1、1 METRIC I MIL-C-49309(CR) 17 Kay 1989 MILITARY SPECIFICATION COOLER-DEWAR GROUP, OR-336/A9 OR-334/A This specification is approved for use by USACECQM, Department of the k-aiy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specificat
2、ion covsrs only the cooler-Dewar group to be used in the AN/ASQ-170 Target Acquisition Designation Sight (TADS) and the AN/AAQ-11 Pilot Night Vision Sensor (PNVS). 2. APPLICABLE DOCUMENTS 2.1 Government Documents e 2.1.1 Specifications, standards and handbooks. The following specifications, standard
3、s and handbooks form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed En the Department of Defense Index of Specification and Standards (BODISS) and supplement thereto, cited in the solicitation. SPECIFICATIO
4、NS MILITARY MIL-P-11268 i 4- MIL-C-49175 MIL-D-49298 STANDARDS MILITARY - Parts, Materials, and Processes Used in - Cooler, Cryogenic, Mechanical HD-l033B/UA - Detector-Dewar DT-637/U Elect ron ic Equipnen t and HD-l033C/UA MEL-STD-25% - Classiflcatlon of Visual and Mechenteal. Defects for Equipment
5、, Electronic, Wired, and Other Devices AMSC M/A PSC 5855 DISTRIBUTION STATEMENT A. Approved for pub%ic release; distribution ia un$lrni%ed. O THIS DOCUMENT CONTAINS 13 , PAGES. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or netw
6、orking permitted without license from IHS-,-,- _._ flIL-C-q7307 58 7777706 0163372 1 MIL-STB-454 MIL-STB-810 - Environmental Test Methods MIL-STD-2073-2 - Packaging Requirement Codes - Standard General Requirement for Electronic Equipment HANDBOOKS MIL-HDBK-742 - Waste Disposal Methods for Military
7、Packaging Materials (Unless otherwise indicated , copies of federal and military specifications, standards, and handbooks are available from the Naval Publications and Forms Center, (ATTN: NPODS), 5801 Tabor Avenue, Philadelphia, PA 19120-5099.) 2.1.2 Other Government documents, drawings and publica
8、tions. The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein. PURCHASE DESCRIPTION PD-0182-001A(CR) - Cooler, Cryogenic, Long Life One Watt Integral HD-l033D/UA DRAWINGS USACECOM 54490 5am644 - Cooler-Dewar Subassembly,
9、180 Element 54490 5068608 - Mounting Requirements 54490 5008606 - Test Fixture Assembly Microphonics, Standard (Copies of Specifications, standards, drawings, and publications required by contractors in connection with.specific procurement functions should be obtained from the procuring activity or
10、as directed by the contracting officer.) 2.2 Order of Precedence. In the event of a conflict between the text of this specificatton and the references cited herein (except for associated detail specification, specification sheets or MS standards), the text of this specification shall take precedence
11、. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Item Definition. The cooler-Dewar group is a component of the AN/ASQ- 170 TADS and the AN/AAQ-11 PNVS. The group consists of a 180 element infr
12、ared detector-Dewar CDT-637/U), a one watt Cryogenic Cooler (HD-l033B/UA, HD-l033C/UA or HD-l033D/UA), a thermal conductor and associated fastening hardware. requires further alignment prior to installatic1 in TADS/PNVS. This group 2 Copyright Communications - Electronics Command Provided by IHS und
13、er license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-47307 58 m 3777706 0363373 3 m 3.1.1 Cornon module selection. The detector and cooler shall. meet all requirements of their respective sp5cifications and be inspected En accordance with the Q
14、uality Assurance Provisions of these specifications prior to assembly of the cooler-Dewar groups QR-336/A9 QR-337/Aa The gr-oup shall be constructed in accordance wtth drawing 5008644. MIL-B-49298 (CR) Detector-Dewar BT- 6 37 /U Cooler, Cryogenic HB-l033B/UA OR MIL-C-49175B(CW) Mechanical HD-l033C/U
15、A OR Cooler, Cryogenic HD-l033D/WA PB-0182-Q01A(CR) Long Life, One Watt Integral 3.1.2 Thermal conductor. The bellows thermally connecta the cooler cold finger to the detector-Dewar. The thermal conductor shall be deftned on 5008644. approved by the Government. (See 6.2.c). The installation procedur
16、e of the thermal conductor shall be 3.2 Parts9 matertals and processesp general, Parts, materials and processes shall be in accordance with the appbicable drawings. Parts, materials and processes not specified shall. conform to the requirements of MIL-P-11268. 3.2.1 Construction. The cooler-Dewar gr
17、oup shall be constmeted in aceordance with 5088644 o 3.3 First Article. hen spectfled in the cntract the eontrXhr shall furnish first. article assemblies in accordance wb%h 4,4, 3.4 - Performance requlrements. The cooler-Dewar group shall seet the following performance chamcteristles. 3.4.1 Defectiv
18、e elements. Unless othemJ%se speclffed herein, %he detector- Dewar shamted a% $OK (+59 -2OK). nore than 12 defective elements as defined En 6.3. Of the 12 defective eleents no more than 4 my be hab-.d-defekts. In the central. 18 elements of the array there shall be no hard defects and no more than 2
19、 soft defects. The central 36 eLements siia% contain no hard defects and no more than 4 soft defects, A maximum of two hard defects say be located in elements 1-92 and a maximum of on2 anotherp by at least 4 elements and shaXL be e%ectr%ca%ly strapped to an adjacent element with common ground. Soft
20、defects located wfthin the central 36 elements shall be separated fro any other defect by at least 4 non-defective channels. Soft defects shal.1 not be strapped unbesa the strapping bs from an adjacent hard defect at the end of il group of 5 cornonly grounded elements. (See 6.3.4) The de%ec%or-Bewas
21、 shall contain no tWo may be %cated e%elW?ntS 109-1880 article coolers shall. not be considered as part of %he ppocurement quantftbes. TABLE II o First - article inspection. - Bef ect ive elements Detector mfcrophoriies Cooldown time Cooler input power 5 Copyright Communications - Electronics Comman
22、d Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-49309 (CR) k Inspection Requirement Test paragraph paragraph Defective elements 3.4.1 4.6.1 Detector microphonics 3.4.2 4.6.2 Cooldown time 3.4.3 4.6.3 Cooler input power
23、 3.4.4 4.6.4 4.4 Inspection procedures for quality assurance provisions. Unless otherwise specified herein, the cooler-Dewar group shall meet specified performance requirements when operated at an ambient temperature at +230C - + 5OC with detector temperature of 80K + 5K, -20K, and detector bias of
24、+5.0 Vdc + 0.2 Vdc and cooler power of 117 + 2 Vac, 400Hz + 20Hz. - - - 4.5 4.5.1 Inspectio:,. - Inspection shall be as specified in 4.3.1. Quality conformance inspection of equipment before packaging. 4.5.2 Tests. 4.5.2.1 Group A inspection. Group A inspection shall be conducted on all cooler-Dewar
25、 groups. Group A tests listed in Table III may be performed in any order. Failure of any test shall be cause for rejection of that unit. 4.5.2.2 Group B inspection. Not required, 4.5.2.3 Group C inspection. Group C inspection shall be conducted on cooler-Dewar groups selected from units which have p
26、assed the tests in 4.5.2.1. quantity defined in 4.5.2.3.1. The environmental tests of 4.7 shall be performed on a sample 4.5.2.3.1 Sampling for group C inspection. Unless otherwise specified, the sample quantity shall be defined below. selected from units produced during the sampling period, The sam
27、ples shall be randomly MONTHLY LOT SIZE . NUMBER OF UNITS MONTHLY 1-9 10-29 30-UP 1 2 3 4.5.2,3.2 Group C failures. Actions required relative to Group C failures shall be as specified in the contract or purchase order (see 6.2.e). 4.5.2.3.3 Re-inspection of conforming Group C samples. Unless otherwi
28、se apecffied, sample units which have been subjected to and passed Group C inspections my be accepted on the contract or purchase order provided all. visible and known damage is sepaired and the sample units are resubjected ta and pass Group A inspections. 6 Copyright Communications - Electronics Co
29、mmand Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-47307 58 7779906 O163377 O W o Not required. o Unless otherwise specified, the group sha11 be The deteetsr shall be The cooler shall operate from a 117 Vac interconn
30、ected and operated under standard ambient eondftions (temperatures of 23OC -I- 5oC and humldfty not to oxceed 90 percent). operated-at +500 Vdc + 0.2 Vdc. Each detector- element shall be bfased with current flow in the same direction. + 2 Vac, 400 Hz - + 20 Hz power source. - 4.6.1 Defective element
31、s. The detector array shall be checked for continuity using an ohm meter (current limited to 1 mA). Lack of continuity - indicates an opa element and shall constitute failure of the tests. Group A inspection test report on the detector shall be used to verify other requirements of paragraph 3.4.1. T
32、he 4.6.2 Detector microphonics. The cooler-Dewar group shall be mounted to a microphonics test fixture, defined in drawing 5088606, accordance with the mounting requirements defined %n drawing 5008688. All screw/bolt heads shall be torqued in accordance with the requirements specified in drawings 50
33、08608 prior to the test. the duration of the mfcrophontcs test procedure. The detector shall be biased in accordance wfth the requirements of paragraph 3.6.10 of MIL-D-49298(CR). When the detector array reaches an operational temperature between 68 and 80K, the frequency spectral density of each det
34、ector element shall be measured using a noise power spectrum analyzer. electronics/softwase shall be configured and operated to provide a frequency span of O-20,008 Hz, a measurement window (filter) in the Flat Top configuratfon, and a Noise Equivalent Bandwidth of 360 Hz + 10 Hz. A mimimm of 64 sam
35、ples of the frequency spectrum shall be taken andi averaged. The whfte noise reference level of a given detector element shall be determined by averaging the noise on that element from 12,000 to 20,000 Hz with the cooler power applied. Any detector element which fails to meet the requirements of par
36、agraph 3.4.2 shall be considered a failure of this test. The cooler shall be activated and run throughout The spectrum analyzer and any associated 4.6.3 Cooldom %brae. The requtred operating temperature shall be determined by measurtng %he voltage across the temperature sensor #l Installed in the de
37、tector-Dewar wfth a 1 I. environmental tests .of 4.7. The Contractor must order Group A detector inspection reports for use in validation of the requirements of paragraphs 3.4.1 and 4.6.1; Defective Elements, The Contractor must also validate conformance with Group A, C and D inspectfons for both th
38、e Detector-Dewar DT-637/U and the Cooler, Cryogenfc, Long Life per paragraph 3.1.1, Common Moduie selection. hen first article rough handling teats are not required. When first article packaglng fnspectlsn reports requir-e Acqufsition Activity approval prfor to praduct8on unit packing. Specify drawi
39、ng 5808644-1 for #B-l033B/UA, HB-l033C/UA Cooler or 5008644-2 for HB-l033D/Uhle Levels of preservation and packing (See section 5). 6.3 Definitfons. 6.3.1 Damag?. Any breakage, loosening, shifting, evidence of corrosion, failure of any finfsh, hardware, connection OF components, OF any deterforatbn
40、in quality or failure to operate within the specificat$on requirements. 6.3.2 Element. An element fs defined as one channel in the 180 element detector array. O 9 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitt
41、ed without license from IHS-,-,-MIL-(2-49309 (CR) 6.3.3 Inspection lot size. An inspection lot is defined as three months l continuous production or 120 units, whichever comes first, of those groups which have successfully passed Group A inspection. 6.3.4 Strapping. Strapping is defined as electrica
42、lly connecting a defective element to a nondefective element. thus formed, exhibiting 100 percent crosstalk, shall be considered as a single defect. The pair of strapped elements 6.3.5 Defective element. A defective element shall be defined as one which has failed the requirements of 3.6.5, 3.6.5.1,
43、 3.6.6, 3.6.7 and 3.6.14 of MIL-D-49298(CR). A defective element may be classified as either hard or soft. A hard defect is an element; which fails the requirements of 3.6.5.1, 3.6.6, 3.6.7 or 3.6.14 of MIL-D-49298(CR) or which has a 500K blackbody specific dectivity less than 6.0 X 109 cm HzhW-1. T
44、wo elements shorted together are considered one hard defect, A soft defect is one which meets all requirements of 3.6.6, 3.6.7 and 3.6.14 of MIL-D-49298(CR) and has a 500K blackbody specific detec ivity greater than or equal to 6.0 X cm HziW-l, but less than 8.5 X 109 cm Hz P1 6.4 Environmental poll
45、ution preventive. Disposal methods of packaging materials, to prevent environmental pollution, are contained in MIL-HDBK-742, the material specification, or may be obtainei from the preparing activity of the applicable material specification. 6.5 Subject Term Keyword listing. Bellows Cooler Dewar CU
46、STODIAN: Army - CR 10 PREPARING ACTIVITY: Army - CR Project 5855-A298 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-47307 SB 777770b OLb33L 2 POWER SPECTRAL DENSITY g2 /Hz
47、 MIL-C- 49 309 .( CR) .,5.2 10-7 I I I 1 I a FREQUENCY (Hzl NOTES: 1. Curve limiting PSD response to +3 db. 2. The RMS valve ir 3.2q. FIGURE 1. Random vibration. 11 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permi
48、tted without license from IHS-,-,-TEMPERATURE OC FIGURE 2. Cool down curve. 12 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-LI9309 58 W 9399906 0363383 b a 55 WATTS - 50
49、WATTS - -54 c 23 C TEMPERATURE 7loC FIGURE 3. Input power with heat load applied. 13 *U.S. GOVERNMENT PiUNllNC OFFICE: M8) -MIco33/U153 0 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
