1、 MILDTL28803C 3 September 2013 SUPERSEDING MILDTL28803B 15 January 2003 DETAIL SPECIFICATION DISPLAY, OPTOELECTRONIC, SEGMENTED READOUTS, BACKLIGHTED, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. Th
2、is specification covers the general requirements for displays, optoelectronic, segmented readouts, backlighted through optical filters. 1.2 Classification. Displays shall be of the following styles and types as specified (see 3.1, 6.2 and 6.4). Displays covered by this specification shall be of the
3、following styles as specified (see 3.1). a. Style I: Light source, incandescent lamps. b. Style II: Light source, light emitting diodes. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include
4、 documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4
5、, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these
6、documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MILA8625 Anodic Coatings for Aluminum and Aluminum Alloys. MILDTL28786 Switches, Electrical and Fiber Optic, Packaging of. AMSC N/A FSC 5980Comments, suggestions, or questions on this document should be a
7、ddressed to DLA Land and Maritime, ATTN: VAC, P.O. Box 3990, Columbus, OH 432183990, or emailed to Semiconductordla.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. The documentation
8、and process conversion measures necessary to comply with this revision shall be completed by 3 March 2014. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILDTL28803C 2 DEPARTMENT OF DEFENSE SPECIFICATIONS MILDTL28803/1 Display, Optoelect
9、ronic, Segmented Readout, Backlighted, Style II (Light Emitting Diode), RFI Shielded, Moisture Sealed, High Impact Shock, Type R01. MILDTL28803/2 Display, Optoelectronic, Segmented Readout, Backlighted, Style I (Incandescent Lamps) RFI Shielded, Moisture Sealed, High Impact Shock, Type R02. MILDTL28
10、803/3 Display, Optoelectronic, Segmented Readout, Backlighted, Style I (Incandescent), Dot Pattern And Bar Pattern, RFI Shielded, Moisture Sealed, Type R03. MILDTL28803/4 Display, Optoelectronic, Segmented Readout, Backlighted, Style I (Incandescent), Dot Pattern And Bar Pattern, Type R04 (Replaceme
11、nt Parts For Type R03 Display Assembly) FEDERAL STANDARD FEDSTDH28 Screw-Thread Standards For Federal Services. DEPARTMENT OF DEFENSE STANDARDS MILSTD108 Definitions of and Basic Requirements for Enclosures for Electric and Electronic Equipment. MILSTD202 Electronic and Electrical Component Parts. M
12、ILSTD810 Environmental Engineering Considerations And Laboratory Tests. MILSTD889 Dissimilar Metals. MILSTD1285 Marking of Electrical and Electronic Parts. (Copies of these documents are available online at http:/quicksearch.dla.mil or https:/assist.dla.mil or from the Standardization Document Order
13、 Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related associated specifications, specification s
14、heets, or MS standards), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein an
15、d in accordance with the applicable specification sheets. In the event of any conflict between requirements of this specification and the specification sheets, the latter shall govern (see 6.2). 3.1.1 Displays covered by specification sheets and identified by Part or Identifying Number (PIN). Displa
16、ys which are completely defined by a Department of Defense specification sheet (see 3.1) shall be ordered in accordance with 6.2.1. 3.1.2 Displays covered by specification sheets but not identified by PIN. For displays covered by the specification sheet but not identified by PIN, the type (see 1.2)
17、shall be specified in the complementary document, such as service drawings or ordering data sheets (see 6.2.2). Such displays shall be procured from sources listed on the qualified products list (QPL) for the applicable type. Provided by IHSNot for ResaleNo reproduction or networking permitted witho
18、ut license from IHS-,-,-MILDTL28803C 3 3.2 Qualification. The displays furnished under this specification shall be products which are authorized by the qualifying activity for listing on applicable QPL at the time of award of contract (see 4.4 and 6.3). The variations allowed from the specification
19、sheet, included in 6.2.2 are as follows and must be within the physical, functional, and environments parameters of the specification sheet: a. Character. b. Terminations. c. Characters colors. 3.3 Material. The material for each part shall be as specified herein. However, when a definite material i
20、s not specified, a material shall be used which will enable the displays to meet the performance requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guarantee of the acceptance of the finished product. 3.3.1 Metals. All metal parts, othe
21、r than current-carrying parts, shall be of corrosion resistant material or shall be suitably protected to resist corrosion. 3.3.1.1 Dissimilar metals and compatible couples. When dissimilar metals are used in intimate contact with each other, protection against electrolysis and corrosion shall be pr
22、ovided. The use of dissimilar metals in contact, which tend toward active electrolytic corrosion (particularly brass, copper, or steel used in contact with aluminum or aluminum alloy) is not acceptable. However, metal plating or metal spraying of dissimilar base metals to provide similar or suitable
23、 abutting surfaces is permitted. The use of dissimilar metals separated by a suitable insulating material is also permitted. Dissimilar metals and compatible couples are defined in 3.3.1.2. 3.3.1.2 Intermetallic contacts. The finishing of metallic areas to be placed in intimate contact by assembly p
24、resents a special problem, since intermetallic contact of dissimilar metals results in electrolytic couples which promote corrosion through galvanic action. To provide the required corrosion protection, intermetallic couples are restricted to those permitted by MILSTD889. 3.3.2 Plastic. Unless other
25、wise specified, thermosetting plastics shall be flame retardant material; however, cellulose filled materials shall not be used. When used, thermoplastics shall be self-extinguishing as applicable to the thinnest section. When used in lenses, material shall be as specified (see 3.1 and 6.2). 3.3.2.1
26、 Fiber sheathing. Plasticized polyvinyl chloride shall not be used as a sheathing material for optical fibers. 3.3.3 Finish. Unless otherwise specified (see 3.1) all external aluminum parts shall be anodized in accordance with MILA8625. The exterior surfaces, designed to be exposed at the front of t
27、he panel after assembly, shall have a black lusterless finish. 3.4 Design and construction. The display shall be of the design, construction, temperature range, and physical dimensions as specified (see 3.1). 3.4.1 Mounting hardware. Each display shall be provided with mounting hardware specified (s
28、ee 3.1 and 6.2). For direct Government orders the hardware shall be assembled in proper order. 3.4.2 Housing. The housing shall be capable of independent or combination mounting as specified (see 3.1). 3.4.3 Screw threads. Screw threads on external threaded parts or parts subjected to replacement or
29、 removal, shall be in accordance with FEDSTDH28. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILDTL28803C 4 3.4.4 Termination. Termination shall be as specified (see 3.1). 3.4.4.1 Plug-in units. The plug-in units shall be positive keyed to achiev
30、e proper alignment of legend in relation to fixed assembly when removed (see 3.1). 3.4.5 Weight. The weight shall be as specified (see 3.1 and 6.2). 3.4.6 Light source. The light source shall be as specified (see 1.2, 3.1, and 6.2). 3.4.6.1 Light source circuitry. The light source circuits shall be
31、isolated electrically from the display assembly case and its mounting means. 3.4.6.2 Light source replacement. Light source replacement shall be as specified (see 3.1 and 6.2). 3.4.6.3 Light source contacts. Light source contacts shall be of suitable material or plated to resist electrolytic corrosi
32、on of the contact or the light source base. 3.4.7 Lens. The lens shall be free from defects which will prevent it from meeting luminous distribution and color requirements. Unless otherwise specified, there shall be no highlight reflective surfaces on the displays. 3.4.8 Color filters. Material for
33、lamp color filters (used to convert clear incandescent lamps to colored lighting) shall be silicone rubber, unless otherwise specified (see 3.1). 3.4.9 Panel seals. Material for panel seals shall be silicone rubber. 3.5 Performance. The displays shall be capable of meeting the tests specified in 4.6
34、, and the specification sheets, as applicable. Lamp failure shall not be considered a unit failure when the lamp failure is noted immediately and a new lamp is installed and functions, then the test shall be continued, as required. However, a light source failure for a non-replaceable item (see 3.1)
35、 shall be considered a unit failure. 3.5.1 Visual and mechanical examination. When inspected as specified in 4.6.1, the displays, associated modules and component parts shall conform to the acceptance requirements specified in 3.1, 3.3 (material), 3.4 (design and construction), 3.6 (marking), and 3.
36、8 (workmanship), inclusive. 3.5.2 Operating characteristics. When displays are tested as specified in 4.6.2, the operating characteristics shall be as specified (see 3.1 and 6.2). 3.5.2.1 Character distortion. When displays are tested as specified in 4.6.2.1, the displayed character(s) shall appear
37、clear and legible. 3.5.2.2 Dot-to-dot ratio. When tested as specified in 4.6.2.2 the dot-to-dot ratio shall be as specified (see 3.1). 3.5.3 Optical characteristics. When displays are tested as specified in 4.6.3, the operating characteristics shall be as specified (see 3.1 and 6.2). 3.5.3.1 Chromat
38、icity. When displays are tested as specified in 4.6.3.1 the requirements shall be as specified in table I. 3.5.3.2 Contrast ratio. When displays are tested as specified in 4.6.3.2 the contrast ratio shall be as specified (see 3.1). Provided by IHSNot for ResaleNo reproduction or networking permitted
39、 without license from IHS-,-,-MILDTL28803C 5 3.5.3.3 Field of view. When displays are tested as specified in 4.6.3.3 the visibility of the display shall not be restricted by the periphery of the enclosure for the display. 3.5.3.4 Luminance. When displays are tested as specified in 4.6.3.4 the measur
40、ed photometric brightness in the visible spectrum shall be 10-foot lamberts minimum at rated voltage (see 3.1). TABLE I. Illuminated chromaticity limits. 1/ Color 2100 Kelvin X Y Red .695 .285 .703 SL 2/ .655 .325 .660 SL 2/ Green .260 .570 .300 .630 .160 .660 .200 .720 Yellow .562 .415 .570 SL 2/ .
41、596 .382 .605 SL 2/ White .400 .420 .460 .420 .400 .380 .460 .380 Amber .596 .380 .607 SL 2/ .625 .351 .636 SL 2/ 1/ The chromaticities of the color character expressed as X and Y coordinates on the CIE chromaticity diagram shall be within areas bounded by the coordinates listed for each color, usin
42、g a source illuminate of Kelvin value as stated. 2/ SL = Spectrum locus (where intersected by other coordinate pair). 3.5.4 Physical and mechanical characteristics. 3.5.4.1 Mechanical endurance (applicable to plug-in units only). When displays are tested as specified in 4.6.4.1 there shall be no bre
43、akage of parts or degradation of performance. The removable plug-in unit shall remain capable of removal by normal external pressure. 3.5.4.2 Resistance to soldering heat (when specified (see 3.1 and 6.2). When displays are tested as specified in 4.6.4.2 here shall be no evidence of electrical or me
44、chanical damage. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILDTL28803C 6 3.5.4.3 Solderability (applicable to solderable terminals). When displays are tested as specified in 4.6.4.3 terminals shall be at least 95 percent covered with a new smo
45、oth shiny solder coating. The remaining 5 percent of the terminal surface may show only small pinholes or rough spots. These shall not be concentrated in one area. Bare base metal and areas where the solder dip failed to cover the original coating are indications of poor solder ability. 3.5.4.4 Term
46、inal strength. When displays are tested as specified in 4.6.4.4 there shall be no movement or loosening of parts, or other mechanical damage. 3.5.5 Electrical characteristics. 3.5.5.1 Dielectric withstanding voltage (DWV). When displays are tested as specified in 4.6.5.1 there shall be no flashover,
47、 arcing, breakdown or current flow in excess of 100 microamperes. 3.5.5.2 Life (electrical). Upon completion of tests specified in 4.6.5.2 displays shall meet the dot-to-dot ratio and luminance requirements of 3.5.2.2 and 3.5.3.4, respectively. 3.5.5.3 Overload. When displays are tested as specified
48、 in 4.6.5.3 there shall be no evidence of electrical or mechanical damage. 3.5.6 Environmental characteristics. 3.5.6.1 Moisture resistance. When displays are tested as specified in 4.6.6.1, there shall be no evidence of excessive corrosion, breaking, cracking, or other defects detrimental to the in
49、tended function of the display. When displays are tested in the wet condition, the insulation resistance shall not be less than 10 megohms. At the end of the drying period, the insulation resistance shall not be less than 1,000 megohms. Excessive corrosion is defined as that which interferes with the electrical or mechanical performance and has penetrated the plating and has
