Wattmeter calibration – oh so easy!
Multifunction calibrators of the 1970s and 1980s could provide, in a single enclosure, direct voltage, alternating voltage, resistance, direct current, and alternating current for the calibration of digital multimeters. In the 1990s, Multiproduct calibrators were introduced with the goal of supporting the calibration needs of a wide range of workload including Digital Multimeters (DMM), thermocouple thermometers, Resistance Temperature Detector (RTD) thermometers, capacitance meters, chart recorders, oscilloscopes, and wattmeters. This article describes some of the features incorporated in a new calibrator to make wattmeter calibration even easier and more accurate.
- In the 1970s and 1980s, calibration standards known as Multifunction Calibrators began to replace instruments that could provide calibrations for only one or two electrical quantities.
- In the 1990s, Multi-Product Calibrators were introduced but even though they could source voltage or current, they were not capable of providing basic power calibration signals simultaneously.
- Modern instruments enable accurate and simple power calibration, even in three phase systems.
Power calibration – becoming easier
By D Deaver, Fluke Corporation
Electricity+Control October 2012 (pages 4 – 6)