Calibrating electrical analysis equipment

Calibrating electrical analysis equipment

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Credit: ANDREW BROOKES, NATIONAL PHYSICAL LABORATORY/SCIENCE PHOTO LIBRARY

Caption: Calibrating electrical analysis equipment. Screen showing data from a harmonics and flicker analysis machine. Harmonics are the electric voltages and currents that emerge in the electric power system in response to electric loads. Flicker is the increase and decrease in voltages caused by changes in electric loads. In lamps, flicker is seen as a brightening and dimming of the bulb. Photographed at the National Physical Laboratory, in Teddington, UK.

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