General knowledge of selection of wire tester

　　1. Wire testing machines, generally three types now,

　　 The first type; is to test the conduction, misalignment, short circuit, and open circuit. The advantages can accurately judge the AB end failure, and the price is favorable. The speed is fast, and the results are more intuitive to view on the large screen.

　　 The second type; one more unilateral test/insulation/high voltage and other functions; this kind of tester is used for earphone cable more, the test speed is faster than the ordinary high-voltage instruments on the market, and the AB end judgment is more accurate.

　　 The third type; it is used to test electronic wires with components. The four-wire test method is used to accurately measure the parameters of the components!

　　 2. Product description

　　 Wire tester (low-voltage type), the advantage can test the components in the wire, the test speed is more than twice as fast as the traditional instrument, and it provides test functions such as unilateral, on-resistance editing and spot measurement color editing.

　　 3. Installation of wire testing machine

　　 (The shell of the tester must be grounded to prevent electrostatic interference)

　　A. Please confirm the power supply of the power supply, and the power supply is AC115V or AC220V. (Please pay attention when using 115V voltage);

　　B. When the power is turned on, the system will perform self-test. When there is no fixture or the fixture is in good condition (it has no bad insulation! Open circuit or short circuit), all self-tests will show OK.

　　 4. Common faults and solutions

　　 Problem 1: The wire testing machine will make a misjudgment when testing a relatively long wire harness

　　 Solution: Increase the short circuit break judgment value in the setting, and jump to the specification position where the short circuit break can be judged. The specific value needs to be debugged.

　　 Problem 2: When testing one side, it is often encountered that the test is not accurate enough, or the side splitting in the test is not accurate

　　 Solution: Shorten the line in the middle of the transfer fixture, and the transfer line should be less than 15CM. The same judgment on the side of the open circuit is the same. Shorten the adapter cables at both ends, so the accuracy will be much higher.

　　 Problem 3: When the debugging is completely normal, it is found that the wire cannot be automatically tested

　　 Solution: Check the fixture. A common problem is that the adapter fixture is short-circuited. You can pull out the test harness and the tester self-checks to detect whether there is a problem with the adapter fixture.

　　 Problem 4: The test method with a larger resistance added to the wiring harness and the problems encountered during the test

　　 Solution: If a resistor is added to the wiring harness, the range of on-resistance will be exceeded. You can open the component test in the test project, and enter the component editing. Edit resistance. Use the probe to find the point on the 2 end of the resistor and edit it. Automatic learning. It can be tested. Pay attention to the fact that the hand touches the resistance when the error is prone to occur in the process of testing the resistance.