Downloaded from https://www.everyspec.com MIL-STD-81OD 19 JU IV 1Q81 SUPERSEDING MIL-STD-81OC 10 March 1975 MILITARY STANDARD ENVIRONMENTAL TEST METHODS AND ENGINEERING GUIDELINES ‘0,,.: FSC ENVR A?SC Number F3208

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r Downloaded from https://www.everyspec.com ~.—. .,. MIL-STD-81OD I 19 Jllly1983 I ENVIRONMENTAL TEST METHODS AND ENGINEERING GUIDELINES MIL-STD-810D I 1. This Military Standard is approved for use by all Departments and Agencies of the Department of Defense. 2. Recommended corrections, additions, or deletions shall be addressed to Commander, Aeronautical Systems Division, Attn: ASD/ENESS, Wright-Patterson AFB, Ohio 45433. ~ { ~1 I 8 ,.. ii L.–-..-..

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Downloaded from https://www.everyspec.com ..-. --- ---- MIL-SI’U-UIUU 19 July 1983 FOREWORD MIL-STD-810D has been revised to require more careful attention to environments throughout the development process. A course of action for determining and assessing the environments to which an item will be exposed during its service life has been added to section 4, General Requirements. The additional General Requirements aid in preparation for design and preparation for test. Document- ation requirements for the design and testing procese have also been added to section 4. The bulk of the standard remains devoted to test methods.

Each individual method has been revised to encourage more accurate determination of the environmental stresses that an equipment will encounter during its service life. Guidance for accelerated or aggravated testing during the design process is included in some caaes. Each test method has been divided into two sections: Section I providea guidance for choosing and tailoring a particular test procedure; Section II includes step-by-step test procedures. In some methods, net only the test values, but alsc the sequence of steps is tailorable. The result cf this revision will be that this standard cannot be called out cr applied as a fixed, relatively simple routine.

Instead, an environmental engineering specialist will have to choose and alter the test procedures to suit a particular combination or sequence of environmental conditions for a specific equipment application. The methods c~ this standard are not intended to satisfy all safety compliance testing requirements. Safety compliance testing may require tests not covered herein. Technical questions may be addressed to the following offices: Air Force Wright Aeronautical Laboratories AFWAL/FIEE Wright-Patterson AFB, Ohio 45433 Telephone: Commercial (513) 255-5082 Autovon 785-5082 Hq US Army Test and Evaluation Command DRSTE-AD-M Aberdeen Proving Ground, MD 21005 Telephcne:

Commercial (301) 278-3677 Autcvon 283-3677 Naval Air Engineering Center ESSD Code 9313 Lakehurst, NJ 08733 Telephone: Commercial (201) 323-7458 Autcvon 624-7458 iii

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Downloaded from https://www.everyspec.com MIL-STD-810D 19 JUIY 1983 CONTENTS EaKQ 1. 1.1 1.2 - 1.3 SCOPE 1 Purpose Application Limitations 1 1 2. 2.1 2.1.1 2.2 REFERENCED DOCU~NTS 1 1 1 2 Government documents Specifications, standards, and handbooks Order of precedence 3. DEFINITIONS 2 4. 4.1 4.2 4.2.1 4.2.2 4.2.2.1 U.2.2.2 4.2.2.3 4.2.2.4 4.3 4.4 4.4.1 4.4.2 4.4.3 4.4.3.1 4.4.3.2 4.4.4 4.4.5 4.4.6 4.5 4.5.1 4.5.,1.1 4.5.2 4.5.3 4.5.4 4.5.4.1 4.5.4.2 GENERAL REQUIREMENTS 4 4 4 4 4 Q 4 6 9 10 10 10.

11 11 11 11 11 11 11 11 11 12 12 12 12 12 General Tailoring Objective of tailoring Tailoring tasks Environmental Management Plan Life Cycle Environmental Profile Environmental Design Criteria and Test Plan Operational Environmental Verification Plan Use of field/fleet data Test conditions Tolerances for test conditions Accuracy of test instrumentation calibration Stabilization of test temperature .Test item operating Test item nonoperating Test sequence Teat procedures Test conditions General test performance guidance Pretest performance record Pretest record Installation of teat item in test facility Performance check during test Interrupted teats In-tolerance interruptions Methods 503.2, 506.2, 510.2, 511.2, 514.3, 12..

4.5.4.3 516.3, and 519.3 Methods 500.2, 501.2, 502.2, 505.2, 508.3, 4.5.5 4.5.6 4.5.7 4.5.8 4.5.9 4.6 J+.6.1 509.2, 512.2, 513.3, 521J.0,and 521.0 Combined tests Post-test data Failure criteria Additional or different failure criteria Environmental test report Climatic regions Map of climatic regions 13 13 15. 13, 15 :15, 15 15 15 U.6.2 Delimitation of climatic design types iv

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