[Code of Federal Regulations]
[Title 40, Volume 31]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1065.280]

[Page 711]
 
                   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