1、MIL-S-670VB 63 W 7777906 0236833 i-I = s-u“f- a I-;. MIL-S-6904B 19 April 19E5 SWER3EDING (See Section 6) MILITARY SPECIFICATION SIGNALS, EMERGENCY WARNING, GENERAL SPECIFICATION FOR This specification is mandatory for use by all Deparkments and Agencies of the Department of Defense. 1. S.COPE 1.1 #
2、cope - This specification covers the requirements for aircraft emergency crew warning signais for operation on VUC circuits aboard aircraft. 1.2 Classification - Emergency crew warning signals suitable for operation on 28VDC circuits shall be classified as specified on the applicable specification s
3、heet. 2. APPLICABU DOCUMENTS 2.1 The following documents, of the issue in effect on the date of invitation for bids, or request for proposal, form a part of this specification to the e.xtent specified herein. SPEC IF ICATIONS Military MIL-E-5272 Environmental Testing, Aeronautical and Associated Equ
4、ipment, General Specification for MIL-S-6g04/1 Signai, Emergency Warning (%il) MIL-S-694/2 Signai, Emergency Warning (Horn) MIL- S-6g04/ 3 Signal, Emergency Warning (Horn with a Projector) MIL-S-n42 Screw Threads, Standard, Optimum Selected Series, General Specification for MIL-E-1755 5 Electronic a
5、nd Electrical Equipment and Associated Repair Parts, Preparation for Delivery of Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-S-670qB 63 m 777770-b 023b3q b m MIL-S-6904B Military (Continued) MIL-D-70327 Drawings, Engineering and Associated Li
6、sts Military MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 Marking for Shipment and Storage MIL-STD- i3 O Identification bBrking of U. S. Military Property MIL-STD-704 Electric Power, Aircraft, Characteristics and Utilization of MIL-STD-831 Test Reports; Prepara
7、tion of 33586 Metals, Definition of Dissimilar MS3102 Connectors, Electrical Receptacles, Box Mounting (Copies of specifications, standards, drawings and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed
8、 by the contracting officer. ) 3 -1 Preproduction - The signals furnished under this speci- fication shall be a product which has been tested and has passed the preproduction tests specified herein. 3.2 Precedence - When the requirements of this specification and the applicable specification sheet a
9、re in conflict, the requirements of the Specification sheet shall govern. 3.3 Materials - 3.3.1 Protective treatment - When materials are used in the construction of the signal assembly that are subject to deterioration when exposed to climatic and environmental conditions likely to occur during ser
10、vice usage (see 3.5.10) they shall be protected against such deteriora- tion in a manner that will in no way prevent compliance with the performance requirements of this specification. will crack, chip, or scale with age or extremes of climatic and environ- mental conditions shall be avoided. The us
11、e of any protective coating that 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S -6904B 3.3.2 Metals - Wherever practicable, all metals used in the manufacture of the signal assembly shall be corrosion resistant unless plated or treated to re
12、sist corrosion. especially brass, copper, or steel in intimate metal-to-metal contact with aluminum or aluminum alloy shall be avoided wherever practicable. similar metals are defined in m33586. The use of dissimilar metals, Dis- 3.3.3 Fungusproof materials - Msterials that are nutrients for fungi s
13、hall not be used where it is practicable to avoid them. Where used and not hermetically sealed, they shall be treated with a fungicidal agent acceptable to the procuring activity. hermetically sealed enclosure, fungicidal treatment will not be necessary. However, if they will be used in a 3.3.4 Stan
14、dard parts - Standard parts shall be used wherever Commercial utility parts such as screws, bolts, they are suitable for the purpose, and shall be identified on the drawings by their part numbers. nuts, cotter pins, etc., may be used, provided they possess suitable proper- ties and are replaceable b
15、y the standard parts without alteration, and provided the corresponding standard part numbers are referenced in the parts list and, if practicable, on the contractors drawings. In the event there is no suitable Corresponding standard part in effect on date of invitation for bids, commercial parts ma
16、y be used provided they conform to all requirements of this specif ication . 3.4 Design and construction - 3.4.1 Design - The design of all signals shall be of the lightest and most compct nature consistent with reliable, economical service opera- tion. reassembly for the purpose of repair, replacem
17、ent of parts or adjustment without requiring special tools and fixtures, The signal assembly shall be of sufficiently rugged construction to withstand the mechanical shocks, vibrations, and stresses incident to its use on aircraft. The complete assembly shall be similar to the assembly shown on the
18、applicable speci- fication sheet. The specification sheet covers a representative sample, and assemblies of slightly different design will be considered as meeting the requirements providing the specified and limiting dimensions, mounting holes, connections, and all othey requirements of the specifi
19、cation are met, and preproduction samples are approved. The design shall be reasonably simple to permit disassembly and 3.4.2 Adjustment - The signals shall be so designed and con- structed to provide means for making any necessary adjustments as specified on the applicable specification sheet. 3.4.
20、3 Terminations - The wiring for the signals shall terminate in an electrical connector or terminal posts as specified on the appli- cable specification sheet. 3 -5 Performance - 3.5.1 Operation - When the signal assemblies are tested as speci- fied in 4.6 the operating characteristics shall conform
21、as specified herein and in accordance with the applicable specification sheet. (See 3.2.) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.502 Temperature rise - The signal shall be capable of with- standing continuous operation for the period and
22、 maximum temperature rise specified on the applicable specification sheet. 3.5.3 Starting voltage-operation - The signal shall be designed to operate on 28 volt direct current. meeting the power requirements established between aircraft electric systems and airborne utilization equipment in accordan
23、ce with MIL-STD-704, unless otherwise specified on the applicable specification sheet. The signal shall be capable of 3.5.4 Dielectric strength - The signal assembly shall be so insulated that it will withstand between terminals and other exposed metal parts the applied specified voltage as shown on
24、 the applicable specifica- tion sheet. 3.5.5 Current consumption - The current consumed by the signal when adjusted to produce the required sound intensity shall be as specified in 4.6 and in accordance with the applicable specification sheet. 3.5-6 Sound intensity - The signal shall provide a sound
25、 inten- sity of at least 100 decibels as indicated on a standard sound meter at a distance of 3 feet under conditions encountered in 8 soundproof room (see 4.6) and as specified on the applicable specification sheet. (See 3.5.7.) 3.5.7. Endurance - The Signal shall satisfactorily withstand the life
26、signal test as specified on the applicable specification sheet. (See 4.6.) 3.5.8 Sound frequency - The signal shall provide sound at the Cycling - The cycling of the signal shall be checked as Environmental - The signal shall be capable of operating frequencies specified on the applicable specificat
27、ion sheet. (See 4.6.) 3.5.9 specified 01: the applicable specification sheet. (See 4.6. ) 3 *5 a10 i under the following environmental conditions: Temperatures - bnging from -54“ to +Ti“ C. High temperature - The high temperature test shall be as specified in 4.6 and on the applicable specifica- tio
28、n sheet. Inw temxrature - The low temperature test shall be as specified in 4.6 and on the applicable specifi- cation sheet. Altitude - At a pressure altitude from sea level to 55,000 feet. (See applicable specification sheet .) 4 Provided by IHSNot for ResaleNo reproduction or networking permitted
29、without license from IHS-,-,-MIL-S-b704B 63 = 7779706 0236837 I W MILS-69O4B (e) Relative humidity - Up to 100 percent, including con- ditions wherein condensation takes place in the form of both water and frost. (f) Sand and dust - Exposure to airborne sand an dust prticles encountered in normal an
30、d desert operation. (g) Salt spray - Exposure to salt sea atmosphere. (h) Vibration - Incident to service use. (j ) Explos.ionproofing - Operation in an explosive vapor within or surrounding the equipment. (As specified on the applicable specification sheet. ) 3 -6 Interchangeability - All parts hav
31、ing the same manufacturers part number shall be directly and completely interchangeable with each other with respect to installation and performance. numbers shall be governed by the drawing number requirements of MIL-D-70327. Changes in manufacturers part 3 -7 Dimensions - The signal assembly shall
32、 conform to the dimensions as specified on the applicable specification sheet. 3 -8 Weight - The weight of one signal shall not exceed the value specified on the applicable specification sheet. 3 -9 Screw threads - Screw threads shall be in accordance with MIL-S -7742 3.10 Identification of product
33、- Each signal shall be marked in accordance with MIL-STD-130. 3 .i1 Soldering - No acid soldering flux shall be used in the construction of the assemblies. 3.12 WoriunanshiE - The signal, including all parts and acces- sories, shall be fabricated and finished in a thoroughly workmanlike manner. Part
34、icular attention shall be given to freedom from blemishes, defects, burrs, and Sharp edges; accuracy of dimensions, radii of fillets, thorough- ness of soldering, welding, brazing, painting, wiring, and riveting; align- ment of parts and tightness of assembly screws, bolts; etc. 3.12.1 Riveting - Ri
35、veting operations shall be carefully performed to insure that the rivets are tight and satisfactorily headed. 3.12.2 Cleaning - The signal shall be thoroughly cleaned, and loose, spattered, or excess solder, metal chips, and other foreign material shall be removed during and after final assembly. 5
36、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-6704B b3 W 777770b 0236838 3 W - MIL-S -69O4B 4. QUALIIY ASSURANCE PROVISIONS 4.1 Responsibility for inspection - Unless otherwise specified in the contract or purchase order, the supplier is resp
37、onsible for the per- formance of all inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any commercial laboratory acceptable to the Government. the right to perform any of the inspections set forth in the specification where suc
38、h inspections are deemed necessary to assure supplies and services conform to prescribed requiTements. The Government reserves 4.2 Classification of tests - The inspection and testing of the signals shall be classified as follows: (a) Preproduction tests (see 4.3.). (b) Acceptance tests (see 4.4). 4
39、.3 Preproduction tests - 4,3.1 Sampling instructions - Preproduction test samples shall consist of three signals of each manufacturers part number for which pre- production is desired. Preproduction test samples shall be identified by the manufacturers own part number and any additional identificati
40、on required by the letter of authorization. Samples shall be forwarded to the activity responsible for preproduction, designated in the letter of authorization from that activity. (See 6.2.) If the product is later modified in any way, the modified form shall be subJected to and pass the same prepro
41、duction tests. 4.3.2 Preproduction tests - Preproduction tests shall consist of all of the tests described under 4.6, in accordance with the applicable specification sheet, and shall be performed in the order specified-in Table I for each type of signal assembly. (See 3.2.) TABLE I SAMPLE NO. 1 Exam
42、ination of product Operating test Temperature rise (see specification sheet ) Low-voltage operation Die lec tri c 6 trength Current consumption Sound intensity Endurance Sound frequency cycling High tempemture Low temperature Humidity Sand and dust salt spmy 6 SAMPLE NO. 2 Emmination of product Oper
43、ating test Vibration Explosionproofing (See applicable specifica- tion sheet) SAMPL;E NO. 3 Examination of product Operating test Altitude (see applicable specification sheet) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-690qB 63 W 9999706 0
44、236839 5 W MIL-S-6904B 4.4 Acceptance tests - Acceptance tests shall be performed on signals which have been submitted under contract to determine conformance of the product with requirements set forth in the specification prior to acceptance. The acceptance tests shall consist of the following: (a)
45、 Individual tests. (b) Sampling plans and tests. Individual tests - Each signal shall be subjected to the 4.4.1 following tests : (a) (b) Operating test (see 4.6.2). Examination of product (see 4.6.1). 4.4.2 Sampling plans and tests - 4.4.2.1 Sampling plan A - A sample from each lot shall be selecte
46、d in accordance with MIL-STD-105, Special Inspection Level 5-2, acceptance number zero, and subjected to all the tests of 4.6, as applicable, with the exception of the altitude test of 4.6. has been accepted when tested as specified by 4.4.1 and 4.4.2.1 shall be selected in accordance with MIL-STD-1
47、05, Special Inspection Level S-1, acceptance number zero, subject to the altitude test in accordance with paragraph 4.6.11.3 and the applicable specification sheet (see 3.2). 4.4.2.2 Sampling plan B - A sample of signals from each lot which 4.5 Test conditions - 4.5.1 Standard atmospheric conditions
48、 - Unless otherwise speci- fied tests shall be made at atmospheric pressure (approximately 29.9 c inches Hg) and at room temperature approximately 25 C (77“ F). When tests are made with atmospheric pressure or room temperature differing materially from the above values, proper allowance shall be mad
49、e for the difference from the specfied condition. 4.6 Test methods - 4.6.1 Examination of product - Signal assemblies shall be examined to verify that the materials, design, construction, physical dimensions, marking, and workmanship are in accordance with the applicable requirements (see 3.1, 3.3, 3.4, 3.7, 3 .lo, and 3.12). 4.6.2 characteristics in accordance with the applicable specification sheet (see 3.5.1). Operating test - Signals shall be me
