MIL-STD-202H.pdf - 第253页

MI L - S TD - 202 - 30 5 CO NT E N T S PARAGRAPH PAG E FOREW ORD … ………………………………………………………. ii 1. SCOPE 1 1.1 Purpose …… ………………… …………………. …… .. …………. 1 2. APPLICABLE D O C U M EN T S 1 3. DEFINTIONS 1 4. GENERAL RE Q UI R …

MIL-STD-202-305

FOREWORD

1. This standard is approved for use by all Departments and Agencies of the Department of Defense.

2. This entire standard has been revised. This revision has resulted in many changes to the format, but the most

significant one is the splitting the document into test methods. See MIL-STD-202 for the change summary.

3. Comments, suggestions, or questions on this document should be emailed to std202@dla.mil or addressed to:

Commander, Defense Logistics Agency, DLA Land and Maritime, ATTN: VAT, P.O. Box 3990, Columbus, OH

43218–3990. 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.

北测（上海）电子科技有限公司

联系方式：xuyj@beice-sh.com 13917165676

MIL-STD-202-305

CONTENTS

PARAGRAPH PAGE

FOREWORD…………………………………………………………. ii

1. SCOPE 1

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

2. APPLICABLE DOCUMENTS 1

3. DEFINTIONS 1

4. GENERAL REQUIREMENTS 1

4.1 Procedure…………..…….………………………..….….…..….. 1

5. DETAILED REQUIREMENTS 1

5.1 Summary…………………………………………..…..…………. 1

6. NOTES 2

6.1 Supersession data………………………………………………. 2

iii

北测（上海）电子科技有限公司

联系方式：xuyj@beice-sh.com 13917165676

MIL-STD-202-305

METHOD 305

CAPACITANCE

1. SCOPE

1.1 Purpose. The purpose of this test is to measure the capacitance of component parts. Preferred test

frequencies for this measurement are 60 Hz, 100 Hz, 120 Hz, 1 kHz, 100 kHz, and 1 MHz.

2. APPLICABLE DOCUMENTS

This section not applicable to this standard.

3. DEFINTIONS

This section not applicable to this standard.

4. GENERAL REQUIREMENTS

4.1. Procedure. The capacitance of the specimen shall be measured with a capacitance bridge or other suitable

method at the frequency specified. Unless otherwise specified, the measurement shall be made at a temperature of

25°C ± 5°C. In the case of measurement dispute, capacitance measurements shall be made at or corrected to 25°C.

The inherent accuracy of the measurement shall be ±(0.5 percent +0.2 picofarad) unless otherwise specified.

Suitable measurement technique shall be used to minimize errors due to the connections between the measuring

apparatus and the specimen. The alternating-current (ac) voltage actually impressed across the specimen shall be

as low as practicable. When a direct-current (dc) polarizing voltage is required, it shall be as specified and shall

exceed the peak ac voltage impressed across the specimen; however, the sum of the peak ac and the dc voltages

shall not exceed the voltage rating of the specimen.

5. DETAILED REQUIREMENTS

5.1. Summary. The following details are to be specified in the individual specification:

a. Test frequency (see 4.1).

b. Test temperature, if other than that specified (see 4.1).

c. Limit of accuracy, if other than that specified (see 4.1).

d. Magnitude of polarizing voltage, if applicable (see 4.1)

e. Magnitude of AC rms test signal, if applicable (see 4.1).

北测（上海）电子科技有限公司

联系方式：xuyj@beice-sh.com 13917165676