Regulation No. 57-02

Name:Regulation No. 57-02
Description:Headlamps - Motorcycles.
Official Title:Uniform Provisions Concerning the Approval of: Headlamps for Motorcycles and Vehicles Treated as such.
Country:ECE - United Nations
Date of Issue:1983-05-31
Amendment Level:02 Series
Number of Pages:41
Vehicle Types:Component, Motorcycle
Subject Categories:Lighting and Light Signalling Equipment
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Keywords:

headlamp, regulation, approval, test, paragraph, annex, samples, tests, lamp, headlamps, beam, type, filament, photometric, requirements, lens, passing, production, driving, material, values, conformity, sample, lenses, prescribed, light, results, force, measured, line, point, mixture, manufacturer, granted, measurement, appendix, tape, mark, procedure, series, accordance, number, carried, resistance, amendments, approved, lux, lamps, applying, parties

Text Extract:

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E/ECE/324 )
E/ECE/TRANS/505 ) Rev.1/Add.56/Rev.1/Amend.2
December 5, 2001
STATUS OF UNITED NATIONS REGULATION
ECE 57
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
HEADLAMPS FOR MOTORCYCLES AND VEHICLES TREATED AS SUCH
Incorporating:
Supplement 2 to the 01 series of amendments
Date of Entry into Force: 10.03.95
Corr. 1 to Amendment 2 to the 01 series of amendments
Date of Entry into Force: 10.03.95
Supplement 3 to the 01 series of amendments
Date of Entry into Force: 27.04.98
02 series of amendments
Date of Entry into Force: 12.09.01

REGULATION
REGULATION NO. 57
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF HEADLAMPS
FOR MOTORCYCLES AND VEHICLES TREATED AS SUCH
CONTENTS
1.
Scope
2.
Definitions
3.
Application for approval of a headlamp
4.
Markings
5.
Approval
6.
General specifications
7.
Special specifications
8.
Provisions concerning coloured lenses and filters
9.
Transitional provisions
10.
Conformity of production
11.
Penalties for non-conformity of production
12.
Modification and extension of approval of a type of headlamp
13.
Production definitely discontinued
14.
Names and addresses of technical services responsible for conducting approval tests, and of
administrative departments
ANNEXES
Annex 1 – Communication concerning the approval or extension or refusal or withdrawal of approval or
production definitely discontinued of a type of headlamp pursuant to Regulation No. 57
Annex 2 – Arrangements of approval marks
Annex 3 – Photometric tests
Annex 4 – Tests for stability of photometric performance of headlamps in operation
Annex 5 – Minimum requirements for conformity of production control procedures
Annex 6 – Requirements for lamps incorporating lenses of plastic material - testing of lens or material
samples and of complete lamps.
Appendix 1 – Chronological order of approval tests
Appendix 2 – Method of measurement of the diffusion and transmission of light
Appendix 3 – Spray testing method
Appendix 4 – Adhesive tape adherence test
Annex 7 ⎯ Minimum requirements for sampling by an inspector.

3.2.2. a brief technical description stating, in particular, the category or categories of the filament
lamp provided (see Annex 3, Paragraph 6, to this Regulation);
3.2.3. two samples of the type of headlamp with colourless lenses.
3.2.4. for the test of plastic material of which the lenses are made:
3.2.4.1. thirteen lenses;
3.2.4.1.1. six of these lenses may be replaced by six samples of material at least 60 x 80 mm in size,
having a flat or convex outer surface and a substantially flat area (radius of curvature not
less than 300 mm) in the middle measuring at least 15 x 15 mm;
3.2.4.1.2. every such lens or sample of material shall be produced by the method to be used in mass
production;
3.2.4.2. a reflector to which the lenses can be fitted in accordance with the manufacturer's
instructions.
3.3. The materials making up the lenses and coatings, if any, shall be accompanied by the test
report of the characteristics of these materials and coatings if they have already been
tested.
3.4. The competent authority shall verify the existence of satisfactory arrangements for ensuring
effective control of the conformity of production before type approval is granted.
4. MARKINGS
4.1. Headlamps submitted for approval shall clearly, legibly and indelibly bear the following
inscriptions:
4.1.1. the trade name or mark of the applicant;
4.1.2. externally and/or on the lens the indication of the exterior marking of the headlamp, visible
when the headlamp is installed on the vehicle.
All units meeting the requirements of this Regulation which are so designed that the filament
of the passing beam shall not be lit simultaneously with that of any other lighting function
with which it may be reciprocally incorporated shall be marked with an oblique stroke (/)
placed behind the passing lamp symbol in the approval mark.
4.1.3. on the back of the headlamp the indication of the S and/or S category of the admitted
filament lamp;

5.4.1. an international approval mark consisting of:
5.4.1.1. a circle surrounding the Letter "E" followed by the distinguishing number of the country
which has granted approval;
5.4.1.2. an approval number.
5.4.2. In every case the relevant operating mode used during the test procedure according to
Paragraph 1.1.1.1. of Annex 4 and the allowed voltage(s) according to Paragraph 1.1.1.2. of
Annex 4 shall be stipulated on the approval certificates and on the notice transmitted to the
countries which are Contracting Parties to the Agreement and which apply this Regulation.
In the corresponding cases the device shall be marked as follows:
On units meeting the requirements of this Regulation which are so designed that the
filament of the passing beam shall not be lit simultaneously with that of any other lighting
function with which it may be reciprocally incorporated, an oblique stroke (/) shall be placed
behind the passing beam symbol in approval mark.
5.5. The markings according to Paragraph 5.4. shall be clearly legible and indelible.
5.6. Annex 2 to this Regulation gives an example of the arrangement of the approval mark.
6. GENERAL SPECIFICATIONS
6.1. Each sample of a type of headlamp shall conform to the specifications set forth in this
Paragraph and in Paragraph 7 below and, if necessary, to those set forth in Paragraph 8.
6.2. Headlamps shall be so designed and constructed that, in normal use, despite the vibrations
to which they may be subjected, their satisfactory operation continues to be ensured and
they retain the characteristics prescribed by this Regulation.
6.2.1. Headlamps shall be fitted with a device enabling them to be so adjusted on the vehicle as to
comply with the rules applicable to them. Such device need not be fitted on components in which
the reflector and the diffusing lens cannot be separated, provided the use of such components is
confined to vehicles on which the headlamps setting can be adjusted by other means.
Where a headlamp providing a driving beam and a headlamp providing a passing beam,
each equipped with its own lamp, are assembled to form a composite unit the adjusting
device shall enable each optical system individually to be duly adjusted.

which can also be expressed as follows:
dominant wave-length
575 - 585 n m
purity factor
0,90 - 0,98
The transmission factor must be
≥ 0,78
The transmission factor shall be determined by using a light source with a colour
temperature of 2,856 K. (Corresponding to illuminant A of the International Commission on
Illumination (CIE)).
8.2. The filter must be part of the headlamp, and must be attached to it in such a way that the
user cannot remove it either inadvertently or intentionally, with ordinary tools.
8.3. Observation Concerning Colour
Since any approval under this Regulation is granted, pursuant to Paragraph 8.1. above, for
a type of headlamp emitting either colourless light or selective yellow light, Article 3 of the
agreement to which the Regulation is annexed shall not prevent the Contracting Parties
from prohibiting headlamps emitting a beam of uncoloured or selective yellow light on
vehicles registered by them.
9. TRANSITIONAL PROVISIONS
9.1. As from six months after the official date of entry into force of Regulation No. 113,
Contracting Parties applying this Regulation shall cease to grant ECE approvals according
to this Regulation.
9.2. Contracting Parties applying this Regulation shall not refuse to grant extensions of approval
if the type of headlamp corresponds to the requirements of this Regulation as amended by
the 01 series of amendments.
9.3. Existing MB-approvals granted under this Regulation before the date of entry into force of
Regulation No. 113 and all extensions of these approvals, including those to a preceding
series of amendments to this Regulation granted subsequently, shall remain valid
indefinitely.
9.4. Contracting Parties applying this Regulation shall continue to issue approvals for headlamps
on the basis of this Regulation, provided that the headlamps are intended as replacements
for fitting to vehicles in use.
9.5. As from the official date of entry into force of Regulation No. 113, no Contracting Party
applying this Regulation shall prohibit the fitting on a new vehicle type of a headlamp
approved under Regulation No. 113.
9.6. Contracting Parties applying this Regulation shall continue to allow fitting on a vehicle type
or vehicle of a headlamp approved to this Regulation.
9.7. Contracting Parties applying this Regulation shall continue to allow fitting or use on a vehicle
in use of a headlamp approved to this Regulation as amended by the previous series of
amendments, provided that the headlamp is intended for replacement.

10.5. Headlamps with apparent defects are disregarded.
11. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
11.1. The approval granted in respect of a type of headlamp pursuant to this Regulation may be
withdrawn if the requirements set forth above are not met or if a headlamp bearing the
approval mark does not conform to the type approved.
11.2. If a Contracting Party to the Agreement applying this Regulation withdraws an approval it
had previously granted, it shall forthwith so notify the other Contracting Parties applying this
Regulation, by means of a communication form conforming to the model in Annex 1 to this
Regulation.
12. MODIFICATION AND EXTENSION OF APPROVAL OF A TYPE OF HEADLAMP
12.1. Every modification of the type of headlamp shall be notified to the administrative department
which approved the type of headlamp. The department may then either:
12.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect and
that in any case the headlamp still complies with the requirements; or
12.1.2. Require a further test report from the technical service responsible for conducting the tests.
12.2. Confirmation or refusal of approval, specifying the alterations shall be communicated by the
procedure specified in Paragraph 5.3. above to the Parties to the Agreement applying this
Regulation.
12.3. The competent authority issuing the extension of approval shall assign a series number for
such an extension and inform thereof the other Parties to the 1958 Agreement applying this
Regulation by means of a communication form conforming to the model in Annex 1 to this
Regulation.
13. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a type of headlamp
approved in accordance with this Regulation, he shall so inform the authority which granted
the approval. Upon receiving the relevant communication, that authority shall inform thereof
the other Parties to the 1958 Agreement applying this Regulation, by means of a
communication form conforming to the model in Annex 1 to this Regulation.
14. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
The Parties to the 1958 Agreement applying this Regulation shall communicate to the
United Nations Secretariat the names and addresses of the technical services responsible
for conducting approval tests and of the administrative departments which grant approval
and to which forms certifying approval or extension or refusal or withdraw of approval,
issued in other countries, are to be sent.

10. Position of the approval mark: ...................................................................................................
11. Reason (s) for extension (if applicable): ....................................................................................
12. Approval granted/refused, extended/withdrawn: ....................................................................
13. Place: .........................................................................................................................................
14. Date:...........................................................................................................................................
15. Signature:...................................................................................................................................
16. The list of documents deposited with the Administrative Service which has granted approval
is annexed to this communication and may be obtained on request.

The headlamp bearing the above approval mark is a headlamp incorporating a lens of plastic material
which has been approved in the Netherlands (E 4) under approval number 01 2440. The approval
number indicates that the approval was granted in accordance with the requirements of this Regulation,
as amended by the 01 series of amendments.
It is so designed, that the filament of the passing beam can be lit together simultaneously with the driving
beam and/or another reciprocally incorporated lighting function.

5. MEASURING AND AIMING SCREEN (dimensions in mm for 25 m distance)
6. For the filament lamps, categories S and S according to Regulation No. 37 shall be used.

1.1.1.2. Test voltage
The voltage shall be adjusted so as to supply 90% of the maximum wattage specified for
filament lamps of category S in the Regulation No. 37.
The applied wattage shall in all cases comply with the corresponding value of a filament
lamp of 12 V rated voltage, except if the applicant for approval specifies that the headlamp
may be used at a different voltage.
1.1.2. Test Results
1.1.2.1. Visual Inspection
Once the headlamp has been stabilised to the ambient temperature, the headlamp lens and
the external lens, if any, shall be cleaned with a clean, damp cotton cloth. It shall then be
inspected visually; no distribution, deformation, cracking or change in colour of either the
headlamp lens or the external lens, if any, shall be noticeable.
1.1.2.2. Photometric Test
To comply with the requirements of this Regulation, the photometric values shall be verified
in the following points:
Passing beam:
50 R, 50 L, B 50 HV
Driving beam:
Point of E
Another aiming may be carried out to allow for any deformation of the headlamp base due to
heat (the change of the position of the cut-off line is covered in Paragraph 2 of this Annex).
A 10% discrepancy between the photometric characteristics and the values measured prior
to the test is permissible including the tolerances of the photometric procedure.
1.2. Dirty Headlamp
After being tested as specified in subparagraph 1.1. above the headlamp shall be operated
for one hour as described in subparagraph 1.1.1., after being prepared as prescribed in
subparagraph 1.2.1., and checked as prescribed in subparagraph 1.1.2.
1.2.1. Preparation of the headlamp
1.2.1.1. Test mixture
1.2.1.1.1. For headlamp with the outside lens in glass:
The mixture of water and a polluting agent to be applied to the headlamp shall be composed of:
9 parts by weight of silica sand with a particle size of 0-100 mm,
1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 mm,

2.1. Test
The test shall be carried out in a dry and still atmosphere at an ambient temperature of
23°C ± 5°C.
Using a mass production filament lamp which has been aged for at least one hour the
headlamp shall be operated on passing beam without being dismounted form or readjusted
in relation to its test fixture. (For the purpose of this test, the voltage shall be adjusted as
specified in Paragraph 1.1.1.2.). The position of the cut-off line in its horizontal part
(between the vertical lines passing through point 50 L and 50 R) shall be verified 3 minutes
(r ) and 60 minutes (r ) respectively after operation.
The measurement of the variation in the cut-off line position as described above shall be
carried out by any method giving acceptable accuracy and reproducible results.
2.2. Test Results
2.2.1. The result in milliradians (mrad) shall be considered as acceptable for a passing lamp, only
when the absolute value Δ r = (r - r ) recorded on the headlamp is not more than 1.0 mrad
(Δ r ≤ 1.0 mrad).
2.2.2. However, if this value is more than 1.0 mrad but not more than 1.5 mrad (1.0 mrad
< Δ r ≤ 1.5 mrad) a second headlamp shall be tested as described in 2.1. after being
subjected three consecutive times to the cycle as described below, in order to stabilize the
position of mechanical parts of the headlamp on a base representative of the correct
installation on the vehicle:
Operation of the passing lamp for 1 hour, (the voltage shall be adjusted as specified in
Paragraph 1.1.1.2.),
Period of rest for 1 hour.
The headlamp type shall be considered as acceptable if the mean value of the absolute
values Δ r measured on the first sample and Δ r measured on the second sample is not
more than 1.0 mrad
⎛ Δ r


+ Δ r
2

≤ 1.0 mrad⎟


2. MINIMUM REQUIREMENTS FOR VERIFICATION OF CONFORMITY BY THE
MANUFACTURER
For each type of headlamp the holder of the approval mark shall carry out at least the
following tests, at appropriate intervals. The tests shall be carried out in accordance with
the provisions of this Regulation.
If any sampling shows non-conformity with regard to the type of test concerned, further
samples shall be taken and tested. The manufacturer shall take steps to ensure the
conformity of the production concerned.
2.1. Nature of Tests
Tests of conformity in this Regulation shall cover the photometric characteristics and the
verification of the change in vertical position of the cut-off line under the influence of heat.
2.2. Methods used in Tests
2.2.1. Tests shall generally be carried out in accordance with the methods set out in this
Regulation.
2.2.2. In any test of conformity carried out by the manufacturer, equivalent methods may be used
with the consent of the competent authority responsible for approval tests. The
manufacturer is responsible for proving that the applied methods are equivalent to those laid
down in this Regulation.
2.2.3. The application of Paragraphs 2.2.1. and 2.2.2. requires regular calibration of test apparatus
and its correlation with measurements made by a competent authority.
2.2.4. In all cases, the reference methods shall be those of this Regulation, particularly for the
purpose of administrative verification and sampling.
2.3. Nature of Sampling
Samples of headlamps shall be selected at random from the production of a uniform batch.
A uniform batch means a set of headlamps of the same type, defined according to the
production methods of the manufacturer.
The assessment shall in general cover series production from individual factories. However,
a manufacturer may group together records concerning the same type from several
factories, provided these operate under the same quality system and quality management.
2.4. Measured and Recorded Photometric Characteristics
The sampled headlamp shall be subjected to photometric measurements at the points
provided for in the Regulation, the reading being limited to points E , HV , in the case of
the driving beam, and to points HV, 50 R, 50 L in the case of the passing beam (see Figure
in Annex 3).

ANNEX 6
REQUIREMENTS FOR LAMPS INCORPORATING LENSES OF PLASTIC MATERIAL -
TESTING OF LENS OR MATERIAL SAMPLES AND OF COMPLETE LAMPS
1. GENERAL SPECIFICATIONS
1.1. The samples supplied pursuant to Paragraph 3.2.4. of this Regulation shall satisfy the
specifications indicated in Paragraphs 2.1 to 2.5 below.
1.2. The two samples of complete lamps supplied pursuant to Paragraph 3.2.3. of this
Regulation and incorporating lenses of plastic material shall, with regard to the lens
material, satisfy the specifications indicated in Paragraph 2.6. below.
1.3. The samples of lenses of plastic material or samples of material shall be subjected, with the
reflector to which they are intended to be fitted (where applicable), to approval tests in the
chronological order indicated in Table A reproduced in Appendix 1 to this Annex.
1.4. However, if the lamp manufacturer can prove that the product has already passed the tests
prescribed in Paragraphs 2.1.-2.5. below, or the equivalent tests pursuant to another
Regulation, those tests need not be repeated; only the tests prescribed in Appendix 1,
Table B, shall be mandatory.
2. TESTS
2.1. Resistance to Temperature Changes
2.1.1. Tests
Three new samples (lenses) shall be subjected to five cycles of temperature and humidity
(RH = relative humidity) change in accordance with the following programme:
3 hours at 40°C ± 2°C and 85-95% RH;
1 hour at 23°C ± 5°C and 60-75% RH;
15 hours at -30°C ± 2°C;
1 hour at 23°C ± 5°C and 60-75% RH;
3 hours at 80°C ± 2°C;
1 hour at 23°C ± 5°C and 60-75% RH;
Before this test, the samples shall be kept at 23°C ± 5°C and 60-75% RH for at least four
hours.
Note: The periods of one hour at 23°C ± 5°C shall include the periods of transition from one
temperature to another which are needed in order to avoid thermal shock effects.

2.2.2.2. Application of the Test Mixture
2.2.2.3. Cleaning
2.2.3. Results
Soak a piece of cotton cloth (as per ISO 105) until saturation with the mixture defined in
Paragraph 2.2.2.1. above and, within 10 seconds, apply it for 10 minutes to the outer face of
the sample at a pressure of 50 N/cm , corresponding to an effort of 100 N applied on a test
surface of 14 x 14 mm.
During this 10-minute period, the cloth pad shall be soaked again with the mixture so that
the composition of the liquid applied is continuously identical with that of the test mixture
prescribed.
During the period of application, it is permissible to compensate the pressure applied to the
sample in order to prevent it from causing cracks.
At the end of the application of the test mixture, the samples shall be dried in the open air
and then washed with the solution described in Paragraph 2.3. (Resistance to detergents)
23°C ± 5°C.
Afterwards the samples shall be carefully rinsed with distilled water containing not more
than 0.2% impurities at 23°C ± 5°C and then wiped off with a soft cloth.
2.2.3.1. After the test of resistance to atmospheric agents, the outer face of the samples shall be
free from cracks, scratches, chipping and deformation, and the mean variation in
transmission
T2 − T3
Δ t = ,
T
measured on the three samples according to the procedure described in Appendix 2 to this
Annex shall not exceed 0.020
( Δ t ≤ 0.020)
2.2.3.2. After the test of resistance to chemical agents, the samples shall not bear any traces of
chemical staining likely to cause a variation of flux diffusion, whose mean variation
T5 − T4
Δ d = ,
T
measured on the three samples according to the procedure described in Appendix 2 to this
Annex shall not exceed 0.020
( Δ d ≤ 0.020)

shall be measured according to the procedure described in Appendix 2 in the area specified
in Paragraph 3.2.4.1.1. of this Regulation. The mean value of the three samples shall be
such that:
∆ tm ≤ 0.100;
∆ dm ≤ 0.050.
2.5. Test of Adherence of Coatings, if any
2.5.1. Preparation of the Sample
A surface of 20 mm x 20 mm in area of the coating of a lens shall be cut with a razor blade
or a needle into a grid of squares approximately 2 mm x 2 mm. The pressure on the blade
or needle shall be sufficient to cut at least the coating.
2.5.2. Description of the Test
2.5.3. Results
Use an adhesive tape with a force adhesion of 2 N/(cm of width) ± 20% measured under the
standardised conditions specified in Appendix 4 to this Annex. This adhesive tape, which
shall be at least 25 mm wide, shall be pressed for at least five minutes to the surface
prepared as prescribed in Paragraph 2.5.1.
Then the end of the adhesive tape shall be loaded in such a way that the force of adhesion
to the surface considered is balanced by a force perpendicular to that surface. At this stage,
the tape shall be torn off at a constant speed of 1.5 m/s ± 0.2 m/s.
There shall be no appreciable impairment of the gridded area. Impairments at the
intersections between squares or at the edges of the cuts shall be permitted, provided that
the impaired area does not exceed 15% of the gridded surface.
2.6. Tests of the Complete Lamp Incorporating a Lens of Plastic Material
2.6.1. Resistance to Mechanical Deterioration of the Lens Surface
2.6.1.1. Tests
2.6.1.2. Results
The lens of lamp Sample No. 1 shall be subjected to the test described in Paragraph 2.4.1.
above.
After the test, the results of photometric measurements carried out on the lamp in
accordance with this Regulation shall not exceed by more than 30% the maximum values
prescribed at points B 50 and not be more than 10% below the minimum values prescribed
at point 50 V.
2.6.2. Test of Adherence of Coatings, if any
The lens of lamp Sample No. 2 shall be subjected to the test described in Paragraph 2.5.
above.

ANNEX 6 – APPENDIX 1
CHRONOLOGICAL ORDER OF APPROVAL TESTS
A. Tests on plastic materials (lenses or samples of material supplied pursuant to
Paragraph 3.2.4 of this Regulation)
Samples Lenses or samples of material Lenses
Tests 1 2 3 4 5 6 7 8 9 10 11 12 13
1.1. Limited photometry
(Para. 2.1.2.) x x x
1.1.1. Temperature change
(Para.2.1.1.)
x
x
x
1.1.2. Limited photometry
(Para.2.1.2.)
x
x
x
1.2.1. Transmission
measurement
x
x
x
x
x
x
x
x
x
1.2.2. Diffusion measurement x x x x x x
1.3. Atmospheric agents
(Para. 2.2.1.) x x x
1.3.1. Transmission
measurement
x
x
x
1.4. Chemical agents
(Para. 2.2.2.) x x x
1.4.1. Diffusion measurement x x x
1.5. Detergents (Para. 2.3.1.) x x x
1.6. Hydrocarbons
(Para. 2.3.2.) x x x
1.6.1. Transmission
measurement
x
x
x
1.7. Deterioration
(Para. 2.4.1.) x x x
1.7.1. Transmission
measurement
x
x
x
1.7.2. Diffusion measurement x x x
1.8. Adherence (Para. 2.5.) x

ANNEX 6 – APPENDIX 2
METHOD OF MEASUREMENT OF THE DIFFUSION AND TRANSMISSION OF LIGHT
1. EQUIPMENT (see figure)
The beam of a collimator K with a half divergence
β
x 10 rd
2 = 17.4
is limited by a diaphragm D with an opening of 6 mm against which the sample stand is
placed.
A convergent achromatic lens L , corrected for spherical aberrations, links the diaphragm D
with the receiver R; the diameter of the lens L shall be such that it does not diaphragm the
light diffused by the sample in a cone with a half top angle of β/2 = 14°.
An annular diaphragm D with angles
α
2
1
α
and
2
= 12
is
placed in an image focal plane of the lens L .
The non-transparent central part of the diaphragm is necessary in order to eliminate the light
arriving directly from the light source. It shall be possible to remove the central part of the
diaphragm from the light beam in such a manner that it returns exactly to its original
position.
The distance L D and the focal length F
of D completely covers the receiver R.
of the lens L shall be so chosen that the image
When the initial incident flux is referred to 1,000 units, the absolute precision of each
reading shall be better than 1 unit.

ANNEX 6 – APPENDIX 3
SPRAY TESTING METHOD
1. TEST EQUIPMENT
1.1. Spray Gun
The spray gun used shall be equipped with a nozzle 1.3 mm in diameter allowing a liquid
flow rate of 0.24 ± 0.02 1/minute at an operating pressure of 6.0 bars - 0, + 0.5 bar.
Under these operation conditions the fan pattern obtained shall be 170 mm ± 50 mm in
diameter on the surface exposed to deterioration, at a distance of 380 mm ± 10 mm from
the nozzle.
1.2. Test Mixture
2. TEST
The test mixture shall be composed of:
Silica sand of hardness 7 on the Mohr scale, with a grain size between 0 and 0.2 mm and
an almost normal distribution, with an angular factor of 1.8 to 2;
Water of hardness not exceeding 205 g/m for a mixture comprising 25 g of sand per litre of
water.
The outer surface of the lamp lenses shall be subjected once or more than once to the
action of the sand jet produced as described above. The jet shall be sprayed almost
perpendicular to the surface to be tested.
The deterioration shall be checked by means of one or more samples of glass placed as a
reference near the lenses to be tested. The mixture shall be sprayed until the variation in
the diffusion of light on the sample or samples measured by the method described in
Appendix 2, is such that:
T5 − T4
Δd
= = 0.0250 ± 0.0025
T
Several reference samples may be used to check that the whole surface to be tested has
deteriorated homogeneously.

ANNEX 7
MINIMUM REQUIREMENTS FOR SAMPLING BY AN INSPECTOR
1. GENERAL
1.1. The conformity requirements shall be considered satisfied from a mechanical and a
geometric standpoint, in accordance with the requirements of this Regulation, if any, if the
differences do not exceed inevitable manufacturing deviations.
1.2. With respect to photometric performance, the conformity of mass-produced headlamps shall
not be contested if, when testing photometric performances of any headlamp chosen at
random and equipped with a standard filament lamp;
1.2.1. no measured value deviates unfavourably by more than 20% from the values prescribed in
this Regulation.
For Zone III the maximum deviation may be respectively:
0.3 lux equivalent 20%
0.45 lux equivalent 30%
1.2.2. and if, for the driving beam, HV being situated within the isolux 0.75 E , a tolerance of
+ 20% for maximum values and - 20% for minimum values is observed for the photometric
values at any measuring point specified in Annex 3, Paragraphs 4.3. and 4.4. of this
Regulation.
1.2.3. If the results of the tests described above do not meet the requirements, tests on the
headlamp shall be repeated using another standard filament lamp.
1.2.4. Headlamps with apparent defects are disregarded.
1.3. The chromaticity coordinates shall be complied with when the headlamp is equipped with a
filament lamp set to Standard A colour temperature.
The photometric performance of a headlamp emitting selective yellow light when equipped
with a colourless filament lamp shall be multiplied by 0.84.
2. FIRST SAMPLING
In the first sampling four headlamps are selected at random. The first sample of two is
marked A, the second sample of two is marked B.
2.1. The Conformity is not Contested
2.1.1. Following the sampling procedure shown in Figure 1 of this Annex the conformity of
mass-produced headlamps shall not be contested if the deviation of the measured values of
the headlamps in the unfavourable directions are:
2.1.1.1. sample A
A1:
one headlamp
0%
one headlamp not more than
20%

B5: in the case of A2
both headlamps more than 20%
B6:
in the case of A2
one headlamp
0%
one headlamp more than
30%
3. REPEATED SAMPLING
In the cases of A3, B2, B3 a repeated sampling, third sample C of two headlamps and fourth
sample D of two headlamps, selected from stock manufactured after alignment, is
necessary within two months time after the notification.
3.1. The Conformity is not Contested
3.1.1. Following the sampling procedure shown in Figure 1 of this Annex the conformity of
mass-produced headlamps shall not be contested if the deviations of the measured values
of the headlamps are:
3.1.1.1. Sample C
3.1.1.2. Sample D
C1:
one headlamp
0%
one headlamp not more than
20%
C2:
both headlamps more than
0%
but not more than
20%
go to sample D
D1: in the case of C2
both headlamps 0%
3.2. The Conformity is Contested
3.2.1. Following the sampling procedure shown in Figure 1 of this Annex the conformity of
mass-produced headlamps shall be contested and the manufacturer requested to make his
production meet the requirements (alignment) if the deviations of the measured values of
the headlamps are:
3.2.1.1. Sample D
D2:
in the case of C2
one headlamp more than
0%
but not more than
20%
one headlamp not more than
20%

Figure 1
Headlamps - Motorcycles.