Fluke 540B

The Fluke 540B is a used Thermal Transfer Standard.    *  Voltage transfers may be made from 0.25 to 1000V rms in 14 ranges with a frequency range from 5Hz to 1MHz and a basic accuracy of 0.01%.Other Info:The Fluke 540B, Thermal Transfer Standard, that is a thermal instrument for precise measurement and calibration of AC voltage and current. The Fluke 540B, Thermal Transfer Standard, is designed for simple operation with positive protectection from overloads.

Fluke 540B datasheet & specifications