Fault tester characteristics Technical characteristics of cable fault tester Fault tester characteristics 1. Fault test system software: It can detect various common faults of various wires and cables, as well as lead and short circuits of coaxial output power cables and local communication cables. Faults are common faults. Length measures the rate at which electromagnetic waves propagate in all known cables. Detection distance is not less than 16 kilometers 2. Relative path signal generator: output data signal frequency 30KHz, oscillation method, intermittent 3. Detector: detection sensitivity: 50ΩThe video signal of the internal resistance outputs a 300Hz data signal, and the specified instrument keeps the output at 2V and the signal-to-noise ratio is better than 20:1. The input data signal does not exceed 10μv.
Input impedance: not less than 1.2KΩ. Fault test method: The fault test is generally divided into the following several processes: First, find out the basic situation of the common faulty cable: use a shaker and a multimeter to measure the grounding resistance of the common faulty cable, and use the bottom pressure single pulse to accurately measure the cable. Total length, whether there is disconnection, short-circuit fault, etc. Second, determine the appropriate detection method according to the details of common faults, and accurately measure the distance between cable faults.
Generally people put disconnect common faults and resistance measurements at 100ΩThe following cable faults are called low-resistance (lead) common faults, which are detected by the bottom pressure single-pulse method. Other common faults are detected by the flash-over method or the direct-flash method. Third, detect the relative path and depth of cable laying around common fault points. Identify the precise location of common failure points.
Before testing, disconnect all connections between the head of the cable and the head of the terminal device. Inspection system software control panel with“Type the amplitude”and“offset”2 knobs, each used to adjust the left and right parts of the input data signal strength and waveform of the next sampling. Technical Characteristics of Cable Fault Tester Fault Tester Characteristics Shenzhen Noyafa Electronic Technology Co., Ltd.
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