Section R. 460.3704 - Voltage measurements; required equipment; periodic checks; certificate or calibration card for standardsRule 704.
(1) An electric utility or cooperative shall have access to at least 1 indicating voltmeter that has a stated accuracy within 0.25% of full scale. The instrument must be maintained within its stated accuracy.(2) Each electric utility or cooperative shall have not less than 2 indicating voltmeters that have a stated accuracy within 1% of full scale.(3) Each electric utility or cooperative shall have not less than 2 portable recording voltmeters, or their electronic equivalent, with a stated accuracy within 1.5% of full scale.(4) Standards must be checked pursuant to R 460.3612.(5) Working instruments must be checked pursuant to R 460.3610.(6) Each standard must be accompanied at all times by a certificate or calibration card, duly signed and dated, on which the corrections required to compensate for errors found at the customary test points at the time of the last test are recorded.Mich. Admin. Code R. 460.3704
1983 AACS; 1996 AACS; 2023 MR 7, Eff. 4/10/2023