Heavy Vehicle (Vehicle Standards) National Regulation (NSW)

The requirements stated in the following subsections are the minimum standards for the dynamometer, emissions measurement and data management systems necessary to enable the proper conduct of the DT80 test cycle mentioned in section 96(3)(c).

The DT80 test cycle must be conducted on a chassis dynamometer system that—

can undertake a full throttle transient DT80 test cycle, as described in section 97, for the vehicle being tested; and

provides for vehicle speed measurement and display, to an accuracy of ± 1% of actual speed; and

provides internal steady state accuracy of ± 1% of calculated required tractive load over ambient temperatures of 2°–40° C: and

provides a T95 response time of 3 seconds or less; and

provides inertial loading as required by the DT80 protocol at speeds >15 km/h; and

compensates for aerodynamic drag, rolling resistance and other parasitic losses; and

corrects for ambient temperature, humidity and air density; and

provides torque measurement accuracy of better than 1% full scale; and

maintains roller speed within ± 10 km/h through gear changes; and

restricts overshoot upon initial acceleration of rollers from rest; and

incorporates a driver control panel for remote operation of critical functions from driver's seat, including controls for start test and stop test; and

incorporates an emergency system override function; and

is able to communicate speed, load and status signals to enable the driver to undertake the test in accordance with the DT80 procedure; and

is integrated with the gas and particulate analysis system to initiate the start and finish of sampling and measurement, and generates emission results without the need for post-test processing.

The emissions measurement system used for the DT80 test cycle must—

be integrated with the dynamometer system stated in subsection (2); and

have a data averaging interval of 1 second for all equipment; and

provide emissions data sampling output ≥ 5Hz; and

measure oxides of nitrogen (from a diluted and conditioned sample) with an accuracy of ± 30ppm over the range 0–1000ppm and ± 5% over the range 1001–5000ppm; and

measure particulate matter (from diluted sample) as TSP or PM 10 with an accuracy of ± 10% on a real time continuous basis over a range of 0–1000 mg/m³ actual exhaust concentration at a sample temperature of < 51.7°C; and

measure opacity (from raw exhaust gas sample) with an accuracy of ± 1% over a range of 0–100% opacity; and

measure flow rate with an accuracy of ± 5%; and

measure ambient temperature with an accuracy of ± 1°C over a range of 0–50°C; and

measure ambient humidity with an accuracy of ± 5% over a range of 0–100%; and

compensate/correct for ambient humidity and temperature; and

compensate for exhaust gas transport times and delays; and

provide on-line calibration of the analytical system; and

provide an exhaust sample collection and conditioning system—

that is optimised to accommodate the exhaust temperature and flow rate, and emission concentration, for the vehicle being tested; and

that provides adequate conditioning of the exhaust gas to eliminate water in the sample stream and reduce temperatures to enable PM to be sampled at < 51.7°C; and

utilise materials and equipment compatible with the exhaust from diesel fuelled vehicles.

The data management system used for the DT80 test cycle must—

be integrated with the dynamometer and emissions measurement systems stated in subsections (2) and (3); and

record the following items for each test—

• date, time, location and operator

• emissions analyser calibration data

• vehicle input data, including test mass tractive load corrections and identifying information

• dynamometer data on a second by second basis (load, speed, distance)

• test data on a second by second basis from which a mass emission test result in g/km/t can be generated; and

display, store and report all data in SI units; and

provide a system for electronic backup of test data to local and remote media; and

incorporate a quality control system that—

ensures calibrations are carried out in accordance with manufacturers' specifications; and

provides records consistent with normal audit requirements; and

print a test report containing at least the following items—

• registered business name, ABN and address of the test facility

• registration number, make, model, GVM rating and date of manufacture of the tested vehicle

• date and location of test

• the final calculated NOx and PM results in g/km/t

• the final calculated opacity results in %

• a statement of pass or fail for each emission compared to the emission limits stated in section 96

• the signature of the test facility operator confirming that the test was conducted in accordance with the test procedures set out in section 97 and the requirements of this section.