1、SAE-AS81587ADOPTION NOTICESAE-AS81587, “TIMER ASSEMBLY RAIN REPELLENT“, was adopted on20-JUN-00 for use by the Department of Defense (DoD). Proposedchanges by DoD activities must be submitted to the DoD AdoptingActivity: Commander, Naval Air Warfare Center, Aircraft Division,Code 414100B120-3, Highw
2、ay 547, Lakehurst, NJ 08733-5100. Copiesof this document may be purchased from the Society of AutomotiveEngineers 400 Commonwealth Drive Warrendale, Pennsylvania, UnitedStates, 15096-0001. http:/www.sae.org/_Custodians: Adopting Activity:Navy - ASNavy - ASFSC 6630DISTRIBUTION STATEMENT A: Approved f
3、or public release; distributionis unlimited.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 entirelyvoluntary, and its applicability and suitability for any particular use, includ
4、ing any patent infringement arising therefrom, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2000 Society of Automotive Enginee
5、rs, Inc.All rights reserved. Printed in U.S.A.TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS: http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0001AEROSPACE STANDARDAS81587Issued 2000-03Timer Assembly Rain RepellentFSC 6630NOTICEThis document has been taken
6、 directly from U.S. Military Specification MIL-T-81587A(AS), Notice 1 and contains only minor editorial and format changes required to bring it into conformance with the publishing requirements of SAE technical standards. The initial release of this document is intended to replace MIL-T-81587A(AS),
7、Notice 1. Any part numbers established by the original specification remain unchanged.The original Military Specification was adopted as an SAE standard under the provisions of the SAE Technical Standards Board (TSB) Rules and Regulations (TSB 001) pertaining to accelerated adoption of government sp
8、ecifications and standards. TSB rules provide for (a) the publication of portions of unrevised government specifications and standards without consensus voting at the SAE Committee level, and (b) the use of the existing government specification or standard format.Under Department of Defense policies
9、 and procedures, any qualification requirements and associated qualified products lists are mandatory for DOD contracts. Any requirement relating to qualified products lists (QPLs) has not been adopted by SAE and is not part of this SAE technical document.SAE AS81587 - 2 -1. SCOPE:This specification
10、 covers the requirements for an interval timer for controlling the duration of an electrical pulse to a solenoid valve for use in Rain Repellent systems covered by SpecificationMIL-R-81589.2. APPLICABLE DOCUMENTS:2.1 The following documents, of the issue in effect on the date of invitation for bids,
11、 form a part of this specification to the extent specified herein:SpecificationsMilitaryMIL-C-5015 Connectors, Electric, “AN” TypeMIL-E-5272 Environmental Testing, Aeronautical and Associated Equipment, General Specification forMIL-E-5400 Electrical Equipment, Airborne, General Specification forMIL-
12、E-17555 Electronic and Electrical Equipment and Associated Repair Parts, Preparation for delivery ofMIL-R-81589 Rain Repellent Fluid Application System, Aircraft WindshieldFederalPPP-T-0060 Tape, Pressure Sensitive Adhesive-Water ProofStandardsMIL-STD-105 Sampling Procedures and Tables for Inspectio
13、n by AttributesMIL-STD-129 Marking for Shipment and StorageMIL-STD-130 Identification Marking of U.S. Military PropertyMIL-STD-171 Finishing of Metal and Wood SurfacesMIL-STD-454 Standard General Requirements for Electronic EquipmentMIL-STD-461 Electromagnetic Interference Characteristics, Requireme
14、nts for EquipmentMIL-STD-704 Electric Power, Aircraft, Characteristics and Utilization ofMIL-STD-831 Test Reports, preparation ofMS-3102 Connector, Receptacle, Electric Box MountingMS-3106 Connector, Plug, Electric, StraightMS-29527 Valve, Fuel Shut Off, Solenoid Operated 28 Volts DC(Copies of speci
15、fications, standards, drawings and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.)SAE AS81587 - 3 -3. REQUIREMENTS:3.1 Preproduction:This specification makes provision fo
16、r preproduction testing.3.2 Parts and Materials:Approval for the use of non-standard parts and materials other than microelectronic devices shall be based on Category II of Specification MIL-E-5400.3.2.1 Non-Standard Semiconductors: Approval for the use of non-standard and non-preferred semiconducto
17、rs shall be in accordance with Military Standard MIL-STD-454, Requirement 30.3.2.2 Vacuum Tubes: No vacuum tubes shall be used.3.3 Design and Construction:The timer shall be a complete, self-contained unit consisting of an interval timing circuit, electro-mechanical or solid state, a connecting rece
18、ptacle and an enclosure. Design shall conform to the requirements of Specification MIL-E-5400. Workmanship shall conform to Military StandardMIL-STD-454, Requirement 9. Electromagnetic relays shall comply with Military StandardMIL-STD-454, Requirement 57.3.3.1 Weight: The total weight of the timer s
19、hall be a minimum consistent with good design and shall not exceed 0.5 pound.3.3.2 Container: The timing circuit shall be enclosed in an aluminum alloy container cylindrical in form with a maximum outside diameter of 1-3/4 inches and a maximum length of 2-5/8 inches, not including the connector. The
20、 container shall be finished in accordance with Finish Numbers 7.1.1 plus 21.3 of Military Standard MIL-STD-171, Black No. 27038. A 1/4 inch diameter hole may be provided in the container for access to the timer adjustment. The hole shall be covered with pressure sensitive, water-proof, adhesive tap
21、e, Specification PPP-T-0060, Type I, Class I and sealed with one coat of shellac.3.3.3 Operating Power: The timer shall provide the specified performance when energized from a 28 volt d.c. power source with power characteristics conforming to Military Standard MIL-STD-704 for Category B utilization
22、equipment. The electrical load for the timer operation is defined by solonoid valve, Military Standard MS-29527-1.3.3.4 Timing Circuit: The timing circuit shall provide a 28 volt d.c. pulse to a solenoid valve which conforms to Military Standard MS-29527-1. A single timed pulse shall be initiated by
23、 a 28 volt d.c. electrical pulse not longer than 0.5 second duration. The timed pulse from the timer shall be adjustable from 1.0 to 5.0 seconds. The timer adjustment shall be accessible with the timer assembled. The timer shall not be capable of automatic recycling. The timer shall be set by the co
24、ntractor to the time interval specified in the procurement document.SAE AS81587 - 4 -3.3.5 Electrical Connection: The timer shall be equipped with a receptacle conforming to Military Standard MS-3102R-14S-5P in accordance with Specification MIL-C-5015. The receptacle shall be securely attached to th
25、e timer base. Pin connections shall be as shown in 4.4.1.3.3.6 Printed Wiring: Printed wiring to interconnect electronic components shall be in accordance with Military Standard MIL-STD-454, Requirement 17.3.3.7 Soldering: All soldering shall be in accordance with Military Standard MIL-STD-454, Requ
26、irement 5.3.4 Radio Interference:Radio frequency interference shall be controlled within the requirements of Military StandardMIL-STD-461, Equipment Class IIC.3.5 Maintainability:Maintainability shall consist of periodic functional checks and replacement.3.6 Service Conditions:3.6.1 Temperature-Alti
27、tude: The timer shall meet the temperature-altitude requirements of Specification MIL-E-5272, Procedure 1, except that the altitude shall be 70,000 feet, and the upper temperature for storage shall be +95 degrees C.3.6.2 Vibration: The timer assembly shall meet the requirements of Specification MIL-
28、E-5272, Procedure XII without malfunction.3.6.3 Shock: The timer assembly shall meet a shock requirement of 15 gs in accordance with Specification MIL-E-5272, Procedure V without malfunction.3.6.4 Acceleration: The timer assembly shall meet an acceleration requirement of 14 gs in accordance with Spe
29、cification MIL-E-5272, Procedure III without malfunction.3.6.5 Fungus: The contractor shall certify in writing that no nutrients are used in the timer which would support fungus.3.6.6 Explosion Proofing: The timer shall meet the explosion-proof requirements of SpecificationMIL-E-5272, Procedure IV.3
30、.7 Reliability:Reliability shall be stressed by the derating of electronic parts in accordance with Military StandardMIL-STD-454, Requirement 18. Comprehensive configuration control shall be exercised to ensure that production models are identical in every respect with the model that is qualified. T
31、his includes complete documentation of any special component part screening tests necessary to establish component part reliability at a level that will preclude failures during environmental tests.SAE AS81587 - 5 -3.8 Marking:3.8.1 Identification of Product: The timer assembly and parts shall be ma
32、rked for identification in accordance with MIL-STD-130.4. QUALITY ASSURANCE PROVISIONS:4.1 Responsibility for Inspection:Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwi
33、se specified, the supplier may utilize his own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the inspections set forth in the specifications where such inspections are deemed necessary to assure supplies and services conform
34、 to prescribed requirements.4.2 Classification of Tests:The inspection and testing of the timer assemblies shall be classified as follows:a. Preproduction Testsb. Acceptance Tests4.3 Test Procedures:Procedures for performing all tests specified herein shall comply with Specification MIL-E-5400 and b
35、e sent to the procuring activity for approval prior to conducting the tests.4.4 Test Conditions:4.4.1 Test Equipment: The timers shall be connected to the test circuit shown in Figure 1 for testing as specified in 4.5 and 4.6.SAE AS81587 - 6 -FIGURE 14.4.2 Test Conditions: Unless otherwise specified
36、, the timer shall be subjected to the tests under the following conditions:a. Temperature-Room Ambient (23C 10C)b. Atmospheric Pressure - Prevailing room ambientc. Vibration - Noned. Humidity - Room ambient4.5 Preproduction Tests:4.5.1 Preproduction Test Samples: Preproduction test samples shall con
37、sist of samples representative of the production equipment. The contractor shall subject two timer assemblies to the preproduction tests as listed below. The tests shall be performed in the order as shown:SAE AS81587 - 7 -4.5.2 Tests: Preproduction tests shall consist of all the tests specified in 4
38、.8 subject to the test conditions specified herein.4.5.3 Preproduction Test Report: Upon completion of the preproduction tests, the contractor shall prepare a preproduction test report in accordance with Military Standard MIL-STD-831 and furnish three copies to the procuring activity. The test repor
39、t shall include certification that all reliability requirements of 3.7.1 have been met.4.5.4 Preproduction Samples for Procuring Activity: The contractor shall submit to the procuring activity, together with the preproduction test report the two preproduction timer assemblies as specified in 4.5.1 f
40、or use as follows:Examination of Product.For any tests included in this specification, after reviewing the contractors test report.4.6 Acceptance Tests:Acceptance tests shall consist of individual tests and sampling plans and tests.4.6.1 Individual Tests: Each timer shall be subjected to the followi
41、ng tests:Examination of Product 4.8.1Function 4.8.2SAE AS81587 - 8 -4.6.2 Sampling Plan and Tests: The contractor shall select samples in accordance with Military Standard MIL-STD-105D, using Inspection Level I, Acceptable Quality Level (AQL) of 2.5 in Table II-A for a Single Sampling Plan.4.6.3 Sam
42、pling Tests: Following individual tests, selected samples shall be tested as follows:High Temperature Test - Procedure II of Specification MIL-E-5272 and exposed to the high temperature for 4 hours.Low Temperature Test - Procedure II of Specification MIL-E-5272 and exposed to the low temperature for
43、 1/2 hour.Vibration - Procedure III of Specification MIL-E-5272.Function Test - Operational Test per 4.8.2 after sampling tests.4.7 Rejection Criteria:Deterioration in performance of any component which prevents the timer from meeting functional, maintenance and service requirements shall provide ca
44、use for rejection. Changes in timer preset time greater than 25 percent following tests specified herein shall be cause for rejection.4.7.1 Rejection and Retest: Timers which have been rejected may be reworked or have parts replaced only once to correct defects and resubmitted for tests. Before subm
45、itting, full particulars concerning the rejection and action taken to correct the defect shall be furnished the Government Inspector. When one timer from a production run fails, no timers on hand or produced later shall be accepted until the extent and cause of the failure are determined and correct
46、ed.4.7.2 Defects in Timers Accepted: The investigation of a test failure could indicate that defects may exist in timers already accepted. The contractor shall advise the procuring activity of all defects and method of correction.4.8 Test Methods:4.8.1 Examination of Product: The timer assemblies sh
47、all be examined to verify that all the requirements of this specification, including the materials, design and construction, necessary mechanical measurements, markings and workmanship, are met.4.8.2 Function Tests: Each timer assembly shall be connected to the test circuit shown in Figure 1 and ope
48、rated for a minimum of ten (10) cycles by closing the momentary switch for approximately 1/2 second for each cycle. At least one cycle shall be with the timer adjustment set for the minimum pulse (1.0 to 1.3 seconds) and at least one cycle shall be at the maximum pulse duration (4.5 to 5.0 seconds).
49、 Approximately 15-20 seconds should elapse between cycles so as to provide 3 pulses per minute. The pulse duration shall be recorded on the oscillograph. Any timer malfunction or change in pulse time from that specified shall be cause for rejection.SAE AS81587 - 9 -4.8.3 Environmental Tests: The timer assembly for this test shall be connected to the test circuit shown in Figure 1 which shall not be exposed to the test environment. During each environmental test, except at storage temperatures the momentary switch shall be closed for approxim
