What Is Air Flow Tester?

What Is Air Flow Tester?

2021-11-05
NOYAFA
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air flow tester made by SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED promises strong durability and strong practicality for the market after our years of commitment to innovation and development of the product. It is the fruit of our research and development and has been widely accepted for its advanced technology and exquisite techniques applied to it. We have been strengthening our local R&D capability to design and localize our products in the overseas market to cater to the local people's needs and has succeeded in promoting them. Through those marketing activities, the brand influence of our brand -NOYAFA is highly increased and we glory in allying with more and more overseas enterprises.Almost all products at Best Cable Tester Supplier in China _ Noyafa, including air flow tester can be customized to customer's design preference. Backed by our strong technical strength, customers are able to get a professional and satisfying customization service.
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How to Select Cable Fault Test Equipment
How to Select Cable Fault Test Equipment
Recently, many friends have consulted about the selection of cable fault detection equipment. Whether the matching of cable fault detection equipment is correct will directly affect the use effect of the equipment. It is only necessary to select the corresponding supporting equipment according to the cable condition of the unit to ensure the reliability and convenience of the test work. Now let the cable recognizer manufacturer introduce how to select the type. Generally, cable testing equipment can be selected according to the following principles: first, selecting perfect service is the primary factor; In recent years, due to the increasing popularity of cable test equipment faults among domestic users, domestic manufacturers and dealers are also increasing. Choosing reliable manufacturers and whether they can provide high-quality services should be the only correct choice for users to choose cable test equipment at present. 2、 Products with advanced performance are the best choice; Since it came out in the 1970s, the cable fault tester has undergone years of continuous improvement, especially the application of computer technology and high-speed sampling technology in the 1990s, which has revolutionized the performance of the instrument. By transforming analog test technology into digital test, the test waveform can be permanently saved or printed. Wave storage problem: due to the rapid development of microcomputer technology in recent years. Due to the adoption of new electronic components and new technologies, cable fault detection technology has developed greatly. The previous single waveform detection has been gradually replaced by a series of waveform processing technologies such as multi waveform display, waveform superposition and waveform comparison. Modern new cable fault tester generally has waveform storage function. Due to different models, the number of stored waveforms is also different. Generally, there should be at least two groups of waveform storage in use for comparison when analyzing waveforms. The advanced test instruments currently designed have on-site protection function. No matter when you start, you can reproduce the last test waveform. In this way, it plays an important role in summarizing and summarizing data in the office after the on-site test. In the design of old-fashioned instruments, the memory will be cleared after startup for test preparation. The test waveform will be lost and no data will be retained in the instrument. Automatic identification of waveform: the cable fault tester mainly collects and displays the waveform of cable fault discharge in the test process, and generally needs to analyze and judge the collected waveform manually. Therefore, the analysis level of the operator is required to be high, and the inexperienced operator is often unable to correctly judge the fault waveform, resulting in the query cable fault can not be handled correctly. And the existing new cable instrument has the function of automatic identification.
When Purchasing a Cable Fault Tester, Pay Attention to These Points to Avoid Entering the Pit
When Purchasing a Cable Fault Tester, Pay Attention to These Points to Avoid Entering the Pit
. the cable fault tester is an important tool for the power part to maintain the normal operation of the cable. It helps the power staff quickly reach the fault point and eliminate the fault in time, so as to ensure the normal operation and smoothness of the cable. Many people have introduced cable fault flashover and Gaozu fault, so pay attention to these points when buying to easily help you avoid stepping on the pit 1. You can't just look at the price, because what you need is an efficient and accurate testing equipment with perfect supporting after-sales service and pre-sales technical service guidance. These should be communicated and determined before purchase. It is worth paying attention to the details such as the list of accessories when the equipment leaves the factory, the use and installation after receiving, whether relevant technicians come to the site for guidance, or whether the use video is provided. The selection of cable fault detection equipment manufacturers is guaranteed. 2. Define your needs. This is to clarify the key parameters of the type and model of fault detection equipment you buy according to the scope of your use. The application scope of power cable fault test is relatively wide. It is compared with the communication cable fault tester, which is used to detect the fault point of communication cable. Many buyers, or purchasing departments, especially some power departments, are separated from the user department and the purchasing department. It is found that many remain unchanged in use, or even have no after-sales service at all. In fact, the basic principles of cable fault tester are almost the same, but the real competition is the service and product quality itself. I hope you can choose a cost-effective power fault detection equipment from the details when purchasing.
Best Cable Tracker
Best Cable Tracker
The introduction of cable trackerCable TV is the future, and we are living in a world where people will be able to watch their favorite programs anywhere, anytime.Tips for cable trackerIn TV industry, one of the most important tasks is to find out who and what are the people watching your shows. It is really hard to do this job.How to use cable tracker?Cable trackers are part of a live communications system. While they can be used in a variety of different situations, there is one thing that they all have in common: they can help organizations to detect disconnected or out-of-sync communication links between people and devices.The specifications of cable trackerWith cable tracker, you can track the number of subscribers on a cable TV network. This way, you can know how much money your client is making from their cable channels.The product instructions of cable trackerUSA has some of the best-known cable TV providers. There are 18 channels in total, including one free channel. Most programs are broadcasted on satellite or cable. The main purpose of these channels is to get traffic to the advertisers' websites and for this purpose, they have to be reliable and functional. Most companies use a technical device known as a television tuner to receive the channels and they need their instructions in order to be able to control it, tune it or change its settings correctly. It is therefore necessary that if you want your company's website to get noticed by potential clients, you need reliable product instructions which are accurate enough so that people can understand them immediately and avoid any confusion regarding their products' functions.Most of the products have numerous settings and options, so there is no wayThe application of cable trackerA cable tracker is a device that allows us to identify and monitor our cable channels.
How to Ensure the Correctness of Cable Identification by Live Cable Identification Instrument
How to Ensure the Correctness of Cable Identification by Live Cable Identification Instrument
In the 21st century, with the rapid development of railway, the speed per hour is faster and faster, and the marshalling operation is more and more intensive, it is necessary to ensure the normal operation of electrical service system. How to ensure the correctness of cable identification by live cable identification instrument, we will discuss and explain this problem below. In the electrical service support, the fault and construction of signal cable shall be tested and identified quickly. If the identification is wrong, it will have a very serious impact and cause train accidents. So let's talk about the identification of electrical service system. 1、 Current situation and disadvantages of signal cable identification in telecommunication system target cable identification is required in field work such as emergency repair, relocation and replacement of signal cable. Since there is no suitable instrument, most of our signal cable maintainers use the following methods to identify. First, wait for the skylight point, and remove the signal cable sheath when the skylight point; Secondly, two core wires are selected as the identification wire, and the two core wires are also found at the end; Finally, use the blade to cut the skin of the selected two core wires for short connection, and use the external meter to measure whether the selected two core wires are short circuited at the end. If they are short circuited, it means that the identification is accurate, otherwise, the identification is wrong. However, there are many disadvantages in using this method for identification: 1. Generally, such work is rush repair, which must be completed in the skylight point. If it takes up the time in the skylight point for identification, the rush repair time will be greatly reduced, and some even need to apply for two skylight points to complete a work; 2. After the selected two core wires are short circuited, the two core wires found at the end may not correspond, resulting in wrong results; 3. The outer skin and copper shield of the cable shall be broken. After identification, this place shall be restored. In the future, this place is a joint and a potential fault point. 4. The most important thing is that this identification often produces wrong results, resulting in operation accidents. 2、 Current status of cable recognizer 1. Current status of identification equipment (identification and attached identification): status of identification 1: conventional cable recognizer is designed for power cable identification and is widely used in the power field. Whether imported or domestic, it has two service conditions: 1) it has high requirements for the loop resistance of the target cable, Generally, it shall not exceed 50 ohms. If it exceeds the range of this circuit resistance, the equipment will not work normally, which is beyond the range of equipment use; 2) Disconnect at least one end of the outer armor grounding (same as shielding grounding) at both ends of the target cable, so that the applied signal cannot return from the target cable. Therefore, this power cable identification instrument is not suitable for the identification of electrical signal cables. Identification status II. When promoting digital path tester, some manufacturers publicize that the equipment has identification function. In fact, when using the digital path tester to identify, if the receiver touches the identified cable, which signal is the strongest, that is the identified cable. This recognition method has a single judgment basis in recognition, only the signal size, no signal direction, and can not be used as the final judgment. Moreover, such equipment has great attenuation on the signal cable, and the identification of long-distance signal cable can not be done at all. 2. Conclusion: the use conditions of power cable identification instrument and digital path tester determine that these two types of equipment are not applicable to the signal cable of electrical service system. 1) For the signal cable of electric service. The cable is very long, with a length of more than 5km, and some can reach more than 20km; The wire core is very thin, generally 1mm ² , The resistance is 23.5 Ω per kilometer, and the cable body resistance of more than two kilometers has reached the critical value of equipment test, so the loop resistance problem has become a hard wound of the conventional identification instrument. 2) In the electrical service system, it is very inconvenient to open the outer armor grounding (the same as shielding grounding) of the signal cable. The regulations of each Railway Bureau and railway line are inconsistent. Some cannot be opened, some must be opened in the skylight point, and must be restored before the end of the skylight point. Based on the above two points, the conventional cable identifier and Pathfinder can not meet the requirements of signal cable identification of railway electrical service system. 3、 During the test of railway signaling cable identifier, the requirements for loop resistance can reach 1000 Ω, and there is no requirement for armored grounding or ungrounded of the target cable. The utility model solves the difficult problem of identifying the signaling cable. The railway communication cable is specially designed and can be used online. It has the characteristics of micro power transmitting signal, has no crosstalk and interference to the data transmission of adjacent cables, and accurately finds out the required cable. The size double jaw configuration can not only identify the cable, but also identify the wire pair in the cable. Color large screen LCD, live voice prompt, friendly intelligent man-machine interface, and its unique intelligent orientation can indicate the signal direction, which makes the operation simple and practical. It is especially suitable for field use. Even untrained personnel can use it quickly. Through live measurement, it is not necessary to apply for night skylight time to cut off and repair cables. Workers in the front-line electrical service workshop can measure during the day, including when high-speed rail / Bullet train passes, which improves the timeliness and operability of detection.
What Companies Are Developing Fiber Optic Testing Procedure Independently in China?
What Companies Are Developing Fiber Optic Testing Procedure Independently in China?
Mainly there are 3 types of production standards - industry, national and international standards. Some fiber optic testing procedure manufacturers may even establish their unique production management systems to guarantee the product quality. The industry standards are made by industry associations, national standards by administrations and international standards by certain authorities. It is a common sense that international standards such as CE certification, are necessities if the manufacturer intends to do export business.SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED is a strong fiber optic testing procedure company. To save the energy, NOYAFA puts the eco-friendly materials into use during the production. SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED has strong manufacturing strength to meet the global market demand of fiber optic testing procedure.Our mission is to provide a friendly professional service which exceeds our customer’s expectations, and to build long lasting and satisfying working relationships. Welcome to visit our factory!· Related Questions:1. What standards are followed during fiber optic testing procedure production?Mainly there are 3 kinds of production standards - national and international standards, industry. Some fiber optic testing procedure manufacturers can even establish their particular production management systems to ensure that the product quality. The industry standards are created by industry associations, nationwide standards by administrations and international standards by certain authorities. It is a frequent sense that international standards such as CE certification, are essentials if the manufacturer intends to perform export business.
The 5 Best Reasons Why You Should Use a Laser Light Power Meter
The 5 Best Reasons Why You Should Use a Laser Light Power Meter
The PM100A power meters console is the analog counterpart to the digital power and energy meters PM100D. It is ideal for use as a pulse laser power meter CW, incoherent optical source power meter (general light power meter), fiber power meter and more. You can also consider one of the laser power meters such as our Pronto series, which gives you power readings of up to 10 kW every 5 seconds with 3% uncertainty.With this information in hand, you might think that you could opt for a laser power meter. The biggest problem is selecting the appropriate sensor for measuring laser light, as most other types of broadband light measure. We recommend that you select your electricity meter so that you can determine which detector meets your needs, not the other way round.This depends on the output current source and the sensitivity of the meter. You need to know how much power and energy density you have to select a sensor that is not damaged. Finding the best sensor for a particular application is not trivial, so we recommend using our Sensor Finder on our website to calculate the best sensors for the measurement conditions you have entered.For example, one of our leading sources has a maximum power of 625 x 125 fibers at 15 dBm. If your instrument uses a power level that is 10 dB higher, it is below the minimum requirement. We propose an optomechanical power meter that counts the number of photons by measuring the displacement of mirrors that push the laser beam and modulate it.After our demonstrations, calculations and analyses, we have come to the conclusion that it is possible for our novel type of power meter to measure laser power with an uncertainty of one percent (1s). This work demonstrates a novel method for measuring laser power with optomechanical systems. The prototype was tested by hanging a 25 mg mirror with an optomechanically coupled oscillator and measured the displacement of the mirror pushed by a modulated laser beam with a Michelson interferometer.The number of photons falling on the continuous wave of the laser can be measured by measuring the mirror shift caused by reflection amplitude modulated by the laser beam. In this area of equilibrium between optical power measurement and small mass measurement, metrological exchange of SI masses is enabled to calibrate optical power and SI of the optical power to calibrate the small mass measurements. Laser power measurements with an uncertainty of less than one percent (1%) are possible.In order to select one, one must know the beam point size and energy distribution; for example, a Gaussian beam has a high density, but is also flatter than other modal beams. Weaponable lasers tend to have large openings or openings that cause the laser beam to propagate, which improves its ability to maintain its intensity over long distances. With a large aperture, a rocket-killer laser beam can be aimed at the moon, and infrared spots of it can be detected from up to 15 miles away on the surface.A typical red laser pointer is about 5 milliwatts, but a good one has such a narrow beam that it hits the moon that it spreads a large part of the surface when it gets there. Observed from an airplane that is 40,000 feet in the air (assuming there are no clouds or smog), the red laser points would be brighter than a quarter of the moon. From the International Space Station it would fade to the brightest star in the night sky, Sirius.A laser pointer (or pen) is a small handheld device that emits a narrow, coherent, powerful, visible light laser beam that is used to highlight something of interest by illuminating it with a small bright spot of colored light (usually a battery or a laser diode). The small width of the laser beam and the low power of a typical laser pointer make it invisible in a clean atmosphere and only show the point where the light hits an opaque surface. In Starman, a dummy launched into space by a Tesla car from Elon Musk's company Tesla Space, the red laser pointer dimmed without anyone noticing.Green laser pointers [5] are more complex than conventional red laser pointers because laser diodes are not available in all wavelength ranges. A powerful green laser visible by scattering radiation from air molecules is visible at night and this type of pointer is used by astronomers to point out stars and constellations. Laser pointers can be purchased online, and powerful high-performance pointers are also commercially available.A second concern arose in 2010, when four researchers from the National Institute of Standards and Technology (NIST) found that commercially manufactured green laser pointers emit harmful infrared radiation. Laser pointers generate a colliding infrared beam, which is converted into green light by a special crystal. Laser intensity and distance are higher than that of an energy-rich ordinary light source, which propagates its emissions at a wide angle.We present a small power meter to measure the radiation pressure of a high-power laser. A beam of light of 5 arcminutes width from the surface of the moon has a beam of lux (compared to 130,000 lux from the sun). In comparison, the Moon illuminates the Earth's surface with lux illumination, which means that our laser is too weak to be seen from Earth, but when you are on the Moon, the laser light is weaker than the moonlight above us on Earth.The incident laser power is determined by interferometric measurements with displacement of a mirror with a high reflectivity of 20 mm diameter mounted in the middle of a two-element spiral bend. Because the small power meter that detects radiation pressure of the incident high-powered laser interacts with the laser small, packaged and non-destructive, it is well suited to perform robust real-time power measurements with high precision in laser-based manufacturing environments.
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
Cable Fault Tester Has Become a Common Equipment for Cable Fault Detection
Cable Fault Tester Has Become a Common Equipment for Cable Fault Detection
As we all know, the rapid development of society is inseparable from the construction of infrastructure, in which the laying of power plays an important role, and the development of the whole society is inseparable from the stable operation of power. If the power failure is not solved quickly, it will have a negative impact on the regional economy, production and life. Therefore, the equipment that can quickly judge the cable fault point is extremely important. Cable fault tester is such a device. The working principle of cable fault tester is to first measure the reflected waveform of low-voltage pulse, and then use high-voltage pulse to impact the fault point passing through the cable to produce arc. When the arc voltage drops to a certain value, the medium voltage pulse is triggered to stably prolong the arc time, and then the low voltage pulse is sent out to obtain the reflected waveform of the fault point. After the two waveforms are superimposed, it can also be found that the divergence point is the corresponding position of the fault point. Because the medium voltage pulse is used to stably prolong the arc time, it is easier to obtain the fault point waveform than the secondary pulse. Compared with the second pulse method, the third pulse method does not need to select the synchronous arc burning time, and the operation is simpler. The triple pulse method adopts the double impact method to prolong the arc time, stabilize the arc, and can easily locate high resistance fault and flicker fault. The triple pulse method has advanced technology, simple operation, clear waveform and rapid and accurate positioning. It has become the mainstream positioning method of high resistance fault and flicker fault. The third pulse method is an upgrade of the second pulse method. Full length and approximate position between cable fault point and test end. The cable fault locator determines the exact location of the cable fault point based on the approximate location of the cable fault point determined by the host of the cable fault tester. For buried cables with unknown direction, the working principle of power cable fault tester: the power cable fault tester is composed of three main components: power cable fault tester host, cable fault locator and cable path tester. The host of cable fault tester is used to measure the nature of cable fault. A Pathfinder is required to determine the underground direction of the cable. The basic method of power cable fault test is to apply high-voltage pulse to the fault cable, the cable fault point is broken down, the cable fault is broken down, the electromagnetic wave occurs when discharging, and sound is emitted at the same time. Let the high resistance fault of the cable click through the arc. At the same time, the low-voltage pulse for measurement is added to the test end. When the measurement pulse reaches the high resistance fault point of the cable, it encounters an arc and the arc surface is reflected. Due to arc combustion, the high resistance fault becomes an instantaneous short-circuit fault, and the low-voltage measurement pulse will have obvious changes in impedance characteristics, so that the waveform of lightning measurement becomes a low-voltage pulse short-circuit waveform, making the waveform particularly simple and clear. This is the so-called secondary pulse method to receive low-voltage pulse fault, which is equivalent to instantaneous short-circuit fault. The low-voltage pulse fault is combined with the traditional high-voltage pulse fault discharge method to discharge the low-voltage pulse fault to a positioning method (the secondary pulse fault is discharged into the high-voltage short-circuit fault in a positioning method, the low-voltage short-circuit fault is discharged, the high-voltage pulse fault is discharged, the low-circuit fault is discharged, the low-circuit fault is discharged, the low-circuit fault is discharged, the low-circuit fault is discharged, the low-circuit fault is discharged, the low-circuit fault is discharged, and the low-circuit fault is discharged.
AI Wire Tester, Data Statistics Correction Software
AI Wire Tester, Data Statistics Correction Software
How can an individual be a successful professionally?As a writer, you should be able to quickly get the necessary information of your content. This can be done using wire testers which are basically software applications that help you get the information you need. You can use them to search and find out the content ideas by using keywords or titles.Wire tester software is a tool used to test any kind of network connection. They are the ones who can test it for security and some other purposes. In IT industry, they also test the performance of servers and client computers.A custom IT project is the perfect way to test-drive a software solution. It's a chance to see if it works on different types of devices and environments. And it's cheap: thanks to automated testing, you can test any kind of software and hardware solution in a matter of minutes.With the help of automated wire testers, IT is able to create software or systems with more flexibility.The goal is to create software that improves productivity and facilitates work flow. These project management tools provide clients with a system for sorting out the tasks they need to perform throughout their workflow, and then tracking exactly how much time they spend on each task or each action, thus making them accountable for their timing and results.Using an automated wire tester, both the author and the client can create custom IT projects with ease. The wire tester is a piece of software developed by a professional computer engineer. It takes as input bytes from an application or text file, populates the variables that are available in it and produces results that are more understandable to the end user.These automated wire testers are used by most of the IT companies for testing their applications and infrastructure in order to ensure maximum uptime of their servers over time.Wire tester is a software that can test the communication between your computer and a web server. The software is used by people who need to keep an eye on their website visitors, or for website developers who need to monitor the traffic of specific pages.Wire Testers are used when an organization needs to test their product. Sometimes these testers are not fully comfortable with their skillsets, or they feel that there is no other way to test their product than by spending money on a professional tester.A wire tester is a person who tests frequently in order to see if the product works as expected and meets the customers’ needs. They usually work with computers and networks which can be either local or remote. They can be paid professionals, self-employed individuals, students or freelancers.Wire testers should have technical skills related to computer programming languages like C# and .NET Framework (Windows/MS). In addition, they must have experience of using automation software like Java and .Automated Wire Tester (AWT) is a program that provides users with the ability to capture and test their IT systems. With it, they can troubleshoot and fix any potential issues on their network.Automated Wire Tester has a long history of providing automated solutions for the IT industry. In this article, I will discuss about why it is good for business.Automated Wire Tester (AWT) consist of several useful features that will help any IT project manager make decisions, including:Automated Wire Tester (AWT) is a tool that allows us to create custom IT projects. It does it by providing an end-to-end management across all the project phases. By integrating the manual and automated processes, it ensures that we are leaving no stone unturned while taking our projects to completion.The following is a list of things to be included in machine learning models:"Wire Tester" is a popular software used to test the functionality of various products. Like other software, it has its benefits and disadvantages.We should not think of these wire testers as a replacement for human testers. They can help with the testing process but they are not actually the product developers or designers themselves. They just provide assistance to the product developers by providing feedback on their designs and coding practices.For years, the primary goal of copywriting was to write a great ad and get the best possible result.However, today there are so many different tools on the market that it is not uncommon to find several different bullet points in various kinds of ads. This presents a huge challenge for copywriters. Especially as marketing budgets have been shrinking rapidly over time and the need for advertising has never been greater.
How to Use the Wire and Cable Fault Tester to Quickly Find the Fault Point
How to Use the Wire and Cable Fault Tester to Quickly Find the Fault Point
In case of cable fault, power workers usually need to use cable fault tester to determine the location of fault point, so as to facilitate power workers to maintain cables. What problems should be paid attention to when using wire and cable fault tester to test fault points? Xiaobian summarized the following points on this issue. I hope you can solve your doubts and answer questions. Interested friends can have a look. 1. The gap between the discharge balls should not be increased. After using the cable fault comprehensive tester to roughly test the position of the fault point, if the gap between the discharge balls is adjusted too large, the impulse voltage will become higher, the high-voltage impulse time is too long, the fault point will be short circuited, the fault point will not discharge, and the fault point is difficult to find. Therefore, it should be noted that the gap between the discharge balls should not be adjusted too large. 2. In special cases, two fault testers can be used. If the soil layer is too thick, the surrounding environment has great interference, or the cable itself is damaged, resulting in weak vibration signal transmitted to the ground when the fault point is discharged, which makes it difficult to locate the fault point, two wire and cable fault testers can be used by taking advantage of the simultaneous occurrence of vibration wave and electromagnetic wave generated during fault click discharge. Use the probe and the probe to work at the fixed point at the same time. When two instruments hear a bang at the same time, and then find the sound point, we can accurately find the location of the fault point. 3. How to find the loudest point at the fixed point: after hearing the regular discharge sound, move the tester back and forth along the direction of the cable to find the position with large discharge sound. At this time, pay attention to reducing the output volume of the tester, and then slowly find the place with a loud sound. 4. Pay attention to replacing the battery. When the instrument is not in use, the power supply needs to be turned off in time. If the battery is low, the sensitivity of the instrument during test may be reduced, resulting in increased noise. Consider changing the battery at this time. 5. Check the wiring. If the shielding layer of the input line of the instrument is in poor contact, resulting in the sound of the radio station from the headset, you can check whether the wiring is correct. Precautions for cable laying: I. when using drainage pipes, the following provisions shall be observed: 1. The number of pipe holes shall be properly reserved according to the development needs. 2. For cables with large difference in conductor working temperature, different pipe banks should be set at appropriate spacing. C. the covering thickness of pipe top soil shall not be less than 0.5m. 3. The pipeline shall be placed on the leveled and compacted soil layer, and sufficient cushion blocks shall be provided to keep it continuous and straight; The longitudinal drainage gradient shall not be less than 0.2%. II. Requirements for cable wells. 1. Cable wells shall be set in the following parts of long cable ducts: (1) the limited distance of traction force between cables. (2) Cable branches and joints. (3) The direction of the pipeline changes greatly, or the cable goes directly underground through the drainage pipe. (4) The slope of the pipeline is large, and the fixation must be strengthened to prevent the cable from sliding. 2. Cable trench in power distribution room cable trench in power distribution room is generally used for incoming and outgoing lines of power distribution equipment, which is basically divided into under cabinet trench and double line trench. The cable trench wall is mu10 autoclaved lime brick, M5 cement sand, 1:2 cement mortar plastering of the trench wall, C20 concrete for coping and foundation, and channel steel shall be embedded under the equipment.
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During 15 years development, Noyafa has become the most famous brand in cable testing industry in China. With excellent production capability, reliable quality, good after-sales service, we get good reputation from customers all over the world.
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