Ohms per volt is a figure of merit for moving coil voltmeters. The number is dominated by the resistance of the moving coil; that is the input resistance on the most sensitive scale divided by the full scale voltage. Resistive dividers are then used for less sensitive scales, and the ohms per volt value is retained for higher voltage scales so long as the scaling is done with a simple series resistance.?
When basic electronic analog volt meters came along, the input resistance tended to be the same on all voltage scales and that figure of merit was no longer significant. That is also true of modern DVMs.
Jim Wagner
