[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: 40CFR1065.202]

[Page 700-701]
 
                   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 701]]



                   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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