The Dana Model 5524 Digital Voltmeter is a multiple-function instrument capable of measuring dc voltage (filtered or unfiltered), dc/dc ratios, dc voltage in millivolts, resistance in kilohms and ac voltage. The output is displayed on a five digit visual readout with a sixth "overrange" digit that extends each range by 10% (99999 to 109999). An optional Remote Program Accessory enables the function, range, and read commands to be made externally. In addition, an optional Electrical Output Accessory provides an isolated binary-coded decimal (BCD) output for driving a printer or other recording device. A sealed case enables the instrument to withstand severe environmental conditions (see "Specifications", 1.13).