1、MILITARY SPECIFICATION RECEIVER, INFRARED (VIEWING SET), AN/SAR-7( ) 1. SCOPE 1.1 This specification covers the design and construction of the Infrared Receiver AN/SAR-7( ), which is intended for use aboard ships at night, for observing near infrared illumination. 2. APPLICABLE DOCUMENTS 2.1 The fol
2、lowing documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. SPECIFICATIONS FEDERAL PPP-B-636 PPP-E-640 MILITARY MIL-E-1 / 1049 MIL-B-18/20 MIL-P-116 MIL-C-675 MIL-S-901 MIL-D-3464 MIL-Q-9858 MIL-F-14
3、072 MIL-E-1 6400 MIL-E-1 7555 - Box, Fiberboard - Boxes, Fiberboard, Corrugated, Triple-Wall - Electron Tube, Image Converter Types 6914 and 69144 - Battery, Dry, BA-42 - Preservation, Methods of - Coating of Glass Optical Elements (Antireflection) - Shock Tests, H.I. (High Impact) Shipboard Machine
4、ry, Equipment - Desiccants, Activated, Bagged, Packaging Use and Static - Quality Program Requirements - Finish for Ground Signal Equipment - Electronic Equipment, Naval Ship and Shore, General Specification - Electronic and Electrical Equipment, Accessories, and Repair and Systems, Requirements for
5、 (Navy) Dehumidification (Navy) Parts, Packaging and Packing of S T. NDARDS MILITARY MIL-STD-105 MIL-STD-108 MIL-STD-129 MIL-STD-781 MIL-STD-785 HANDBOOKS - Sampling Procedures and Tables for Inspection by Attributes - Definition of and Basic Requirements for Enclosure For Electric - Marking for Shi
6、pment and Storage - Reliability Tests Exponential Distribution - Reliability Program for Systems and Equipment Development and and Electronic Equipment Production MILITARY MIL-HDBK-217 - Reliability Stress and Failure Rate Data for Electronic Equipment Provided by IHSNot for ResaleNo reproduction or
7、 networking permitted without license from IHS-,-,-MIL-R-23489A 58 W 9999906 01Ci240 b W (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurenient functions should be obtained from the procuring activity or as directed by the cont
8、ract- ing officer.) 2.2 Other - - publications. - The following dociinients form a part of this specification to the extent specified herein. Unleas othertifie indicated, the issue in effect on bate of invitation for bids or request for proposal 6hd tkpply. KATIONAL BUREAU OF STANDARDS Ilandbook II2
9、8 - Screw-Tlwead Standards for Federal Services (Applicrrtioii for copies shoiilcl be addressed to the Superintendent of Docutncnts, U.S. Government Printing Office, Washington, D.C. 20402.) OFFICIAL CLASSWICATION COMMITTEE Uniform Freight Classification Rules (Application for copies should be addre
10、ssed to the Official Classification Committee, 202 Union Station, 516 Weat Jackson Boulevard, Chicago, Illinois, 60606.) NAVAIR 15-03-500 NAVSHIIS 0967 -125-9010 (Application for copies should be addressed to the Naval Publications and Printing service, Building 157 -3, Washington Navy Yard, Washing
11、ton 20390 (code 074).) 3 = REQUIREMENTS 3.1 First article saniple. Prior to beginning production, n sample shall be tested as specified in 4.3 (see 6.3). 3.2 Cfeiieral reqiiiretneiits. The equipment shall be in accordance with the provisions of MIL-E-1 6400 except as hereinafter specified. 3.2.1 Ten
12、iperature classification. The temperature classification of the equipment shall conform to class 2 of MIL-E-16400 except as hereinafter specified (see 4.5.4). 3.2.2 Power source. The equipment shall be designed to operate from not more than 3 volts direct curiwit (dc) obtained from the enclosed batt
13、ery. 3.2.3 Primary povfer line voltage arid frequency. The primary power line voltage and frequency require- - merits me not applicable. 3.2.4 Service conditions, %he equipment shall be constructed to give optimum performance and reliable service during continuous or intermittent periods of at least
14、 6 months without the necessity for major adjust- ments or SerViCiti shall be 3-3/8 inches long, 4 inches rrinjor outside diameter on one end and 3-7/32 inches minor outside diameter on othep end. Uoiintings shall be externally threaded on smaller end. Threads shall be 2.985 - I6 its-2. Bocal plane
15、shnll be 11 .lo 90.8 -0.0) millimeters from threaded end of barrel. 3.4.3.1.2.1.3 Eyepiece assembly 8.6 power shall be 1-11/32 inches long, 1-13/16 inches in diameter. The 8.6 power eyepiece shdl be assembled iii the eyepiece mount which shall be interchangeable with the 4-povter eyepiece. The eyepi
16、ece shall be attached by a 1.312-32 ES-2 external focusing thread in accordance v:ith IIaiidboolr 1128. The mating interrial thread on the eyepiece inoiint shall be 1 .312 XS-313 in accordance with Hnndbaolc H28. Focal phne shall be 18.42 1.5 millimeters from end. 3.4.3.1.2.1.4 A heavy body silicone
17、 anti-seize compound shall be applied to screw threads used to ncccnible aluminum parts together including fociising threads. 3.4.3.2 Eyeguard cap. The small ocmlar shall be provided with a tnoulded black eyeguard cap of such oiitipe that any cross-sections at right angles to the line of sight will
18、be circular and concentric with the ocular axis. The size and shape of these caps shall be such as to allow the observer to see the entire field of view with the eye in a comfortable position, aid exclude from the eye the major portion of light, except that tsancniitted through the ocular. The inner
19、 surfaces of the caps shall be ridged or corrugated to eliminate stray light. The caps shall be readily removable to facilitate clcaning the exit surface of the eye lens. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-23489AIEC) 3.4.3.3 The
20、main bodies, or housings, shall be die castings, centrifugal castings, permanent mold cast- ings, or extrusions of an aluminum base alloy, or shall be reinforced rigid structures of a corrosion resis- - tant metal, such as Monel or titanium, or glass reinforced melamine or epoxy. Strength and rigidi
21、ty with light weight shall be a major objective. 3.4.3.4 The insulator body, identified as part of assembly A-104 in NAVSHIPS 0967-125-9010 and associated manufacturing drawings shall be of General Electric Lexan polycarbonateresin or an equivalent material acceptable to the Command or Agency concer
22、ned in lieu of polystyrene. 3.4.4 Sensitivity. The viewer shall have a threshold sensitivity value of 0.10 nautical mile candles or better with the most favorable lens combination. The sensitivity shall be measured by a procedure equivalent to the following: A tungsten lamp, operated at a color temp
23、erature of 2850 Kelvin (K.) and filtered by a sheet of Polaroid XRx55 material is used as the source. A variable attenuator, composed of two convex first-surface mirrors, is used to reduce the intensity of the radiation incident on the viewer to the extent that the image of the source in the viewer
24、cannot be seen by a fully dark adapted observer. The illumination which would then be incident on the viewer, were there no filter, multiplied by the filter factor (equivalent infrared transmission) expressed as nautical mile candles, and defines the sensitivity of the viewer. A nautical mile candle
25、 is by definition 2.7777 x 10-8 foot candles. 3.4.5 Resolving power. The minimum resolving power of the viewer shall be 2.5 minutes of arc in the center of the field and not less than 2.5 minutes of arc at any point in a 7.5 degree arc at the center of the field of view. 3.4.5.1 Corona and arcing. D
26、uring the resolution test, the AN/SAR-7( ) unit shall be tested for freedom from arcing and corona (see 4.5.2.1). 3.4.6 Image tube. The infrared image converter tube shall conform to type 6914A of MIL-E-1/1049. 3.4.7 Power supply. The miniature power supply to convert low voltage dc required from ba
27、tteries to the high voltage dc required for the operation of the type 6914A image converter tube shall be contained wholly within the housing of the viewer unit. Since the power supply is an integral part of the hand-held viewing unit the paramount design requirements are miniature size, minimum wei
28、ght, low current drain, and long-term reliability. 3.4.7.1 The power supply shall be designed to operate from one type C-cell dry battery, MIL-Type BA-42 in accordance with MIL-B-18/20. 3.4.7.1.1 The power supply shall operate for 30 hours continuously on one BA-42 dry cell. Battery life shall be me
29、asured to that point where the power supply under a load of one microampere falls below 80 per- cent of the initial output voltage specified in 3.4.7.2. 3.4.7.2 The high voltage power supply shall be a single encapsulated unit with dimensions as follows: Length overall - 2.718 *0.02 inches Diameter
30、- 1.000 *0.01 inches It shall contain a transistor oscillator section, a transformer and a high voltage multiplier section containing silicon diodes and capacitors. The power supply shall have a maximum output voltage of 16,000 volts when fully charged batteries and a load equivalent to a dark type
31、69148 tube are used with the supply. The regula- tion shall be such that the output voltage is between 16,000 and 15,000 volts with any load between 1 x 10-9 amperes and 5 x less than 12,000 volts with a load of 2 x amperes, and shall be not less than 14,000 volts with a-load of 1 x amperes or amper
32、es. 3.4.7.3 Battery compartment. The battery compartment shall be readily accessible for replacement of the battery. It shall be sealed from the interior of the main housing so that opening of the battery compart- ment does not impair the pressure tightness of the interior. The battery cap shall be
33、fitted with an O-ring to make it watertight. The compartment shall be designed so that the battery can complete the circuit only when inserted with the correct polarity 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-2348 9A(EC) 3.4.9.4 jvtit
34、ch. A rotary type of ON-OFF waterproof switch shall be provided. 3.4.8 -. Mountingplate. The viewei- shall be provided with a iiioiinting plate or with grooves to fit the clamp for type C receivers as shown on figure 2. Instructions for making this clamp arc included in the tech- nical manual NAVSII
35、IPS 0969-125-9010. 3.4.9 Carzyitig strap. The vievfer shall be provided vfith a cletacliable binocular type strap for arowid- the-neck carny, The strap shall be of nylon or a similar iiioisture- and fungiisis-resistant iiiatez-id. 3.4.10 Protective cover. A protective cover shall be provided which m
36、ay be fitted over the viewer when mounted on a searchlight. The cavei- shall be vmterproofcd dark gray or black nylon. 3.4.1 1 Construction details. Bue to the high voltage present in this equipment, sharp corners, edges or burrs tending to cause corona shall be smoothed and i*ounded. oron na-inhibi
37、ting compound and potting tech- niques shall be used, as applicable, to reduce corona and to prevent leakage. 3.4.12 Safety featiires and circuit protection. This equipment shall be so designecl and constructed as to eliminate the Iiazard of electrical shock to operating personricl. The circuit arra
38、ngement shall bc desigiied CO a8 to prevent claniage to the equipment due to open OF short circuit of the output terinirials or failure of high voltage leads and co1lliectois, and to protect tI*nnsistors frolii transient high voltages. Safety interlocks ar e not required . 3.4.13 Elovin fuse indicat
39、ors. Blovrii fuse indicators are not required. 3.5 Eiiclosurc?. The main body of the vievrer arid the objective and large eyepieces siiali he watertight to a niiiiitnuni depth of 3 feet of water and airtight in accordance with MIL-STD-108 to a positive or negative pressure of 1 O to 12 poiincis per
40、square inch (psi) referred to the interiok-. The iiousiiigs of the main body and large eyepiece shall be fitted with valve arrnngetiients for flushing aiid filling with dry iitrogcn, Prior to delivery tlicy shall be filled with dry nitrogen to a positive pressure of no less than 5 psi. The residual
41、internal dew point shall be lover than -50 degrees centigrade (c) after filling. _gP 3.6 Finish: The equipnierit and parts, shall be internally finished as follovrs: Aliriiiinuin shall be ano- dized tuid dyed black. Other iiietals shall be primed with a suitable tiietal primer and finished with a fl
42、at blcck enamel. The extenid ppiiniiig coats shall be in accordalice with le enmicl firiished in accordance with type I of MII,-I-14072. 3.9 Carlying case. A carrying case of alutiiiiiutti, fiixxglaes, or of moulcled fungus resistant polyvinyl construction shall be provided. The case siidl have a no
43、ndetachable hinged cover, a handle suitably placed for hancl carry, and cletacchable stmp for ovep-the-shoiilder carry. The case shall accoriniodate arid protect the vievriiig unit, the alternate optics, and one set of spare batteries. The units siiali be securcly fixed vfithin the case wlieii it is
44、 closed but easily removable when the case is opened. The case shall be watertight to 3 feet ldrsstatic pressure and shall withstand the shock test of 4.5.8 without damage to the case or its contento. 3 .i. specified in MIL-S-901 for shock test arid Resilient Mount Data Sheet as specified in ivZIL-E
45、-16400 shall be included iii the report along with evidence of the ability of the equipment to perform its intended function during arid after shock and vibration tests (see 6.2.2). First article approval will not be granted unless the report is eomplete. Any productioii entered iiito prior to appro
46、val of the first article report will be at the siippliers risk, 4.4 mcolifopiiiariee iiiepection 4.4.1 Production inspection. Production inspection shall be made on every equipment offerecl for delivei-y, 1-lall compi*ise such examination and testing as will prove the workinanship and 8 Provided by
47、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE N. Eiivirontiieiital inspection Requirement Test method paragraph paragraph Examination or test Temperature te
48、st Humidity test Shock tcst Battery life test Electromagnetic interference emission and susceptibility and systems self- conipatibility 3.2.1 3.2 3.4.1.2, 3.7 3.4.7.1 3.2 4.5.4 4.5.4 4.5.8 4.5.9 4.5.1 4.4.3.1 Environniental inspection samples, Samples for thc cnvirontnental inspection shall be selec
49、ted (a) One sample from the first 25 production units fabricateci. (b) One sample from each successive 200 units produced, or fraction thereof. withoiit regard to their quality in accordance with the following: 4.4.4 Non-conformance and retest. Jf a sample iinit fails a tcst specified in 4.4.2, 4.4.3 and 4.4.8 the atipplier 6htl iniriicdiately investigate the cause of failure and shall report to the Govermient inspector the reoiihts thereof and details of the corrective actio
