Abstract :
This paper deals with an optical method applied to watthour meter testing. The method as presented overcomes, to a great extent, personal error, and lessens the time required through the use of measured light impulses. It gives instantaneous comparison between watt-seconds on two measuring devices. The objects of this method are: First: To reduce the time of laboratory tests, acceptance tests, and re-calibration. Second: To reduce personal error, and to increase the accuracy of the test. Third: To provide a device that gives precision instrument accuracy. Fourth: To make time devices in precision tests unnecessary.
