# PSC 134.291 Statistical sample testing plan for new meters.

**Citation:** Wis. Admin. Code § PSC 134.291  
**Type / status:** regulation / current  
**Agency:** Public Service Commission of Wisconsin  
**Effective:** 1989-12-01  
**Published:** Not stated

Complete current PSC 134.291 from official Wisconsin Legislature sources (gas-utility-service).

## Document text

PSC 134.291 Statistical sample testing plan for new meters. The following new meter sample testing plan may be used for testing new meters instead of the new meter test requirements of s. PSC 134.26 (1), if the commission authorizes the adoption of the plan by a utility.

(1) Meters, as received from the manufacturer, shall be divided into homogeneous lots by manufacturers and types. 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 on 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.

(2) The test criterion for acceptance or rejection of each lot shall be based on a separate analysis conducted at both the open and check flow rate, as specified in s. PSC 134.28 (1) by means of the Standard Deviation Method, Double Specification Limit and with an Acceptable Quality Level (AQL) of.25 for the open accuracy analysis and an AQL of.40 for the check accuracy analysis as shown in Table B-3, MIL-STD-414, page 45. The statistical analysis calculations shall be made following the example on page 43 of MIL-STD-414 with the upper and lower specification limits U and L designated at 101% and 99% respectively.

(3) One nonregistering 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 is found not to be registering, the entire lot shall be rejected.

(4) A lot shall be deemed acceptable for installation if the total estimated percent defective (P) is less than the appropriate maximum allowable percent defective (M) as determined from Table B-3 under the procedures of sub. (2). All meters in an acceptable lot shall be deemed to have met the accuracy requirements of s. PSC 134.26 (1) for placement in service without further testing.

(5) A lot shall be considered rejected and not acceptable for installation if the total estimated percent defective (P) exceeds the appropriate maximum allowable percent defective (M) as determined from Table B-3 under the procedures of sub. (2). All meters in a rejected lot shall be tested and adjusted in accordance with the procedures of s. PSC 134.27 or replaced with meters meeting these requirements.

Note: Military Standard 414 is on file at offices of the Public Service Commission, Secretary of State and Legislative Reference Bureau offices.

## Provenance

- Official: Yes
- Source: <https://docs.legis.wisconsin.gov/document/administrativecode/PSC%20134.291>
- Source ID: `wi-legislature-pipeline-corpus`
- SHA-256: `46f3541a8584302371c9ad71efa420280e428f585ebc277b94d3ad005d5abdb0`
- Retrieved: 2026-08-12T06:25:04.554Z
- Exported: 2026-08-23T17:39:42.377Z
- Document slug: `wi-psc-134-291`

### Source metadata

```json
{
  "jurisdiction": "US-WI",
  "code": "Wisconsin Administrative Code",
  "chapter": "PSC 134",
  "section": "PSC 134.291",
  "category": "gas-utility-service",
  "currentThrough": "2026-08-01",
  "currentnessBasis": "Official publisher states the entire administrative code is current and updated on the first day of each month.",
  "legalScope": "This completeness-verified corpus contains every current section of Wisconsin Administrative Code Chapters PSC 133, 134, and 135, plus complete Wis. Stat. §§ 196.745 and 182.0175. Chapter PSC 135 is the dedicated gas-safety chapter. Chapters PSC 133 and 134 are included because the Wisconsin PSC identifies all three chapters as requirements used in pipeline-safety inspections; they also contain broader construction, siting, utility-service, billing, metering, and customer provisions.",
  "applicabilityCaveat": "Applicability depends on Wisconsin PSC jurisdiction, operator and facility type, intrastate or interstate status, gas-public-utility status, project thresholds, activity, exemptions, waivers, Commission orders, federal preemption, and the specific provision. Wis. Stat. § 196.745 excludes propane distribution systems from the PSC pipeline-safety program, while the one-call law reaches transmission facilities beyond natural-gas pipelines.",
  "incorporationCaveat": "Chapter PSC 135 adopts and supplements federal minimum pipeline-safety standards, principally 49 CFR Parts 191, 192, 193, and 199. The source also cites statutes, administrative rules, Commission forms and orders, and private technical standards. References are retained as metadata; incorporated material is not reproduced and its edition, legal effect, and licensing must be verified at the referenced source.",
  "rightsCaveat": "Official Wisconsin Legislature and Public Service Commission text is preserved with attribution and source hashes. Public availability does not establish a blanket license for site presentation, agency marks, annotations, forms, or incorporated federal and privately authored standards; downstream redistribution requires separate rights review.",
  "history": "History: Cr. Register, November, 1989, No. 407, eff. 12-1-89.",
  "references": [
    {
      "citation": "PSC 134.26(1)",
      "referenceType": "wisconsin-administrative-code",
      "url": "https://docs.legis.wisconsin.gov/document/administrativecode/PSC%20134.26(1)",
      "linkBasis": "official-publisher-supplied exact-citation link"
    },
    {
      "citation": "PSC 134.28(1)",
      "referenceType": "wisconsin-administrative-code",
      "url": "https://docs.legis.wisconsin.gov/document/administrativecode/PSC%20134.28(1)",
      "linkBasis": "official-publisher-supplied exact-citation link"
    },
    {
      "citation": "PSC 134.291(2)",
      "referenceType": "wisconsin-administrative-code",
      "url": "https://docs.legis.wisconsin.gov/document/administrativecode/PSC%20134.291(2)",
      "linkBasis": "official-publisher-supplied exact-citation link"
    },
    {
      "citation": "PSC 134.27",
      "referenceType": "wisconsin-administrative-code",
      "url": "https://docs.legis.wisconsin.gov/document/administrativecode/PSC%20134.27",
      "linkBasis": "official-publisher-supplied exact-citation link"
    },
    {
      "citation": "Register, November, 1989, No. 407",
      "referenceType": "administrative-register",
      "url": "https://docs.legis.wisconsin.gov/document/register/407/B/toc",
      "linkBasis": "official-publisher-supplied exact-citation link"
    }
  ],
  "sourceCollection": "wi-legislature-psc-code",
  "region": "WI"
}
```