1、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STANDARDS MILITARY MIL-STD-105 MIL-STD-129 MIL-STD-147 MIL-STD-454 MIL-STD-810 MIL-STD-1188 MS-245 3 5 DLSM-B-804912 SM-C-805906 - Sampling Procedures and Tables for - Marking for Shipment and Storage -
2、 Palletized and Containerized Unit Loads, Inspection by Attributes 40 Inch x 48 Inch Pallets, Skids, Runners, or Palletized Type Base Electronic Equipment - Standard General Requirements for - Environmental Test Methods - Commercial Packaging of Supplies and - Fasteners-Container Closure Equipment D
3、RAWINGS - Gunners Display, AN/VSG-2 - Image Intensifier, 40 Millimeter (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.
4、1 3. REQUIREMENTS 3.1 Item definition. The Gunners Display, ANIVSG-2, herein known as the gunners display, is a major component of the Tank Mounted Thermal Sight, AN/VSG-2. The gunners display contains an 8 power daylight telescope, a thermal channel display, a reticle projector, and the AN/VSG-2 sy
5、stem controls. In conjunction with the head assembly, it displays both daylight and infrared scenes to the tank gunner, displays fire control solutions generated by the fire Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.5 Major components. The gu
6、nners display consists of the following components and subassemblies and shall be constructed in accordance with applicable drawings, specifications and as specified herein. a. b. d. e. f. g* h. i. k. 1. m. C j. Image Intensifier, 40 Millimeter - SM-C-805906 Eyepiece, Biocular, AN/VSG-2 - MIL-E-4938
7、3 8X Daylight Objective Assembly 8X Telescope Assembly Reticle Projector As semb ly Gunners Display Subassembly LED Prism Assembly IR Boresight Assembly Rear Cover Assembly Image Intensifier Prism Assembly Image Intensifier Power Supply Assembly Built-In Test Equipment (BITE) Gunners BITE Printed Wi
8、ring Board (PWB) 3.6 Preconditioning. Each gunners display shall be subjected to a 48-hour preconditioning prior to delivery. 3.7 Operation. +18 to +30 Volts direct current (Vdc) (Standby) 25 mA +18 to +30 Vdc (Operate) 600 mA +5 Vdc (BITE) 200 mA +5 Vdc (HVPS) 45 mA 115 Vac, 400 Hz 20 mA 3.7.2 Lumi
9、nance uniformity. With a uniform scene input, the luminance of each display shall not vary more than +15 percent from the average display luminance over the central 50 percent f the display. 3.7.3 Spurious signals. Spurious images shall not be perceptible on the display. There shall be no discernibl
10、e image persistence, and no discernible vibration of the raster lines. There shall be no perceptible rotation of the raster. 3.7.4 Sealing. The gunners display shall show no evidence of leakage in excess of 0.2 psig when subjected to an internal pressure of 5, +1 psig for a minimum of 2 hours. The i
11、nterior atmosphere of the units shall contain dry nitrogen (having a maximum dew point of -32 C at atmospheric pressure) at a pressure of 0.25 to 5.0 psig when delivered. O 3.7.5 Zero reference for reticle projector unit (WU). Zero reference shall be a measured voltage of 0.0000, 20.0050 Vdc at the
12、output of the Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-49377 58 797790b Olb3547 T MIL-G-49 377 (ER) 3.7.6 Boresight excursion (8X and thermal), The reticle shall be move- able with the boresight knobs a minimum of 9 mils up, 11 mils down
13、, 10 mils right and 10 mils left from the zero reference point specified in 3.7.5. 3.7.7 Reticle displacement accuracy and linearity. For any displacement of the reticle (left or right), the voltage shall be 0.1464 volt per mil of displacement +0.0293 volt in the 8X daylight and 0.1464 volt per mil
14、of displacement 70.0200 volt in the thermal display from the zero reference point specified in 3.7.5. 3.7.8 Electromechanical backlash. The electromechanical backlash of the reticles shall not exceed 0.10 mil. 3.7.9 Reticle parallax (8x1. Parallax between the image of the reticle pattern and the tar
15、get image shall not exceed 0.1 mil when the target is at 1200, - +lo0 meters. 3.7.10 Reticle boresight backlash. Backlash in any boresight knob shall not exceed 0.1 mil. 3.7.11 Diopter zero setting. The diopter scale shall indicate zero - t0.25 diopter when an image and a reticle are focused at O di
16、opter. 3.7.12 Torque, diopter. The running torque required to rotate the diopter When checked at the extreme movement through the specified range shall be within the limits of 1.5 and 7.0 inch-pounds at ambient conditions (see 6.3). temperatures of 3.8.1.1 and 38.2.1, the running torque shall be wit
17、hin the limits of 1.5 and 15 inch-pounds. 3.7.13 Boresight knob, torque. The running torque required to rotate the boresight knobs through the range specified in 3.7.6 shall not be greater than 4.0 inch-pounds when checked at ambient conditions. 3.7.14 Line of sight (LOS) variation, motor driven. Mo
18、tion of the reticle in elevation shall not exceed +0.2 mil when the reticle is traversed over the full excursion (+25,0 - mils) relative to the image of a horizontal line. 3.7.15 Parallelism of reticle and image. The horizontal lhe of the reticle pattern through the boresight cross shall be parallel
19、 to the gunners horizontal mounting surface within 2 degrees in both the 8X day- light and thermal channels. 3.7.16 Controls. 3.7.16.1 Contrast. Each contrast control shall vary the contrast. 3.7.16.2 Brightness. Each brightness control shall adjust the background level of the image. 3.7.16.3 Polari
20、ty. Each polarity selector shall reverse the image contrast and cause the display to represent hot or cold targets as either bright or dark. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.7.16.4 Mode select. When activated, the mode select shall
21、 switch between the OFF, Standby, and Operation modes. 3.7.16.5 Reticle brightness. The reticle brightness shall vary the illum- ination of all reticles from off to full brightness. 3.7.16.6 Boresight. The boresight controls shall adjust the azimuth or elevation in their respective channels. 3.7.16.
22、7 Filter select. The filter select control shall select either 7 clear, haze, red, or neutral density filter for the 8X daylight eyepiece. 3.7.16.8 Test switch. The test switch shall cause all the test lamps to illuminate. 3.7.17 Reticle total travel. The reticle shall traverse in azimuth 29, +i mil
23、s either side of the zero reference position as defined in 3.7.5. 3.7.18 Reticle limit switches. The reticle limit switches shall activate when the reticle is positioned at least 25.0 mils and less than 27.3 mils on either side of the zero reference position. activate prior to the return of the reti
24、cle past the 25 mil point. The reticle limit switches shall 3.7.20 Reticle motor starting voltage. A control phase voltage of 8 volts root-mean-square (Vrms) shall drive the motor in each direction with the appropriate phase shift. 3.7.21 Reticle pattern. The reticle pattern shall be as shown in fig
25、ure 1. 3.7.22 8X resolution. The 8X channel resolution shall not be greater than 6 seconds of arc. , 3.7.23 Image tilt. A line which is parallel to the gunners displaylhead assembly mounting surface shall appear parallel in the eyepieces of the gunners display parallel to the mounting surface within
26、 2 degrees. _- 3.7.24 Diopter backlash. Backlash in the diopter movement shall not exceed 0.250 diopter as read on the diopter scale. 3.8 Environment. 3.8.1 Low temperature. 3.8.1.1 Operation. The gunners display shall not be damaged when operated at temperatures to -32OC (see 6.3). Provided by IHSN
27、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-47377 58 777770b 0263550 T MIL-G-49377 (ER) 3.8.8 Humidity. The gunners display shall not be damaged by exposure t
28、o 100 percent relative humdity. 3.8.9 Dust. The gunners display shall not be damaged when exposed to dust at velociG up to 1750, 2250 feet per minute (fpm) for 12 hours. 3.9 Reliability. Not applicable. 3.10 Workmanship. Workmanship shall be as specified in MIL-STD-454, Require- ment 9. 3 4. QUALIY
29、ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the con- tract, the contractor is responsible for the performance of all inspection requirements as specified herein. tract, the contractor may use his own or any other facilities suitable for the performance of th
30、e inspection requirements specified herein, unless disap- proved by the Government. inspections set forth in the specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed require- ments. Except as otherwise specified in the con- The Governme
31、nt reserves the right to perform any 4.2 Classification of inspection. Inspections shall be classified as follows : a. First article inspection (4.3) b. Quality conformance inspection (4.4) c. Inspection of packaging (4.10) 4.3 First article inspection. order, the contractor shall furnish 5 gunners
32、displays for first article inspection (see 6.2). When specified in the contract or purchase i 4.3.1 Inspection. Each assembled first article gunners display shall be examined in accordance with table I. Presence of one or more defects shall be cause for rejection of the gunners display. 4.3.2 Precon
33、ditioning. Each gunners display which has passed the inspect- ion of 4.3.1 will be subjected to the preconditioning of 4.6. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without l
34、icense from IHS-,-,-MIL-G-49377(ER) TABLE II. First article inspection. - Continued Inspect ion Parallelism of reticle and image Contro 1 s Reticle total travel Ret ic le limit swit Che s Reticle motion motor Reticle motor starting voltage Reticle pattern 8X resolution Image tilt Diopter backlash Lo
35、w temperature High temperature Temperature shock Alt i tude Shock Vibration Water pro0 f ness Humidity Dust Requirement Paragraph 3.7.15 3.7.16 3.7.17 3.7.18 3.7.19 3.7.20 3.7.21 3.7.22 3.7.23 3.8.1 3.8.2 3.8.3 3.8.4 3.8.5 3.8.6 3.8.7 3.8.8 3.8.9 3.7.24 Test Paragraph 4.7.15 4.7.16 4.7.17 4.7.18 4.7
36、.19 4.7.20 4.7.21 4.7.22 4.7.23 4.7.24 4.8.1 4.8.2 4.8.3 4.8.4 4.8.5 4.8.6 4.8.7 4.8.8 4.8.9 4.4 Quality conformance inspection. 4.4.1 Inspection. Each assembled gunners display shall be examined in accordance with table I. Presence of one or more defects shall constitute failure of that gunners dis
37、play. 4.4.2 Preconditioning. Each gunners display which has passed the in- spection of 4.4.1 shall be subjected to the preconditioning of 4.6. 4.4.3 Group A inspection. Each gunners display that has passed the pre- conditioning of 4.4.2 shall be inspected for the attributes specified in table III in
38、 any sequence. Failure of any gunners display to pass all the tests of table III shall constitute failure of that gunners display. TABLE III. Group A inspection. Requirement Inspec tion paragraph Zero reference for reticle Boresight excursion (8X and thermal) Ret ic le dis p 1 ac emen t accuracy Ele
39、ctromechanical backlash Line of sight (LOS) variation projector unit (WU) 3.7.5 3.7.6 3.7.7 3.7.8 I 3.7.14 7 paragraph 4.7.5 4.7.6 4.7.7 4.7.8 4.7.14 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-49377(ER) TABLE III. Group A inspection. - Con
40、tinued 1 Requirement nspec tion paragraph Parallelism of reticle and image 3.7.15 Con tr o 1 s 3.7.16 Reticle total travel 3.7.17 Reticle limit swit Che s 3.7.18 Reticle motion motor 3.7.19 Image tilt 3.7.23 I I Test paragraph 4.7.15 4.7.16 4.7.17 4.7.18 4.7.19 4.7.23 4.4.3.1 Group B inspection. Not
41、 applicable. 4.4.4 Group C inspection. Inspection lots (see 6.2) shall be formed from gunners displays which have passed the Group A inspection of 4.4.3. 4.4.4.1 Monthly Group C. Five gunners displays shall randomly be selected Failure from each lot and inspected for the attributes specified in tabl
42、e IV. of any gunners display to pass all the tests of table IV shall constitute Group C failure. TABLE IV. T. inspection Power Luminanc niformity Spurio$s:yiais Sealing Reticle parallax (8X) Reticle boresight backlash Diopter zero setting Torque, diopter Boresight knob torque Reticle motor starting
43、voltage Reticle pattern, 8X resolution Diopter backlash Requirement paragraph 3.7.1 3.7.2 3.7.3 3.7.4 3.7.9 3.7.10 3.7.11 3.7.12 3.7.13 3.7.20 3.7.21 3.7.22 3.7.24 Test paragraph 4.7.1 4.7.2 4.7.3 4.7.4 4.7.9 4.7.10 4.7.11 4.7.12 4.7.13 4.7.20 4.7.21 4.7.22 4.7.24 4.4.4.2 Tri-monthly Group C. Two gu
44、nners displays which have passed the tests of 4.4.3 and 4.4.4.1 shall randomly be selected from the first lot and every third lot thereafter. table V in any order. Following completion of the tests of table V, the tests of tables III and IV shall be re-performed. to pass all tests of table V, table
45、III, and table IV shall constitute Group C failure. The two gunners displays shall be tested per Failure of any gunners display Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-47377 58 = 7779706 0163554 7 MIL-G-49377 (ER) TABLE V. Group C trimo
46、nthly inspection. Inspec tion Unit Low temperature 2 High temperature 2 Temperature shock 2 Altitude 1 Shock 1 Vibration 1 Waterproofness 1 Humid it y 1 Requirement Test paragraph paragraph 3.8.1 3.8.2 3.8.3 3.8.4 3.8.5 3.8.6 3.8.7 3.8.8 4.8.1 4.8.2 4.8.3 4.8.4 4.8.5 4.8.6 4.8.7 4.8.8 4.4.4.3 Group
47、C failure criteria. Actions relative to Group C failure shall be as specified in the contract (see 6.2). 4.4.4.4 Reinspection of conforming Group C gunners display. Gunners displays which have been subjected to and passed Group C inspection of 4.4.4.1 shall be accepted on contract or order. subjecte
48、d to and passed Group C inspection of 4.4.4.2 shall have all damage (see 6.3) repaired and be reinspected per 4.4.3. Those gunners displays which subsequently pass all tests of 4.4.3 shall be accepted on contract. Gunners displays which have been b 4.6 Preconditioning. Prior to conducting any tests,
49、 each gunners display shall be subjected to a minimum of 6 preconditioning cycles. Each cycle shall conform to the profile of figure 2. -32OC and +52OC. frequency between 20 and 60 Hz for 10 minutes each operating hour. occurs, the unit shall be removed from this test, repaired, and returned to preconditioning. cycle after repair. Failure
