{"data":{"id":"us/40-cfr-table-b-4-to-subpart-b-of-part-53","jurisdiction":"us","citation":"40 CFR Table B-4 to Subpart B of Part 53","heading":"Table B-4 to Subpart B of Part 53—Line Voltage and Room Temperature Test Conditions","body":"Test day Line voltage,1 rms Room temperature,2 °C Comments\n0 115 25 Initial set-up and adjustments.\n1 125 20\n2 105 20\n3 125 30 Adjustments and/or periodic maintenance permitted at end of tests.\n4 105 30\n5 125 20\n6 105 20 Adjustments and/or periodic maintenance permitted at end of tests.\n7 125 30 Examine test results to ascertain if further testing is required.\n8 105 30\n9 125 20 Adjustments and/or periodic maintenance permitted at end of tests.\n10 105 20\n11 125 30\n12 105 30 Adjustments and/or periodic maintenance permitted at end of tests.\n13 125 20\n14 105 20\n15 125 30\n1 Voltage specified shall be controlled to ±1 volt.\n2 Temperatures shall be controlled to ±1 °C.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 53—AMBIENT AIR MONITORING REFERENCE AND EQUIVALENT METHODS","Subpart B—Procedures for Testing Performance Characteristics of Automated Methods for SO2, CO, O3, and NO2"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"8a4aa2ae12e0b30cd029aebf560c5e89e6808e0ca9d21fefae3244b2ca25d80b","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-b-3-to-subpart-b-of-part-53","next":"us/40-cfr-table-b-5-to-subpart-b-of-part-53"},"notice":"GroundRules: Original legal text. Not legal advice."}