SAE ARP 378D-2017 Passenger Reading Lights.pdf

1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there

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3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497

4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/ARP378D AEROSPACE RECOMMENDED PRACTICE ARP378 REV. D Issued 1965-09 Reaffirmed 2011-08 Revised

5、2017-05 Superseding ARP378C Passenger Reading Lights RATIONALE This document is being revised to correct a reference revision level and to clarify an electrical grounding requirement. INTRODUCTION The purpose of this SAE Aerospace Recommended Practice (ARP) is to recommend minimum design criteria wh

6、ich will lead to adequate performance standards for passenger reading lights in aircraft. 1. SCOPE This document presents criteria for design and location of passenger reading lights in commercial aircraft. For LED reading light requirements, see ARP5873, titled: LED Passenger Reading Light Assembly

7、. 2. APPLICABLE DOCUMENTS The following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict betw

8、een the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1 RTCA Publications Available from RTCA, Inc., 1150 18th Street, NW, S

9、uite 910, Washington, DC 20036, Tel: 202-833-9339, www.rtca.org. RTCA Document No. DO-160 Environmental Conditions and Test Procedures for Airborne Electronics/Electrical Equipment and Instruments”, dated July 1984 SAE INTERNATIONAL ARP378D Page 2 of 5 3. DETAIL RECOMMENDATIONS 3.1 Performance 3.1.1

10、 The reading light should provide a uniform circular or square pattern of illumination on a flat inclined reading surface located 203 mm (8 inches) above seat level. The center of the light pattern on the reading surface should be located on the fore and aft centerline of the seat and 533 mm (21 inc

11、hes) from the base of the seat back (see Figure 1). The width of the light pattern should be 457 mm (18 inches). Within the light pattern, the minimum intensity should be 53.8 lux (5 ft-c), and the maximum intensity should be 592 lux (55 ft-c). All intensity measurements should be made with a cosine

12、-corrected illumination meter that is parallel to a horizontal surface oriented normal to the reading light. Figure 1 - Recommended reading light installation SAE INTERNATIONAL ARP378D Page 3 of 5 3.1.2 Recommended illumination levels and patterns are provided in Figure 2. An accurate rated lamp sho

13、uld be used for testing while operating the light at the design or system voltage which may be different from the rated lamp voltage. Accurate rated lamps are selected for their nominal filament position per specification and are calibrated to determine the voltage which produces the rated luminous

14、flux (lumens or mean spherical candela (MSCd). 3.1.3 The reading light should be designed in such a manner so that when the reading plane is oriented normal to the light source (see Figure 1) the intensity of the light falling outside the pattern, the peripheral area beginning at a distance of 76 mm

15、 (3.0 inches) and beyond the specified pattern, will not exceed 16.1 lux (1.5 ft-c). 3.1.4 Should the light be adjustable, adjustment should be restricted, so that no light in excess of 16.1 lux (1.5 ft-c) would fall on the armrests of the adjacent seats or on the back of the seat forward when that

16、seat is fully inclined. 3.1.5 The reading light should be designed so that the light from the lamp will be projected to and confined within the specified limits of 3.1.1. 3.2 Design and Installation 3.2.1 The light and installation should be such that lamps are easily replaceable in flight without t

17、he use of special tools and with a minimum disturbance to passengers. 3.2.2 To ensure uniform lighting and to enable rapid replacement of non-operating lamps, the proper lamp numbers should be easily readable when the lamp is accessed for removal. 3.2.3 The light switch should be easily accessible.

18、Legend, switch actuator shape, and switch location should be chosen to facilitate distinguishing the light switch from the attendant call switch and from light switches for adjacent seats. All switches should be flush or recessed. 3.2.4 The light and installation should be such that the temperature

19、of exposed surfaces is not uncomfortable to the touch. Temperatures of exposed surfaces should not exceed 65.5 C (150 F) with an ambient temperature of 23.9 C (75 F). If surfaces are of a plastic material, slightly higher temperatures may be satisfactory. Downward heat radiation should be minimized.

20、 Heat rejection from the lamp should be controlled such that under continuous operation at maximum voltage and at 21 C (70 F) ambient temperature, components of the fixture will not be warped, discolored, or otherwise damaged, including solder and basing cement used in the lamp. 3.2.5 Reading lights

21、 should be designed and located to reduce glare to a minimum (see Figure 1). It is recommended that the reading light be located no further forward than directly above the center of the passenger reading plane and preferably several inches aft of the centerline of the reading plane. Walls, window fr

22、ames, and overhead surfaces of the passenger cabin should have a light-diffusing finish to minimize glare which might be annoying to adjacent passengers. 3.2.6 The reading light should be designed to meet the recommended light patterns and illumination levels in the intended installation, as specifi

23、ed in Figure 2, even though the distance from the reading light to the reading surface throughout the passenger cabin may vary, i.e., a reading light designed for a short distance (36 inches) would not be recommended for an installation requiring a 72 inch distance. It is not considered necessary to

24、 provide light for reading when the seat is fully reclined. 3.2.7 Incandescent lamps should be operated at not more than 90% rated voltage to extend lamp life. Long life lamps (rated at 2000 hours average lab or more) should be operated at not more than 95% rated voltage. 3.2.8 Ballasts and transfor

25、mers should contain replaceable fuses of other circuit protectors to prevent overheating and smoke. 3.2.9 If the input voltage to the metallic light fixture housing (case) exceeds 30 Vrms or 30 VDC, an electrical ground shall be provided. In any case the electrical return shall not be tied to the ca

26、se. SAE INTERNATIONAL ARP378D Page 4 of 5 Figure 2 - Recommended illumination levels Note: For the above figure R 3.5, R 7.0, R 9.0, R 10.5 and R 13.5 are in inches 7.00, 14.00, 18.00, 21.00 and 27.00 are in inches SAE INTERNATIONAL ARP378D Page 5 of 5 3.2.10 Performance should be determined and tes

27、ting accomplished in accordance with applicable environmental conditions of Radio Technical Commission for Aeronautics (RTCA) Document No. DO-160. 4. NOTES 4.1 Revision Indicator A change bar (I) located in the left margin is for the convenience of the user in locating areas where technical revision

28、s, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY SAE SUBCOMMITTEE A-20C, INTERIOR LIGHTING OF COMMITTEE A-20, AIRCRAFT LIGHTING