§ 57.25. Facilities for testing meters and instruments.
(a) Adequate testing facilities. A public utility shall provide for, and have available, suitable and adequate facilities for testing its meters. Public utilities not maintaining standardizing laboratories may, upon permission from the Commission, have their meters and instruments certified by a standardizing laboratory approved by the Commission.
(b) Periodic tests of reference standards. The watthour meter reference standard for the public utility and shall be periodically tested for accuracy and adjusted if necessary by a representative of the Commission at a place the Commission may direct. Immediately after making final adjustment, the tester shall seal and date tag the reference standard and shall furnish the public utility with a correction curve properly dated and signed.
(c) Periodic tests of watthour standards. The portable watthour standards, together with other measuring equipment the Commission may require, shall also be tested and adjusted periodically by a representative of the Commission if necessary as the Commission may direct. The tester shall furnish the public utility with a correction curve properly dated and signed.
(d) Frequency of portable watthour standard check tests. During the interval between tests by the Commission, the portable watthour standards shall be compared with the reference standard at least every month for induction type meters, and every 3 months for the solid state meter standards. The calibration obtained shall be used in determining the accuracy of the service meters. If a portable standard is subject to either a mechanical or electrical shock, it shall be tested before being used.
(e) Records of check tests and correction curves. A record of check tests shall be kept showing the condition and accuracy of the watthour standard before and after testing, indicated by the words ‘‘as found’’ and ‘‘as left,’’ in form and detail to permit convenient checking of the methods and results. A complete record of the check tests and correction curves furnished by the Commission shall be preserved for 5 years.
(f) Fees for testing appliances of public utilities. The Commission will charge and collect from public utilities, for the testing of their instruments of precision and measuring apparatus, fees according to the following schedule:
Service (per each item) Amount
(in dollars)Watt-hour standard: 1. Initial 10 determinations of percentage registration of one standard at 60 Hz 75 2. Each additional determination of the same standard 10 Indicating instruments: AC/DC wattmeters, AC resistors, calibrators, ammeters and voltmeters 50 Instrument transformers: 1. Voltage transformers— a. Ratio and phase angle, at 60 Hz on 1 range, 1 secondary voltage, 1 burden primary VL50KV 50 b. Each additional burden, range or secondary voltage 10 2. Current transformers, ration and phase angle— a. 1 range, 1 frequency, 1 burden, secondary currents 0.5, 1, 2, 3, 4, 5 A at primary current not over 5000 A 50 b. Each additional secondary current or combination of range, frequency and burden 10 Standard Cell Calibrations (each) 25 Potentiometers (each) 250
Authority The provisions of this § 57.25 issued under the Public Utility Code, 66 Pa.C.S. § § 331, 501, 504 and 1501; amended under the Public Utility Code, 66 Pa.C.S. § § 501, 1501 and 1504.
Source The provisions of this § 57.25 adopted February 25, 1946; amended through May 29, 1973; amended January 7, 1983, effective January 8, 1983, 13 Pa.B. 131; amended August 7, 1987, effective August 8, 1987, 17 Pa.B. 3324. Immediately preceding text appears at serial pages (80600) to (80601).
Cross References This section cited in 52 Pa. Code § 57.254 (relating to advanced meter standards).
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