Lops

So how long does it take your mod to guesstimate a stable room temperature? And how is the behavior after firing? I mean, once you fire your mod, the measured board temp goes up (which is perfectly fine) and evaluation of room temp stops (which is reasonable as the board temp is now somewhat independent from the room temp). After a certain time not firing, the evaluation of room temp restarts as the mod assumes the board temp has cooled down enough and board temp is now fully dependent on the temperature of the air around it. Which room temp does your mod show at this point in time? And how long does it take to settle in to correct room temp? Maybe a screenshot of the device monitor would be helpful. Best wishes to you and mackman, keep it up! Greetz, el Lopso

Yes I did set it to zero before testing. Does that mean that you found other sources regarding the internal resistance of the finder 250c?

I just took measured mine by shorting the 510 using a rta base and a low resistance wire (no regular coil wire ofc). It came out at 0.010 Ohms. Should be a reasonable estimate for it's internal resistance and also seems in line with quite a couple of other dna 250c mods.