Lets say this is an accuracy specification: ±1.0% ±2.0V and I am measuring exactly 100V, but I don't know that.
So "±1.0%" part means that voltage on the DMM is going to read anywhere between 100 ±1.0% or something between 99 and 101V.
What I do not understand is "±2.0V" part. Does it mean that I need to add it to the above 99-101V range, so I'll get actual 97-103V reading?