S.L. 427.19 Art. 25air on the surface and in dB, in which use either by a is above the cutting device The period 26. HIGH Basic noise MSA EN Operating Test under The high auxiliary units the working maximum adapted nozzle The flow measurements Period of The period 27. HIGH Basic noise MSA EN = 1 m Operating Mounting T

HEDGE TRIMMERS

Basic noise emission standard MSA EN ISO 3744:2000 Test area

MSA ISO 11094:2002 In case of dispute, measurements shall be carried out in the open artificial surface (point 4.1.2 of MSA ISO 11094:2002) Environmental correction K2A Measurement in the open air

K = 0 2A Measurements indoors The value of the constant , determined without the artificial K 2A accordance with Annex A to MSA EN ISO 3744:2000, shall be < 2.0 case K shall be disregarded 2A Measurement surface/number of microphone positions/measuring distance MSA ISO 11094:2002

Operating conditions during test Mounting of equipment The hedge trimmer shall be held in the natural manner for normal person or by a suitable device in such a way that its cutting device centre of the hemisphere Test under load The hedge clipper shall be operated at its nominal speed with the working Period of observation of observation shall be at least 15 seconds

PRESSURE FLUSHERS emission standard ISO 3744:2000

conditions during test load pressure flusher shall be tested in a stationary position. The engine and operate at the speed provided by the manufacturer for the operation of equipment; the high pressure pump(s) is (are) operating at its (their) speed and operating pressure provided by the manufacturer. Using an the pressure reduction valve shall be just on the point of reacting. noise of the nozzle shall not have any influence on the results of the observation of observation shall at least be 30 seconds PRESSURE WATER JET MACHINES

emission standard ISO 3744:2000 Measurement surface/number of microphone positions/measuring distance

Parallelepiped/according to MSA EN ISO 3744:2000 with measurement distance d conditions during test of equipment pressure water jet machine shall be installed on the reflecting plane; machines shall be placed on a support 0.40 m high, unless otherwise manufacturer’s conditions of installation load high-pressure cleaning machine shall be brought to its steady state within the specified by the manufacturer. During testing the nozzle shall be coupled to high-pressure cleaning machine that causes the highest pressure if used the manufacturer’s instructions.

observation of observation shall at least be 15 seconds HYDRAULIC HAMMERS

emission standard ISO 3744:2000 Meusurement surface/number of microphone positions/measuring distance

Hemisphere/six microphone positions according to Part A, item 5/r = 10m conditions during tests of the equipment the hammer is attached to a carrier and a special test block structure shall be used. Figure 28.1 gives the characteristics of this structure and shows the position of the carrier Carrier

The carrier for the test hammer shall meet the requirements of the technical specifications especially in weight range, hydraulic output oil flow and return line back pressure Mounting

Mechanical mounting as well as connections (hoses, pipes ...) must specifications given in the hammer’s technical data. All significant noise pipes and various mechanical components needed for installation, eliminated. All component connections have to be well tightened Hammer stability and static holdforce The hammer shall be firmly held down by the carrier in order to stability as that existing under normal operating conditions. The hammer operated in an upright position Tool A blunt tool shall be used in the measurements. The length of the the requirements given in Figure 28.1 (test block) Test under load

Hydraulic input power and oil flow Operating conditions of the hydraulic hammer shall be appropriately measured and reported along with the corresponding technical specification The hammer under test must be used in such way that 90% or more of hydraulic input power and oil flow of the hammer can be reached Care shall be taken that the total uncertainty of the measurement chains

Q is kept within ± 5%. This assures the hydraulic input power determination ± 10% accuracy. Assuming linear correlation between hydraulic input emitted sound power this would mean variation of less than ± determination of the sound power level Adjustablc components having effect on the hammer power

Pre-settings of all accumulators, pressure central valves and adjustable components must meet the values given in technical data. one fixed impact rate is optional, measurements have to be made using Minimum and maximum values are presented Quantities to be measured The mean value of the hydraulic supply fine pressure during P s operation including at least 10 blows The mean value of the breaker inlet oil flow measured simultaneously Q ps T The oil temperature must lie between + 40/ + 60ºC during The temperature of the hydraulic breaker body must have been normal operating temperature before starting the measurements The prefill gas pressures of all accumulators must be measured Pa situation (breaker not operating) at stable ambient temperature 25ºC. The measured ambient temperature shall be recorded measured accumulator prefill gas pressure to be evaluated from the measured operating parameters:

Hydraulic input power of the breaker P = p - Q IN s supply line pressure measurement, ps must be measured as close to the breaker IN-port as possible s shall be measured with a pressure gauge (minimum diameter: 100 s mm; accuracy class ± 1.0% FSO) oil flow, Q must be measured from the supply pressure line as close to the breaker IN-port as possible must be measured with an electric flowmeter (accuracy class ± 2.5%

the flow reading) point of the oil temperature, T

must be measured from the oil tank of the carrier or from the hydraulic line connected to hammer. point shall be specified in the report accuracy of the temperature reading must lie within ± 2ºC of the actual value determination/determination of resulting sound power level of observation shall be at least 15 seconds measurements are repeated three times, or more if necessary. The final result as the arithmetic mean of the two highest values that do not differ by

Figure 28.1

diameter (mm)

diameter, 1 200 ± 100 mm diameter of the anvil support structure, < 1 800 mm

Diameter of the test block deck, < 2 200 mm

Diameter of the tool opening in the deck, < 350 mm

Diameter of the tool seal, < 1 000 mm tool length between the lowest part of the housing and tool seal

(mm), seal thickness above the deck, < 20 mm (if the tool seal is located deck, its thickness is not limited; it may be made of foam rubber) Distance between deck upper surface and anvil upper surface, 250 ± 50 mm

Isolating foam rubber deck seal thickness, < 30 mm thickness, 350 ± 50 mm penetration, < 50 mm quadratic shape of the test block structure is used, the maximum length equals 0.89 x corresponding diameter space between the deck and the anvil can be filled with elastic foam absorption material, density < 220 kg/m3

HYDRAULIC POWER PACKS Basic noise emission standard

MSA EN ISO 3744:2000 Operating conditions during test Mounting of equipment

The hydraulic power pack shall be installed on the reflecting plane; hydraulic power packs shall be placed on a support 0,40 m high, unless required by the manufacturer’s conditions of installation Test under load

During testing, no tools shall be coupled to the hydraulic power pack The hydraulic power pack shall be brought to its steady state within specified by the manufacturer. It shall operate at its nominal speed and pressure. The nominal speed and pressure are those appearing in the supplied to the purchaser Period of observation

The period of observation shall at least be 15 seconds