§ 169.2. Scope.
(a) This chapter applies to the dynamometer test procedure which can be used to assess the smoke emission characteristics of vehicular diesel engines. In particular, these procedures describe the smoke emissions test, smoke test cycle, equipment and instrumentation, instrument checks and chart reading and calculation, for evaluation of the steady-state and transient smoke emission characteristics of an engine.
(b) A full-flow smoke opacimeter as opposed to other types of smokemeters shall be required because the test is designed to monitor transient smoke. Sampling type instruments have an excessive and variable delay and do not provide an accurate measurement of the transient smoke output of the engine. Appendix A shows that the Beer-Lambert law can be used to correlate opacity measurements with different meter path lengths.
(c) Additional or modified test conditions may be requested when this chapter is cited in a request for a smoke assessment. These modified test conditions should be clearly stated whenever the results of the smoke assessments are reported. Similarly if the fuel is specified in the test request, this should be stated when the results are reported.
Source The provisions of this § 169.2 adopted August 26, 1977, effective August 27, 1977, 7 Pa.B. 2432.
No part of the information on this site may be reproduced for profit or sold for profit.
This material has been drawn directly from the official Pennsylvania Code full text database. Due to the limitations of HTML or differences in display capabilities of different browsers, this version may differ slightly from the official printed version.
