The 1864 Megommeter is the choice for more demanding applications. It is the more flexible of the two instruments. The test voltage can be set to any value from 10 VDC to 109 VDC in one-volt steps and to 1090 VDC in 10 volt steps. Thus the 1864 can be set to any common, or uncommon test votage for ceramic, mica or paper capacitors, or other devices. The reverse resistance of rectifiers can be readily measured; the low test voltages are especially useful in measuring solid state diodes.