The EMCO Model V-20 a high quality, 31 range multimeter, provided with a 50 microampere, D’Arsonval meter movement to give a sensitivity of 20,000 ohms per volt on DC and 1000 ohms per volt on AC. This high sensitivity results in light loading and, therefore, minimum disturbance in the circuit under test, an indispensable feature for accurate measurement. The quality of this instrument is further exemplified by the inclusion of wire-wound potentiometers (shunting and in series with the rectifier), which are factory adjusted to compensate for the individual characteristics of the rectifier in your instrument. This built-in EMCO feature assures you of standardized accuracy over a wide range of measurements. This instrument provides AC and DC voltage measurement from .1 volt (on the 2.5 volt scale) to 5000 volts (an internal high voltage multiplier is included). It also provides DC current measurement from 1 microampere (on the 50 microampere scale) to 10 amperes. Resistance ranges to 20 megohms, output, and decibel ranges bring the total number of useful ranges to 31. An added feature of this instrument is an internal blocking capacitor that can be switched when it is desired to measure the output signal voltage in circuits where DC is present.