CFR

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:

Table 1 of § 1065.202 —Data Recording and Control Minimum Frequencies

Applicable test protocol section	Measured values	Minimum command and control frequency	Minimum recording frequency
§ 1065.510	Speed and torque during an engine step-map	1 Hz	1 mean value per step.
§ 1065.510	Speed and torque during an engine sweep-map	5 Hz	1 Hz means.
§ 1065.514 , § 1065.530	Transient duty cycle reference and feedback speeds and torques	5 Hz	1 Hz means.
§ 1065.514 , § 1065.530	Steady-state and ramped-modal duty cycle reference and feedback speeds and torques	1 Hz	1 Hz.
§ 1065.520 , § 1065.530 , § 1065.550	Continuous concentrations of raw or dilute analyzers	N/A	1 Hz.
§ 1065.520 , § 1065.530 , § 1065.550	Batch concentrations of raw or dilute analyzers	N/A	1 mean value per test interval.
§ 1065.530 , § 1065.545	Diluted exhaust flow rate from a CVS with a heat exchanger upstream of the flow measurement	N/A	1 Hz.
§ 1065.530 , § 1065.545	Diluted exhaust flow rate from a CVS without a heat exchanger upstream of the flow measurement	5 Hz	1 Hz means.
§ 1065.530 , § 1065.545	Intake-air or raw-exhaust flow rate	N/A	1 Hz means.
§ 1065.530 , § 1065.545	Dilution air if actively controlled	5 Hz	1 Hz means.
§ 1065.530	Sample flow from a CVS that has a heat exchanger	1 Hz	1 Hz.
§ 1065.530 , § 1065.545	Sample flow from a CVS does not have a heat exchanger	5 Hz	1 Hz mean.

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