MICROTEST 8740 series Cable Harness Tester employs two-wire measurement technology and is suitable for products that do not require very low resistance measurements, considering the cost factors of the testing fixture. The testing capabilities include continuity impedance, open/short circuit, AC/DC safety withstand voltage, IR insulation, and component testing (resistor/capacitor/diode). The testing points can be selected from 128/256/512 options, with a maximum AC withstand voltage output of 1000V and a maximum DC withstand voltage output of 1500V. It supports PC connectivity software and BAR Code scanning, meeting the requirements for automated line testing in wire and connector production.
Selection
| 8740 Series | |||
| Model | 8740FA | 8740NA | 8740N |
| AC Hi pot Test | 100V-1000V | 100V-700V | - |
| DC Hi pot Test | 50V-1500V | 50V-1000V | 50V-1000V |
| Test Pin | 128/256/512 | ||
SPEC
| 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 | 0.01秒 - 60秒 | |
| Wire Specifications | Maximum allowable capacitance 5μF | |
| Low Voltage Electrical Test | ||
| Measuring Mode | 2-Wire Test | |
| Conductance | 100mΩ-52Ω | |
| Intermittence Conductance | 100mΩ-52Ω | |
|
O/S Intermittence O/S Quick Intermittence open circuit |
1kΩ-100kΩ | |
| O/S Determinal Judge | ● | |
| Single-Side Test | ● | |
| Component test | ||
| Resistance | Measurement Range | 100mΩ-2MΩ |
| Level Signal | 2.4V (Fixed) | |
| Current Signal | 35mA | |
| Capacitance | Measurement Range | 10pF-3µF |
| Level Signal | 1.2V (Fixed) | |
| Frequency Signal |
AUTO Gear (Fixed) 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 | 0℃-40℃ | |
| Humidity | RH≦75% | ||
| Display | 320*240 dot-matrix display | ||
|
Dimension (W*H*D) |
128PIN | 256PIN | 512PIN |
| 435x145x406 mm | 435x145x406 mm | 435x190x406 mm | |
| Weight | 8.44Kg | 9.3Kg | 14Kg |
| Interface | RS-232, USB Host, Print, Remote | ||
MICROTEST 2-Wire Tester 8740 Series insert port
The measurement items of 8740 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 | Detect the contact resistance in the cable connector. The conduction resistance is over the standard. |
| 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 |
| HI pot Test |
Put a stabile high voltage on cable to make sure the quality of DUT
The result will judge by the rate of insulation resistance. Insulation resistance defect may cause DUT be penetrated or leakage current under high voltage.
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.
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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.
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.
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.
Standard Accessories
| Power Cord | |
| Fixture Flat Cable (AK-8600F2)-8740FA |  |
| Fixture Flat Cable (AK-8600F1)-8740NA/8740N |  |
| Adapter board (8730-J2) |  |
Optional Accessories
| PC Link Software | |
| Calibration Kits (KB-8740K1) |  |
| Multiple DUT Testing Expand Box (874001) |  |
| Adapter board (FX-000C16) |  |
| Universal Fixture Board (FB-8600M1) |  |
| Intermi ence O/S Fixture (FX-000C18) |  |
| Networking Fixture |
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| Foot Switch (7600010) | |
| Printer | |
