100mV to 500V, 100µA to 1A 5Ω to 10MΩ antiquated
WESTON MODEL 80 ANALYZER (MULTIMETER) were built in the 1950s and called analyzers at that time. Now they are known as multimeters. The D'Arsonval/Weston meter is positioned vertically instead of laying flat horizontally to exemplify their design. Weston created the D'Arsonval movement which used a fine metal spring to give proportional measurement and a built-in permanent field magnets made deflection independent of the position of the meter. These features enabled dispensing with wheatstone bridges, and made measurement quick and easy. By adding a series or shunt resistor, more than one range of voltage or current could be measured with one movement.