[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: 40CFR1065.202]



[Page 699-700]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 1065_ENGINE-TESTING PROCEDURES--Table of Contents

 

                    Subpart C_Measurement Instruments

 

Sec.  1065.202  Data updating, recording, and control.



    Your test system must be able to update data, record data and 

control systems related to operator demand, the dynamometer, sampling 

equipment, and measurement instruments. Use data acquisition and control 

systems that can record at the specified minimum frequencies, as 

follows:



[[Page 700]]







                   Table 1 of Sec.   1065.202--Data Recording and Control Minimum Frequencies

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                                                                    Minimum command and      Minimum recording

  Applicable test protocol section         Measured values           control frequency           frequency

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Sec.   1065.510....................  Speed and torque during an   1 Hz..................  1 mean value per step.

                                      engine step-map.

Sec.   1065.510....................  Speed and torque during an   5 Hz..................  1 Hz means.

                                      engine sweep-map.

Sec.   1065.514, Sec.   1065.530...  Transient duty cycle         5 Hz..................  1 Hz means.

                                      reference and feedback

                                      speeds and torques.

Sec.   1065.514, Sec.   1065.530...  Steady-state and ramped-     1 Hz..................  1 Hz.

                                      modal duty cycle reference

                                      and feedback speeds and

                                      torques.

Sec.   1065.520, Sec.   1065.530,    Continuous concentrations    N/A...................  1 Hz.

 Sec.   1065.550.                     of raw or dilute analyzers.

Sec.   1065.520, Sec.   1065.530,    Batch concentrations of raw  N/A...................  1 mean value per test

 Sec.   1065.550.                     or dilute analyzers.                                 interval.

Sec.   1065.530, Sec.   1065.545...  Diluted exhaust flow rate    N/A...................  1 Hz.

                                      from a CVS with a heat

                                      exchanger upstream of the

                                      flow measurement.

Sec.   1065.530, Sec.   1065.545...  Diluted exhaust flow rate    5 Hz..................  1 Hz means.

                                      from a CVS without a heat

                                      exchanger upstream of the

                                      flow measurement.

Sec.   1065.530, Sec.   1065.545...  Intake-air or raw-exhaust    N/A...................  1 Hz means.

                                      flow rate.

Sec.   1065.530, Sec.   1065.545...  Dilution air if actively     5 Hz..................  1 Hz means.

                                      controlled.

Sec.   1065.530....................  Sample flow from a CVS that  1 Hz..................  1 Hz.

                                      has a heat exchanger.

Sec.   1065.530, Sec.   1065.545...  Sample flow from a CVS does  5 Hz..................  1 Hz mean.

                                      not have a heat exchanger.

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