931B Fluke Meter
The 931B is a used meter from Fluke. A meter is an instrument used to test and measure alternating current (AC) or direct current (DC) voltage, resistance, RF, electric current, and much more.
The Fluke 931B, True RMS Differential Voltmeter, that is designed for rapid measurements of AC waveforms regardless of their shape. Accuracies to ±0.05% of reading are obtained in a simple-to-operate portable instrument with a five digit readout and automatic indicating decimal point.
The instrument employs the principle of the differential thermocouple transfer standard to obtain its high degree of accuracy. The Fluke 931B, True RMS Differential Voltmeter, incorporates unique solid-state circuitry to accomplish the transfer automatically and almost instantly as the voltage readout dials are adjusted to their proper setting.