NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–CCTV Tester
Cable fault tester is an intelligent product, a kind of intelligent high-tech product. Cable fault tester, as its name suggests, is an important new type of detection tool that uses multiple fault detection methods to check line faults and maintain various cables. It can be said that the cable fault tester is an intelligent product, a kind of intelligent high-tech product. The cable fault tester, as the name suggests, is an important new detection tool that adopts a variety of fault detection methods to check the fault of the line and maintain various cables. . It can be said to be a smart product, a smart high-tech product.
When using the cable fault tester, we should pay attention to some details, and we will introduce it to you. Judgment cannot be made only by relying on the data obtained by the instrument, but also the actual situation, such as historical failures, and the situation of the joints. If suspicious spots are observed on the surface of the cable, the correct record after the installation and laying of the cable is completed should be consulted.
The optimal position of the tee joint, the direction of the cable path, in the underground relationship, the situation of a cable to other cables or joints, and the optimal position of the two cables with different cross-sectional areas to the joint. When operating the cable fault tester, you must pay attention to the details, which are related to the problem, and you cannot completely rely on the cable fault tester. In some places, you still need to check it yourself before you can rest assured. The cable fault tester is a method of detecting faults for buried line faults.
First of all, it is generally necessary to understand the relevant situation of the fault, and then conduct a comprehensive analysis to find out the cause of the fault, and then find and eliminate it in a targeted manner. For example, finding informed parties, such as construction personnel, wire users, and other relevant personnel, to understand the situation in detail, and it is often possible to eliminate the fault in the shortest time at a relatively small cost. Since there are buried cables, the detection of cable faults has become an urgent problem to be solved.
The initial rough detection of cable faults was carried out using the bridge test principle. At that time, resistance bridges, capacitor bridges, low-voltage bridges, and high-voltage bridges were used. Using the bridge principle to test the cable fault distance was a commonly used method in the 1960s and 1970s. In the 1970s and 1980s, the flash test method was generally used for cable fault testing, and the principle was the pulse reflection method.
The instruments used are oscilloscope tube type flash tester, storage oscilloscope tube type flash tester and so on. After the 1990s, with the widespread application of computer technology, cable fault testers have been put into use, and the test principle used is still the pulse reflection method. The flash tester used is from the picture tube display to the liquid crystal display, and is generally controlled by a single-chip microcomputer. The cable fault tester makes the rough measurement of cable faults enter a new realm.
The advantage of the analysis and judgment of the cable fault tester is that it is simple and easy to operate, does not require complex instruments, and can eliminate some faults in time. For buried lines with a length of more than 100 meters, in the absence of instruments, human analysis and judgment are required to find faults. Sometimes more than ten places are excavated, and it takes more than ten days to find the fault point. The appearance of the cable fault tester solves this problem. Generally, this method is not used alone, but is used in conjunction with other instrument detection methods.
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