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►B COUNCIL DIRECTIVE
of 20May 1975
on the approximation of the laws of the Member States relating to the suppression of radio
interference produced by spark-ignition engines fitted to wheeled agricultural or forestry tractors
(75/322/EEC)
(OJ L 147, 9.6.1975, p. 28)
Corrected by:
►C1Corrigendum, OJ L 226, 18.8.1976, p. 16 (75/322)
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COUNCIL DIRECTIVE
of 20May 1975
on the approximation of the laws of the Member States relating to
the suppression of radio interference produced by spark-ignition
engines fitted to wheeled agricultural or forestry tractors
(75/322/EEC)
THE COUNCIL OF THE EUROPEAN COMMUNITIES,
Having regard to the Treaty establishing the European Economic
Community, and in particular Article 100 thereof;
Having regard to the proposal from the Commission;Having regard to the Opinion of the European Parliament(
1);
Having regard to the Opinion of the Economic and Social
Committee(2);
Whereas the technical requirements with which tractors must comply
pursuant to national laws relate, inter alia , to the suppressionof radio
interference;
Whereas these requirements differ from one Member State to another;
whereas it is therefore necessary that all Member States adopt the samerequiremen ts either inadditionto or inplace of their existin g rules, inparticular to allow the EEC type approval procedure which was thesubject of Council Directive 74/150/EEC (
3) of 4 March 1974 onthe
approximationof the laws of the Member States relatin g to the typeapproval of wheeled agricultural or forestry tractors to be applied inrespect of each type of tractor,
HAS ADOPTED THIS DIRECTIVE:
Article 1
1. ‘Agricultural or forestry tractor' means any motor vehicle fitted
with wheels or ►C1endless tracks ◄and having at least two axles,
the mainfun ctionof which lies inits tractive power an d which isspecially designed to tow, push, carry or power certain tools, machineryor trailers intended for agricultural or forestry use. It may be equippedto carry a load and passengers.
2. This Directive shall apply only to tractors defined in the preceding
paragraph, fitted with pneumatic tyres, and which have two axles and amaximum design speed of between 6 and 25 km/h and a spark-ignitionengine.
Article 2
No Member State may refuse to grant EEC type approval or national
type approval of a tractor on grounds relating to the radio interferenceproduced by the spark-ignition system of its propulsion engine if suchtractors are fitted with interference suppression equipment meeting therequirements of the Annexes.
Article 3
No Member State may refuse the registrationor prohibit the sale, en try
into service or use of a tractor on grounds relating to the radio interfer-ence produced by the spark-ignition system of its propulsion engine if
(1) OJ No C 160, 18. 12. 1969, p. 29.
(2) OJ No C 48, 16. 4. 1969, p. 21.
(3) OJ No L 84, 28. 3. 1974, p. 10.
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such tractors are fitted with interference suppression equipment meetingthe requirements of the Annexes.
Article 4
A Member State which has granted type approval shall take the neces-
sary measures to be informed of any modification of a part or character-istic referred to in 2.2 — Annex I. The competent authorities of thatState shall determine whether fresh tests should be carried out on themodified type of the tractor and a fresh report drawn up. Where suchtests reveal failure to comply with the requirements of this Directive,the modificationshall n ot be approved.
Article 5
The amendments necessary for adapting the requirements of the
Annexes to technical progress shall be adopted in accordance with theprocedure laid downinArticle 13 of Directive 74/150/EEC.
Article 6
1. Member States shall bring into force the provisions necessary in
order to comply with this Directive within 18 months of its notificationand shall forthwith inform the Commission thereof.
2. Member States shall ensure that the texts of the main provisions of
national law which they adopt in the field covered by this Directive arecommunicated to the Commission.
Article 7
This Directive is addressed to the Member States.
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ANNEX I (1)
DEFINITIONS, APPLICATION FOR EEC TYPE APPROVAL, MARK-
INGS, EEC TYPE APPROVAL, SPECIFICATIONS, TESTS,
CONFORMITY OF PRODUCTION
(1.)
2. DEFINITIONS
For the purposes of this Directive,
(2.1.)2.2. ‘Tractor type as regards radio interference suppression' means tractors
which do not differ in such essential respects as:
2.2.1. The shapes and constituent materials of the part of the body forming the
engine compartment and the part of the passenger compartment nearestto it.
2.2.2. The type of engine (whether two- or four-stroke, number and capacity of
cylinders, number of carburettors, arrangement of valves, maximumpower and corresponding r.p.m.).
2.2.3 The position or model of the ignition circuit components (coil, distrib-
utor, sparking plugs, screening, etc.).
2.2.4. The position of metal components housed in the engine compartment
(e.g. heating appliances, spare wheel, air filter, etc.).
2.3. ‘Limitation of radio interference'means a reduction of radio interference
in the sound-broadcasting and television frequency bands to a level suchthat there is no appreciable interference with the functioning of receiversnot carried on the vehicle itself; this condition is fulfilled if the level ofinterference remains below the limits laid down in 6.2.2 below;
2.4. ‘Radio interference suppression equipment' means a complete set of
components necessary for limiting radio interference from the ignitionsystem of a tractor. Radio interference suppression equipment alsoincludes earthing strips and screening components incorporated speciallyfor radio interference suppression;
2.5. ‘Suppression equipment of different types' means sets of equipment
which differ insuch essen tial respects as:
2.5.1. That their components bear different trade names or marks.2.5.2. That the ‘high-frequency'characteristics of a component are different or
their components differ in shape or size.
2.5.3. That the operating principles of at least one component are different.2.5.4. That their components are assembled differently.2.6. ‘Suppression equipment component'means one of the individual constit-
uent parts of the suppression equipment.
3. APPLICATION FOR EEC TYPE APPROVAL
3.1. The applicationfor EEC type approval of a tractor type with regard to
radio interference suppression shall be submitted by the vehicle manu-facturer or by his authorized representative.
3.2. It shall be accompanied by the following documents in triplicate and by
the following particulars:
3.2.1. A description of the tractor type with regard to the items mentioned in
2.2 above, accompanied by an exploded view or a photograph of theengine compartment. The numbers and/or symbols identifying theengine type and the tractor type shall be shown.
3.2.2. A list of the components, duly identified, constituting the radio interfer-
ence suppression equipment.
(1) The text of the Annexes corresponds to that of Council Directive 72/245/EEC of 20
Jun e 1972 onthe approximationof the laws of the Member States relatin g to thesuppression of radio interference produced by spark-ignition engines fitted to motorvehicles (OJ No L 152, 6. 7. 1972, p. 15).
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3.2.3. Detailed drawings of each component to enable it to be easily located
and identified.
3.2.4. Particulars of the nominal value of the direct-current resistances, and, in
the case of resistive ignition cables, of their nominal resistance permetre.
3.3. Inaddition , the applicationfor EEC type approval shall be accompan ied
by a sample of the radio interference suppression equipment.
3.4. A vehicle representative of the tractor type to be approved shall be
submitted to the technical service responsible for the type approval tests.
4. MARKINGS
4.1. The radio interference suppression equipment components shall bear:4.1.1. The trade name or mark of the manufacturers of the equipment and its
components.
4.1.2. The trade descriptiongivenby the man ufacturer.4.2. The markings shall be repeated on the radio interference suppression
cables at intervals of not more than twelve centimetres.
4.3. These markings shall be clearly legible and indelible.
5. TYPE APPROVAL
(5.1.)(5.2.)5.3. A form conforming to the model in Annex IV shall be attached to the
EEC type approval certificate.
(5.4.)(5.5.)(5.6.)
6. SPECIFICATIONS6.1.General specifications
The components of the radio interference suppression equipment shall
be so designed, constructed and fitted as to enable the tractor, in normalconditions of use, to comply with the requirements of this Directive.
6.2.Specifications concerning radio interference
6.2.1. Method of measurement
The interfering radiation set up by the tractor type submitted for
approval shall be measured by the method described in Annex II.
6.2.2. Reference limits
6.2.2.1. The radiationlimits based onquasi-peak measuremen ts shall be 50
µV/m in the 40-75 MHz frequency band and 50-120 µ/Vm inthe 75-250
MHz frequency band, this limit increasing linearly with frequenciesabove 75 MHz.
6.2.2.2. If measurements are made with peak measuring equipment, the readings,
expressed in µ/Vm, shall be divided by 10.
6.2.3. Onthe tractor type submitted for approval inrespect of radio in terfer-
ence suppression, the measured values shall be not less than 20 per centbelow the reference limits.
7. TESTS
Compliance with the requirements of section 6 above shall be checked
inaccordan ce with the method showninAn n ex II.
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(8.)
9. CONFORMITY OF PRODUCTION
(9.1.)9.2. When the conformity of a tractor taken from the series is being verified,
production shall be deemed to conform to the requirements of thisDirective if the levels measured do not exceed by more than 25 % thelimits prescribed in6.2.2.
9.3. If at least on e of the levels measured onthe tractor takenfrom the series
exceeds the limits prescribed in6.2.2. by more than25 %, the man ufac-turer may request that measurements be made on a sample of at least sixtractors taken from the series. The results for each frequency band shallbe interpreted by the statistical method shown in Annex III.
(10.)(11.)
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ANNEX II
METHOD OF MEASUREMENT OF RADIO INTERFERENCE
PRODUCED BY HIGH-VOLTAGE IGNITION SYSTEMS
1. MEASURING APPARATUS
The measuring equipment shall comply with the requirements of Publication
No 2 (first edition, 1961) of the International Special Committee on RadioInterference (CISPR) or with the specifications applicable to peak typemeasurin g apparatus giveninCISPR PublicationNo 5 (first edition , 1967).
Note:
Where the available equipment does not fully meet all the CISPR specifica-
tions, discrepancies must be clearly stated.
2. EXPRESSION OF RESULTS
The results of measurements must be expressed in µV/m for 120 kHz
bandwidth. For statistical purposes, the logarithmic unit dB ( µV/m) shall be
used. If for certain frequencies the actual bandwidth B (expressed in kHz) ofthe measuring apparatus differs slightly from 120 kHz, the readings takenshould be converted to 120 kHz bandwidth through multiplication by a
factor120
B.
3. MEASURING SITE
The measuring site shall be a level area free from appreciable wave-
reflecting surfaces within an ellipse having a major axis of 20 m and aminor axis of 17 ·3 m. The antenna and the centre of the engine must be
located onthe major axis of the ellipse, the plan e of symmetry of the tractorbeing parallel to the minor axis. The antenna and the point of intersection ofthe side of the engine nearest to the antenna with the major axis must eachbe located at a focal point of the ellipse. The measuring set, or the test hutor vehicle inwhich the set is located, may be withinthe ellipse buthorizontally not closer than 3 m to the antenna, in a direction opposite to thetractor being measured. Furthermore, the absence of any extraneous orsignal which could materially affect the measurement must be ensured; acheck is therefore made, with the engine stopped, before and after taking themeasurements, which can be considered satisfactory only if the readings areat least 10 dB above the highest obtained at the pre- and post-measurementchecks.
4. TRACTOR
4.1. Only the ancillary electrical equipment necessary for the running of the
engine shall be operating.
4.2. The engine shall be at its normal operating temperature. During each
measurement, the engine shall be operated as follows:
Method of measurement
Number of cylinders
Peak Quasi-peak
One Above idling 2 500 r.p.m.
More thanon e Above idling 1 500 r.p.m.
4.3. Measurements shall not be made while rain is falling on the vehicle or
within10 min utes after rainhas stopped.
5. ANTENNA5.1.Height
The centre of the dipole shall b e 3 m above the ground.
5.2.Distance of measurement
The horizontal distance from the antenna to the nearest metal part of the
tractor shall be 10 m.
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5.3.Antenna location relative to tractor
The antenna shall be placed successively on the left- and right-hand sides of
the tractor at two positions of measurement, with the aerial parallel to theplane of symmetry of the tractor and in line with the engine. (See Appendixto this Annex).
5.4.Antenna position
At each of the measuring points, readings shall be taken with the dipole in a
horizontal and in a vertical position. (See Appendix to this Annex).
5.5.Readings
The maximum of four readings shall be taken as the characteristic reading at
the frequency at which the measurements were made.
6. FREQUENCIES
Measurements shall be made within the 40 to 250 MHz range. A tractor is
considered as very likely to meet the required suppression limits over thewhole frequency range if it meets them at the following six frequencies: 45,65, 90, 150, 180 and 220 (± 5 MHz). (The 5 MHz tolerance for the sixfrequencies chosen should make it possible to avoid interference fromtransmissions operating on the nominal frequencies).
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Appendix
ANTENNA DIRECTION RELATIVE TO TRACTOR
Example
Plan
Dipole antenna in position to measure horizontal component of the radiation
Elevation
Dipole antenna in position to measure horizontal component of the radiation
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ANNEX III
STATISTICAL METHOD OF CHECKING RADIO INTERFERENCE
SUPPRESSION
Inorder to en sure with an80 % probability that 80 % of the vehicles con form to
a specified limit L, the following condition must be satisfied:
x–+k Sn≤L
where x–= arithmetic meanof the results onntractors
k = statistical factor which depen ds onnas showninthe followin g
table:
n=6 789101112
k=1 ·421·351·301·271·241·211·20
Sn= stan dard deviationof results onntractors
Sn2= Σ(x − x–)2/(n− 1)
x = individual resultL = specified limit
S
n,x ,x–and L expressed in dB ( µV/m).
If a first sample of n tractors does not meet the specification, a second sample of
n tractors shall be tested and the overall results assessed as coming from asample of 2ntractors.
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ANNEX IV