SAE AS 8036A-2013 Cargo Compartment Fire Detection Instruments《货舱火警探测仪器》.pdf

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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

2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2013 SAE International All rights reserved. No part of this p

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:/www.sae.org/technical/standards/AS8036A AEROSPACE STANDARD AS8036 REV. A Issued 1985-04 Revised 2013-12 Supersedi

5、ng AS8036 (R) Cargo Compartment Fire Detection Instruments RATIONALE The document was revised to incorporate minimum performance standard testing for smoke detector false alarm immunity and to refer to the latest revision of DO-160, revision G. 1. SCOPE 1.1 This SAE Aerospace Standard (AS) specifies

6、 minimum performance standards for the following types of fire detection instruments intended for use in protecting aircraft cargo compartments, galleys, electronic equipment bays and other similar installations. 1.2 Types Type I: Carbon monoxide, an instrument which will actuate an alarm signal whe

7、n the concentration of carbon monoxide in air exceeds a specified value. Type II: Smoke detector, electronic, an instrument operating on the principle of smoke particles modifying the relationship between a light beam and electronic light sensor which will actuate an alarm signal when the concentrat

8、ion of smoke in air exceeds a specified value. Type III: Deleted Type IV: Smoke detector, electronic, an instrument operating on the principle of smoke particles modifying the current in an ionization chamber which will actuate an alarm signal when the concentrations of smoke in air exceeds a specif

9、ied value. Type V: Same as Type IV except maximum operating altitude is 18 000 feet (5486 m) when installed in a non-pressurized area. 2. NORMATIVE REFERENCES The following Standard contains provisions which, through reference in this text, constitute provisions of this Standard. At the time of publ

10、ication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent edition of the Standards indicated below. Members of IEC and ISO maintain registers of currently

11、 valid International Standards. SAE INTERNATIONAL AS8036A Page 2 of 12 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J916 Rules for SAE Use of SI (Met

12、ric) Units 2.2 FAA Publications Available from the Superintendent of Documents, Government Printing Office, P.O. Box 979050, St. Louis, MO 63197. Telephone (202) 512-1800, fax (202) 512-2250. You can also order copies online at www.access.gpo.gov. Select “Access,” then “Online Bookstore.” Select “Av

13、iation,” then “Code of Federal Regulations. 14CFR 25.855 Cargo or baggage compartments14CFR 25.858 Cargo or baggage compartment smoke or fire detection systems. 14CFR Part 25 Appendix F (Testing) AC 21-16G 2.3 RTCA Publications Available from RTCA, Inc., 1150 18th Street, NW, Suite 910, Washington,

14、DC 20036, Tel: 202-833-9339, www.rtca.org. DO-160G Environmental Conditions and Test Procedures for Airborne Equipment 3. GENERAL STANDARDS 3.1 Materials Materials shall be of a quality which experience and/or tests have demonstrated to be suitable and dependable for use in aircraft instruments. 3.2

15、 Workmanship Workmanship shall be consistent with high-grade aircraft instrument manufacturing practice. 3.3 Accessibility of Controls Controls which are not normally adjustable in flight shall not be readily accessible to flight personnel when the instrument is installed in accordance with the manu

16、facturers instructions. 3.4 Interchangeability Instruments which are identified with the same manufacturers part or model number range and/or setting shall be completely interchangeable. 3.5 Integrity Test Means The instrument shall be of such design to provide a means for testing the integrity of t

17、he instrument when the aircraft is operating. SAE INTERNATIONAL AS8036A Page 3 of 12 3.6 Identification The following information shall be legibly and permanently marked on the instrument or attached thereto: a. Name of Instrument b. Manufacturers Part Number c. Manufacturers Serial Number or Date o

18、f Manufacture d. Manufacturers Name and/or Trademark e. Type Number f. Alarm Range and/or Setting g. Rating (Electrical, Vacuum, etc.) h. Qualification Specification Number (SAE or TSO) 3.7 Indication Means The instrument shall be capable of actuating visual and/or aural alarm indicators 3.8 Calibra

19、tion Means An instrument designed to be adjustable shall be such that all calibration means be provided with tamper-proof seals. 3.8.1 Adjustable Detector Systems Instruments which incorporate means for adjustment shall be tested to prove compliance with this Standard. 4. MINIMUM PERFORMANCE REQUIRE

20、MENTS UNDER STANDARD TEST CONDITIONS 4.1 Atmospheric Conditions Unless otherwise specified, all tests required by this Standard shall be conducted at an atmospheric pressure of approximately 29.92 inches (76 cm) of mercury and at an ambient temperature of approximately 25 C (77 F) and at a relative

21、humidity of not greater than 85%. When tests are conducted with the atmospheric pressure or the temperature substantially different from these values, allowance shall be made for the variation from the specified conditions. 4.2 Power Conditions Unless otherwise specified, all tests shall be conducte

22、d at a power rating recommended by the manufacturer. 4.3 Test Position Unless otherwise specified, the instrument shall be mounted and tested in its normal operating position. 4.4 Test Stimulus Measurement 4.4.1 Type I Instrument All carbon monoxide measurements shall be expressed as a percentage of

23、 CO per air volume. SAE INTERNATIONAL AS8036A Page 4 of 12 4.4.2 Type II, Type IV, and Type V Instruments All smoke measurements containing smoke of all colors and particle sizes shall be expressed as a percentage of light transmission. Light transmission percentage is defined as the light falling o

24、n a photo-electric cell (defined in standards UL268 or EN54) through a 1 foot (or 1 m in SI units) distance occupied by smoke particles in air, expressed as a percentage of the light transmitted through 1 foot (or 1 m in SI units) of clear air. A preferred embodiment is a test chamber using a 5 foot

25、 (1.5 m) distance between light source and cell as shown and described in Underwriters Laboratories Inc. Standards UL217 and UL268 (UL Publications Stock, 333 Pfingsten Road, Northbrook, IL 60062-2096). An alternative shall be the smoke tunnel defined in European standard EN54-7. 4.5 Individual Perf

26、ormance Requirements All instruments or components of such shall be subjected to whatever tests the manufacturer deems necessary to demonstrate the production articles comply with this Aerospace Standard including the following requirements where applicable 4.6 Fire Detection In order to demonstrate

27、 that instruments have an adequate fire detection capability, instruments shall be exposed to industry established fire tests. Test fires from UL268 or EN54-7 shall be selected to demonstrate that the detector can successfully detect fire. The test fires in UL268 to be selected are Test B (Wood Fire

28、) and Test C (Flammable Liquid Fire). The test fires in EN54-7 to be selected are TF2 (Smouldering Wood Fire) and TF5 (Flaming Liquid). 4.7 Repeatability To demonstrate its alarm threshold value stability after several tests, the sensor shall be tested as specified in 4.4 six times and alarm thresho

29、ld value measured. Ratio of maximum and minimum measurements shall not be higher than 1.6. 4.8 Response Time and Calibration Each instrument shall be subjected to the response time and calibration tests, listed below, applicable to its type classification. Instruments shall be tested by the applicat

30、ion of appropriate test stimulus (see 4.4). Instruments in which the sensitivity and/or response time is affected by any factors which may be varied from one installation to another shall have tests conducted with the least sensitive and longest response time condition to be used. 4.8.1 Sensitivity

31、Test Unless otherwise specified, air samples shall be as follows: Type I: Air containing 0.020% plus or minus 0.005% of carbon monoxide. Type II, Type IV, and Type V: Air containing smoke, or alternatives described in UL268 or EN54, having a light transmission value of 60 to 99.5% of that of clear a

32、ir measured through a 1 foot (0.3 m) distance as defined in 4.4 which is equivalent to an extinction module with a value between 0.02 and 2.22 db/feet (0.071 to 7.279 db/m). The alarm range and/or setting marked on the instrument shall determine the actual transmission percentage (within 60 to 99.5%

33、) to be used for the test. 4.8.2 Response Time Test Instrument of Types I through V shall be tested so that when an air sample applicable to the type of instrument per 4.8.1 is introduced into the instrument, under standard atmospheric conditions, Type I, Type II, Type IV, and Type V shall actuate a

34、n alarm in the presence of smoke, or alternatives defined in UL and EN, within a maximum time period of 30 seconds. SAE INTERNATIONAL AS8036A Page 5 of 12 4.8.3 Sampling Characteristics When an instrument is designed to sample the air from more than one sampling station on a cycling basis, it shall

35、cycle at a rate sufficient to sample all stations within a total time of 1 minute. The dwell at each station shall be at least twice the response time of the specific model detector being used with the sampler. Response time is that defined in 4.7.2. Flow of air through all the sampling conduits sha

36、ll be maintained continuously. In addition, when a smoke alarm signal is indicated, an alarm signal shall be actuated to indicate the location in which the smoke or gas is being generated and to continue to indicate the alarm signal until the condition is eliminated. It shall begin cycling in a norm

37、al manner within 30 seconds after the alarm signal is cleared. 4.8.4 Differential Pressure Variation The instrument where pressure differential is employed shall be operated continuously by varying the pressure differential from 25% below to 25% above the rated. At each of these values the instrumen

38、t shall meet the requirements of 4.8.2. 4.8.5 Saturation Characteristics The unit shall not revert to “no smoke“ signal condition following an alarm indication when held immersed in smoke levels at least 25% greater than the response level for the unit for a period of 10 hours. The unit shall revert

39、 to a “no smoke“ signal condition within 15 minutes after the smoke level is reduced to 50% of the original response level. 4.9 Dielectric Each instrument shall be tested by the methods of inspection listed in 4.9 and 4.10. 4.10 Insulation Resistance The insulation resistance measured at 200 V DC fo

40、r 5 seconds between all electrical circuits connected together (except electrical case ground) and the metallic case shall not be less than 5 M. Insulation resistance measurements shall not be made to circuits where the potential will appear across elements such as windings, resistors, capacitors, e

41、tc., since this measurement is intended only to determine adequacy of insulation. 4.11 Overpotential Tests Equipment shall not be damaged by the application of a test potential between electrical circuits and between electrical circuits and the metallic case. The test potential shall be a sinusoidal

42、 voltage of a commercial frequency with an RMS value of five times the maximum circuit voltage or per 4.10.1. The potential shall start from zero and be increased at a uniform rate to its test value. It shall be maintained at this value for 5 seconds and then reduced at a uniform rate to zero. Since

43、 these tests are intended to assure proper electrical isolation of the circuit components in question, these tests shall not be applied to circuits where the potential will appear across elements such as windings, resistors, capacitors, etc. 4.11.1 Circuits that operate at potentials below 15 V are

44、not to be subjected to overpotential tests. SAE INTERNATIONAL AS8036A Page 6 of 12 5. MINIMUM PERFORMANCE STANDARDS UNDER ENVIRONMENTAL CONDITIONS Unless otherwise specified herein, the measurement procedures applicable to a determination of the performance under environmental conditions are set for

45、th in Radio Technical Commission for Aeronautics (RTCA Document No. DO-160G entitled “Environmental Conditions and Test Procedures for Airborne Electronic/Electrical Equipment and Instruments,“ dated 10th December 2010). Performance tests which must be made after subjection to test environments may

46、be made after exposure to several environmental conditions. The order of tests must be in accordance with paragraph 3.2 of DO-160G. The test procedures specified or referenced are satisfactory for use in determining the performance of fire detection instruments under normal and extreme environmental

47、 conditions; equipment category is to be as specified by the manufacturer. Alternate approved test procedures that provide equivalent results may be used. As many instruments as deemed necessary to demonstrate that the instruments comply with the requirements of this section shall be tested in accor

48、dance with the manufacturers recommendations. After the tests have been initiated, further adjustments to the instrument shall not be permitted. Note that compliance by similarity or by analysis are accepted means of compliance to the standards in this specification. A false alarm signal occurring d

49、uring any of the tests shall disqualify the instrument from further testing. 5.1 Temperature, Altitude, Decompression, and Overpressure 5.1.1 Temperature When installed in accordance with the manufacturers recommendations, the instrument shall function over the range of ambient temperatures appropriate for the intended application. The equipment shall comply with DO-160G Section 4 and the test Category shall be defined by the equipme