JAC Vapour Series-B DNA 75w

[Baditude]

when ever i put my original uwell crown on the Jac,
it flashes ohms too HIGH

the coil reads .57
and a NI appears on the Jac menu screen.

i am pretty sure the uwell .5 coils are kanthal.

any thoughts on what's going on?

Sounds like it thinks you have TC coil (Nickel). Try locking the power/temperature setting and then double pressing the up or down button to change the coil/material type until you get to Watts/Power?

Amazing. This happened to me last night. While changing my wattage setting I noticed the NI on my screen. I knew that meant nickle coils, but I'm still on my Crown coils (which are stainless steel if I'm not mistaken). I dug around for the owners manual to get back into wattage mode. I believe it was 5 clicks to lock the setting and then double pressing the up/down button.

 

[puffon]

Same thing happened to me a couple days ago.
Was in VW, using a RTA w/kanthal.
Put it the side pocket car door, went shopping, came back took a vape...woh! that's hot.
It was in Ni mode. Thought maybe some buttons were pushed when I closed the door, but that would be a lot of buttons being pushed simultaneously. Wonder if it's a DNA75 bug?

 

[Jingles]

I've had the same thing happen to me several times. The directions are not real clear on how to get back to wattage mode. Once you're back to wattage mode, if you lock your settings it shouldn't change to temperature control, i think.

 

[puffon]

I've had the same thing happen to me several times. The directions are not real clear on how to get back to wattage mode. Once you're back to wattage mode, if you lock your settings it shouldn't change to temperature control, i think.

I'll have to try locking the settings.
Fortunately I remembered, from my DNA40 days, how to get back to wattage mode.
5 clicks to lock > hold plus/minus > scroll past 600deg > shows off > 5 clicks to unlock

 

[Bronze]

Yes, the instructions for the DNA 75 are rather lame. I use SS and I'm set at 430 degrees for reference.

 

[skyboxer1968]

For me, it's easier to just use the wattage preset. Press and hold both the up and down buttons (for the Jac, just press in the middle) until it flashes "temp locked hold up/down". Then you can scroll through the presets and select "power ctrl watts". Press the fire button to set it, then don't forget to press and hold the middle to unlock what is now the watts setting.

Sent from my XT1650 using Tapatalk

 

[Freedom2Vape]

I usually have the Jac set for Power lock (press and hold the + and - for 2 seconds), but have still had occasions where the device switches to a TC profile. As has been mentioned above, double pressing + or - with the device in Power lock allows you to easily change profiles (I've customized them with Escribe to make it easier to tell the profiles apart).

On another note: I've had terrible luck with TC and SS coils, to the point I've given up and just use Titanium. If someone could point me to a How-to video, or perhaps give recommendations for setting up TC using SS, I would appreciate any help. I have quite a bit of Temco and Pure Atomist SS wire, but everytime I build, I keep getting a Temperature Protected message.

 

[Beamslider]

DNA Mod settings are changed by first putting the mod into DEVICE LOCKED MODE. All additional settings are made from this MODE.

DEVICE LOCKED MODE: Click the FIRE BUTTON 5 times rapidly. Screen will say “Locked click 5X” whenever a button is clicked. To go back to normal usage mode click FIRE BUTTON 5 times rapidly.

To select MATERIAL for Temperature Control or to use POWER only. First put the mod into DEVICE LOCKED MODE (5 clicks of FIRE BUTTON). While in DEVICE LOCKED MODE, hold down FIRE BUTTON and UP and DOWN BUTTONS simultaneously (all 3 buttons) and the screen will change to HOLD TO CHANGE MATERIAL. Hold until it comes up with current MODE. Then use either the UP or DOWN button to Select between materials or WATTAGE. These buttons will circle thru built in MATERIALS on the device. When the screen shows the MATERIAL you want, Click the Fire Button and it will be set.

If you want to lock the OHMS for Temperature Control. Put the Mod into DEVICE LOCKED MODE. Hold down both FIRE and UP Button. Screen will change to “hold to lock ohm”. Hold until it returns to main screen and shows a pad lock next to ohm reading. To unlock ohm reading repeat the above.

If you are using Temperature Control and want to change the maximum wattage used in TC. Put in DEVICE LOCKED MODE. Then press both UP AND DOWN BUTTONS at the same time. Screen will say “hold to change power”. Hold until it changes to show set wattage and then use UP or DOWN button to change maximum wattage applied during Temperature control.

STEALH VAPE MODE: Basically a blank screen that will only show LOCK and ERROR messages. Put mod in DEVICE LOCKED MODE (5 clicks of fire button). Hold FIRE and DOWN BUTTONS screen will rotate between Normal and Stealth mode. Let buttons go when it shows the one you want to select.

While in normal operating mode and not locked. Holding both DOWN and UP BUTTONS will lock the Temperature set if you are in TC MODE or the Wattage used if you are in WATTAGE MODE.

These settings are stored in FLASH RAM on the device and replacing batteries will not change them. They will stay the same when changing batteries.


A few things to consider if you want to use Temperature Control. TC can only be used with Titanium, SS or Nickel coils. Do not use Nickel or Titanium coils in WATTAGE MODE. SS can be used in either WATTAGE or TC modes. Best to use spaced coils, contact coils don’t work too well usually in TC. Best to set Maximum wattage for TC close to the max you would use for the coil in POWER mode. Make sure the initial ohm reading on the coil is taken at room temperature (around 70 F) or it won’t work correctly. Default temp on DNA is 450F but start off lower around 400 and work your way up until you are happy with it.

 

[Beamslider]

Same thing happened to me a couple days ago.
Was in VW, using a RTA w/kanthal.
Put it the side pocket car door, went shopping, came back took a vape...woh! that's hot.
It was in Ni mode. Thought maybe some buttons were pushed when I closed the door, but that would be a lot of buttons being pushed simultaneously. Wonder if it's a DNA75 bug?

The reason this happens is when you have Temperature locked in TC mode or WATTS locked in Power mode. Clicking either the UP or DOWN button twice will switch thru modes on the device. If you don't want it changing in your pocket you have to lock it with 5 clicks of the fire button. Then it is very unlikely to be able to happen as the buttons would have to be pushed together to change it.

In unlocked mode two rapid clicks on the up or down button will cycle thru modes. Bad design and doesn't seem to be documented as a way to change modes.

 

[Delilah718]

Hola & Happy Holidays to all, especially my itty bitty mod master @Katdarling

She shared the love and Santa (my hubby) heard all about it!

Thank you Katdarlingness, you've been 'Nice' & deserve
all the goodies 'Santa' can bring

 

[Katdarling]

am i safe lol?

If you're vaping, I'd say your about 95% safer.

Ho Ho Ho.

Hola & Happy Holidays to all, especially my itty bitty mod master @Katdarling

She shared the love and Santa (my hubby) heard all about it!

Thank you Katdarlingness, you've been 'Nice' & deserve
all the goodies 'Santa' can bring

Delightful, you, and gorgeous Santa gift!!! Congrats, honey pie. You KNOW I'm a huge fan of this amazing device. Great pic, too!!!!

I've been NICE? OH NO! I best be working on my NAUGHTY a bit more, eh?

 

[Ladiekali]

Yep i had to break out the instruction book with a flashlight because every one was asleep.
finally figured it out.

now i'm really curious about temp control.
doesn't seem too difficult.

seems like the end of my hit is pretty hot.. so maybe temp control would help me take a deeper hit.
not sure how i feel about that though. i messed with it a little bit. had the temp down to 300 and it was still too hot

 

[Beamslider]

300F or 300C? If you are getting hot vape at 300F then the ohm reading is most likely off. If 300C then it would definitely be hot vape. In the MOD you can change from C to F display by going below 200C with the down button, it will flip to F display. A correct room temp reading of OHM in very important for starting off with the coil first time it put on mod.

You can make a lot of other adjustments including uploading material spec by using Escribe software. With the software you can also change the default 10 degree step setting to 1 degree steps.

 

[Fredman1]

I've got a 316L coil in. 1.1Ohm. When I set it to TC st st, I set the temp to 200C and the ramp watts to 20W. When I fire it, it goes down gradually to 2.8W (and stays there) while the "temp protected" flashes. I'm not very familiar with TC so don't really know what to expect, but what I do know is its way to mild at that watts. Is it something i'm doing wrong or neglecting to do, cause it sure makes for a very boring vape...?

 

[Beamslider]

Temp protect means it is kicking in to lower wattage to control the temp. You can try upping the temp allowed or lowering the maximum wattage. The 20W is what it is using to ramp up then the mod cuts it to try and maintain temp. This can end up with it cutting it to low or no watt then ramping up wattage again and them recutting. Result is a not so good vape in that case.

Is that a contact coil? Spaced coils work much better than contact coils in TC. Contact/Micro coils just don't seem to work well if at all in TC.

 

[ShowerHead]

I've got a 316L coil in. 1.1Ohm. When I set it to TC st st, I set the temp to 200C and the ramp watts to 20W. When I fire it, it goes down gradually to 2.8W (and stays there) while the "temp protected" flashes. I'm not very familiar with TC so don't really know what to expect, but what I do know is its way to mild at that watts. Is it something i'm doing wrong or neglecting to do, cause it sure makes for a very boring vape...?

I'd suggest a slightly lower ohm build for TC, but at 20W, yours ought to fire ok.
So, if you have a long enough USB cable, you can leave it attached to your computer and use the device monitor to see what happens when you vape.
What I do with a new build (which has been awhile) is to set the mod as I think it should be. Punch (preheat) wattage, desired temp, make sure I have the right metal selected in the profile. Then start the device monitor and take a hit. I want to see the temperature line on the graph hit the set temp FAST, like under a second fast. I also want to see the wattage drop as it doesn't need to stay higher after temp is hit. The temp line should be almost flat for the entire hit if everything is right.
Sometimes I drop the wattage as it is clear the wattage isn't needed to get to temp. Sometime I raise it.
Very rarely when I started with DNAs, I'd have to rethink my build, usually because I had screwed it up in some manner.
Now, I don't ever even need to adjust anything, I use SS430 @ 430F, and vape happily.
Stick with it, you'll enjoy it once you get it dialed in.

 

[Fredman1]

So I now built a 2.5mm spaced 316L at .84ohm.
Set it to St St and the ramp to 15W. Temp is 200C. I used two different Jac mods.
No 1... When fired, the temp drops down to as low as 42 then quickly stabilize at 194. The watts stays at 15. Enjoyable vape. Is this what TC should feel like? Kinda like it. Battery flat so I take it out...oh no the magnet came loose..glued it back and replace with a new one. All psyched up I fired it again...watts drops down to 3.5 and temp protect flashes...boring vape....back to the same problem.
I then changed it to Jac mod no 2...same settings.
Same happens as with no one... when fired the watts drops down to 3.0, temp stays at 200 and temp protect flashes...very boring vape...
I set it to ordinary watts mode setting and it vapes like a champ...
Very frustrating to say the least.

 

[Katdarling]

watts mode setting and it vapes like a champ...

Did I understand correctly? You put it in wattage mode and it vapes like a champ?


IF so......

 

[Fredman1]

Yeah in power mode I feel like a champ...in TC more like a loser
Confusing bit is, for a while it worked lovely...then it changed its mind. Starting to wonder if I perhaps have female mods...

 

[Dubminer]

So I now built a 2.5mm spaced 316L at .84ohm.
Set it to St St and the ramp to 15W. Temp is 200C. I used two different Jac mods.
No 1... When fired, the temp drops down to as low as 42 then quickly stabilize at 194. The watts stays at 15. Enjoyable vape. Is this what TC should feel like? Kinda like it. Battery flat so I take it out...oh no the magnet came loose..glued it back and replace with a new one. All psyched up I fired it again...watts drops down to 3.5 and temp protect flashes...boring vape....back to the same problem.
I then changed it to Jac mod no 2...same settings.
Same happens as with no one... when fired the watts drops down to 3.0, temp stays at 200 and temp protect flashes...very boring vape...
I set it to ordinary watts mode setting and it vapes like a champ...
Very frustrating to say the least.

Try keeping the temp the same but set the ramp up to 25-30 and see if you notice an improvement.