{"data":{"id":"us/43-cfr-3175.132","jurisdiction":"us","citation":"43 CFR 3175.132","heading":"Testing of reference accuracy.","body":"(a) The following reference test conditions must be maintained for the duration of the testing:\n(1) Ambient air temperature must be between 59 °F and 77 °F and must not vary over the duration of the test by more than ±2 °F;\n(2) Relative humidity must be between 45 percent and 75 percent and must not vary over the duration of the test by more than ±5 percent;\n(3) Atmospheric pressure must be between 12.46 psi and 15.36 psi and must not vary over the duration of the test by more than ±0.2 psi;\n(4) The transducer must be isolated from any externally induced vibrations;\n(5) The transducer must be mounted according to the manufacturer's specifications in the same manner as it would be mounted in normal field operations;\n(6) The transducer must be isolated from any external electromagnetic fields; and\n(7) For reference accuracy testing of differential-pressure transducers, the downstream side of the transducer must be vented to the atmosphere.\n(b) Before reference testing begins, the following pre-conditioning steps must be followed:\n(1) After power is applied to the transducer, it must be allowed to stabilize for at least 30 minutes before applying any input pressure or temperature;\n(2) The transducer must be exercised by applying three full-range traverses in each direction; and\n(3) The transducer must be calibrated according to manufacturer specifications if a calibration is required or recommended by the manufacturer.\n(c) Immediately following preconditioning, the transducer must be tested at least three times for accuracy under § 3175.131(h). The results of these tests must be used to determine the transducer's reference accuracy under § 3175.135.","path":["Title 43—Public Lands: Interior","Subtitle B—Regulations Relating to Public Lands","CHAPTER II—BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR","SUBCHAPTER C—MINERALS MANAGEMENT (3000)","PART 3170—ONSHORE OIL AND GAS PRODUCTION","Subpart 3175—Measurement of Gas"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-43.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:15Z","sha256":"34bcb9e209d815c0895c2910c3f636b9c92fe30d8cf6c995c32dcd727d0ca25f","source_id":"us-cfr","stale":true,"prev":"us/43-cfr-3175.131","next":"us/43-cfr-3175.133"},"notice":"GroundRules: Original legal text. Not legal advice."}