The Datron 1061 is a microprocessor controlled Autocal Digital Voltmeter, a precision measuring instrument featuring high stability and systems capability. The basic instrument provides full DC measurement capability, computation facilities, self check routines and calibration memory. The AUTOCAL 1061 instrument combines high accuracy with short measurement time to maximize usability. A 5-1/2 digit display provides a resolution of one microvolt and accuracy of 5 ppm. In addition to the basic DC voltage measurement function, the instrument performance can be expanded, by the selection of options, to provide further measurements: DC current Resistance True RMS AC voltage True RMS AC current DC coupled true RMS AC voltage DC coupled true RMS AC current Ratio