Calibration techniques for AC voltage meters

These devices are calibrated directly from a calibrated voltage generator. These standards, whose ratings generally range from a few millivolts to 1,100 V, generally have one-year specifications of less than a few 10 ^-4 up to 100 kHz, and a few 10 ^-3 up to 1 MHz (for the 1,100 V rating, an amplifier is associated with it in certain frequency ranges). The following models are commonly found in metrology laboratories: Fluke 5720A, Fluke 5700A, Fluke 5500, Datron 9100...

The voltage from the generator is adjusted to bring the voltmeter pointer to the division to be calibrated. The use of a magnifying glass is recommended for this work;...