PSC 113.0919(1)(a)7.7. A statement of “as left” accuracies, when applicable.
PSC 113.0919(1)(a)8.8. The name of the person making the test.
PSC 113.0919(1)(a)9.9. The readings before and after the test.
PSC 113.0919(1)(a)10.10. A statement as to whether or not the unit of metering equipment “creeps” and in case of creeping, all of the following:
PSC 113.0919(1)(a)10.a.a. The rate.
PSC 113.0919(1)(a)10.b.b. A statement of “as found” and “as left” accuracies sufficiently complete to permit checking of the calculations employed.
PSC 113.0919(1)(a)10.c.c. Indications showing that all required checks have been made.
PSC 113.0919(1)(a)10.d.d. A statement of repairs made by the utility, if any, or a notation that the unit was returned to the manufacturer for repairs.
PSC 113.0919(1)(a)10.e.e. Identification of the testing standard.
PSC 113.0919(1)(b)(b) Meter test records and meter history records may be kept as separate records or one record.
PSC 113.0919 NoteNote: Meter test records need not be separately retained from meter history records provided that the meter test records are incorporated into the meter history records.
PSC 113.0919(2)(2)Meter history records.
PSC 113.0919(2)(a)(a) Each utility shall keep a history record for each unit of metering equipment showing all of the following:
PSC 113.0919(2)(a)1.1. The date the unit was purchased.
PSC 113.0919(2)(a)2.2. The unit’s cost.
PSC 113.0919(2)(a)3.3. Information identifying the unit.
PSC 113.0919(2)(a)4.4. Equipment associated with the unit.
PSC 113.0919(2)(a)5.5. The unit’s essential name-plate data.
PSC 113.0919(2)(a)6.6. Dates of the last 2 tests.
PSC 113.0919(2)(a)7.7. Results of the last “as found” and “as left” tests, unless separate records are kept of each test for each unit.
PSC 113.0919(2)(a)8.8. Locations where the unit has been installed, with dates of installation and removal.
PSC 113.0919(2)(b)(b) Meter test records and meter history records may be kept as separate records or one record.
PSC 113.0919(3)(3)Statistical sampling summaries. Each utility authorized to test meters under the statistical sample testing plan of s. PSC 113.0921 shall submit to the commission, by April 15 of the following year, a summary of the statistical sample testing results for the prior calendar year. The summary shall include group and lot numbers; a description of meters in each lot; the number or meters in each lot; the number of meters sample tested in each lot; full load sample mean accuracy (x), estimated standard deviation (s) and total estimated percent defective (P); light load sample mean accuracy x , estimated standard deviation (s) and total estimated percent defective (P); projected annual rates of change for x , s and P at both full and light load analysis points; lots requiring testing and actual x, s and P data from meters where entire lot tests were required under the program; group and lot numbers; a description of meters in each lot and the number of meters in each lot for the succeeding test year.
PSC 113.0919(4)(4)Computerized meter record system. Utilities with more than 5,000 metered customers shall acquire or develop a computerized meter records system and use it for maintaining all required meter equipment records, scheduling and implementing all required meter testing and analyzing meter accuracy performance. The reporting system and software must be acceptable to the commission.
PSC 113.0919 HistoryHistory: Cr. Register, July, 2000, No. 535, eff. 8-1-00; CR 13-033: r. and recr. (1), (2), cr. (3) (title), (4) (title) Register July 2015 No. 715, eff. 8-1-15.
PSC 113.0920PSC 113.0920Statistical sample testing plan for new self-contained single phase and 3-wire network meters. The new meter sample testing plan described in subs. (1) to (5) may be used for testing new self-contained, single phase and 3-wire network meters without mechanical demand registers or mechanical pulsing devices instead of the new meter test requirements of s. PSC 113.0911 (1) (a), if the commission authorizes the adoption of the plan by a utility.
PSC 113.0920(1)(1)Meters, as received from the manufacturer, shall be divided into homogeneous lots by manufacturers and type. The maximum number of meters in any lot may not exceed 1,000 or be less than 96. From each such lot assembled, there shall be drawn a coded sample size specified in Military Standard 414, (MIL-STD-414) dated 11 June 1957, as shown for the various group sizes using Inspection Level IV of Table A-2 on page 4 and a corresponding actual sample size as shown in Table B-3 on page 45. The sample shall be drawn by a random method that ensures that each meter in the lot has an equal chance of being selected.
PSC 113.0920(2)(2)The test criterion for acceptance or rejection of each lot shall be based on a separate analysis conducted at both the full load and light load test points at unity power factor, as specified in s. PSC 113.0811 (1) (c), by means of the Standard Deviation Method, Double Specification Limit and with an Acceptable Quality Level (AQL) of 0.25 for the full load accuracy analysis and an AQL of 0.40 for the light load accuracy analysis as shown in Table B-3, MIL-STD-414, page 45. The statistical analysis calculations shall be made following the example outlined on page 43 of MIL-STD-414 with the upper and lower specification limits U and L designated at 101% and 99% respectively.
PSC 113.0920(3)(3)One non-registering meter may be removed from the sample lot for analysis purposes and replaced with another randomly selected meter. If more than one meter in a sample lot is found not to be registering, the entire lot shall be rejected.