ASTM B794-97(2009)
(Test Method)Standard Test Method for Durability Wear Testing of Separable Electrical Connector Systems Using Electrical Resistance Measurements
Standard Test Method for Durability Wear Testing of Separable Electrical Connector Systems Using Electrical Resistance Measurements
SIGNIFICANCE AND USE
Materials for electrical connector contacts must satisfy a number of requirements in the areas of electrical, mechanical, and economic characteristics. The stability of electrical properties is one of the most important of these characteristics. Wear of contact surfaces may adversely affect these electrical properties, especially in designs where the contact surfaces are relatively thin coatings. This test method provides a means to compare various material systems on a basis relevant to their application in electrical connector contacts.
Repeated insertion and withdrawal of a connector may cause wear or other mechanical damage to the electrical contact surfaces, rendering those surfaces more susceptible to environmental degradation. This test method is intended to detect degradation of the electrical properties of the connector by such processes.
This test method describes procedures for conducting wear and durability testing of electrical connectors; the procedures produce quantitative results. These results may be used to compare the performance of different connector designs so that meaningful design choices can be made. Such results may also be used to compare the performance of a connector to a previously established standard to evaluate the quality of the samples under test.
The test results obtained from this test method are limited in their applicability to connector combinations that are equivalent in design and manufacture to those actually tested.
The user is cautioned that the conditions in this test should be compared to the conditions that the connector will experience in the intended application in order to determine the relevance of this test method to the particular needs of the user. For example, the environmental stress in this test method is less severe than certain industrial and marine environments and therefore test results are not directly applicable to predict the performance of product intended for use in such areas.
It is recomm...
SCOPE
1.1 This test method covers the effects of repeated insertion and withdrawal of separable electrical connectors which are harmful to the electrical performance of the connector.
1.2 This test method is limited to electrical connectors designed for use in applications where the current through any one connection in the connector does not exceed 5 A, and where the connector may be separated a number of times during the life of the connector.
1.3 This test method is limited to electrical connectors intended for use in air ambients where the operating temperature is less than 65°C.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
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Designation: B794 − 97(Reapproved 2009)
Standard Test Method for
Durability Wear Testing of Separable Electrical Connector
1
Systems Using Electrical Resistance Measurements
This standard is issued under the fixed designation B794; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Summary of Test Method
1.1 This test method covers the effects of repeated insertion
3.1 Sample connectors are wired for precision resistance
and withdrawal of separable electrical connectors which are
measurements of each test contact. The samples are divided
harmful to the electrical performance of the connector.
into two groups; then resistance measurements are made of
each test contact. The connectors in one group undergo a
1.2 This test method is limited to electrical connectors
designed for use in applications where the current through any number of insertion/withdrawal cycles appropriate for the
one connection in the connector does not exceed 5 A, and particular connector under test, and the resistances of these
where the connector may be separated a number of times connectors are measured again. The connectors in the other
during the life of the connector. group are not disturbed. All samples are subjected to an
accelerated aging test; then the resistances are measured again.
1.3 This test method is limited to electrical connectors
All samples are separated (withdrawn), exposed to an acceler-
intended for use in air ambients where the operating tempera-
ated aging test in the uninserted condition, removed from the
ture is less than 65°C.
test, reinserted, and resistances measured again. The various
1.4 The values stated in SI units are to be regarded as
resistance measurements are compared to detect effects of the
standard. No other units of measurement are included in this
wear and aging on electrical performance.
standard.
1.5 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 Materials for electrical connector contacts must satisfy a
responsibility of the user of this standard to become familiar
number of requirements in the areas of electrical, mechanical,
with all hazards including those identified in the appropriate
and economic characteristics. The stability of electrical prop-
Material Safety Data Sheet (MSDS) for this product/material
erties is one of the most important of these characteristics.
as provided by the manufacturer, to establish appropriate
Wear of contact surfaces may adversely affect these electrical
safety and health practices, and determine the applicability of
regulatory limitations prior to use. properties, especially in designs where the contact surfaces are
relatively thin coatings. This test method provides a means to
2. Referenced Documents
compare various material systems on a basis relevant to their
2
2.1 ASTM Standards:
application in electrical connector contacts.
B539 Test Methods for Measuring Resistance of Electrical
4.2 Repeated insertion and withdrawal of a connector may
Connections (Static Contacts)
3 cause wear or other mechanical damage to the electrical
2.2 Military Standard:
contact surfaces, rendering those surfaces more susceptible to
MIL-STD-1344A Test Methods for Electrical Connectors
environmental degradation. This test method is intended to
detect degradation of the electrical properties of the connector
1
This test method is under the jurisdiction of ASTM Committee B02 on
by such processes.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.11 on Electrical Contact Test Methods.
4.3 This test method describes procedures for conducting
Current edition approved April 15, 2009. Published April 2009. Originally
approved in 1988. Last previous edition approved in 2003 as B794 – 97 (2003).
wear and durability testing of electrical connectors; the proce-
DOI: 10.1520/B0794-97R09.
dures produce quantitative results. These results may be used
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
to compare the performance of different connector designs so
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
that meaningful design choices can be made. Such results may
the ASTM website.
also be used to compare the performance of a connector to a
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
previously established standard to evaluate the quality of the
Section D, 700 Robbins Ave., Philadelphia, PA 19111
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B794–97(Reapproved2003) Designation:B794–97(Reapproved2009)
Standard Test Method for
Durability Wear Testing of Separable Electrical Connector
1
Systems Using Electrical Resistance Measurements
This standard is issued under the fixed designation B 794; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 Thistestmethodcoverstheeffectsofrepeatedinsertionandwithdrawalofseparableelectricalconnectorswhichareharmful
to the electrical performance of the connector.
1.2 This test method is limited to electrical connectors designed for use in applications where the current through any one
connection in the connector does not exceed 5A, and where the connector may be separated a number of times during the life of
the connector.
1.3 This test method is limited to electrical connectors intended for use in air ambients where the operating temperature is less
than 65°C.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data
Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and
determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
B 539 Test Methods for Measuring Resistance of Electrical Connections (Static Contacts)Contacts)
3
2.2 Military Standard:
MIL-STD-1344A Test Methods for Electrical Connectors
3. Summary of Test Method
3.1 Sample connectors are wired for precision resistance measurements of each test contact. The samples are divided into two
groups; then resistance measurements are made of each test contact. The connectors in one group undergo a number of
insertion/withdrawalcyclesappropriatefortheparticularconnectorundertest,andtheresistancesoftheseconnectorsaremeasured
again. The connectors in the other group are not disturbed. All samples are subjected to an accelerated aging test; then the
resistances are measured again. All samples are separated (withdrawn), exposed to an accelerated aging test in the uninserted
condition, removed from the test, reinserted, and resistances measured again. The various resistance measurements are compared
to detect effects of the wear and aging on electrical performance.
4. Significance and Use
4.1 Materials for electrical connector contacts must satisfy a number of requirements in the areas of electrical, mechanical, and
economic characteristics.The stability of electrical properties is one of the most important of these characteristics.Wear of contact
surfaces may adversely affect these electrical properties, especially in designs where the contact surfaces are relatively thin
coatings. This test method provides a means to compare various material systems on a basis relevant to their application in
electrical connector contacts.
4.2 Repeated insertion and withdrawal of a connector may cause wear or other mechanical damage to the electrical contact
1
This test method is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.11 on
Electrical Contact Test Methods.
Current edition approved June 10, 2003. Published July 2003. Originally approved in 1988. Last previous edition approved in 1997 as B794–97.
Current edition approved April 15, 2009. Published April 2009. Originally approved in 1988. Last previous edition approved in 2003 as B 794 – 97 (2003).
2
Annual Book of ASTM Standards, Vol 03.04.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.19111-5098,
http://www.dodssp.daps.mil.
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