[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: 40CFR1065.280]



[Page 710]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 1065_ENGINE-TESTING PROCEDURES--Table of Contents

 

                    Subpart C_Measurement Instruments

 

Sec.  1065.280  Paramagnetic and magnetopneumatic O[bdi2] detection 

analyzers.



    (a) Application. You may use a paramagnetic detection (PMD) or 

magnetopneumatic detection MPD) analyzer to measure O2 

concentration in raw or diluted exhaust for batch or continuous 

sampling. You may use O2 measurements with intake air or fuel 

flow measurements to calculate exhaust flow rate according to Sec.  

1065.650.

    (b) Component requirements. We recommend that you use a PMD/MPD 

analyzer that meets the specifications in Table 1 of Sec.  1065.205. 

Note that it must meet the linearity verification in Sec.  1065.307. You 

may use a PMD/MPD 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.



                     Air-to-Fuel Ratio Measurements