Text
Title 40: Protection of Environment
CHAPTER I: ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
SUBCHAPTER C: AIR PROGRAMS (CONTINUED)
PART 89: CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES
Subpart D: Emission Test Equipment Provisions
89.306 - Dynamometer specifications and calibration weights.
(a) Dynamometer specifications. The dynamometer test stand and other instruments for measurement of power output must meet the accuracy and calibration frequency requirements shown in table 3 in appendix A of this subpart. The dynamometer must be capable of performing the test cycle described in ? 89.410.
(b) Dynamometer calibration weights. A minimum of six calibration weights for each range used are required. The weights must be spaced to reflect good engineering judgement such that they cover the range of weights required and must be traceable to within 0.5 percent of NIST weights. Laboratories located in foreign countries may certify calibration weights to local government bureau standards.
[59 FR 31335, June 17, 1994. Redesignated at 63 FR 56995, Oct. 23, 1998]
Sponsored links
