NOYAFA's Professional Network Tool Kit

NOYAFA's Professional Network Tool Kit

2021-11-04
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During the production of professional network tool kit, SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED makes efforts to achieve high quality. We adopt a scientific production mode and process to improve the quality of the product. We push our professioanl team to make great technical improvements and meanwhile pay great attention to the production details to ensure that no defects come out from the product.We deliever NOYAFA products to express an ethos and a point of view, an identity and a purpose, which define and differentiate ourselves in the marketplace. And we are always building internal and external capabilities to deliver superior quality products under this brand that consumers love — with improved success rate, value creation, and speed to market. Through all these, NOYAFA brand is recognized worldwide.We have made great efforts in providing customers with top-notch and proactive service shown at Best Cable Tester Supplier in China _ Noyafa. We provide constant training for our service team to equip them with abundant knowledge of products and right communication skills to effectively answer customers' needs. We have also created a means for the customer to give feedback, making it easier for us to learn what needs improvement.
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Cable Tester to Test Your Home Network
Cable Tester to Test Your Home Network
The introduction of cable testerA cable tester is a market expert who looks into a specific product and finds flaws in it. They are usually looking for products that are either faulty or un-performing, so they make sure to find out which product is the most likely to break. Although, their job is not necessarily related to the product itself, but they look for any sort of issues with the basic properties of an item.Tips for cable testerA cable tester is a person who reviews the quality of cables in different locations and makes sure that they meet the standards. They do this by making inspection decisions, often at short deadlines.The most important thing to remember while reviewing cables is that no part of a cable should touch the ground or any of its power sources because doing so can affect the performance and reliability of cables in those places. In addition, when inspecting cables for damage, there should be other requirements as well - for example, according to ISO-IEC 61631-1 (or equivalent) standard, cable manufacturers have to report any kind of deviation from safety standards.How to use cable tester?This page will provide you with information on the best way to use cable testers.In this article we are going to discuss about how to use cable testers and their pros and cons.The specifications of cable testerThe cable tester is a very important part of the electronics system and it's always in high demand. Also, the industry experts are always looking for more information on this subject.The product instructions of cable testerIt is now possible to test cable products, determine the quality of their performances and reviews, without having to physically go inside the box.##Section topic: Movies and television series of the next generationIntroduction: “The new generation” refers to all people born after 1985 and up. The biggest trend in this context is the increase in the number of young viewers who are looking for different kinds of content. This creates a big opportunity for film makers and television producers. For example, recent films such as "Black Panther" have been successful because they capitalized on this trend by making a character who was not like other characters that had appeared before. It seems that there is an opportunity for movie makers to get inspiration from these trends in order to create feature oriented movies. The same applies forThe application of cable testerThe application of a cable tester is a process that an electrician uses to check the wire and cable system in a building or industrial site before the building is occupied.
Design Features of Cable Fault Locator
Design Features of Cable Fault Locator
Cable fault locator is a set of comprehensive cable fault detection instrument. It can test the faults such as high resistance flashover fault, high and low resistance grounding, short circuit, cable disconnection and poor contact. The cable fault locator is equipped with an acoustic pointing instrument, which can be used to accurately determine the accurate position of the fault point. It is especially suitable for testing power cables and communication cables of various models and different levels of voltage. The cable fault locator adopts a variety of detection methods and applies the achievements of contemporary advanced electronic technology. Using computer technology and microelectronics technology, it has the characteristics of high intelligence, complete functions, wide range of use, accurate test, convenient use and so on. It is very important in civil aviation maintenance to detect aircraft cable fault; According to the characteristics of aircraft cable, a method that can effectively test and diagnose it, low voltage pulse method, is proposed, and an aircraft cable defect detection and positioning device is designed by using single chip microcomputer and CPLD technology; The positioning instrument is mainly composed of three parts: signal acquisition circuit, system control circuit and human-computer interaction circuit; At the same time, two sets of product vibration are adopted, which not only ensures the high-speed signal acquisition, but also meets the low-speed processing of the system. It has the characteristics of low cost, portability and dexterity, accurate test and so on; At the same time, in addition to being applied to aircraft cable maintenance, it can also be further applied to short-distance cable testing and defect detection in telecommunications, electric power and other departments. Dear customers: Hello, our company is a high-quality development group with strong technical force, providing users with high-quality products, complete solutions and superior technical services. The main products are intelligent cable fault tester, underground cable fault tester, street lamp cable fault tester, etc. The enterprise adheres to the tenet of building a business in good faith, keeping the business with quality and developing the business with enterprising. It continues to climb new peaks with a firmer pace and make contributions to the national automation industry. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
Principle and Application of Cable Oscillation Wave Test
Principle and Application of Cable Oscillation Wave Test
1、 Principle of cable oscillation wave test through cable oscillation wave test can not only diagnose the overall insulation of cable, but also test partial discharge and locate defects. The principle is LCR damping oscillation principle. On the basis of completing the cable pressurization, a damping oscillation voltage wave is formed through the built-in high-voltage reactor, high-voltage solid-state switch and the test cable. A sinusoidal voltage wave similar to the power frequency is applied to the test cable to excite the partial discharge signal at the potential defect of the cable. Based on the pulse current method, the partial discharge signal is detected with high sensitivity, and the detection, acquisition and upload of partial discharge signal are completed with high-speed data acquisition equipment. The single test process is about one minute, with high test efficiency and no damage to the tested cable. On the basis of obtaining the partial discharge data, the data analysis software automatically completes the cluster analysis and traveling wave positioning, which is convenient for users to comprehensively evaluate the cable state. 2、 Purpose: the cable oscillation wave test standard passes the field test to check the insulation condition and internal partial discharge condition of the cable without damaging the insulation of the cable itself, so as to evaluate the cable insulation. The high voltage unit of cable oscillation wave test can generate oscillation wave high voltage signal, and the high voltage generator can generate any high voltage of 0-30kv; For the partial discharge test device with no blind area from the partial discharge signal, there is no blind area, and it can detect the cable below 250m for partial discharge test; One laptop can be used for control; External safety control units such as operation software (Chinese / German / English version); Analysis software (Chinese / German / English version); A 7.5m high-voltage connecting line without partial discharge, with anti falling off safety design; The partial discharge under system voltage is less than 1pc III. cable oscillation wave test case analysis through the above understanding, let's talk about examples below, so that you can better understand its actual field use. Firstly, connect the test line according to the instructions, and then turn on the power supply. The waveform diagram during the test is as follows: through a waveform analysis, we found a damaged gap in the outer sheath at about 132M in the field survey, which is the cable insulation damage caused by external construction force. After disassembly, the main insulation is damaged
Application Scope of Underground Pipeline Detector
Application Scope of Underground Pipeline Detector
Underground pipeline detection method is one of the commonly used geophysical detection methods. Generally, there are two methods: the first is to use DC detection method for geophysical detection. Specifically, in the process of detection, two power supply electrodes are mainly used for corresponding DC power supply, and a power supply cycle is formed underground, Through the circulating power supply to ensure the measurement of underground current density, we can effectively judge the specific location of buried metal pipelines. Generally, the detection using this method is mainly based on the corresponding metal pipeline. This method is based on the difference of current density. Generally, the most commonly used method of this technology is the high-density resistivity method for corresponding measurement. For example, during the measurement of underground pipelines in a city, the direct current detection method is used for geophysical detection, and the location of metal pipelines in concrete materials is effectively found; The second method is to use the alternating current detection method for geophysical detection. Specifically, in the process of detection, the corresponding conductivity and corresponding magnetic transformation generated by the alternating current in the process of magnetic field transformation are mainly used. In the process of detection, the corresponding underground pipelines are detected through the magnetic field formed by the alternating current, So as to effectively ensure the accuracy of underground pipeline detection. Through the use of alternating current detection method for geophysical exploration, we can effectively find the differences between underground media, and find out the specific problems and sources of these differences through the analysis of these differences. Specifically, these methods have the characteristics of uniform measurement and long working time. They are one of the effective means for underground pipeline detection.
Main Features of Cable Fault Tester
Main Features of Cable Fault Tester
Cable fault tester is a comprehensive cable fault detection instrument. It can test the cable flashover fault, low resistance grounding, short circuit, cable disconnection, poor contact and other faults. If equipped with an acoustic point detector, it can accurately determine the position of the fault point. It is especially suitable for testing power cables and communication cables of various models and different levels of voltage. The cable fault tester has the following remarkable characteristics: 1. It has complete functions and can test faults safely, quickly and accurately. The instrument adopts low-voltage pulse method and voltage flashover method for detection, which can test various faults of cables, and directly test the flashover and resistance faults of power cables without burning through. If equipped with a sound point meter, the position of the fault point can be measured accurately. 2. Test accuracy. The instrument adopts fast data sampling technology with a reading resolution of 1m. Degree of intelligence. The test results are automatically displayed on the large screen LCD with small and data, and the fault judgment is intuitive. It is also equipped with menu display operation function, without special training for operators. 3. It has the functions of wave opening, parameter storage and call out. Nonvolatile devices are adopted, and the waveform and data are not volatile after shutdown. 4. With dual trace display function. The test waveform of the faulty cable can be compared with the normal waveform, which is conducive to further judgment of the fault. 5. With waveform scaling function. By changing the waveform proportion, the waveform can be expanded for testing. 6. Control the measurement cursor to automatically search along the line and stop automatically at the inflection point of the fault waveform. 7. The position of the double cursor can be changed arbitrarily to directly display the direct distance or relative distance between the fault point and the test point. 8. With printing function. Print and archive the test results.
Precautions for Optical Fiber Test and Installation
Precautions for Optical Fiber Test and Installation
Although optical brazing can provide a large bandwidth, its performance will be compromised if it is not deployed properly. Therefore, for enterprises with optical brazing needs, the author has the following suggestions.1、 Try to avoid macro and micro musicOptical brazing, like ordinary network cables, will also have signal degradation. Network cable is mainly caused by signal decay due to distance, while for optical fiber, it is mainly caused by improper installation. For example, if the optical fiber is stretched or bent too much, it may cause the fiber core to crack and have small cracks. A direct consequence of this is that light will scatter, resulting in signal attenuation. In addition, if the bending angle of the optical fiber is too large, the incident angle of the optical fiber contacting the core cladding interface will be changed. This makes the incident angle less than the critical angle of the total reflection angle. Note that at the bend, some optical signals cannot be reflected, but refracted into the covering layer and lost directly. Reflection, refraction, these professional terms may be difficult for readers to understand. In short, when deploying optical fiber, network administrators need to avoid the following two situations as far as possible.One is Hongqu. Macro area generally refers to the bending visible to the naked eye. Gently pull the optical fiber, you can see that the optical fiber is broken and sunk, as if it had been pressed by a heavy object. When the administrator accidentally bends the optical fiber, part of the light exceeds the critical angle, resulting in the light leaking out of the fiber core and into the covering layer. In general, once the light enters the cladding, it is difficult to return to the core again (even if it can, it is abandoned because the cost is too high). Usually, it will leak out directly through the buffer layer.The second is micro music. Micro bending and macro bending have the same reasons, which will cause the optical signal to exceed the critical angle and leak out of the fiber core. However, the external performance is different. The existence of Hongqu can generally be judged by the naked eye. In case of micro curvature, the amplitude of occurrence is very small, which is difficult to be found by the naked eye. In other words, general bending (such as rounding the optical fiber) does not necessarily lead to micro bending. Only bending under certain conditions can lead to micro bending.So in practice, how to avoid these two situations? A relatively simple method is not to press heavy objects on the optical fiber. Because of the long-term backlog of heavy objects, it is easy to cause optical fiber deformation, macro bending phenomenon and affect the transmission of optical fiber signal. In addition, when deploying optical fiber network, it is best to carefully observe the appearance of optical fiber. Because if macro music occurs, the appearance is obvious, which can be seen directly from the appearance (obvious backlog traces). If so, it's best to abandon this and optical fiber.Secondly, because the micro curvature is difficult to be observed by the naked eye, the help of the instrument may be needed at this time. Connect a test instrument at both ends of the optical fiber, and then you can check the attenuation degree of the optical fiber. If it is within the range allowed by the user, there is no problem if a little macro or micro music occurs. However, if its performance has been seriously affected, the optical fiber needs to be replaced.2、 Pay attention to whether there is an inner tube when purchasing optical fiberThe attenuation of optical fiber signal is largely related to its installation. Improper installation may lead to micro bending or macro bending. In order to avoid this situation as much as possible, many optical fiber manufacturers will add a layer of "inner tube" material to the optical fiber. The utility model relates to a material for stretching pipes, which can effectively avoid excessive bending of optical fibers.In terms of hardness, the inner tube is much harder than the optical fiber, so it is not easy to be excessively bent. Therefore, the optical fiber protected by the inner tube is usually not easy to bend. According to the laboratory test results, it can be found that the inner tube can indeed protect the optical fiber. It can not only improve the tensile amplitude of the optical fiber, but also ensure that the bending optical fiber is not too large. Of course, due to the addition of an inner tube, the cost will be much higher. Therefore, not every brand of optical fiber will do so. Enterprises need to pay attention to this problem when purchasing optical fiber.3、 Pay attention to the smoothness of both ends during installationThe process of installing optical fiber is much more complex than that of installing ordinary network cable. When installing the optical fiber, both ends of the optical fiber need to be cut. In addition, the smoothness of both ends must be ensured (usually, the smoothness of the end can be ensured by polishing and other means). If the terminal is not smooth, it will lead to signal attenuation. If the network administrator has the conditions, it is better to use a microscope or built-in amplification instrument to detect the smoothness of the optical fiber end to judge its smoothness. In short, it is necessary to ensure that both ends of the optical fiber are properly polished and shaped.After ensuring that both ends are smooth, carefully install the joints at both ends. The installation of this joint is also a technical work. Because if there is an error in the installation of the interface, such as improper splicing, or splicing two optical fibers with inconsistent dimensions together, the intensity of the optical signal will be reduced to a great extent. In general, optical fibers with different sizes are not recommended.After the optical fiber connector is connected, certain protective measures need to be taken. This is mainly because this part is the most likely place to cause signal leakage. If the end is dusty and unclean, it will cause great attenuation when the light reaches the receiver. Make sure that the connectors and fiber ends are clean if necessary. If necessary, it is also necessary to cover the end of the optical fiber with a protective film to prevent damage. Moreover, when connecting the optical fiber to the interface of the router or switch, it needs to be cleaned again. The cleaning method is relatively simple. Generally, you only need to wipe it with alcohol free lens paper. In order to avoid dust pollution, if there is an optical fiber interface on network equipment such as switches and routers, certain protective measures need to be taken when they are not used at ordinary times. If the port is covered, prevent dust from entering. When it is reused, it needs to be cleaned again. The cleaning method is the same as that of cleaning the joint. You only need to wipe it with special paper.4、 After installation, test and calculate the light lossEven if the deployment method is the most appropriate or the optical fiber is the best, it is still difficult to avoid the loss of optical signal in the end, but the degree of loss is different. If the loss degree of the optical signal is within the range that the user can tolerate, then it can. On the contrary, after the maximum limit of this user has been exceeded, it is necessary to analyze the causes and take corresponding measures.In practice, the unit of optical signal loss is measured by decibels (note that this is not a unit of sound). This unit indicates what percentage of the energy emitted by the transmitter is received by the receiver. Generally, you need to test after the first installation and confirm with the user whether you can accept this value. Note that this value needs to be recorded. This value needs to be used for reference in future maintenance. If it is found that the transmission performance of network data decreases in the process of use in the future. At this point, the administrator needs to retest it. If the test value is found to be the same as the original value, it means that there is no problem with the optical fiber, which is caused by the enterprise's own network. For example, it may be caused by the increase of data volume or the change of network architecture. It is necessary to optimize the enterprise's network. On the contrary, if the optical energy loss is found to be greater than the original, the problem that it may be an optical fiber or an optical fiber receiver transmitter must be considered. Check whether the protective layer of the optical fiber is damaged or whether there is a lot of dust on the interface, etc. It can be seen that the test of this optical fiber is very important. During the first test, the data obtained must be recorded in detail as the basis for future optical fiber maintenance and network optimization.
Simple Withstand Voltage Tester, Hipot Tester
Simple Withstand Voltage Tester, Hipot Tester
Simple withstand voltage tester, hipot testerKey words: simple withstand voltage testerThe device can conveniently measure the back pressure of triode, diode, voltage stabilizing tube, thyristor, etc; Capacitor withstand voltage; Resistance greater than 10m Ω. The output voltage is continuously adjustable up to 1400v. The working principle and measuring circuit are shown in Figure 1. The 6V of transformer T is rectified by d5 and filtered by C3 to provide the base voltage of regulating tube Q. Adjust w to control the conduction degree of Q. That is, control the voltage of collector point a to change between 4v-1400v. The 500V voltage output by the high-voltage winding is rectified by the voltage doubling rectifier circuit composed of C1 and D1-D4, and the C2 filter outputs 1400v high voltage. During the test, the tested device is connected between a and B. When the w resistance is reduced, the base potential of Q decreases and the potential of point a increases. Until the milliammeter indicates the rated reverse current of the measured tube (the measured low-power tube is less than 0.1mA, and the high-power tube is less than 1mA). At this time, the voltage value indicated by the voltmeter is the back voltage under the reverse current. When measuring high resistance, connect the resistance between a and B, divide the voltmeter reading by the milliammeter reading, unit: Ω = V / A. Each time it is used up, adjust w to the maximum to return the output voltage to the low point of 4V. Component selection Q requires that when ic = 1a, β ≥ 5, bvcbo ≥ 1500V, reverse leakage current
Cable Tracker Software
Cable Tracker Software
The introduction of cable trackerA cable tracker is a device that provides you with information about the broadcasting channels and their schedule. When you turn it on, it will also activate the corresponding set-top boxes in your home to enable TV watching. The cable model is an old technology that has been replaced by more advanced technologies like DVRs, streaming services and IPTV services.Tips for cable trackerCable companies have a wide range of options when it comes to show selection. Furthermore, they offer content and advertising that is unique both in terms of target audience and also in terms of the content itself. The best part about it is that these companies don't have much choice when it comes to the cable tracker, since they are constantly looking for ways to improve their performance while being aware that cable companies can only do so much for them.How to use cable tracker?There are many ways to track a cable or satellite TV antenna. Some of them are free and some of them cost money. You can choose what works for you and your budget, or you could try different options side by side.The specifications of cable trackerTraditionally, cable tracking is an expensive and time-consuming task. A cable tracker needs to send out a signal to a receiver to detect the presence of a cable as it is plugged into it. What's interesting here is that the signal can be sent even without wires or other physical cables. However, the data generated from this signal gets lost if it's not transmitted over the ethernet network and over wireless technologies like Wi-Fi or Bluetooth.The product instructions of cable trackerThe product instruction is a section in a manual that explains how to use the product. It is sometimes referred to as a user guide, installation manual or installation instructions.The application of cable trackerA cable tracker is a device that is used to identify certain television channels and other programs. It can be used by any one from the audience, viewers or advertisers. The idea behind this tracking technology is simple and it allows an audience to "identify" certain channels of programming they like. This creates a positive association for the user, who can then choose whether or not to subscribe to them in future viewing or advertising campaigns.
Pulse Flashover Method for Fault Detection of High Voltage Cables
Pulse Flashover Method for Fault Detection of High Voltage Cables
Cable has a very important application scenario in our daily life. It can be said that we can't live without cable. In order to ensure the normal use of the cable, it is necessary to regularly detect and maintain the cable. In case of cable failure, the fault point shall be found out in time for maintenance. There are many cable fault maintenance methods. Today, I mainly introduce one of the high-voltage cable fault detection methods, pulse flashover method. For high resistance fault, due to the large resistance at the fault point, the reflection coefficient at this point is very small or almost equal to zero. When measured by low-voltage pulse method, the reflected pulse amplitude at the fault point is very small or there is no reflection, so the instrument can not distinguish it. There are two common high voltage flashover measurement methods, namely DC high voltage flashover measurement method (direct flashover method for short) and impulse high voltage flashover method (impulse flashover method for short). 1、 DC high voltage flashover method (referred to as direct flashover method) when the fault resistance is very high and a stable resistance channel has not been formed, the gradually increased DC voltage can be applied to the tested cable. After reaching a certain voltage value, the fault point is preferably broken down to form flashover. The flashover arc is used to form a short-circuit reflection on the added voltage, and the reflected echo is formed by a high resistance source at the input end to form an open circuit reflection. In this way, the voltage will be reflected many times between the input and the fault point until the energy is exhausted. 2、 Impulse high voltage flashover method (impulse flashover method for short) when the fault resistance is reduced and a stable resistance channel is formed, the DC high voltage cannot be added due to the limitation of equipment capacity. At this time, it is necessary to use impulse voltage test. The DC high voltage charges the cable through the ball gap until breakdown, and still generates short-circuit reflection with the flashover arc formed by it. The measuring inductance L shall be added at the cable input end to read the echo. The radio wave is reflected by short circuit at the fault point and l at the input end, and multiple reflections will be formed during this period. Due to the self induction phenomenon of inductance L, it begins to show open circuit reflection due to the current blocking effect of L, and shows short-circuit reflection after a certain time with the increase of current. The whole circuit consists of capacitor C and inductance L, which constitutes a large process of L-C discharge. Therefore, the wave process at the line input is a nearly attenuated cosine curve superimposed with fast pulse multiple reflection wave. 3、 High voltage cable fault detector is generally used. High voltage cable fault is high resistance fault, and high voltage flashover method is used to measure the distance of fault point. This method uses st-330b cable fault locator as experimental equipment. 1. Wiring mode: firstly, complete the wiring of high-voltage flashover as required; Then, connect the sampler with the ranging host with a double clamp test line, and then place the sampler next to the grounding wire of the high-voltage capacitor. 2. Equipment operation (1) start up, select the sampling method as flashover, the pulse width is the default, the cable type is the physical type, and the reading accuracy is the default. (2) Use the high-voltage equipment to discharge the cable, and then click the orange sampling button on the right to start sampling until the waveform is collected. Press the sampling key again to stop sampling. (3) Study the waveform, move the vernier ruler to the starting point and ending point of a waveform, read the waveform, and the distance of the fault point will be automatically measured in the upper left corner.
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