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Electrical connector contact resistance test procedure

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Electrical connector contact resistance test procedure (tp-06a)
In the 23rd issue of this communication, the EIA specification for low order contact impedance test (tp-23a) was introduced, which is mainly applicable to connectors for signal transmission. In this issue, the contact resistance test is applicable to the connector for power transmission, and the current applied is much higher, which is the main difference.
1.0tp-06a contact resistance
2 purpose
The purpose of this test procedure is to detail the standard test method for contact resistance between electronic connectors and their mating points.
3 overview
4.0 preparation of test piece
4.1 the test piece shall be a pair of contacts, such as a pair of pins and sockets, a pair of contacts or the matching contacts of printed circuit board, etc.
4.2 the test piece shall be in the same condition as in normal use, and the wiring shall be careful not to be damaged. There shall be no wire mark or lubricant and other foreign matters between the wire and the contact.
4.3 unless otherwise specified, the test piece is under test.
I don't want to talk about it in any way.
Wash or add lubricant or paint.
4.4 if possible, the contact should be connected to 3 feet.
(1 m) long conductor to dissipate heat from the contact.
4.5 the test piece can be installed in the connector as it is in normal use, but if the test piece is not installed in the connector, the test piece shall not be forcibly fixed by other methods, so as to avoid that it may cause the stress of the mating contact and affect the contact resistance.
4.6 the voltmeter test bar can be prepared before the test, or the wiring of the meter can be directly welded or clamped on the circuit.
5.0 test method
5.1 test equipment
5.1.1 it is allowed that the reading value of the test current is more than half scale, and its accuracy shall be within 2%.
5.1.2 the accuracy of high impedance voltmeter (about 10, 000 Ω / V) shall be within 2%.
Note: in order to measure the positive and negative voltage, it is recommended to use a voltmeter with the center indicating zero potential or a voltmeter with automatic polarity switching.
5.1.3 a suitable adjustable output current source to provide the test current specified by the specific specification. The contact resistance can be tested by AC or DC power supply | voltage regulator | voltage regulator. When the AC power supply is used, the frequency shall not exceed 2KHz. When there is a difference between the measured results of AC power supply and DC power supply, the value of DC power supply shall prevail. The voltage value of the power supply shall not exceed
The peak value of 60V DC or AC shall not be less than 1V. 5.1.4 connector of test equipment 5.2 test procedure refer to figure 1
5.2.1
Before adding current, the test piece is as shown in the figure.
1 connection.
5.2.2 after the circuit is connected, add the current to the specified value.
5.2.3 if the wiring of voltmeter is not directly connected to the circuit, use voltage drop and record it. If it is impossible to directly measure the contact specified in the specification, the measured value shall be reduced to the resistance of the cable or wire for correction, but the measured value and
Record the corrected value together and check whether the current is the correct value.
5.2.4 if the measured reading value is less than 1mV DC, reverse the current, measure the voltage again, and take the voltage measured in the forward and reverse directions as its uniform value to eliminate the influence of thermoelectric potential.
5.2.5 move to the power supply and remove the test piece.
6.0 details to be recorded - shall include the following:
(a) pre preparation of test piece (if there is special need for pre preparation).
(b) type and size of wiring.
(c) test current.
(d) specified voltage drop (MV).
(E) number of test pieces.
(f) pre treatment or special test environment requirements.
(g) Y-Y interval
7.0 documentation - the test report shall include the following:
(a) test designation.
(b) description of test piece and installation method.
(c) test procedures used.
(E) observation and measurement results.
(f) the date of the test and the name of the person tested.
Adjustable current source
Ammeter
Distance Y-Y*
Voltmeter
Paired specimen
Double pole double throw reversing switch
(for reversing)
*Y-Y points are usually specified at 3 / 8inch (9.5mm) after each point, or fixed as 6inch (15.2mm) apart from each other. Since there may be accessories in the connector, a short distance should not be used.

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