The Noise Emission in the Environment by Equipment for use Outdoors Regulations 2001

Test of powered equipment free of load

2.2  For these measurements, the engine and hydraulic system of the equipment must be warmed up in accordance with the instructions, and safety requirements must be observed.

• The test is carried out with the equipment in a stationary position without operating the working equipment or travelling mechanism. For the purpose of the test, the engine will idle at no less than the rated speed corresponding to the net power(1).

• If the machine is powered by a generator or from the mains, the frequency of the supply current, specified for the motor by the manufacturer, shall be stable at ±1 Hz if the machine is equipped with an induction motor, and the supply voltage at ±1% of the rated voltage if the machine is equipped with a commutator motor. The supply voltage is measured at the plug of a non-detachable cable or cord, or at the inlet of the machine if a detachable cable is provided. The waveform of the current supplied from the generator shall be similar to that obtained from the mains.

• If the machine is powered by battery, the battery shall be fully charged.

• The speed used and the corresponding net power are stated by the manufacturer of the equipment and must appear in the test report.

• If the equipment is fitted with several engines, they must work simultaneously during the tests. If this is not possible, each possible combination of engine(s) is to be tested.

(1)

Net power means the power in “EC kW” obtained on the test bench at the end of the crankshaft, or its equivalent, measured in accordance with the EC method of measuring the power of internal combustion engines for road vehicles, except that the power of the engine cooling fan is excluded.