1、 MIL-DTL-48550A 16 August 2012 SUPERSEDING MIL-C-48550(AR) 15 August 1978 DETAIL SPECIFICATION COLLIMATOR, INFINITY AIMING REFERENCE - M1A2 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the Collimato
2、r, Infinity Aiming Reference: M1A2, which consists of a collimator with integral tripod and cover. This equipment is referenced throughout this specification as “Collimator.” 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specifica
3、tion. This section does not include documents 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 requirements of documents cit
4、ed in sections 3 and 4 of this specification, whether or not documents are listed in this section. Comments, suggestions, or questions on this document should be addressed to: Commander, US Army ARDEC, ATTN: RDAR-QES-E, Picatinny Arsenal, New Jersey 07806-5000 or emailed to picaardecstdznbranchconus
5、.army.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. AMSC N/A FSC 1240 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. INCH-POUND Reactivated after
6、 16 August 2012 and may be used for new and existing designs and acquisitions Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-48550A 2 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, sta
7、ndards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-13830 - Optical Components for Fire Control Instruments; General
8、Specification Governing the Manufacture, Assembly and Inspection of MIL-F-13926 - Fire Control Materiel, Manufacture, and Inspection, General Specification for DEPARTMENT OF DEFENSE STANDARDS MIL-STD-1916 - DOD Preferred Methods for Acceptance of Product (Copies of federal and military specification
9、s, standards, and handbooks are available online at https:/assist.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government document
10、s, drawings, and publications form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. U.S. ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING CENTER (ARDEC) DRAWINGS 12984644 - Colli
11、mator Infinity Aiming Reference M1A2 (Copies of these drawings may be requested online at pica.drawing.requestconus.army.mil or from U.S. Army ARDEC, ATTN: RDAR-EIS-PE, Picatinny Arsenal, NJ 07806-5000) 2.3 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conf
12、lict between the text of this document and the references cited herein, the text of this document shall take precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. Provided by IHSNot for ResaleNo reproduction or networ
13、king permitted without license from IHS-,-,-MIL-DTL-48550A 3 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Conformance. A sample shall be subject to conformance inspection in accordance with 4.3. 3.3 C
14、ollimator. The item shall conform to drawing 12984644. 3.4 Environmental. 3.4.1 Storage temperature. With fresh batteries installed, the collimator shall be thermally stabilized at temperatures of -60 5F and +160 5F for a period of not less than 4 hours at each temperature. While thermally stabilize
15、d at these temperatures, the collimator shall be subjected to a visual and tactile inspection and shall not exhibit any signs of physical failure or damage. Upon return to and stabilization at standard ambient temperature, +60F to +90F, the collimator shall meet the requirements of 3.4.2 through 3.7
16、.12 inclusive. 3.4.2 Operating temperature. With fresh batteries installed, the collimator shall meet the requirements of 3.7.4 through 3.7.8 inclusive while exposed to and thermally stabilized at temperatures of +145 5F and -50 5F for a period of not less than 4 hours at each temperature. Upon retu
17、rn to and stabilization at standard ambient temperature, +60F to +90F, the collimator shall meet the requirements of 3.4.3 through 3.7.12 inclusive. 3.4.3 Vibration. The collimator unit shall be vibrated at a constant frequency of 30 cycles per second with an amplitude of 1/16 inch (1/8 inch maximum
18、 excursion) for a period of 5 minutes 15 seconds to simulate transportation in a vehicle. Subsequent to vibration, the collimator shall not exhibit any signs of physical failure or damage and meet the requirements of 3.4.4 through 3.7.12 inclusive. 3.4.4 Rain. The collimator unit with the cover secu
19、red in place and the legs folded to the carrying position shall be exposed to a simulated rainfall of 4 + 1 inches per hour as measured at the surface of the equipment for a period of not less than 2 hours. Immediately following the rain test, neither the interior of the cover nor the collimator sha
20、ll show evidence of water penetration. 3.5 Sealing. The collimator unit (telescope) shall be capable of holding dry nitrogen at a minimum internal pressure of 5 psig for a period of not less than 2 without the loss of pressure in excess of 0.2 psig for that 2 hour period. The internal pressure of th
21、e telescope shall then be reduced to 0 psig. The telescope shall then be sealed with an internal pressure of between 0.25 and 0.50 psig of dry nitrogen. 3.6 Optical. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-48550A 4 3.6.1 Reticle lean.
22、 With the zero vertical reticle line parallel to the image of a plumb line, the bubble of the level vial shall be within the central graduation marks on the vial. 3.6.2 Reticle accuracy. The angle subtended by the two 50 mil graduation lines on the horizontal axis of the reticle pattern shall be 100
23、 mils 0.25 mil. 3.6.3 Parallax. The parallax between the center cross of the reticle pattern and the image of an infinity target shall not exceed 0.1 mil. 3.6.4 Cleanliness. The optical system shall meet the cleanliness requirements of MIL-PRF-13830 and there shall be no more than 3 particles of dir
24、t visible on the reticle and the area of such particle shall not be in excess of the area equivalent to a size 10 dig. There shall be no dirt within the optical system which interferes with observation or adversely affects image quality. 3.6.5 Reticle illumination. All reticle graduations and number
25、s shall be clearly defined when observed through a four power telescope in ambient darkness from 15 to 48 feet inclusive. 3.6.6 Collimated light output. With fresh batteries installed, the brightness of the collimated light output measured in complete darkness at approximately one quarter inch from
26、end of collimator shall be a minimum of 275 microlamberts. 3.7 Mechanical. 3.7.1 Elevation travel. The elevation travel of the line of sight shall cover the minimum excursion from - 800 mils to + 800 mils when the tripod legs are fully extended. 3.7.2 Azimuth travel. The instrument shall provide a f
27、ull and unrestricted 6400 mils of azimuth rotation. 3.7.3 Open sight. The light of sight of the open sight shall be parallel to the optical axis within one degree. 3.7.4 Operability. As assembled, there shall be no looseness, rattling, restriction or binding of any part of the equipment when the col
28、limator is placed from the carrying position to operational position. The hinge of the tripod legs shall have sufficient torque to support the fully extended legs in a horizontal position. 3.7.5 Knob travel. Each knob shall provide a range of adjustment from full locking to free movement of the inst
29、rument component. 3.7.6 Knob locks. The knob locks shall meet the requirements of Table 1 at the standard ambient temperature of +60F to +90F. The corresponding part shall not move Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-48550A 5 when
30、 the test value is applied. At the extreme operating temperatures of 3.4.2, the knob locks shall be able to be locked and unlocked by hand. TABLE I. Knob locks. Lock control Torque to secure (inch pounds) Test value Rotate collimator on tripod 25 50 inch pounds of torque Cross level the collimator 2
31、5 50 inch pounds of torque Elevate the collimator 25 10 foot pounds of torque Telescope of tripod legs 25 40 pounds of force 3.7.7 Telescope alignment. With the lock released the minimum torque required to rotate the scope to center the level vial shall not be less than 3 inch pounds and the maximum
32、 torque required shall not exceed 22 inch pounds when checked at standard ambient temperature of +60F to +90F. The maximum torque shall not exceed 35 inch pounds when checked at the extreme operating temperatures of 3.4.2. 3.7.8 Azimuth fine adjustment knob. 3.7.8.1 Azimuth fine adjustment knob torq
33、ue. The torque required to operate the azimuth fine adjustment knob shall not exceed 5 inch pounds when checked at standard ambient temperature of +60F to +90F and shall not exceed 10 inch pounds when exposed to and checked at the extreme operating temperatures of 3.4.2. 3.7.8.2 Azimuth fine adjustm
34、ent knob durability. With the azimuth fine adjustment knob at its extreme travel position (both in and out), the adjustment assembly shall withstand a torque load of 25 to 30 inch pounds, without stripping the threads within the adjustment assembly when checked at standard ambient temperature of +60
35、F to +90F. 3.7.9 Fastening devices. Catches and similar fastening devices used to secure the cover shall function without interference and shall securely fasten the cover to the base when secured. 3.7.10 Carrying handle. The carrying handle shall be securely attached and show no evidence of loosenes
36、s of assembly. 3.7.11 Strap security. The strap shall be subjected to a direct pull of 25 pounds at 90 degrees to the securing surface, the strap shall remain secure, the rivets firm, and the cover shall subsequently meet the requirements of 3.4.4. 3.7.12 Gasket. The rubber gasket at the base of the
37、 cover assembly shall be securely attached and show no gap where ends meet. 3.8 Workmanship. Workmanship of the collimator shall be in accordance with the requirements of MIL-F-13926. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-48550A 6 4
38、. VERIFICATION TABLE II. Requirement/verification cross reference matrix. Method of Verification Class of Verification A - First Article B - Conformance 1 - Analysis 2 - Demonstration 3 - Examination 4 - Test Section 3 Requirements Description Verification Method Verification Class Section 4 Verific
39、ation 1 2 3 4 A B 3.1 First article X X X 4.2 3.2 Conformance X X X 4.3 3.3 Collimator X X X 4.3.2.1 3.4.1 Storage temperature X X X 4.4.1 3.4.2 Operating temperature X X X 4.4.2 3.4.3 Vibration X X X 4.4.3 3.4.4 Rain X X X 4.4.4 3.5 Sealing X X X 4.5 3.6.1 Reticle lean X X X 4.6.1 3.6.2 Reticle acc
40、uracy X X X 4.6.2 3.6.3 Parallax X X X 4.6.3 3.6.4 Cleanliness X X X 4.6.4 3.6.5 Reticle illumination X X X 4.6.5 3.6.6 Collimated light output X X X 4.6.6 3.7.1 Elevation travel X X X 4.7.1 3.7.2 Azimuth travel X X X 4.7.2 3.7.3 Open sight X X X 4.7.3 3.7.4 Operability X X X 4.7.4 3.7.5 Knob travel
41、 X X X 4.7.5 3.7.6 Knob locks X X X 4.7.6 3.7.7 Telescope alignment X X X 4.7.7 3.7.8.1 Azimuth fine adjustment knob torque X X X 4.7.8.1 3.7.8.2 Azimuth fine adjustment knob durability X X X 4.7.8.2 3.7.9 Fastening devices X X X 4.7.9 3.7.10 Carrying handle X X X 4.7.10 3.7.11 Strap security X X X
42、4.7.11 3.7.12 Gasket X X X 4.7.12 3.8 Workmanship X X X 4.8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-48550A 7 4.1 Classification of inspection. The inspection requirements specified herein are classified as follows: a. First article in
43、spection (see 4.2) b. Conformance inspection (see 4.3) 4.2 First article. When specified, a sample shall be subjected to first article verification in accordance with Table III. TABLE III. First article inspection criteria. Examination or Test Requirement Paragraph Verification Paragraph Collimator
44、3.3 4.3.2.1 Storage temperature 3.4.1 4.4.1 Operating temperature 3.4.2 4.4.2 Vibration 3.4.3 4.4.3 Rain 3.4.4 4.4.4 Sealing 3.5 4.5 Reticle lean 3.6.1 4.6.1 Reticle accuracy 3.6.2 4.6.2 Parallax 3.6.3 4.6.3 Cleanliness 3.6.4 4.6.4 Reticle illumination 3.6.5 4.6.5 Collimated light output 3.6.6 4.6.6
45、 Elevation travel 3.7.1 4.7.1 Azimuth travel 3.7.2 4.7.2 Open sight 3.7.3 4.7.3 Operability 3.7.4 4.7.4 Knob travel 3.7.5 4.7.5 Knob locks 3.7.6 4.7.6 Telescope alignment 3.7.7 4.7.7 Azimuth fine adjustment 3.7.8 4.7.8 Fastening devices 3.7.9 4.7.9 Carrying handle 3.7.10 4.7.10 Strap security 3.7.11
46、 4.7.11 Gasket 3.7.12 4.7.12 Workmanship 3.8 4.8 4.2.1 First article quantity. First article inspections shall be performed on three (3) complete units. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-48550A 8 4.2.2 First article inspection t
47、o be performed. The first article inspection shall be performed in accordance with Table III. 4.2.3 First article rejection. If any item of the sample fails to comply with any of the first article requirements, the first article shall be rejected. 4.3 Conformance inspection. 4.3.1 Lot formation. Lot
48、 formation shall be in accordance with the lot formation requirements of MIL-STD-1916, paragraph “Formation and identification of lots and batches.” 4.3.2 Conformance inspection quantity. Conformance inspection quantities shall be in accordance with 4.3.2.1 and MIL-STD-1916, paragraph “Sampling of lots or batches.” Conformance criteria shall be in accordance with 4.3.2.1 and MIL-STD-1916, paragraph “Verification level (VL).” Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-48550A 9 4.3.2.1 Collimator. Drawing number 12984644 Cl
