Division 9.4.2 Data recording and control
United Kingdom
The test system shall be able to update data, record data and control systems related to operator demand, the dynamometer, sampling equipment, and measurement instruments. Data acquisition and control systems shall be used that can record at the specified minimum frequencies, as shown in Table 6.7 (this Table does not apply to discrete-mode NRSC testing).
Table 6.7
Data recording and control minimum frequencies
| Applicable Test Protocol Section | Measured Values | Minimum Command and Control Frequency | Minimum Recording Frequency |
|---|---|---|---|
| 7.6 | Speed and torque during an engine step-map | 1 Hz | 1 mean value per step |
| 7.6 | Speed and torque during an engine sweep-map | 5 Hz | 1 Hz means |
| 7.8.3 | Transient (NRTC and LSI-NRTC) duty cycle reference and feedback speeds and torques | 5 Hz | 1 Hz means |
| 7.8.2 | Discrete-mode NRSC and RMC duty cycle reference and feedback speeds and torques | 1 Hz | 1 Hz |
| 7.3 | Continuous concentrations of raw analyzers | N/A | 1 Hz |
| 7.3 | Continuous concentrations of dilute analyzers | N/A | 1 Hz |
| 7.3 | Batch concentrations of raw or dilute analyzers | N/A | 1 mean value per test interval |
| 7.6 8.2.1 | Diluted exhaust gas flow rate from a CVS with a heat exchanger upstream of the flow measurement | N/A | 1 Hz |
| 7.6 8.2.1 | Diluted exhaust gas flow rate from a CVS without a heat exchanger upstream of the flow measurement | 5 Hz | 1 Hz means |
| 7.6 8.2.1 | Intake-air or exhaust gas flow rate (for raw transient measurement) | N/A | 1 Hz means |
| 7.6 8.2.1 | Dilution air if actively controlled | 5 Hz | 1 Hz means |
| 7.6 8.2.1 | Sample flow from a CVS with a heat exchanger | 1 Hz | 1 Hz |
| 7.6 8.2.1 | Sample flow from a CVS without a heat exchanger | 5 Hz | 1 Hz mean |