4-Wire cable tester MICROTEST 8761 series

4-Wire cable tester MICROTEST 8761 series with testing capabilities include: continuity impedance, open/short circuit, AC/DC safety withstand voltage, IR insulation, and component testing (resistor/capacitor/diode).

I. Specification of 4-wire cable tester equipment MICROTEST 8761 series

4-Wire cable tester MICROTEST 8761 series employs precise four-wire measurement technology to perform comprehensive electrical characteristic tests on wire harness products, meeting the low resistance level of 1mΩ.

The testing points can be selected from 64/128/256 options, with a maximum AC withstand voltage output of 1000V and a maximum DC withstand voltage output of 1500V.

MICROTEST 8761 supports PC connectivity software and BAR Code scanning, meeting the requirements for automated line testing in wire and connector production.

• 4-wire measurement. Cond resistance 1mΩ-52Ω
• Test pin 64/128/256
• Number of test file up to 500 sets
• The measurement items: Open/Short, Conductance, Components, AC Hipot, DC insulation/Hipot, Quick conductance, Intermittence O/S, and Quick Intermittence open circuit.
• Multiple DUT test-4 (standard)/ expand 14 (option)
• USB Host storages setting files and can update firmware
• Support bar code scan and print function
• External current expand box for wire buck measurement
• Automatically identify the normal or reverse plugin of wire or connectors.

Application of MICROTEST 8761 series:

• All kinds of wires, connectors and combined products of connectors and wires.

II. Features of 4-Wire cable tester MICROTEST 8761 series

4-Wire test:

• Connect to DUT directly to prevent any deviation.
• For measuring low resistance DUT, we recommend to choose 4-wire tester.

Test functions:

• The measurement items of 8761 cable or harness tester have (1) Open/Short;(2) Conductance; (3) Components; (4) AC Hipot; (5) DC insulation/ Hipot; (6) Quick conductance (7) Intermittence O/S, and (8) Quick Intermittence open circuit. It supports RS-232, USB Host, Print, Remote interfaces

Conductance test:

Open test/ Short test:

AC/DC Hipot test:

All ground test method:

• Ground pin must be set for this mode to perform insulation test for non-grounded cable to specified grounded cable; its advantage is that the test speed is fast, but its disadvantage is that insulation test is not performed between non-grounded cables.

Quick binary test method:

• This mode is similar to quick categorization; if there are 8 test pins test DUT A B C D E F G H, when test is performed for each cable or pin, it has to be tested 7 times sequentially in order to determine whether the test DUT passed. But if the quick test method is used, the first time A B C D and E F G H are divided into two groups for testing, and the second time A B E F and C D G H are divided into two groups for testing, and the third time A C E G and B D F H are divided into two groups for testing, then the test only needs to be performed three times to confirm whether the test DUT passed.
• Therefore, if the test DUT has 128 pins, and if test is performed for every cable or pin, the test has to be performed 127 times; with the quick test method, the test only has to run 8 times. However, the disadvantage is that it cannot find out which are the error pins and the cable segment resistance will be slightly lower than the actual value because of the cable segments were tested in parallel.

One to other test method:

• This is the most fundamental test method for high voltage insulation test. High voltage is connected to the test pin A and the other pins are grounded to observe its current leakage or insulation value, and then high voltage is connected to test pin B and the other pins are grounded to observe its current 60 leakage or insulation value and so on.
• High voltage is connected to each pin while other pins are grounded to observe their current leakage or insulation value. This way it can confirm that all the test pin high voltage insulation test have no problems, and the number of tests for this method is N-1 times. This test method is more accurate and it can find the insulation and current leakage value for each pin; its disadvantage is that it is slower.

Component test - R/C/D:

• Resistance test
• Capacitance test
• Diode test.

Technical specifications of 4-Wire cable tester MICROTEST 8761 series

System: