# PSC 134.25 General use of calorimeter equipment.

**Citation:** Wis. Admin. Code § PSC 134.25  
**Type / status:** regulation / current  
**Agency:** Public Service Commission of Wisconsin  
**Effective:** 1965-02-01  
**Published:** Not stated

Complete current PSC 134.25 from official Wisconsin Legislature sources (gas-utility-service).

## Document text

PSC 134.25 General use of calorimeter equipment.

(1) Unless specifically directed otherwise a calorimeter shall be maintained at each gas producing or mixing plant whether the plant is in continuous operation or used only for standby or peak shaving purposes. The calorimeter shall be used to check the operation of the plant and shall measure the heating value of the gas going to the gas lines.

(2) Unless specifically directed otherwise calorimeters shall be maintained in operation in locations where the heating value of the gas can be measured from each different supplier.

(3) Unless specifically directed otherwise a calorimeter shall be maintained and used to measure the heating value of the gas actually sold to customers in those cases where mixed gases are used.

(4) Tests of heating value of the gas shall be made daily whenever gas is supplied at the calorimeter location unless specifically directed otherwise by the commission. The original records of the tests shall be dated, labeled and kept on file for 6 years. A copy of the daily average heating value of gas sold to customers shall be sent to the commission each calendar month.

(5) The calorimeter equipment shall be maintained so as to give results within + or - 1%. Recording calorimeters used to test or control the production or mixing of gas or measure the heating value of purchased gas when therm rates are not applicable shall be tested with a gas of known heating value at least 3 times a year or when the accuracy is in question. Recording calorimeters used only with standby or peak shaving production plants shall be tested with a gas of known heating value at least 2 times a year. Non-recording calorimeter equipment such as the Junkers shall be tested with a gas of known heating value at least once a year or tested against another calorimeter of known accuracy at least once a year.

## Provenance

- Official: Yes
- Source: <https://docs.legis.wisconsin.gov/document/administrativecode/PSC%20134.25>
- Source ID: `wi-legislature-pipeline-corpus`
- SHA-256: `b57cafbe913f6d8a9b0b986711226726753669774c20fdaa702bf32f5f8289a2`
- Retrieved: 2026-08-12T06:25:04.554Z
- Exported: 2026-08-22T21:23:28.488Z
- Document slug: `wi-psc-134-25`

### Source metadata

```json
{
  "jurisdiction": "US-WI",
  "code": "Wisconsin Administrative Code",
  "chapter": "PSC 134",
  "section": "PSC 134.25",
  "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, February, 1959, No. 38, eff. 3-1-59; am. (5), Register, January, 1965, No. 109, eff. 2-1-65.",
  "references": [
    {
      "citation": "Register, February, 1959, No. 38",
      "referenceType": "administrative-register",
      "url": "https://docs.legis.wisconsin.gov/document/register/38/B/toc",
      "linkBasis": "official-publisher-supplied exact-citation link"
    },
    {
      "citation": "Register, January, 1965, No. 109",
      "referenceType": "administrative-register",
      "url": "https://docs.legis.wisconsin.gov/document/register/109/B/toc",
      "linkBasis": "official-publisher-supplied exact-citation link"
    }
  ],
  "sourceCollection": "wi-legislature-psc-code",
  "region": "WI"
}
```