1. LawStack
  2. Title 40 - Protection of Environment
  3. Chapter I - ENVIRONMENTAL PROTECTION AGENCY
  4. Subchapter C - AIR PROGRAMS
  5. Part 89 - CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES
  6. Subpart D - Emission Test Equipment Provisions
  7. 40 CFR § 89.325
40 CFR § 89.325
Engine intake air temperature measurement
June 9, 2020
CFR

(a) Engine intake air temperature measurement must be made within 122 cm of the engine. The measurement location must be made either in the supply system or in the air stream entering the supply system.

(b) The temperature measurements shall be accurate to within ±2 °C.

[59 FR 31335, June 17, 1994. Redesignated at 63 FR 56995, Oct. 23, 1998]

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§ 89.324 Calibration of other equipment
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§ 89.326 Engine intake air humidity measurement

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