4-Wire cable tester MICROTEST 8761 series

Price: Contact

Model	8761FA / 8761NA / 8761N
Manufacturer	MICROTEST
Power supply	115/230 Vac ±10%
Weight	8.44Kg - 14Kg
Size	435x145x406 mm - 435x190x406 mm
Condition	Stocking
Warranty	12 months

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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.

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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

4-wire-cable-tester-microtest-8761-series

Conductance test:

Conductance

Detect the contact resistance in the cable connector.

The conduction resistance is over the standard.

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Open test/ Short test:

Open/Short test

Make sure the contact of wire work properly.

Open: The wire should be contact, but it doesn’t

Short: The wire shouldn’t be contacted, but it does.

Intermittence O/S

Make sure the cable has intermittent open/short defection

There is damage on part of cable, that cause instant contact or not.

4-wire-cable-tester-microtest-8761-series

AC/DC Hipot test:

Hipot test

Put a stabile high voltage on cable to make sure the quality of DUT

· DC insulation

The result will judge by the rate of insulation resistance. Insulation resistance defect may cause DUT be penetrated or leakage current under high voltage.

· Arc test.

Some high precision product for automobile and military can’t accept any arc under high voltage.

Inspect the loop contact in the connector fit the request of insulation and voltage.

Insulation resistance between loop is lower than the standard.

The voltage resistance is lower than the standard that cause leakage current.

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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.

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Component test - R/C/D:

Resistance test
Capacitance test
Diode test.

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Technical specifications of 4-Wire cable tester MICROTEST 8761 series

8761 Series
Model	8761FA	8761NA	8761N
AC Hi pot Test	100V-1000V	100V-700V	–
DC Hi pot Test	50V-1500V	50V-1000V	50V-1000V
Test Pin	64/128/256

Safety Hi pot Test
AC Hipot Leakage Current	0.01mA -5mA
AC Arcing Detection	0-9
DC Hipot Leakage Current	0.1µA-1000µA
DC Arcing Detection	0-9
DC Hipot Insulation Resistance	1MΩ-1.2GΩ
Hipot Output Accuracy	±5%
Hipot Measurement Accuracy	±5%
Rated Output	5Vdc
Hipot Measurement Time	0.01seconds – 60seconds
Wire Specifications	Maximum allowable capacitance 5μF
Low Voltage Electrical Test
Measuring Mode	4-Wire Test
Conductance	1mΩ-52Ω
Intermittence Conductance	1mΩ-52Ω
O/S Intermittence O/S Quick Intermittence open circuit	1kΩ-100kΩ
O/S Determinal Judge	●
Single-Side Test	●
Component test
Resistance	Measurement Range	50mΩ-20MΩ
	Level Signal	0.5-3V
	Current Signal	10mA
Capacitance	Measurement Range	10pF-12µF
	Level Signal	0.3V-1.2V
	Frequency Signal	AUTO Gear (Optional) AUTO Gear (Optional)
Diode	Measurement Range	0-6.8V
Other Function
Advanced Functions	Programmable continuous test / Pin search/Auto-diagnosis
Test Scan Mode	Auto, Manual, External Trigger
Measurement Signal	Low Voltage Measurement Signal
Panel	System/Rapid /Edit / Function
Indicator	Pass/Fail HV LED red-green indicator lights / Screen Display /Sound

System:

Operation	Manual, Auto, Remote Control
Built-in Storage	Number of test file up to 500 sets
Power Supply	Fixed Voltage	115/230 Vac ±10%
	Frequency	60/50Hz
Power consumption	300VA
Environment	Temperature	0℃-40℃
	Humidity	RH≦75%
Display	320*240 dot-matrix display
Dimension (WHD)	64PIN 435x145x406 mm	128PIN 435x145x406 mm	256PIN 435x190x406 mm
Weight	8.44Kg	9.3Kg	14Kg
Interface	RS-232, USB Host, Print, Remote