MIL-STD-202H.pdf - 第4页

MI L - S TD - 202H CO NT E N T S PARAGRAPH Page 1. SCOPE ............. ...................................................................................................... 1 1.1 Purpose ......... ......................…

MIL-STD-202H

SUMMARY OF REVISON H MODIFICATIONS

1. The individual test methods are now each a separate document. They are numbered in the following method

(using method 106 as an example), MIL-STD-202-106.

2. The preferred method to reference a test method is MIL-STD-202-xxx, where the xxx represents the test method

number.

3. Paragraph 6.3 is now “Cancelled methods”. This paragraph contains guidance for cancelled test methods and

test conditions and the appropriate superseding method and conditions.

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MIL-STD-202H

CONTENTS

PARAGRAPH Page

1. SCOPE ................................................................................................................... 1

1.1 Purpose ............................................................................................................... 1

1.2 Test method numbering system .......................................................................... 1

1.2.1 Class of tests ....................................................................................................... 1

1.2.2 Revision of test methods ..................................................................................... 1

1.3 Method of reference ............................................................................................ 1

2. APPLICABLE DOCUMENTS .................................................................................. 1

2.1 General ............................................................................................................... 1

2.2 Government documents ...................................................................................... 1

2.2.1 Specifications, standards, and handbooks .......................................................... 1

2.2.2 Other government documents, drawings, and publications ................................. 2

2.3 Non-Government publications ............................................................................. 2

2.4 Order of precedence ........................................................................................... 2

3. DEFINITIONS ......................................................................................................... 2

4. GENERAL REQUIREMENTS ................................................................................. 2

4.1 Test requirements ........................................................................................ 2

4.2 Test conditions ............................................................................................. 2

4.2.1 Permissible temperature variation in environmental chambers .................... 2

4.3 Reference conditions ................................................................................... 2

4.4 Calibration requirements ..............................................................................

5. DETAILED REQUIREMENTS ................................................................................ 3

6. NOTES ................................................................................................................... 3

6.1 Intended use ................................................................................................ 3

6.2 Sequence of tests ........................................................................................ 3

6.3 Cancelled methods ...................................................................................... 3

6.4 Chemical listing ............................................................................................ 4

6.5 Subject term (key word) listing ..................................................................... 4

6.6 Numerical index of test methods .................................................................. 5

6.7 Change notations ......................................................................................... 6

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MIL-STD-202H

1. SCOPE

1.1 Purpose. This standard establishes uniform methods for testing electronic and electrical component parts, including

basic environmental tests to determine resistance to deleterious effects of natural elements and conditions surrounding military

operations, and physical and electrical tests. For the purpose of this standard, the term "component parts" includes such

items as capacitors, resistors, switches, relays, transformers, inductors, and others. This standard is intended to apply only to

small component parts, weighing up to 300 pounds or having a root mean square test voltage up to 50,000 volts unless

otherwise specifically invoked. The test methods described herein have been prepared to serve several purposes:

a. To specify suitable conditions obtainable in the laboratory that give test results equivalent to the actual service

conditions existing in the field, and to obtain reproducibility of the results of tests. The tests described herein are not

to be interpreted as an exact and conclusive representation of actual service operation in any one geographic

location, since the only true test for operation in a specific location is an actual service test at that point.

b. To describe in one standard (1) all of the test methods of a similar character which appeared in the various joint or

single-service electronic and electrical component parts specifications, (2) those test methods which are feasible for

use in several specifications, and (3), the recognized extreme environments, particularly temperatures, barometric

pressures, etc., at which component parts will be tested under some of the presently standardized testing

procedures. By so consolidating, these methods may be kept uniform and thus result in conservation of equipment,

man-hours, and testing facilities. In achieving these objectives, it is necessary to make each of the general tests

adaptable to a broad range of electronic and electrical component parts.

c. The test methods described herein for environmental, physical, and electrical tests shall also apply, when applicable,

to parts not covered by an approved military specification, military sheet form standard, specification sheet, or

drawing.

1.2 Test method numbering system. The test methods are designated by numbers assigned in accordance with the

following system:

1.2.1 Class of tests. The tests are divided into three classes: Test methods numbered 101 to 199 inclusive, cover

environmental tests; those numbered 201 to 299 inclusive, cover physical characteristics tests; and those numbered 301 to

399 inclusive, cover electrical characteristics tests. Within each class, test methods are serially numbered in the order in

which they are introduced into this standard.

1.2.2 Revision of test methods. Revisions of test methods are indicated by a letter following the method number. For

example, the original number assigned to the moisture resistance test method is -106; the first revision of that method

“-106A”, the second revision, “-106B”, etc.

1.3 Method of reference. When applicable, test methods contained herein shall be referenced in the individual specification

by specifying this standard with the dash number(-xxx) or this standard with the method number, and the details required in

the summary paragraph of the referenced method. To avoid the necessity for changing specifications which refer to this

standard, the revision letter following the method number shall not be used when referencing test methods. The preferred

wording to reference a method starting with revision H is “MIL-STD-202-106”; “MIL-STD-202, method 106” is still acceptable.

2. APPLICABLE DOCUMENTS

2.1 General. The documents listed in this section are specified in sections 3, 4, 5, and individual test methods of this

standard. This section does not include documents cited in other sections of this standard 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 specified requirements documents cited in sections 3, 4, 5, and the individual test methods

of this standard, whether or not they are listed.

2.2 Government documents.

2.2.1 Specifications, standards, and handbooks. The following specifications, standards, 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.

FEDERAL SPECIFICATIONS

This section is not applicable to this standard.

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