[Code of Federal Regulations]

[Title 40, Volume 31]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR1065.250]



[Page 707-708]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 1065_ENGINE-TESTING PROCEDURES--Table of Contents

 

                    Subpart C_Measurement Instruments

 

Sec.  1065.250  Nondispersive infra-red analyzer.



    (a) Application. Use a nondispersive infra-red (NDIR) analyzer to 

measure CO and CO2 concentrations in raw or diluted exhaust 

for either batch or continuous sampling.

    (b) Component requirements. We recommend that you use an NDIR 

analyzer that meets the specifications in



[[Page 708]]



Table 1 of Sec.  1065.205. Note that your NDIR-based system must meet 

the calibration and verifications in Sec.  1065.350 and Sec.  1065.355 

and it must also meet the linearity verification in Sec.  1065.307. You 

may use an NDIR analyzer that has compensation algorithms that are 

functions of other gaseous measurements and the engine's known or 

assumed fuel properties. The target value for any compensation algorithm 

is 0.0% (that is, no bias high and no bias low), regardless of the 

uncompensated signal's bias.



                        Hydrocarbon Measurements