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The cable fault tester is composed of a transmitter and a receiver, an inductive probe, and a potential difference detection frame. The instrument uses Electromagnetic induction method to carry out route tracing and buried depth test on optical cable cables, and adopts potential difference method to perform fault location test on optical cables and cables. It is applicable to the positioning test of various optical cables and cables with metal conductors (wire pairs, sheaths, and shields), route of cables, depth of burial, and poor insulation of ground. It is a line fault special tester for post and telecommunications systems, as well as for railways, mines, oil fields, airports and shipping.
What must be a good cable fault tester?
First, it requires a high degree of intelligence. The test results can be automatically displayed on the large-screen LCD screen. This intuitively judges the fault and is equipped with a menu display operation function. No special training is required for the operator. It can be that they are easy to use.
Second, it has the function of wave opening and parameter storage and recall. With non-volatile devices, waveforms and data are not lost after shutdown.
Third, it has a dual-track display function. The test waveform of the faulty cable can be compared with the normal waveform, which is helpful for further judgment of the fault.
Fourth, it has a waveform scaling function. Change the waveform scale to expand the waveform for accurate testing.
Fifth, control the measurement cursor to automatically search along the line and automatically stop at the inflection point of the fault waveform.
Sixth, the position of the double cursor can be arbitrarily changed to directly display the direct distance or relative distance between the fault point and the test point. Seventh, it has a print function. Print out the results of the test.
Common faults and precautions during use
1. During the pulse method test, be careful to get rid of all the equipment in the office and make measurements on the outermost line.
2. When using the flash method test, the trigger mode switch must be placed in the "flashover" position.
3. When using direct flash or flash test, pay attention to personal safety and equipment safety. Must be connected to the ground.
4. After the flashover test is completed, cut off the power supply, remove the connection line between the instrument and the high-voltage test device, and discharge the charge stored in the high-voltage capacitors and cables. When discharging, the current limiting resistor R should be added to limit the discharge current so that the current can be slowly discharged. After the voltage on the capacitor is reduced, the resistance in the discharge circuit directly to ground is zero, and the instantaneous discharge current can be as high as several hundred amps. Equipment or personal accident.
5. During the direct flash method test, attention must be paid to monitoring the leakage current of the fault. If the current suddenly increases and the flashover phenomenon does not occur, the test voltage should be reduced immediately and the flashover test should be used instead.
Enter cable fault tester for cable fault tester
A high-quality cable fault tester in the cable test industry can reduce the labor intensity of workers and improve work efficiency.