Paragraph 3 Accuracy tests

Apparatus used for determining the errors of meters during these tests shall comply with the directions.

The rate of advance of a meter over a test period shall be obtained by reading the electro-mechanical register or electronic display on or connected to meters or by monitoring the rotation of a disc or pulse output of a meter.

For any test load, the load applied to a rotating integrating working standard meter shall not be less than 25% or more than 125% of its full load rating.

For a working standard wattmeter, the applied load shall not be less than 40% or more than 100% of its full scale or range reading.