NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Language
NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–Cable Length Tester
The live cable tester is used to identify a specific cable to be found in a bundle of cables in the construction, transfer, maintenance and troubleshooting of wires and cables; it has the advantages of accurate and rapid identification of cables, easy operation, and wide application. . It is a cable live cable tester used to identify a specific cable to be found in a bundle of cables in the construction, transfer, maintenance and troubleshooting of wires and cables; it has the ability to identify cables accurately, quickly, and easily. wide range of advantages. It is an indispensable test instrument in the construction and maintenance of cable engineering.
Today, the editor will take you to understand the basic functions of the live cable identification instrument. The live/non-live cable identification instrument uses the single-chip microcomputer technology at the transmitting end to encode and power the transmitted signal, and drives the large-diameter caliper to couple the signal to the live cable. The single-chip computer in the receiver decodes and identifies the phase of the received phase-encoded signal.
The target cable is identified from a large bundle of other cables according to the signal phase characteristics on the target cable. It is a light, compact, lithium battery powered portable instrument. Suitable for various types of high and low voltage power cables. The cable identification instrument is composed of a cable identification transmitter, a cable identification receiver, a transmitting caliper, a receiving caliper and an output signal connecting line.
It has high-power current pulse output; on-site signal reception has clear characteristics, light and flexible, high sensitivity, and can effectively suppress on-site power frequency interference; accurate and fast judgment; reliable protection circuit, not afraid of output short circuit; large jaw ф125 is suitable for various cross-sectional areas There is a high-power isolation transformer inside, and there is no direct electrical contact between the operator and the mains, which greatly ensures personal safety. When the live cable is identified, it is not necessary to disconnect the connection between the two ends of each cable and the transformation and distribution equipment. Online identification can be carried out when the cable is live, which improves the efficiency of identification and greatly reduces the direct and indirect damage caused by power outages. economic losses. How to identify whether the live cable identification instrument is live? 1. Connect the output coupling clamps according to the color, use AC220V for the transmitting host or install 4 AA alkaline batteries, and connect the output clamp to the cable to be identified according to the direction of the clamp mark superior.
2. Turn on the power, the power indicator of the host is on, and the output indicator will flash the output display, indicating that the output signal of the transmitting host is normal. At this time, put the receiving flexible coil about 3 meters away from the transmitting clamp and also clip it on this cable, adjust the sensitivity, the receiving box will display the corresponding attenuation waveform and direction arrow indication; the setting remains unchanged, and other cables should not have this waveform display. The magnitude and direction will vary. receiver“O”When the position turns black, it means that a signal is received, and the receiver buzzer will sound once, and the number displayed in the middle will change. If the signal is valid, the corresponding direction arrow will be displayed.
Arrow position if displayed continuously“X”Or not triggered, indicating that the amplitude is too small and needs to be increased; it will be displayed when the battery is below 2.6V“undervoltage”, prompts you to replace the battery. If the signal is received continuously and irregularly, it means that there is interference, and the receiving amplitude needs to be reduced or the receiving position needs to be changed. 3. The setting remains unchanged, move the receiving coil and the receiving box to other positions of the cable, and the same cable is the same as the initial waveform direction and similar amplitude.
This method is suitable for situations where it is necessary to confirm that multiple cable identification points are the same cable.
Copyright © 2022 SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED - www.noyafa.net All Rights Reserved.