Definitely, but you will need to use some software such as HCFR, CalMAN, or maybe even the software that comes with the meter.Or could I use one of the meters I used with AutoCal?
215 nits on a 135” screen seems too high to be correct, unless the screen gain is very high. By my calculation, 20.5 fc = 220 lux, which gives 71 nits on a 1.0 gain screen. EDIT: some online calculators seem to be providing inconsistent conversion formulas. Great comment. I have asked a few...