3.—(1) Apparatus used for determining the errors of repaired meters during these tests shall comply with the directions.
(2) 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.
(3) For any test load, the load applied to a working standard integrating meter shall not be less that 25% or more than 125% of its full load rating.
(4) 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.