MIL-STD-202H.pdf - 第245页
MI L - S TD - 202 - 30 3 6. NOTES (This secti on contain s i n f or m at i on o f a g ener al or ex pl anat or y nat ur e t ha t m ay be he l pf ul , b u t is not man datory.) 6.1 Supers ession data . T he m ai n b ody a…
MIL-STD-202-303
METHOD 303
DC RESISTANCE
1. SCOPE
1.1 Purpose. The purpose of this test is to measure the direct-current (dc) resistance of resistors, electromagnetic
windings of components, and conductors. It is not intended that this test apply to the measurement of contact
resistance.
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. DC resistance shall be measured with a resistance bridge or other suitable test equipment. The
limit of error in the bridge or other test equipment shall not exceed one-tenth of the specified tolerance on the
measured resistance (for example, the limit of error in the bridge or other test equipment shall not exceed ± 0.5
percent if the specified tolerance on the measured resistance is ± 5 percent), unless otherwise specified. For inplant
quality conformance testing, the accuracy of the measurement shall be such to insure that the resistance value is
within the required tolerance. If a plus or minus tolerance is not specified, the limit of error in the bridge or other test
equipment shall not exceed ± 2 percent. The test current through the specimen shall be as small as practical
considering the sensitivity of the indicating instruments, unless the test current or voltage is specified. When it is
important that the temperature of the specimen shall not rise appreciably during the measurement, the test voltage
shall be applied uninterruptedly for as short a time as practicable, but in no case for more than 5 seconds, unless
otherwise specified. Unless otherwise specified, the measurement shall be made at a temperature of 25°C ± 5°C. In
the case of measurement dispute, dc resistance measurements shall be made at or corrected to 25°C.
5. DETAILED REQUIREMENTS
5.1 Summary. The following details are to be specified in the individual specification:
a. Limit of error of measuring apparatus, if other than one-tenth of specified tolerance (see 4.1).
b. Test voltage or current, if applicable (see 4.1).
c. Maximum period of uninterrupted test-voltage application, if other than 5 seconds (see 4.1).
d. Test temperature, if other than that specified (see 4.1).
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MIL-STD-202-303
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Supersession data. The main body and 38 parts of this revision of MIL-STD-202 replace superseded MIL-STD-
202.
Custodians: Preparing activity:
Army - CR DLA – CC
Navy - EC
Air Force - 85 (Project 59GP-2015-033)
DLA - CC
Review activities:
Army - AR, AT, AV, CR4, MI, SM, TE
Navy - AS, OS, SH
Air Force - 19, 99
NSA - NS
NOTE: The activities listed above were interested in this document as of the date of this document. Since
organizations and responsibilities can change, you should verify the currency of the information above using the
ASSIST Online database at https://assist.dla.mil/
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北测（上海）电子科技有限公司
联系方式：xuyj@beice-sh.com 13917165676
INCH-POUND
MIL-STD-202-304
18 April 2015
SUPERSEDING
MIL-STD-202G
w/CHANGE 2 (IN PART)
28 June 2013
(see 6.1)
DEPARTMENT OF DEFENSE
TEST METHOD STANDARD
METHOD 304, RESISTANCE-TEMPERATURE CHARACTERISTIC
AMSC N/A FSC 59GP
北测（上海）电子科技有限公司
联系方式：xuyj@beice-sh.com 13917165676