1、INCH-POUNDMIL-DTL-7961D 16 January 2007 SUPERSEDING MIL-L-7961C 24 December 1993 MILITARY SPECIFICATION LIGHTS, INDICATORS, PRESS TO TEST This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers functional, sel
2、f-testing, press to test indicator lights. 1.2 Classification. Light assemblies shall be of the following classes as specified (see 6.2). Class 1 - Light, Indicator Press to Test, Small (MS25041-1 to -13). Class 2 - Light Assembly, Press to Test Indicator (MS25331-1 to -0). 2. APPLICABLE DOCUMENTS 2
3、.1 General. The documents listed in this section are specified in section 3, 4, or 5 of this standard. This section does not include documents cited in other sections of this standard or recommend for additional information or as examples. While every effort has been made to ensure the completeness
4、of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this standard, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications and standards f
5、orm a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-A-8625 Anodic Coating for Aluminum and Aluminum Alloys MIL-DTL-6363/8 Lamps, Incandescent, A
6、ircraft Service, Single Contact Midget Flanged Base T-1-3/4 Bulb. Comments, suggestions, or questions on this document should be addressed to Defense Supply Center Philadelphia (DSCP), ATTN: DSCP-NASA, 700 Robbins Avenue, Philadelphia, PA 19111-5096 or e-mail to dscpg however, final acceptance and s
7、hipment shall be withheld until the inspections have shown that the corrective action was successful. In the event of failure after reinspection, information concerning the failure shall be furnished to the cognizant inspection activity and the procuring activity. 4.4.5 Disposition of samples. Sampl
8、es which have been subjected to the first article inspection shall not be delivered to the Government on contract or purchase order, unless a specific exception has been granted by the cognizant procuring activity. 4.5 TEST METHODS AND EXAMINATIONS. 4.5.1 Examination of product. Each light assembly
9、shall be inspected or examined to determine compliance with the requirements specified herein with respect to design and construction, materials, markings, and workmanship. 4.5.1.1 Operation. The light assemblies shall be tested for operation by installing the specified lamp and applying the design
10、voltage (28 Vdc) across the terminals. The press to test feature shall also be tested for operation. If the light has the dimmer feature, the dimmer shall also be tested for operation. Failure of any component (exclusive of the lamp) of the light assembly during the test shall be cause for rejection
11、. 4.5.2 Environmental. The light assemblies shall be subjected to the following tests in accordance with the specified procedures of MIL-STD-810 and as specified herein. Upon completion of each test, any damage which would affect the operation or cause malfunction of the unit shall be cause for reje
12、ction. Unless otherwise specified the assemblies shall be mounted on a panel that will allow the indicator circuit to be energized to 28 Vdc for all tests. 4.5.2.1 Fungus. The light assemblies, non energized, shall be subjected to fungus in accordance with Method 508.5, MIL-STD-810. Evidence of exce
13、ssive fungi growth or malfunctioning of the assemblies shall be cause for rejection. 4.5.2.2 Humidity. The light assemblies, non energized, shall be subjected to relative humidity of 100 percent, including conditions wherein condensation takes place in the form of both water and frost, in accordance
14、 with Method 507.4, MIL-STD-810, for a period of 10 cycles. Any loosening or deformation of parts or discoloration of the lens during this test shall be cause for rejection. 4.5.2.3 Salt fog, The Light assemblies, non energized, shall be subjected to salt fog for a period of 100 hours in accordance
15、with Method 509.4, MIL-STD-810. Evidence of excessive corrosion or malfunctioning of the assemblies shall be cause for rejection. 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-7961D 4.5.2.4 Altitude. The light assemblies shall be subjected
16、 to altitude in accordance with Method 500.4, Procedure II, MIL-STD-810, except that the ambient temperature shall be -73C and a pressure altitude ranging from 30 inches Hg down to 3.4 inches Hg (approximately an altitude of 70,000 feet). The assemblies shall be connected for operation on a 28 Vdc c
17、ircuit, but shall not be energized during a soak period of not less than one (1) hour for stabilization of the temperature. After the soak period and at the required test conditions, the assemblies shall be cycled four (4) times with 5-minute on and 5-minute off periods. 4.5.2.5 Low temperature. The
18、 light assemblies, non energized, shall be subjected to basic cold temperature in accordance with Method 502.4, Procedures I the number of samples to be inspected as specified in 4.3; and (when applicable) the specific tests to be performed on each sample. The contracting officer should also include
19、 specific instructions in acquisition documents regarding arrangements for examinations, approval of first article test results, and disposition of first articles. Invitations for bid should provide that the Government reserves the right to waive the requirement for samples for first article inspect
20、ion to those bidders offering a product which has been previously acquired or tested by the Government, and that bidders offering such products, who wish to rely on such production or test, must furnish evidence with the bid that prior Government approval is presently appropriate for the pending con
21、tract. Bidders should not submit alternate bids unless specifically requested to do so in the solicitation. 6.4 Definition. For purposes of defining various types of defects or terminology which is referred to in this specification, the following definition will apply: Amplitude - Amplitude is defin
22、ed as the total movement measured from one extreme position to the opposite extreme position. 6.5 Subject term (key word) listing. Indicator, light assembly Light assembly, press to test Light assembly, Indicator Press to test light assembly Dimmer light assembly 6.6 Changes from previous issue. Ast
23、erisks or vertical lines are not used in this revision to identify changes with respect to the previous issue due to the extensiveness of the changes. 8Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-7961D Custodians: Preparing activity: Navy
24、 -AS DLA -IS Army - CR4 Air Force - 99 (Project 6210-2006-011) Review activities: Army - AR, AV, MI Navy - SH NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change. You should verify the currency of the information above using the ASSIST online database at http:/assist.daps.dla.mil. 9Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
