1、2.1 Government documents. 2.1.1 Specifications, standards and handbooks. The following specifications, standards 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 in the issue of the Departm
2、ent of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. MIL-P-70944 (AR) 30 July 1990 MILITARY SPECIFICATION PANEL ASSEMBLY, FRONT: 12922129 This specification is approved for use within the U.S. Army Armament, Munitions and Chemical Command a
3、nd is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the requirements for manufacture and acceptance of the Front Panel Assembly, used in the M90 Radar Chronograph (See 6.1). 2: APPLICABLE DOCUMENTS SPECIFICATIONS MI
4、LITARY MIL-F-13926 - Fire Control Materiel, Manufacture and Inspection, General Specification for MIL-P - 14 2 32 - Parts, Equipment and Tools for Army Materiel, Packaging of MIL-F-23419/9 - Fuse, Cartridge, Instrument Type, Style FM09M (Nonindication) MIL-C-26482 - Connector, Electrical (Circular,
5、Miniature, Quick Disconnect, Environment Resisting) Receptacles And Plugs, General Specification for Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document, should be addressed to: Commander, U.S. Army ARDEC, ATTN: SMCAR-BAC-
6、Sf Picatinny Arsenal, New Jersey 07806-5000 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 1290 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHS
7、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70944 (AR) MIL-1-45607 - Inspection Equipment, Acquisition, Maintenance and Disposition of STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes MIL-STD-109 - Quality Assur
8、ance Terms and Definitions MIL-STD-454 - Standard General Requirements for Electronic Equipment MIL-STD-2164 for Electronic Equipment. - Environmental Stress Screening Process (Unless otherwise indicated, copies of federal and military specifications, standards and handbooks are available from: Stan
9、dardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.1.2 Other Government documents, drawinqs and publications. The following other Government documents, drawings and publications form a part of this specification to the extent specified herein. Unless othe
10、rwise specified, the issues shall be those in effect on the date of the solicitation. DRAWINGS (See 6.4) U.S. ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING CENTER (ARDEC) 12922105 - EM1 Test Procedure 12922119 - Front Panel, Schematic Diagram 12922129 - Front Panel, Electronic Assembly 1292222
11、5 - Environmental Test Methods SPECIAL PACKAGING INSTRUCTIONS Pl2922129 7 Special Packaging Instruction for the Front Panel Assembly (Copies of drawings, publications, and other Government documents required by the contractors in connection with specific acquisition functions should be obtained from
12、 the contracting activity or as directed by the contracting activity.) the text of this specification and the references cited herein, the text of this specification shall take precedence. 2.2 Order of precedence. In the eveht of a conflict between Nothing in 2 a 1 a: Provided by IHSNot for ResaleNo
13、 reproduction or networking permitted without license from IHS-,-,-b a this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 General description. The Front Panel Assembly is an interface unit used to control th
14、e M90 Radar Chronograph and to display measured projectile velocity. 3.2 Materials. The materials shall be in accordance with the applicable drawings and specifications. 3.3 Components and assemblies. The components and assemblies shall comply with all requirements specified on Drawing 12922129, all
15、 associated drawings, and with all requirements specified in applicable specifications and standards. Where applicable, the Panel Assembly shall meet the requirements of MIL-F-13926 and MIL-STD-454 as follows : a. Dimensions and tolerances b. Inorganic protective surface finishings c. Part identific
16、ation and marking d. Workmanship e. Soldering electrical connections 3.4 Performance. The Panel Assembly contains three connectors with rubber waterproof covers, two D-type connectors, three rotary switches, one toggle switch, two pushbutton switches, two light indicators, one Light Emitting Diode d
17、isplay and one fuse. 3.4.1 Power. Toggle switch shall be designated as S1. When in ON position the following pins of connectors J1 and J4 shall be connected: J1-A, J1-E, J4-3, 54-14, 54-15, 54-16 and 54-26. 3.4.2 Fuse. Protection fuse - 3 Amp, 250 V in accordance with MIL-F-23419/9. 3.4.3 Interconne
18、ctions. The interconnections shall be in accordance with Drawing 12922119. 3.4.3.1 Input power. Input power connector shall be designated as J1. Connector type MS3124E-14-5P of MIL-C-26482, shall be located on the front side of the Panel Assembly. 3.4.3.2 Antenna interconnect. Connector type MS3124E
19、-14-5SY of MIL-C-26482, shall be located on the front side of the Panel Assembly, designated as J2. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70949 12 9999906 0950581 T MIL-P-70944 (AR) 3.4.3.3 Data output. Connector type MS3124E-22-55S
20、 of MIL-C-26482, shall be located on the front side of the Panel Assembly, designated as J3. 3.4.3.4 Connector J4. Connector type M24308/2-5 of MIL-C-26482 , shall be located on the rear side of the Panel Assembly. 3.4.3.5 Connector J5. Connector type M24308/2-15 of MIL-C-26482, shall be located on
21、the rear side of the Panel Assembly. 3.4.4 Caliber. A 4 position rotary switch shall be designated as S2, and shall be located on the front side of the Panel Assembly. At each position, the following pins of 53 and J5 shall be connected to panel ground in accordance with TABLE I. TABLE I - Caliber s
22、witch operation SWITCH DESIGNATION GROUNDED POSITION ON THE PANEL PINS I 1 I 105 I NONE I I 2 I 155 I J5-10,J3-m I I 3 I 175 I J5-43,J3-X I I 4 I 203 I J5-43,J5-10, I I I I J3-X ,J3-m I 3.4.5 Expected velocitv. A 12 position rotary switch shall be designated as S3, and shall be located on the front
23、side of the Panel Assembly. At each position, the following pins of J3 and J5 shall be connected to panel ground in accordance with TABLE II. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70944 (AR) TABLE II - Expected velocity switch opera
24、tion SWITCH DESIGNATION .GROUNDED POS IT I ON ON THE PANEL PINS I 1 I DATA UNIT TEST I NONE .I I l I I I I I I I I I I I I I I I I I I I I 2 3 4 5 6 7 8 9 10 11 12 I l I I I I I I I I I I I I I I I I I I I I I I 150-300 I J5-4O,J3-2 300-400 400-500 500-600 600-700 700-800 800-900 goo-iooo 2000-1100
25、1100-1250 SYSTEM TEST J5-5, J3-GG J5 -4 O, J5 -5, 53-2, J3-GG J5-3 8, J3-HH J5-3 8,J3 -HH J5 -4O,J3 -2 55-3 8, J3-HH 55 -5,J3 -GG J5-38,55-5,55-40 I J3 -HH, J3 -GG, I 53 -2 55-4, J3-CC I J5-4, J3-CC I J5-40,J3-2 I J5-4, J3-CC I J5 -5,J3 -GG I I J3-CC, J3-GG, I 1 53-2 I J5-4,J5-5, J5-40 I 3.4.6 Data
26、display. 9 positions rotary switch shall be designated as S4, and shall be located on the front side of the Panel Assembly. At each position, the following pins of J3 and J5 shall be connected to panel ground in accordance with TABLE III. 5. Provided by IHSNot for ResaleNo reproduction or networking
27、 permitted without license from IHS-,-,-MIL-P-70944 12 m 9997906 0450583 3 MIL-P-70944 (AR) TABLE III - Data display switch operation SWITCH DESIGNATION GROUNDED POS IT ION ON THE PANEL, PINS I 1 I Mv I NONE I I I 2 I I 3 I I 4 I I 5 l I 6 I I 7 MV1 MV2 MV3 Mv4 Mv5 MV6 I I J5-3 9, J3-S J5-6, J3-T 55
28、 -3 9, J5 - 8, J3-S, J3-T 55-7, J3-U 55-7, J3-U 55-3 9,J3 -S 55-7, J3-U I I I I I I I I I I I I I 155-6, J3-T I I 9 I . AVG 1 J5-41, J3-E I I 8 I Mv7 I J5-71J5-6rJ5-39 I I I I J3-U, J3-T, J3-S I 3.4.7 Press before fire (PBF). Pushbutton switch shall be designated S5, and shall be located on the fron
29、t side of the Panel Assembly. When released, the normally-closed contacts shall connect the panel ground to J5-65 and to J3-y. When pressed shall connect the panel ground to J5-29 and to J3-5. 3.4.8 Clear memory. Pushbutton switch shall be designated as S6, and shall be located on the front side of
30、the Panel Assembly. When pressed shall connect the panel ground to 55-44 and to J3-H. 3.4.9 Standby. Yellow indicator lamp shall be designated as DS1 and shall be rated 28 VDC maximum and 40- maximum. DS1-1 shall be connected to 55-32 and 53-2. DSI-2 shall be connected to 54-10. 3i4.10 Ready. Yellow
31、 indicator lamp shall be designated as DS2 and shall be rated 28 VDC maximum and 40mA maximum. DS2-1 shall be connected to J5-69 and J3-Y. DS2-2 shall be connected to J4-10. 3.4.11 Display. The display shall consist of six Display Elements, designated from left to right as U1, U2, U3, U4, U5 and U6.
32、 The DISPLAY shall have the following characteristics: 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70944 (AR) 3.4.11.1 Display power. The power consumption shall be: 4.5 The positive supply shall be connected to 7 VDC, 1.02 AMP max. conne
33、cted to the chassis. to 54-27. The DISPLAY UNIT ground shall be 3.4.11.2 Display data. Four bit binary coded data shall be connected to the Panel Assemb1.y as follows: D3 : 53-g ,J5-47 (most significant) D2 : 53-b ,J5-13 Dl : 53-c ,55-2 DO : 53-1 ,J5-36 (least significant) connected to J3-g, 55-37,
34、and shall be active high. LATCH input, activated at the high to low transition. The connections shall be as follows: 3.4.11.3 U1 blankinq. Blanking signal to U1 shall be 3.4.11.4 Display latch. Each Display Element shall have a Display Element Latch input Pins u1 u2 u3 u4 u5 U6 53 -E, 55 -52 J3-f, J
35、5-14 J3-K, 55-5 O J3-M, 55-15 53 -hl 55 -3 J3-5, 55-8 3.4.11.5 Hexadecimal display. The left Display Element U1 shall be a hexadecimal digit, with the truth table in accordance with TABLE IV. DO,Dl,D2,D3 as in 3.4.11.2. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
36、icense from IHS-,-,-MIL-P-70749 12 a 7799706 0450585 7 m MIL-P-70944 (AR) TABLE IV - Truth table for hexadecimal display element 3.4.11.6 Numeric display. The 5 right Display Elements U2 to U6 shall be numeric digits, that represent a decimal number consisting of four digits for the integer portion
37、of the number and one digit for the fraction. A constantly illuminated decimal point at the right of U5, shall separate the integer and fractional portions of the number. The truth table given in TABLE V describes the operation of each Display Element U2 through U6 . 8 Provided by IHSNot for ResaleN
38、o reproduction or networking permitted without license from IHS-,-,-MIL-P-70944 (AR) TABLE V - Truth table for numeric display elements . 3.4.12 Harness. A harness shall provide the interconnections required in 3.4.1 to 3.4.11 and in accordance with the requirements of Drawing 12922119. 3.5 Environm
39、ental requirements. 3.5.1 Hish temperature. The Front Panel Assembly shall meet the requirements of 3.3 and 3.4 when thermally stabilized at +125 degrees F. The Front Panel Assembly when subjected to storage temperature of +150 degrees F shall meet the requirements of 3.3 and 3.4 when returned and t
40、hermally stabilized at ambient temperature. 3.5.2 Low temperature. The Front Panel Assembly shall meet the requirements of 3.3 and 3.4 when thermally stabilized at -50 degrees F and when returned and thermally stabilized at ambient temperature. 3.5.3 Solar Radiation. The Front Panel Assembly shall m
41、eet the requirements of 3.3 and 3.4 after being subjected to 355 BTU per square foot. 3.5.4 Humiditv. The Front Panel Assembly shall meet the requirements of 3.3 and 3.4 after being subjected to 240 hours at a relative humidity of 94 +/-5 percent from +68 degrees F to +125 degrees F. 3.5.5 Vibration
42、. The Front Panel Assembly shall meet the requirements of 3.3 and 3.4 after being subjected to vibration, having a double amplitude of 1.0 inch, from 5 to 6.5 HZ and acceleration level of 2 Gs over the 6.5 to 200 HZ frequency 9 Provided by IHSNot for ResaleNo reproduction or networking permitted wit
43、hout license from IHS-,-,-MIL-P-707q4 12 W 7777706 0450587 O MIL-P-70944 (AR) range for a 15-minute duration in each of its three mutually perpendicular axes. 3.5.6. Altitude. The Front Panel Assembly shall meet the requirements of 3.3 and 3.4 after being subjected to an altitude of 10,000 feet in o
44、perational mode and after exposure at an altitude of 50;OOO feet in nonoperational mode. 3.5.7 Rain. The Front Panel Assembly shall meet the requirements of 3.3 and 3.4 after being subjected to a 2.0 inch per hour, 20 mile per hour wind driven rain. 3.5.8 Salt foq. The Front Panel Assembly shall mee
45、t the requirements of 3.3 and 3.4 after being subjected to 48 hours of continuous exposure to a 5 percent salt solution with a specific gravity of 1.027 to 1.034, a PH of 6.5 to 7.0 and a temperature of 95 degrees F. requirements of 3.3 and 3.4 after being subjected to 36 hours of exposure to wind d
46、riven sand and dust. 3.5.9 Sand and dust. The Front Panel Assembly shall meet the 3.5.10 Funqus. The Front Panel Assembly shall meet the requirements of 3.3 and 3.4 after being subjected to 28-day fungus exposure to a composite spore suspension. 3.5.11 Environmental stress screeninq (ESS) temperatur
47、e. The Front Panel Assembly shall meet the performance requirements in 3.3 and 3.4 after being subjected to 40 hours of temperature cycling between O degrees F and +125 degrees F in accordance with 5.1.2.1 of MIL-STD-2164. 3.5.12 Environmental stress screeninq (ESS) vibration. The Front Panel Assemb
48、ly shall meet the performance requirements in 3.3 to 3.4 after being subjected to random motion in the range of 20 to 2000 Hz for 5 minutes at an axis perpendicular to the largest surfaces of the Front Panel Assembly. Acceleration spectral density is 6.06 g. WS in accordance with 5.1.1 of MIL-STD-21
49、64. 3.5.13 m. The Front Panel Assembly shall meet the requirement of Drawing 12922105 when integrated into an M90 RADAR CHRONOGRAPH (NSN 1290-01-073-0746) supplied as Government Furnish Material. 3.6 Workmanship. The workmanship requirements of MIL-F-13926 and MIL-STD-454 shall apply. * 3.7 Fabrication. The Panel Assembly shall be manufactured in accordance with Drawings 12922119 and 12922129. 10 Provided
