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–Cable Locator Suppliers
How to find the fault of the cable How to accurately judge the method of finding the fault of the cable Find the fault of the cable Cable is an important part of the signal equipment, but in the process of use, it is difficult for ordinary users to find the fault point, and they do not know the reason. Therefore, it is particularly important to quickly find cable faults and determine the fault point. The method of adjusting the wave speed of the cable fault tester Since the accuracy of adjusting the wave speed is closely related to the accuracy of the test, adjusting the wave speed becomes the key to solving the problem.
Accurate adjustment of the wave speed requires at least 2 conditions: ① the length of the cable to be tested; ② the cable to be tested has a good core wire, which is not connected to the ground. Adjust the measurement range and connect a good core wire of the tested cable of known length to The output port of the power cable fault tester is connected to the red clip line, the black clip line is connected to the ground, or is connected to another good core wire of the cable, and the measurement range is changed to match the actual length of the cable. If the actual length of the cable is less than 161.4m, the measurement range is adjusted to 161.4m; if the actual length of the cable is greater than 161.4m and less than 322.8m, the measurement range is adjusted to 322.8m, and so on. The preset wave speed is 200～220m /μSet a random wave speed between s and measure it as the wave speed of the initial test.
The initial measured wave speed is set at 200-220 m /μBetween s is because the signal cables usually used are generally in this range. This step is very critical. If this step is not set, the length of the cable measured at the beginning is very different from the actual length of the cable, and the next step is not easy to adjust. After adjusting the wave speed to measure the fault point distance, compare it with the actual cable length.
If the distance of the fault point displayed at the top of the screen is the same as the actual cable length, the wave speed set at the beginning, that is, the wave speed displayed on the screen, is the actual wave speed of the cable. The displayed fault point distance is not the same as the actual cable length, you can simply adjust the wave speed without moving the cursor, which can be large or small, so that the fault distance above the screen is the same as the actual cable length, then the adjusted wave speed It is the actual wave speed of the cable. When testing the fault of the cable, this wave speed can be used as the benchmark for testing. How to accurately judge how to find cable faults Find cable faults Shenzhen Noyafa Electronic Technology Co., Ltd.
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