Peter_Silie

Hi Bill, I found the SP33.2 INT when entering "apply sevice pack" available and installed it. My favorite theme seams to be working with it. THANK YOU, for the Information and prevent me struggling with that issue any further. Do you know what the official reason for this behavior is? I really want to ask the software developer that! But I would have some questions more ... 😉 Sincerely

Hello BillW50, 👍👍👍 thank you very much for that information! That's want I wanted to know. I'm going to change to SP33, actual running SP46. Interestingly this does not affect singel cell mods?! I am using DNA75c/100c in common, and did not see this behavoir. Did I understand that right, that this timer is independent from the 5clicks lock mode? There is also an auto-lock-mode timer, this is not that timer you mentioned, right? This seams to me to be a bug. Deep sleep mode should be entered immedeately after lock sequence. So far I was thinking it was so... The RIVA was the first DNA250c device, that I really wanted. I like devices like Thelema Solo and Odin Solo and not that box shaped style that dual cell mods usually have. The Riva is compromise I can make. Here in Germany they are selling it for 84 Euro, that's ok for an DNA250c, so I ordered one. AND: We are allways 6 Months behind the world 😉 I will try that SP33, i have it on my HD Sincerely

Hi dwcraig1, thank you for your answer 🙂 yes, these are four brand new molicel, that I bought for this device. And interchanging the batteries does not fix the problem, I also checked with older paired batteris as well. Your device consumes abot 2% a day, that is not what I am used to, but quite better than 5% within 24H. You should not expect that. I have devices sitting several weeks and they are still fine when I grab them... Sincerely

Hello Wayneo, thank you for your quick answer. We have a bank holliday in Germany today, so I finaly have time to come back here. I have observed the problem when the device is in Locked Mode with no attomizer attached, so it should be in sleep mode. In this mode should nothing more be active than the (useless) clock and the waiting for a button click and the BMS. The BQ76925 USB/BMS/charge controller has ultra power consumption, about 40µA and should not be responsible. Anyways, 5% power loss with 24Hours is not acceptable, I have never seen that on any other device not even on the cheapest one. but I have some news on that, on sunday when I started here, I also interchanged the two PCBs with each other. That means: My better working tinker board moved inside the Riva and Riva board into my test setup for better access. And now - guess what!? The problem is still inside the Riva. Since the case is not connected anywhere and the wiring is double-tripple checked and rebuild as well, there is only one thing left: that's the display. Now I'm going to get this out (of it's frame) as well and on my table, that I can get a closer view on that, too. Maybe there was a firmware change in the display controller, somehow the DNA does not interact propperly with it anymore... We'll see, I will report Sincerely

Hello, I can use a little help on a problem with a brand new Dovpo Riva DNA250c. After a few days I noticed that the batteries dischange without any use. Scenario: Brand new batteries (true) fully charged, device in Lock-Screen, just standig nothing done with, not even being moved. After 24 hours 5% battery power lost. I contacted the seller and described the problem. I was offered a check and an exchange in case of a defect. After a few days, the dealer stated that there was nothing wrong with the device and that it behaves the same way as the others on the shelf. The device was sent back. Of course, I can't leave it like that. So I did a test setup with a loose DNA250c board I had lying around to see if it would behave the same way. Of course it didn't. The test setup uses only 1% battery charge per day. That's not what I expected, because that's still much more than I'm used to from DNA75c/DNA100c, but still much less than the Riva. Does anybody have similar experiences on that? I would appreciate any hint on how to solve that. Thanks in advance

sorry, why do you feel that? I just tried to explain where most problems come from. A good working TC would be so important for new users because it prevent them from vaping too hot or too cold and to aviod dry hits as well. There are several reasons why we want to have good TC and should have it set up right. We need good coil materials that lets you make your coil like "10 wraps on 3,5mm, TCR400, 220degC, ready" and that leads to the same result all over the world. Under the Maple tree with a light breeze from west as good as during winter time. Before we lean back and state: " I don't care, I use Replay..." , we should ask why they sell us that poor SSL stuff only.

PS: I forgot to say: Replay is quiet fine, but does not solve the problem. The result (and inaccuracy) is affected by the same resolution limit of resistance measuring. Indeed it's a blessing to aviod messing arround with cold resistance and TCR values and so on. But it may keep us away from understanding how it works. Replay is NOT the solution.

@gwyarThank you for your answer. Let's take a closer look. Sorry but that is not true. The TCR is a constant that depents on the material, and decribes how much the resistance of the material changes when it is heated. That does NOT depend on the shape of the material neither on the location. It is always the the same under a maple or beneeth an oak and even on mars. As wayneo said: steam-engine 'wire wizard' gives a good overview, any physicist table book will give the same information. Your expectations on using TC are exacly the same as mine. The problems that you achive are the same as mine, too. The reason for that is, that we don't have the right material for a proper TC setup. We should have more wire material like titanium. The reason for most problems that we have with TC is, that we don't have much choices on the material. In most cases we use SSL316 or similar, right? I try to explain: SSL has a TCR about 80, very low. Even though the DNA has a very presice measuring circuit, the resolution of that is NOT infinite. When looking to your cold resistance adjustment, you see that the smallest value, you can set is 0,001Ohm. That's the border of the resolution. (simplified) I made the picture to show what happens when you apply the same resolution (deltaR) to different TCR. You can see, that on low TCR, the deltaT value increases, that means when the controller calculates the value, a huge range of temperatures match to the same resistance (simplified again) The red graph represents materials like SLL316, the blue graph is for something like titanium or nickel. It is schematic and not symmetic, but you will get the idea...

that is why I want to change the Firmware 😄 Replay is for housewifes - Sorry I'm just kidding 🤣 There is often a missunderstanding in the difference beween TFR und TCR. The DNA does only work with TFR that consits of (almost) 6 TCRs. The TFR is a value table that should help the controller to calculate the temperature of materials that temperature-resistance-relation is a non-linear function. We would come to much more repeatable and precise results if we had more materials with the properties of Titanium (or similar) with a serios TCR about 300-400 Only one single TCR would do the job more precise and the calculation would be easier and faster, too.

The REPLAY function is quite nice, but I'm sorry to say: It's just another workaround. The reason for questionable results in TC mode is caused by the poor wire material that we are provided with. Lets see what we have: SS316, Titanium, Nickel and some materials with more or less similar properties. Nickel: way too low resistance but very good TCR Titanium: good TCR but get's brittal when heated to much and hard to find. SSL316: good material but very low TCR Kanthal, Ni80 and friends: Zero TCR, not any TC capability. The most popular TC material that is available is just SSL316. And you are completely right, the results are questionable. You will get a better or even similar control of the output power when simple using the power mode. I can say from my experience: TCR below 200 will lead into results that you call weather report and you are right. So we need better wire materials and that's what I'm working on.

@BillW50 thank you for your agreement . And yes, as I just said: I'm aware of this workaround, that results to just another fixed wire profile with a linear relation, then.

Hello, Did anybody ask for a plain TCR mode that allows to freely set a value? I mean: to set a TCR value within the device and use it as a special mode. I know that I can create a TFR in Escribe with one value only, using the value "actions edit thing". That's not what I want, because that value is nailed down to that Value and cannot be changed without using the computer again. Background: I am working on the creation of clapton style wires that provide a better TC ability than common wires actually have.