solved it by intentionally firing (without taking a draw) for a couple of seconds until the board realized it was over shooting and started to work properly again. Never happen again. Works great now. No idea why it happened but I took a row of wimpy draws. The mod and atty were warm as they didn't had time to cool off.

I have a beta reference mod.

Cheers
Tony

 

[retird]

Try doing hard reboot of the device. Seems there is a bug that causes it to not fire in TL mode all the time when it should. Here's a couple captures using the same settings, atty and coil with the only difference being a reboot between the two captures. In the first capture you'll notice it doesn't monitor or report the Temperature while the Live Ohms goes to .419Ω as one would expect. On the device however it never was in Temp Mode and only displayed -----F

Edit: You can also notice there is no Preheat applied in this first attempt either another sign the device was not applying the TL algorithms since there is no Preheat in Power mode.

View attachment 508094

This one was taken with no changes to the device, atty or anything other than a Hard Reboot. Notice it now is in Temp Limiting mode and it's being measured and reported as well as Live Ohms rising similarly to the first attempt.
View attachment 508091

Wondering why cold ohm's and room temp is so different in your two graphs?

 

[Vlad1]

Wondering why cold ohm's and room temp is so different in your two graphs?

No idea, that's most likely a part of what is causing this problem. Cold Ohm's shouldn't go down then back up after firing. Almost looks as if it took the live Ohm's and locked it in as Cold Ohm's momentarily. As to the Room Temp no idea why it would have changed at all I hadn't noticed that, the device wasn't moved or touched between firings and screen capture only a Hard Reboot which was less than 2 min apart.

 

[Vlad1]

Apparently this problem has already been reported on the Evolv forum and at least James has responded to the thread so perhaps a fix is being looked into.

Hard Reboot for temp control - DNA 200 Early Adopters Forum

 

[Angus337]

I think the problem is resistance related. Happened again with the SS coil, not as bad as before but still unvapable. Seems as though the base resistance is creeping up over time, giving inaccurate temperature control.

With the SS coils on the triton, temp control seems to work ok to start with, but after a while, it appears to be calculating a lower temperature than the actual coil temperature, and so the mod doesn't regulate power early enough, resulting in a really hot vape. I originally had the temperature set to 440F and it was controlling correctly, once I started to get the problem the highest temperature it indicated was 356F even though it was far to hot to vape.

With Nickel coils I'm getting the same effect, just not as bad.

 

[tehdarkaura]

edit -- n/m

 

[Vlad1]

Thinking back to see if I could reproduce the same graphs I posted earlier I found I could. What appears to be happening in my example is that although I have a Ni200 atty on the device, if low power is supplied to the coil the device will decide it's not a Temp coil and disregard the Profile & TCR I have set and drop to Power mode. After it does this initially and leaving the atomizer attached any subsequent firings I attempt at whatever power level just disregards the Profile & TCR settings again and fires in Power mode ----F. And appears that Refinement is terminated from background processing at this point.

So it appears at least in this scenario after the initial detection of the coil if the device determines the coil is not Temperature sensing on the first firing even if it is it will continue to ignore the settings in the Profile that have been chosen.

To try to reproduce this if you'd like:

Remove existing atty & replace and force the device to detect New Coil and make sure the detected resistance is correct and not Ohm Locked. (I used a Ni200 coil)
Set Power level to 1W
Fire Device until the Temp displays ---F
Now adjust your power to 20W -40W and fire

At this point you should notice the device never fires in Temp Limiting mode and goes directly into Power mode regardless of your Power Settings, Selected Profile or TCR it's just now in Power Mode. I'm not sure if this is the same problem that some others are reporting or not, it was just what I found when I was reading (mis-reading) Landmans post. But I could easily see this same situation occur with a large enough mass coil or coils even at higher initial power settings.

Still no idea on why there was a 20F room temp variance within a couple minutes.

 

[nic_fix]

when that has happened it was probably my fault. never had it happen with any triton coils. that is strange it is happening to you. I don't doubt you but that sure is bad luck. I also do not doubt now that the dna200 has all manner of malfunctions. when they are working they do work great.

luckily the battery in my other vs came up. cells balanced. phew.

Monday I am sending out 3 dna200 mods for repair. at least they have a warranty.

 

[retird]

Thinking back to see if I could reproduce the same graphs I posted earlier I found I could. What appears to be happening in my example is that although I have a Ni200 atty on the device, if low power is supplied to the coil the device will decide it's not a Temp coil and disregard the Profile & TCR I have set and drop to Power mode. After it does this initially and leaving the atomizer attached any subsequent firings I attempt at whatever power level just disregards the Profile & TCR settings again and fires in Power mode ----F. And appears that Refinement is terminated from background processing at this point.

So it appears at least in this scenario after the initial detection of the coil if the device determines the coil is not Temperature sensing on the first firing even if it is it will continue to ignore the settings in the Profile that have been chosen.

To try to reproduce this if you'd like:

Remove existing atty & replace and force the device to detect New Coil and make sure the detected resistance is correct and not Ohm Locked. (I used a Ni200 coil)
Set Power level to 1W
Fire Device until the Temp displays ---F
Now adjust your power to 20W -40W and fire

At this point you should notice the device never fires in Temp Limiting mode and goes directly into Power mode regardless of your Power Settings, Selected Profile or TCR it's just now in Power Mode. I'm not sure if this is the same problem that some others are reporting or not, it was just what I found when I was reading (mis-reading) Landmans post. But I could easily see this same situation occur with a large enough mass coil or coils even at higher initial power settings.

Still no idea on why there was a 20F room temp variance within a couple minutes.

Tried to reproduce your findings using a Aspire nickel premade coil (only coil I use). Went thru the process you describe and it never fell out of TL and causing new coil still showed the exact resistance as before doing this procedure. At 1 watt the coil was heating around 130F to 160F (temp setting is 400F) and back at 25 watts and 400F it vaped as normal. (Preheat set to 100 watts and punch set to 5)

Wondering if this could be connectivity/grounding or device related as opposed to board/firmware related? Reason I say this is my devices has not ever showed what you are seeing and have been ran with ALL software/firmware versions since July. I'm feel sure Evolv will track down the cause.

Graph showing 1 watt:

 

[Vlad1]

Tried to reproduce your findings using a Aspire nickel premade coil (only coil I use). Went thru the process you describe and it never fell out of TL and causing new coil still showed the exact resistance as before doing this procedure. At 1 watt the coil was heating around 130F to 160F (temp setting is 400F) and back at 25 watts and 400F it vaped as normal.

Wondering if this could connectivity/grounding or device related as opposed to board/firmware related? Reason I say this is my device has not ever showed what you are seeing and it has been ran with ALL software/firmware versions since July. I'm feel sure Evolv will track down the cause.

Try a higher resistance coil. My understanding is if it doesn't reach 150F in the first 1 sec it will drop out of Temp mode. If your not dropping out of Temp mode at 130F your device is out of spec or your just eeking by the set point requirement.

 

[retird]

Try a higher resistance coil. My understanding is if it doesn't reach 150F in the first 1 sec it will drop out of Temp mode. If your not dropping out of Temp mode at 130F your device is out of spec or your just eeking by the set point requirement.

I use no other coils but my devices are both on spec. and are Evolv reference devices. The preheat I set (100 watts) brings the coil up to 160F quickly (see graph) and then drops off at 1 watt to 130F as shown in the graph thus it doesn't drop out of TL.

 

[Vlad1]

I use no other coils but my devices are both on spec. and are Evolv reference devices. The preheat I set (100 watts) brings the coil up to 160F quickly (see graph) and then drops off at 1 watt to 130F as shown in the graph thus it doesn't drop out of TL.

Well IDK, I can easily force mine to drop out of Temp mode either with SS or with Ni200. Perhaps reduce your Preheat. Mine was set at 85W but you should be able to set it very low or to 0 and force it to drop out of TL mode and then proceed to see what I'm attempting to show.

 

[retird]

Well IDK, I can easily force mine to drop out of Temp mode either with SS or with Ni200. Perhaps reduce your Preheat. Mine was set at 85W but you should be able to set it very low or to 0 and force it to drop out of TL mode and then proceed to see what I'm attempting to show.

Yep, lower the preheat so it can't make 150F within one second and it would drop out at 1 watt. Nothing new or unusual there. Try upping your preheat to, say, 150 watts and see what ya get..

 

[Vlad1]

Yep, lower the preheat so it can't make 150F within one second and it would drop out at 1 watt. Nothing new or unusual there. Try upping your preheat to, say, 150 watts and see what ya get..

The point is the result and state of the device when it drops out of Temp mode and thereafter the initial detection. What I'm demonstrating can happen with larger mass coils at medium power settings just as easily. Force yours out of Temp mode and report back your findings.

 

[retird]

Forced a drop out by reducing the preheat to 20 watts and it dropped out of TL. Stayed out of TL because it could not get 150F rise. Only change then was to up preheat to 100 watts again while in non TL mode and it immediately went back into TL mode. (when it asked new coil I said yes).

 

[Vlad1]

Forced a drop out by reducing the preheat to 20 watts and it dropped out of TL. Stayed out of TL because it could not get 150F rise. Only change then was to up preheat to 100 watts again while in non TL mode and it immediately went back into TL mode. (when it asked new coil I said yes).

So you couldn't get the 150F rise even at higher Power settings, (we really are but the device doesn't care any longer since it's decided on Power mode). But then you did a Reboot by Uploading your Preheat settings which would negate the test as previously mentioned Reboot resolves the problem.

 

[retird]

I did another quick test by setting preheat to 20 watts and wattage to 1 watt... it dropped out of TL.... raised wattage to 50 watts and it remained out of TL even though a good vape was obtained in non-TL with nickel coil.

Yep, I'm thinking the preheat is the key to getting the initial 150F rise. Set too low and it drops out and won't go back in TL. Reset preheat and upload and problem resolved. Thinking maybe a firmware tweak to better monitor switching in/out/back in for TL may be in order.

Sound about right to you?

I noticed one more thing:

While in non-tl mode and set to 50 watts (after dropping out at 1 watt) the device monitor showed the wattage going to 50 watts and then dropping back to 29 watts while vaping. In true power mode it should achieve the set wattage and throttle back as needed for stopping dry hits/burning/etc. (as I understand it). Seems right.

So I'm thinking that setting preheat to achieve 150F immediately will keep it in TL and Evolv can sort it out the other stuff discussed here.

When you upped your preheat to 150 watts what did ya get? Did it drop out of TL?

EDIT: Will do a bit more on this later...

 

[Vlad1]

I did another quick test by setting preheat to 20 watts and wattage to 1 watt... it dropped out of TL.... raised wattage to 50 watts and it remained out of TL even though a good vape was obtained in non-TL with nickel coil.

Yep, I'm thinking the preheat is the key to getting the initial 150F rise. Set too low and it drops out and won't go back in TL. Reset preheat and upload and problem resolved. Thinking maybe a firmware tweak to better monitor switching in/out/back in for TL may be in order.

Sound about right to you?

I noticed one more thing:

While in non-tl mode and set to 50 watts (after dropping out at 1 watt) the device monitor showed the wattage going to 50 watts and then dropping back to 29 watts while vaping. In true power mode it should achieve the set wattage only (as I understand it). This also may need to be looked at.... gonna pass this info to the forum.

So I'm thinking that setting preheat to achieve 150F immediately will keep it in TL and Evolv can sort it out the other stuff discussed here.

Yes we could vape on Ni200 or Ti in Power mode in some cases without choking, it just not necessarily going to be a good vape if a small mass coil is over powered / burnt and could be unhealthy and is not suggested.

I would think a firmware fix could take care of it. Personally I'd prefer that feature didn't exist or understand any major benefit of it. If I go through the trouble of setting up a Profile for a certain wire type that's what I want to vape at and don't want the device to choose otherwise for me. The only thing I can think of where it would be beneficial would be for someone that vaped Kanthal or other low resistance wire they may not need to choose a Profile. Perhaps an option to disable that feature if one didn't want it like me. One problem with how it is currently is that the Preheat setting requirement to reach 150F to keep it in TL mode will be different dependent on the type & size of the coil's being used by the individual.

As to the other anomaly you observed I didn't notice that but wasn't really looking at it close either. I would expect once they are aware of the problem they will probably know off the top of their heads where to look and what piece needs to be fixed.

 

[nic_fix]

retird, I was wondering if you also use the triton out of necessity. I have no choice if someone will not build for me. either way it is pretty close. now they have claptons.

guys, I am wondering something. why are these lipo's 900-1350mah taking me 8 hours to charge? I have tried different chargers. currently a 2.5 amp sony charger for net book. everyone tells me theirs charges in 1.5 hours. I checked the wall voltage and it is 113. my cable or something? it is a gfci so maybe that is why but I doubt that.

also, this is very strange. hana tastes better to me than vs or lost vape. I am guessing that is my imagination though. or is it?

I am sorry I am no value on the technical stuff. I did try what you say too vlad. like retird the triton behaves the same. no doubt there are issues. especially if you go looking for them I suppose. I don't mind, but dead is where I draw the line. mine are dropping like flies. I wonder if this all due to my outlet.

 

[tehdarkaura]

speaking to the charging issue -- its important to make sure the usb cable isn't overly long and is rated for 1 amp charging. what you plug it in to charge also needs to support those amps in order to get a fast charge.
If you go in escribe device monitor and attach some cables and monitor the charging current you can get an idea if some are better than others (although i think charging will be limited to 500ma for the computers USB port -- they should take an amp if the power supply gives it)