Kingblah

Hi all, I upgraded to a DNA 75c mod from a cheap innokin coolfire and I'm a bit baffled at the settings for my Ni200 coil which, of course I run in TC mode. The vapes I'm getting with the following settings feel really weak and comparatively smaller cloud compared to my old mod: punch: 5 preheat: on Power: 60w, temp: 242C Firstly what's the difference between Preheat wattage which I saw in escribe, and the main wattage on the main display? Does anyone have any recommended settings for vaping with Ni200? secondly, when I go into diagnostics, I get readings of 0 for Amps, Volts and Ohms - is this normal? Thanks!