Quote Originally Posted by Sunnieskys View Post
Digital probe is sitting on top of the glass correct and then you point the laser at the glass and it is reading 89? I would say your heat gun is correct.
temp gun keeps moving around too lol but not wide range, like I said, within 3 seconds, temp reads 89~93 degrees. Since I am opening the lid and letting the air in, it might have cool down the spot a bit, or does it not take that short to lose hot spot heat? If that is the case, hot spot might be hotter? I don't know if I am doing it right.
So basically what I am doing is, open the lid on the tub, taking out the substrate, moving tub little away from heat tape then measure it with heat gun and get 89~93 Is this the right way? could it be actually higher but lowered because I opened the lid?