Traffic control equipment - Warning and safety light devices

This European Standard specifies the requirements for individual electrically operated light devices, called warning lights, emitting a continuous or regular intermittent light of a single colour which, by their colour and position alone, are used to warn, inform or guide road users. It specifies the requirements for visual, structural and operational performances and the relevant test methods to be used. These devices rely upon existing furniture to provide the mounting.
This European Standard is not applicable to lighting devices which convey messages by additional means (e.g. variable message signs) or which convey a mandatory instruction (e.g. traffic signals) or which are covered by vehicle lighting regulations.
This European Standard does not consider horizontal loads because it is the mounting to which they are fixed, which is not covered by this European Standard, which has to resist applied horizontal loads.

Anlagen zur Verkehrssteuerung - Warn- und Sicherheitsleuchten

Diese Europäische Norm legt die Anforderungen an elektrisch betriebene Einrichtungen, fest, die ein dauern-des
oder regelmäßig intermittierendes Licht einer einzelnen Farbe ausstrahlen, und die allein durch ihre Farbe
und ihre Position zur Warnung, Information oder Leitung von Verkehrsteilnehmern verwendet werden. Sie legt
außerdem die Anforderungen an die optische Leistung, die bautechnische Ausführung und die Betriebskenn-werte
sowie die entsprechenden Prüfverfahren fest. Diese Einrichtungen haben Befestigungsvorrichtungen.
Diese Europäische Norm gilt nicht für Leuchteinrichtungen, die Nachrichten auf irgendeine zusätzliche Weise
übermitteln (z. B. Wechselverkehrszeichen) oder die eine verbindliche Anweisung übermitteln (z. B. Verkehrs-zeichen)
oder die durch Bestimmungen über Fahrzeugscheinwerfer abgedeckt werden.
Diese Europäische Norm behandelt keine horizontalen Lasten wegen der Befestigungen, die nicht
Gegenstand dieser Norm sind, die aber die horizontalen Lasten aufnehmen.

Equipement de régulation du trafic - Feux de balisage et d'alerte

La présente Norme européenne spécifie les exigences pour les dispositifs lumineux électriques individuels, appelés feux d’alerte et émettant une lumière continue ou intermittente régulière monochrome et qui, en raison seulement de leur couleur et de leur emplacement, sont utilisés pour avertir, informer ou guider les usagers de la route. Elle spécifie également les exigences en matière de performances visuelles, structurelles et fonctionnelles, ainsi que les méthodes d'essai correspondantes à utiliser. Pour le montage, ces dispositifs reposent sur les équipements fixes existants.
La présente Norme européenne ne s’applique pas aux dispositifs lumineux qui transmettent des messages par des moyens supplémentaires (par exemple des panneaux à message variable), qui délivrent des instructions obligatoires (par exemple les feux de circulation) ou sont soumis à la réglementation en matière d'éclairage automobile.
La présente Norme européenne ne prend pas en compte les charges horizontales car c’est le support sur lequel les dispositifs sont fixés, lequel n’est pas couvert par la présente Norme européenne, qui doit résister aux charges horizontales appliquées.

Oprema za nadzor in vodenje cestnega prometa - Svetlobne signalne naprave (SSN)

General Information

Status
Published
Publication Date
25-Apr-2006
Current Stage
9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
Due Date
05-Jun-2009
Completion Date
05-Jun-2009

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Traffic control equipment - Warning and safety light devicesOprema za nadzor in vodenje cestnega prometa - Svetlobne signalne naprave (SSN)Equipement de régulation du trafic - Feux de balisage et d'alerteAnlagen zur Verkehrssteuerung - Warn- und SicherheitsleuchtenTa slovenski standard je istoveten z:EN 12352:2006SIST EN 12352:2006en93.080.30ICS:SIST EN 12352:20021DGRPHãþDSLOVENSKI

STANDARDSIST EN 12352:200601-julij-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12352April 2006ICS 93.080.30Supersedes EN 12352:2000

English VersionTraffic control equipment - Warning and safety light devicesEquipement de régulation du traffic - Feux de balisage etd'alerteAnlagen zur Verkehrssteuerung - Warn- undSicherheitsleuchtenThis European Standard was approved by CEN on 27 February 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12352:2006: E

EN 12352:2006 (E) 2 Contents Page

Foreword..........................................................................................................................................................3 1 Scope...................................................................................................................................................4 2 Normative references.........................................................................................................................4 3 Terms and definitions.........................................................................................................................5 4 Requirements......................................................................................................................................7 4.1 Photometric and colorimetric performance......................................................................................7 4.2 Electrical and functional requirements...........................................................................................10 4.3 Construction......................................................................................................................................11 5 Sampling............................................................................................................................................13 6 Test methods.....................................................................................................................................13 6.1 General..............................................................................................................................................13 6.2 Luminous intensity...........................................................................................................................13 6.3 Uniformity of luminance...................................................................................................................14 6.4 Colour of the light of the warning light...........................................................................................14 6.5 On/Off and variable intensity photosensitive switches.................................................................15 6.6 Mechanical strength.........................................................................................................................16 6.7 Flash rate and on-time......................................................................................................................18 6.8 Durability of marks and labels.........................................................................................................19 7 Designation.......................................................................................................................................19 8 Marking, labelling and product information....................................................................................20 8.1 Marking and labelling.......................................................................................................................20 8.2 Product information..........................................................................................................................20 9 Evaluation of conformity..................................................................................................................20 9.1 General..............................................................................................................................................20 9.2 Requirements and test methods for Initial Type Testing...............................................................20 9.3 Requirements for the Factory Production Control.........................................................................25 9.4 Product testing and evaluation........................................................................................................28 Annex ZA (informative)

Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.....................................................................................................29 Bibliography...................................................................................................................................................36

EN 12352:2006 (E) 3 Foreword This European Standard (EN 12352:2006) has been prepared by Technical Committee CEN/TC 226 “Road equipment”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2006, and conflicting national standards shall be withdrawn at the latest by January 2008. This European Standard supersedes EN 12352:2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EN 12352:2006 (E) 4 1 Scope This European Standard specifies the requirements for individual electrically operated light devices, called warning lights, emitting a continuous or regular intermittent light of a single colour which, by their colour and position alone, are used to warn, inform or guide road users. It specifies the requirements for visual, structural and operational performances and the relevant test methods to be used. These devices rely upon existing furniture to provide the mounting. This European Standard is not applicable to lighting devices which convey messages by additional means (e.g. variable message signs) or which convey a mandatory instruction (e.g. traffic signals) or which are covered by vehicle lighting regulations. This European Standard does not consider horizontal loads because it is the mounting to which they are fixed, which is not covered by this European Standard, which has to resist applied horizontal loads. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN

50293, Electromagnetic compatibility — Road traffic signal systems — Product standard EN 60068-2-1, Environmental testing — Part 2: Tests — Test A: Cold (IEC 60068-2-1:1990) EN 60068-2-2, Basic environmental testing procedures — Part 2: Tests — Test B: Dry heat (IEC 60068-2-2:1974 + IEC 60068-2-2A:1976) EN 60529, Degree of protection provided by enclosures (IP code) (IEC 60529:1989) EN 60598-1:2004, Luminaires — Part 1: General requirements and tests (IEC 60598-1:2003 + Corrigendum 2004, modified) CIE 15, Colorimetry CIE 17-4:1987, International lighting vocabulary CIE 39.2, Recommendations for surface colours for visual signalling CIE 54.2:2001, Retroflection — Definition and measurement CIE 69, Methods of characterizing illuminance meters and luminance meters — Performance, characteristics and specifications HD 384.4, Electrical installation of buildings — Part 4: Protection for safety HD 638, Road traffic signal systems Council Directive 73/23/EEC of 19 February 1973 on the harmonization of the laws of Member States relating to electrical equipment designed for use within certain voltage limits

EN 12352:2006 (E) 5 3 Terms and definitions For the purposes of this European Standard, the terms, definitions and units used of CIE 17-4:1987 and the following apply. 3.1 effective luminous intensity effective luminous intensity Ieff for flashing warning lights is that calculated using the Blondell-Rey equation (1): )

( + d)(
= efftt,ttIttI121220∫
(1) t2, t1 are time instants at which I (t)d = Ieff

3.2 horizontal plane (360° warning lights only) plane which passes through the photometric centre of the warning light when the warning light is in its normal operating position 3.3 light emitting surface single continuous area of surface emitting light 3.4 minimum reference luminous intensity IRmin required minimum (effective) luminous intensity, at the nominal voltage, measured on the reference axis or in the reference plane 3.5 minimum area luminous intensity IAmin minimum permissible (effective) luminous intensity, at the nominal voltage, within the area of the specified angle ranges excluding the reference axis or the reference plane NOTE This is expressed as a percentage of IRmin in Table 1. 3.6 maximum area luminous intensity IAmax maximum permissible (effective) luminous intensity at the nominal voltage, measured at any point within the specified in angle ranges including the reference axis or the reference plane 3.7 minimum voltage luminous intensity IUmin minimum permissible (effective) luminous intensity, at the minimum voltage specified by the manufacturer, measured at any point within the specified angle ranges including the reference axis or the reference plane NOTE This is expressed as a percentage of IRmin in Table 1. 3.8 rated voltage voltage of the electrical power supply (battery or mains) as specified by the manufacturer

EN 12352:2006 (E) 6 3.9 photometric centre unless otherwise specified by the manufacturer, the photometric centre is the geometric centre of the area of the light emitting surface 3.10 principal axis (excluding 360° warning lights) horizontal axis which lies on the vertical plane of symmetry of the lens and passes through the photometric centre of the warning light when in its normal operating position 3.11 reference axis (excluding 360° warning lights) unless otherwise specified by the manufacturer the reference axis is the axis of maximum luminous intensity within 2° in any direction of the principal axis 3.12 reference plane (360° lights only) unless otherwise specified by the manufacturer the reference plane is the plane of maximum luminous intensity within 2° above or below the horizontal plane 3.13 on-time (t2 – t1, flashing lights only) part of a single light pulse during which the actual luminous intensity is equal to or greater than the effective luminous intensity NOTE On-time is expressed as a percentage of the complete on/off cycle. 3.14 test module sample of the finished product 3.15 manufacturer party with legal responsibility for placing the product on the market 3.16 supplier producer of components (e.g. fixing devices, optical devices, luminous sources etc.) for the product.

3.17 Factory Production Control (FPC) permanent internal control of production exercised by the manufacturer 3.18 batch quantity of a product manufactured with no change in raw material, equipment, settings or operation as defined in the FPC system of the manufacturer 3.19 individual (and non-series) where manufacturing process is different to the manufacturers usual process

EN 12352:2006 (E) 7 4 Requirements 4.1 Photometric and colorimetric performance 4.1.1 Luminous intensity When measured in accordance with Clause 6, within the angle ranges specified for the relevant class in Table 1, the luminous intensities for warning lights emitting yellow light (C yellow 1 and C yellow 2 as defined in 4.1.4) shall comply with the maximum and minimum limits specified in Table 1. For warning lights emitting red light (C red as defined in 4.1.4) all minimum luminous intensity values shall be reduced to 35 % of those specified in Table 1. Maximum luminous intensity values shall be as specified in Table 1. NOTE 1 In Table 1 warning lights are divided into classes primarily by area of lights emitting surface, angular limits for photometric performance and luminous intensities within those angles. Classes L2, L8 and L9 are sub-divided into High (H), Medium (M) and Low (L) luminous intensity bands within the overall luminous intensity limits for each class. NOTE 2 All the values given for the luminous intensity in Table 1 are given as actual continuous values for steady warning lights and are given as effective luminous intensity for flashing warning lights. Except where limited to a specific Class F designation, shown in brackets, the luminous intensity values given apply to both steady and flashing warning lights in the same L Class. In order to take account of uneven polar luminous intensity distribution for 360° warning lights only, luminous intensities below the minimum values in Table 1 shall be disregarded provided that they are contained within no more than two sectors each of 30° of the full 360°. All angles given in Table 1 shall be measured from the reference plane for 360° warning lights (L1) and from the reference axis for all other warning lights.

EN 12352:2006 (E) 8

Table 1 — Classes of warning lights Luminous intensity Angle ranges Nominal voltage Minimum voltage Class Area of light emitting surface in

cm2 Horizontal Vertical I Rmin in cd I Amin (% of IRmin) I Amax in cd I Umin (% of IRmin) L1 (See 4.1.2) 300° +5° to –5° 1 100 100 50 L2L ≥18 +7° to –7° +7° to –7° 25 25 100 25 L2H ≥18 +7° to –7° +7° to –7° 150 25 1 500 25 L3 ≥75 +10° to –10° +5° to –5° 2 50 100 25 L4(F2) ≥140 +10° to –10° +5° to –5° 43 25 100 15 L5 ≥140 +2° to –2° +2° to –2° 500 25 2 000 25 L6 ≥2 × 250 +10° to –10° +5° to –5° 10 25 100 12,5 L7 ≥250 +10° to –10° +5° to –5° 20 25 100 12,5 L8G ≥250 +7,5° to –7,5° +5° to –5° 25 25 100 12,5 L8L ≥250 +7,5° to –7,5° +5° to –5° 250 25 500 12,5 L8M ≥250 +7,5° to –7,5° +5° to –5° 500 25 1 500 12,5 L8H ≥250 +7,5° to –7,5° +5° to –5°

1 500 25 5 000 12,5 L9L ≥700 +1,5° to –1,5° +1,5° to –1,5° 500 25 2 000 12,5 L9M ≥700 +1,5° to –1,5° +1,5° to –1,5°

2 000 25 8 000 12,5 L9H ≥700 +1,5° to –1,5° +1,5° to –1,5° 20 000 25
40 000 12,5

4.1.2 Light emitting surface 4.1.2.1 For 360° warning lights (class L1) the minimum area of the lens projected in any horizontal direction shall be not less than 30 cm2 and the height of the lens shall be not less than 6 cm. 4.1.2.2 In all other classes (L2 to L9) the total area of the light emitting surface as indicated by the manufacturer shall be not less than the values given in Table 1 and shall comply with the requirements for uniformity of luminance (4.1.3). For the projection of the lens there shall be 2 classes P defined:  class P0: no requirements;  class P1: the projection is a roundel 4.1.3 Uniformity of luminance 4.1.3.1 There is no requirement for uniformity of luminance for warning lights in class L1. 4.1.3.2 The luminance of the light emitting surface of a warning light in classes L2 to L5 inclusive shall be such that, when tested in accordance with 6.3.1 and 6.3.2, the ratio of luminance Iout/Itotal is ≥0,17. 4.1.3.3 The luminance of the light emitting surface of a warning light in classes L6 to L9 inclusive shall be such that when tested in accordance with 6.3.1 and 6.3.3 the ratio of the luminance Lmin/ Lmax is ≥0,07.

EN 12352:2006 (E) 9 4.1.4 Colorimetric performance The class C for the colour of light emitted by warning lights shall be one of the following:  class C red;  class C yellow 1;  class C yellow 2 (for light classes L2 and L5 only). When tested in accordance with 6.4 light emitted from an assembled warning light, fitted with the light source specified by the manufacturer, shall be within the boundaries of chromaticity specified in Table 2. NOTE Warning lights meeting the requirements of class C yellow 1 will automatically meet the requirements of

class C yellow 2. Table 2 — Colours of warning lights Colour of warning light Equation Boundary C red

y = 0,290 y = 0,980 – x y = 0,320 red purple yellow C yellow 1 y = 0,387 y = 0,98 – x y = 0,727 x + 0,054 red white green C yellow 2 y = 0,380 y = 0,940 – x y = 0,500 red white green

4.1.5 Retro-reflective devices All warning lights shall meet the requirements of one of the following three classes R for retro-reflectivity:  class R0: no requirements;  class R1: shall not incorporate retro-reflective areas;  class R2: shall be fitted with retro-reflectors of the colour within the limits of chromaticity specified for

C yellow class 2 in CIE 39.2. When projected in all horizontal directions for warning lights, of class L1 and in the direction of the principal axis for all other warning lights the retro-reflective area shall be at least a minimum of 50 cm2. For all retro-reflective areas the minimum coefficients of retro-reflection R' shall be as specified in Table 3 for ß1 when measured in accordance with CIE 54.2 with ß2 equal to 0.

EN 12352:2006 (E) 10

Table 3 — Coefficients of retro-reflection Entrance angle 1 (2 = 0) Observation angle 12' Observation angle 20' Observation angle

1° 5° 50 cd × lx–1 × m2 35 cd × lx–1 × m2 3 cd × lx–1 × m2 15° 35 cd × lx–1 × m2 20 cd × lx–1 × m2 2 cd × lx–1 × m2

4.2 Electrical and functional requirements 4.2.1 Electrical requirements 4.2.1.1 Electrical safety Warning lights with a supply voltage in excess of 50 V and all warning lights with a lower rated supply voltage, but with parts having a higher voltage than 50 V shall fulfil the requirements of the Low Voltage Directive 73/23/EEC. 4.2.1.2 On/Off and variable intensity photosensitive switches 4.2.1.2.1 General Warning lights may be fitted with photosensitive devices to switch them on and off or to switch them between different levels of luminous intensity in response to ambient light conditions. When tested in accordance with 6.5.3, photosensitive switches shall not be actuated by a vertical plane illumination of 500 lx or less. 4.2.1.2.2 Photosensitive On/Off switches When tested in accordance with 6.5.2 automatic photosensitive switches shall comply with one of the following classes:  class A0: no requirements;  class A1: warning lights fitted with a photosensitive On/Off switch which operates automatically to switch the warning light both on and off within the range of ambient horizontal illuminance (see CIE 69) 250 lx minimum to 1 000 lx maximum. 4.2.1.2.3 Variable intensity photosensitive switch A warning light fitted with a photosensitive device to switch the warning light between operation at different luminous intensities that device shall operate automatically (both to increase and to decrease the luminous intensity) within the range of ambient open air light levels 500 lx minimum to 3 000 lx maximum when tested in accordance with 6.5.2. 4.2.1.3 Voltage indicator (battery operated warning lights only) Where a battery operated warning light is fitted with a device to indicate that the battery voltage is at or ap-proaching the minimum voltage, the voltage indication shall comply with one of the following classes:  class I0: no requirements;

EN 12352:2006 (E) 11  class I1: warning lights fitted with a device to indicate that the specified minimum voltage of the warning light has been reached. 4.2.1.4 Minimum and maximum voltage for mains operated warning lights The operating voltage of mains operated warning lights shall be within the range –15 % to +10 % of the rated voltage. In this voltage range, the warning lights shall comply with 4.1. 4.2.2 Continuity of emitted light and on-time 4.2.2.1 Continuity of emitted light The continuity of emitted light shall comply with one of the following classes:  class F0: no requirement;  class F1: lights emitting a continuous (steady) light;  class F2: lights flashing at a flash rate between 55 flashes per minute and 75 flashes per minute;  class F3: lights flashing at a flash rate between 40 flashes per minute and 80 flashes per minute;  class F4: lights flashing at a flash rate between 120 flashes per minute and 150 flashes per minute. NOTE Lights meeting the requirements of class F2 will automatically meet the requirements of class F3. 4.2.2.2 On-time When tested in accordance with 6.7 the on-time shall comply with the relevant one of the following classes:  class O0: no requirements;  class O1: 30 % < (t2 – t1) ≤ 60 %;  class O2: 10 % < (t2 – t1) ≤ 60 %;  class O3: (t2 – t1) ≤ 10 %. 4.2.3 Electromagnetic compatibility EMC Warning lights shall comply with the requirements of the electromagnetic compatibility specified in EN 50293. 4.3 Construction 4.3.1 Performance under impact (Mechanical strength) Warning lights should be sufficiently robust to withstand use in their intended environment and shall comply with the requirements of one or more of the following classes of performance under impact:  class M0: no requirements;  class M1: warning lights tested in accordance with Impact Test A in 6.6.1;  class M2: warning lights tested in accordance with Impact Test B in 6.6.2;  class M3: warning lights tested in accordance with Impact Test C in 6.6.3;

EN 12352:2006 (E) 12  class M4: warning lights tested in accordance with Impact Test B and impact test C in 6.6.2 and 6.6.3. When warning lights are subjected to any of the above tests, no part of the warning light shall become detached or damaged to such an extent that the device no longer complies with all the requirements of this European Standard however, a failed light source that can be exchanged shall not indicate that the device is considered non-compliant. NOTE 1 Warning lights meeting the requirements of class M1 will automatically meet the requirements of class M2. NOTE 2 Warning lights meeting the requirements of class M4 will automatically meet the requirements of classes M2 and M3. 4.3.2 Weather resistance 4.3.2.1 Ingress of water All warning lights shall have a resistance to the ingress of water of at least IPX4 as specified in EN 60529. After the water splash test the warning light shall operate normally. 4.3.2.2 Temperature resistance The suitability of a warning light for specific climates shall be indicated using the following temperature classes:  class T1: warning lights complying with 4.2.2 of this European Standard when operated continuously at any temperature within the range +55 °C to –10 °C.  class T2: warning lights complying with 4.2.2 of this European Standard when operated at any temperature within the range +55 °C to –40 °C. NOTE Warning lights meeting the requirements of class T2 will automatically meet the requirements of class T1. 4.3.2.3 Corrosion All external metal parts shall be resistant to corrosion in accordance with 4.18 of EN 60598-1:2004. 4.3.3 Secure fastening and locking Warning lights may be fitted with locking devices which prevent access to the internal parts of the warning light (including battery compartment). The locking device shall be such that access without a special tool or key is not possible. Means may also be fitted for securely fastening a warning light to another structure (e.g. a bollard, cone or traffic sign) to support it in its normal operating position. Secure fastening and locking shall comply with one of the following classes:  class S0: no requirement;  class S1: warning lights fitted with a locking device;  class S2: warning lights fitted with fastening means;  class S3: warning lights fitted with both a locking device and fastening means (these may be combined in a single device). NOTE Warning lights meeting the requirements of class S3 will automatically meet the requirements of class S2 and S1.

EN 12352:2006 (E) 13 4.3.4 Passive safety Warning lights shall have no sharp points or edges which could create a hazard for the user during normal handling or when replacing a light source or batteries. Compliance with this requirement shall be checked by visual inspection. 4.3.5 Dangerous substances Materials used in product shall not release any dangerous substances in excess of the maximum permitted levels specified in a relevant European Standard for the material or permitted in national regulations of the Member State of destination. 5 Sampling Two samples of each warning light shall be subjected to initial type testing. 6 Test methods 6.1 General Unless otherwise stated, tests shall be conducted using the nominal voltage and at ambient temperature (20 ± 5) °C. 6.2 Luminous intensity Luminous intensity shall be measured using a photo-detector and a measuring device capable of stable operation and not subject to fatigue when exposed to the maximum level of luminous intensity in Table 1 that it will be required to measure. The combination of detector and measuring device shall have a linear response to light throughout the measurement range up to the relevant maximum level of luminous intensity. The spectral sensitivity of the detector shall closely follow the CIE spectral efficiency curve V () as specified in CIE 69. For this test a battery operated warning light shall be operated at the rated and minimum voltages specified by the manufacturer and as specified in Clause 3. A mains operated warning light shall be operated at 10 % above and 15 % below the nominal voltage specified by the manufacturer. The warning light should be mounted on a goniometer with its photometric centre as close as is reasonably practicable to the rotational centre of the goniometer. Ideally the goniometer should be of a type with a fixed horizontal axis and an adjustable vertical axis (see Figure 1: Type 1, CIE 70:1987) as its angular scale readings will relate directly to the angular values in Table 1. Goniometers with other rotational arrangements may be used but the angular scale settings needed to give compound angles equal to the angles in Table 1 shall then be calculated (see CIE 54.2:2001, Annex B). The measuring distance r is the distance from the photometric centre to the front aperture of the detector and shall be such that the inverse square law is applicable

.rI = E)(2 (2) The angle subtended at the geometric centre of the warning light by the diameter of the detector aperture shall not be greater than 10 min of arc. The luminous intensity values measured shall be within ±5 % of the actual values.

EN 12352:2006 (E) 14 The measured values for angles (for beams within half peak side angles) shall be within the following tolerances: ±0,1° for angles >2° and <4°; ±0,2° for angles ≥4° and <8°; ±0,4° for angles of 8° and above. Sufficient readings shall be taken within the angular limits specified in Table 1 to find the points of both maximum and minimum luminous intensity and record these for each of the test voltages required. 6.3 Uniformity of luminance 6.3.1 The photometric measuring equipment used shall be as specified for the measurement of luminous intensity (see 6.2) and the warning light shall be operated at its nominal voltage only. The test warning light and measuring equipment shall be aligned to measure the luminous intensity on the reference axis or in the reference plane. The total effect of systematic and random error of luminance measurements shall not exceed ±5 %. 6.3.2 The area of the light emitting surface over which the uniformity of luminance is measured is the total area of the light emitting surface as specified by the manufacturer. The first measurement of luminous intensity (Itotal) shall be made with the total area of the light emitting surface exposed. The light emitting surface shall then be partially covered using an opaque disc with a diffuse black surface having a surface area of 50 % ± 2 % of the total area of the light emitting surface. The disc shall be placed in contact with the light emitting surface so that the measurement axis between the photometric centre of the light and the centre of the detector aperture passes through the centre of the disc and is normal to the plane of the disc. The second measurement of luminous intensity (Iout) is made with only the outer part of the light emitting surface exposed. Calculate the ratio of Iout / Itotal and compare with 4.1.3.2. 6.3.3 The area

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