4-Wire cable harness tester MICROTEST 8761K series

Price: Contact

Model 8761NAK / 8761NK
Manufacturer MICROTEST
Power supply 115/230 Vac ±10%
Weight 18 Kg
Size 435 x 270 x 360 mm
Condition Stocking
Warranty 12 months

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

I. Specifications of 4-Wire cable tester equipment MICROTEST 8761K series

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

The testing points are selectable up to 512 points, with a maximum AC withstand voltage output of 700V and a maximum DC withstand voltage output of 1000V.

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

  • 4-wire measurement, conductance resistance: 1mΩ-52Ω
  • Low resistance scanning test 10mΩ-52Ω
  • Test pin 512
  • Number of test file up to 500 sets
  • Open/Short
  • Conductance resistance test
  • AC/DC Hipot Test
  • DC insulation
  • Support bar code scan and print function.

Application of MICROTEST 8761K:

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

II. Main features of 4-Wire cable harness tester MICROTEST 8761K series

4-Wire test:

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

Conductance

Detect the contact resistance in the cable connector.

The conduction resistance is over the standard.

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

Low resistance scanning test 10mΩ-52Ω:

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.

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

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

 

Common production defect:

  • Insulation layer or dislocation might happen during manufacturing process. That may cause poor connection or insulation.

Electrical Inspection:

  • Conductivity test: Detect the contact resistance problem on the terminal
  • Hipot Test: Detect the circuit contact fit the insulation value
  • Resistance Test: Detect the O/S problem on the contact point of the terminal.

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

Safety test- HI POT test & insulation resistance 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.

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

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.

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

Component test - R/C/D:

  • Resistance test
  • Capacitance test
  • Diode test.

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

Technical specifications of 4-Wire cable harness tester MICROTEST 8761K series

8761K Series

Model

8761NAK

8761NK

AC Hi pot Test

 100V-700V

DC Hi pot Test

 50V-1000V

 50V-1000V

Test Pin

   512

 

Safety Hi pot Test

AC Hipot Leakage Current

0.01mA -5mA

AC Arcing Detection

Jan-48

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

0.01second – 60second

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

Low resistance Scanning

Measurement Range

10mΩ-52Ω

Current Signal

10mA

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)
48Hz/480Hz/4.8kHz/48kHz

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

15℃-35℃

Humidity

RH≦70%

Display

320*240 dot-matrix display

Dimension(W*H*D)

435x270x360 mm

Weight

18kg

Interface

RS-232, USB Host, Print, Remote

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