[Code of Federal Regulations]
[Title 40, Volume 30]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1065.525]

[Page 669-670]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 1065_TEST PROCEDURES AND EQUIPMENT--Table of Contents
 
                   Subpart F_Running an Emission Test
 
Sec. 1065.525  Engine dynamometer test run.

    Take the following steps for each test:
    (a) Prepare the engine, dynamometer, and sampling system. Change 
filters or other replaceable items and check for leaks as necessary.
    (b) If you are using bag samples, connect evacuated sample-
collection bags to the collection system for the dilute exhaust and 
dilution air sample.
    (c) Attach the CVS to the engine's exhaust system any time before 
starting the CVS.
    (d) Start the CVS (if not already started), the sample pumps, the 
engine cooling fans, and the data-collection system. Before the test 
begins, preheat the CVS's heat exchanger (if used) and the heated 
components of any continuous sampling systems to designated operating 
temperatures.
    (e) Adjust the sample flow rates to the desired levels and set to 
zero the devices in the CVS that measure gas flow. The venturi design 
fixes the sample flow rate in a CFV-CVS.
    (f) Start the engine if engine starting is not part of the test 
cycle, as specified in the standard-setting part.

[[Page 670]]

    (g) Run the test cycle specified in the standard-setting part and 
collect the test data.
    (h) As soon as practical after the test cycle is complete, analyze 
the bag samples.