Guide to Shop Thermal Imaging Scanner in NOYAFA

Guide to Shop Thermal Imaging Scanner in NOYAFA

2021-10-05
NOYAFA
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SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED has full enthusiasm in the field of thermal imaging scanner. We adopt a fully automated production mode, ensuring that every process is automatically controlled by the computer. The fully automated production environment could eliminate errors caused by manpower. We believe that high-performance modern technology can ensure high performance and quality of the product.As we branding our NOYAFA brand, we are committed to being at the forefront of the industry, delivering superior capability in manufacturing products with maximized cost efficiencies. This includes our markets around the world where we continue to expand our international presence, strengthen our international partnerships and broaden our focus to one that is increasingly global.The exceptional experience can also turn a customer into a lifelong and loyal brand advocate. Therefore, at Best Cable Tester Supplier in China _ Noyafa, we always strive to improve our customer service. We have built an efficient distribution network, providing fast, convenient, and safe delivery of products such as thermal imaging scanner for customers. By constantly improving R&D strength, we can provide customers with more professional and effective customization service.
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Best Test Tools for Wire Testers
Best Test Tools for Wire Testers
Automation software tools are now making their way into the testing arena. And rightfully so. There is a lot of value in knowing that you can automate many important steps so that you can spend more time on the actual testing and less time on the manual process. What's more, it allows you to see what actually went wrong during your testing process - instead of just seeing if something happened at all.Wire testers are an important part of any testing workflow. They should be very accurate and precise when they do their job: They must send out a test email once per day, which is usually only 20-30 minutes long, check the email sent by the wire tester and report any issues there to your internal team or external client’s team via email.There are many automated software tools for wire testers. But none of them is suitable for a complete automation of the testing process.The solution to this issue is AI-based software. AI allows you to automate the testing process by writing simple scripts, which will run through all steps in the test process and check if they passed or failed. In turn, this is a significant improvement over manual test automation because you can focus on other aspects such as content creation and research, rather than on test automation itself.The Android wire tester helps the creator to perform quick and precise checks on Android applications.If you want to improve the quality of your development work, there are a number of tools which can help. They can help you by:The best Android wire tester can expose potential vulnerabilities in your application and help you to find them.Automation software and automation testing are controversial fields in the testing community. Until now, automated tests have been manual and they were done by a human tester.Nowadays, there are companies that offer artificial intelligence to automate their existing test procedures.Automated testing is becoming an important part of modern software testing.It's a common practice to test the same code over and over again to find potential bugs. There are many different tools available for automating this kind of tasks, but the most popular one is Automated Wire Tester (AWT) .We can automate the creation of reports from those tests. We create a report for every code change that we make. We can also create reports for typos, spelling mistakes and so on. This kind of automated reporting tool is helpful for our testers as it saves them time and helps them be more efficient in their work.When you read a new Android phone, it's important to know if it is worth buying.Automation software can help with wire testing by automating tasks and saving time. Automation software is intended to replace humans in certain technical roles, such as wire testers.Wire testers are human beings who work on the various parts and aspects of computer systems, and gather information about them. Automation software can be used when the system is not available or because human beings are not available for certain tasks (e.g., during infrastructure upgrades).A good Android app wire tester should not just test your apps, but should also save you time and money.A good Android Wire Tester is important for few reasons. First of all, it can provide key information about the device by analyzing the device's behavior. Secondly, it can provide a quick insight into your desired user experience which will help in improving your marketing strategies or sales goals.Automation can be used to enhance the quality of wire testers.Tracing the evolution of the role of automation software in the Wire Tester industry is a complex and fascinating topic. While some companies have invested heavily in automation software for wire testers, others have not. The reason has to do with two key reasons:#1 They are unwilling to invest too heavily in a new technology and they don't want to alienate their existing customers#2 They don't think that automation is necessary at all. There are simply no applications that need it at all at this point in time. One could argue that infrastructure is still lacking but I personally believe that this argument isn't valid anymore given today's state of the art technologies such as CNC machines and 3D printers, etc. Thus, today's
Things You May Want to Know About Tester
Things You May Want to Know About Tester
An overview of testerRichard Alexander Bevan (14 July 1834 - 18 February 1918) was a British banker and philanthropist. He is known as "the father of Cuckfield."Certifications of testerThe ANZTB offers the following certifications:ISTQB Foundation CTFLISTQB Foundation Performance Tester CTFL-PERISTQB Foundation Model Based Tester CTFL-MBTASTQB Certified Mobile Tester CMTISTQB Foundation Usability Tester CTFL-UTISTQB Advanced Test Manager CTAL-ATMISTQB Advanced Test Analyst CTAL-ATAISTQB Advanced Technical Test Analyst CTAL-TTAISTQB Advanced Test Automation Engineer CTAL-TAEISTQB Advanced Security Tester CTAL-STThe contents of each syllabus are taught as courses delivered by ISTQB Accredited Training Providers. They are globally marketed under the brand name "ISTQB Certified Tester".After the examination, each successful participant receives the "ISTQB/ANZTB Certified Tester" Certificate.What diagnostic tester can I use to check for a shortage or burned wire.?S&G Tool Aid Heavy Duty Circuit Testers w/Retractable Wire - 6"" Features an extra long wire that stretches up to 12 feet for use, then automatically retracts. Rating: No user ratings [rate this item] See All Tools | See More Like This Amazon Find Other Tools...• Like this One• By S&G Tool Aid• From Amazon• In this Price Range (around $15) $14.94Buy at Seller S&G Tool Aid Heavy Duty Circuit Testers w/Retractable Wire - 3-1/2"" Features an extra long wire that stretches up to 12 feet for use, then automatically retracts. Rating: No user ratings [rate this item] See All Tools | See More Like This Amazon Find Other Tools...• Like this One• By S&G Tool Aid• From Amazon• In this Price Range (around $14) $14.44Buy at Seller Lisle Spark Tester Tests Spark Plugs, Spark Plug Wires and Coils Without Puncturing the Wire. With the engine running, place the grooved end of the tool over the plug wire. Rating: No user ratings [rate this item] See All Automotive Amazon $6.31Buy at Seller Continuity Tester/Pocket Flashlight This Combination Continuity Tester Flashlight instantly tests fuses, extension cords, switches, sockets, short curcuits, broken wires, faulty appliances, auto circuits, etc. Rating: No user ratings [rate this item] See All Tools | See More Like This classicgarage Find Other Tools...• Like this One• From classicgarage• In this Price Range (around $6) Related Searches:• continuity tester $6.50Buy at Seller Extra Long Circuit Tester For use on cars, RV, trucks, motorcycles, and snowmobiles Use to check electrical circuits and accessories Wire stretches to 12 ft. for use, then automatically retracts Probe... Rating: No user ratings [rate this item] See All Tools | See More Like This classicgarage Find Other Tools...• Like this One• From classicgarage• In this Price Range (around $12) $11.96Buy at Seller LED Circuit Tester ACTRON LED CIRCUIT TESTER One compact, convenient tool tests spark plus wires and more! Rating: No user ratings See All Parts | See More Like This JC Whitney Find Other Parts...• Like this One• From JC Whitney• In this Price Range (around $15)• With Attention Needed: Short Title• With Type: Electrical Systems $14.99Compare Prices Spark Tester and Indicator LISLE INLINE SPARK TESTER AND SPARK INDICATOR Two easy-to-use, affordable tools designed to check the ignition system and spark plugs, coils and wires. Rating: No user ratings See All Automotive JC Whitney $16.99Compare Prices Grip 20072 Extra Long Heavy Duty Circuit Tester For use on caers, RV, trucks, motorcycles, and snowmobiles Use to check electrical circuits and accessories Wire stretches to 12 ft. for use, then automatically retracts ... Rating: No user ratings [rate this item] See All Tools | See More Like This Tool King Find Other Tools...• Like this One• From Tool King• In this Price Range (around $14) $13.99Buy at Seller Performance W5207 Multi-Use Repair Kit Great for use on automotive, marine, industrial and agricultural applications Contains: Wire crimping tool, 6-12 Volt tester, slotted screwdriver, Phillips screwdriver, blade... Rating: No user ratings [rate this item] See All Tools | See More Like This Tool King Find Other Tools...• Like this One• From Tool King• In this Price Range (around $22)• With Type: Electrical Systems $21.99Buy at Seller Lisle Electrical Circuit Tester The ''Handy Hooker'' Circuit Tester is made with a hooded probe that protects your fingers and automatically centers the wire. Rating: No user ratings [rate this item] See All Automotive Amazon
A Good Guide of Cable Continuity Testers How to Choose
A Good Guide of Cable Continuity Testers How to Choose
You are ready to start shopping now that you know a little more about what is involved in selecting a good voltage tester. Below are details of the best voltage testers on the market from trusted brands that manufacture high quality electrical tools. Trusted manufacturers in the power tool industry specialize in making electrical tools for professionals, and their products are top notch, with many professionals using gauges that they have purchased for decades.To help you find the best network cable tester for your use I have compiled a list of test products that work. I came across the Elegiant Network Cable Tester while working on establishing a LAN connection for a local company. With my extensive experience as an electrician, I can say that this is the best tool for testing cable connections.During the test, make sure you remove the cable from the computer, modem and router. Network cable testers are great for checking cable continuity and ensuring that the signal gets through. Klein Tools VDV501-823 and V DV Scout (r) Pro-2 test kits test voice (RJ11-12) and data (RJ45) via video-to-F connectors and coaxial connections.Platinum Tools TCB360K1 Cable Prowler (tm) Pro Test Kit - Full color cable length gauge with the ability to determine connection status, connectivity and POE detection. I love this type of cable tester because it provides accurate and accurate measurements of the integrity of cable connections. Make sure your cable and network connections are in top shape with this product.Network cable testers are sensitive products that are exposed to various extreme elements, so I suggest getting a tester with a longer warranty. A cable tester checks the electrical connection between signal and cable and confirms things like the wires at the end of the cable. With the HOSA CBT 500 you can test your cable gigging quickly and easily.Selecting, selecting and purchasing a suitable network cable tester can be a complicated and challenging task. In this article, a demanding effort is made to show you how you can test the continuity of circuits and how a good continuity tester will handle your situation. For example, suppose you are looking for a good Ethernet cable tester or an Ethernet cable speedometer.Continuity checks are indispensable for cable installation, cable marking, troubleshooting in the circuit and polarity testing. I have written this conclusion so that people can begin to make up their minds after reading this article. Here's a look at the best recommendations for the best continuity testers on the market.A continuity tester is an electrical test device that determines whether an electrical path has been established between two points where an electrical circuit can be produced [1]. The circuit is tested by activating and connecting the device. A voltage tester or plug analyzer detects the presence of electrical voltage.Voltage testers and socket analyzers indicate to which socket a device is connected. They are used for cables, wires, circuit breakers, lights, sockets and switches. A socket tester is the size of an electrical plug and works with any plug or socket.A fast, acoustic alarm test uses a digital multimeter to determine whether a circuit or line is complete or defective. A Fluke T6 1000 Pro electric tester with multimeter and field sensor not only detects the voltage, but also measures the voltage when disconnected from the outlet. During the sliding test of the fork wire, the tester reports the condition of the wire.The Fuke T6 1000 Pro electric tester also has other common settings that you would expect from a multimeter, including AC / DC resistance and Amperage measurements. One leads to the circuit breaker and fuse box, and the other conducts the current to other devices in the circuit. Using a multimeter, you can see whether the white or black cable is in the inverted socket and whether the earth cable inserted into the box is connected to the socket.When the receiver passes the correct circuit breaker, it emits a noise or light. To determine how hot the cable is, turn off the power, disconnect the socket and place a cap on the cable, usually one of the black ones. An electrician knows that with an electrical tester in his arsenal of tools, you never have to worry about getting a shock.It's the tester you want when you're constantly working with cables and circuits. If you work with coaxial cables, get a special tester, whether you are using a VDV512 or 007. Just like James Bond, they can spy on the cables and help you identify and label the right ones.
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.
Fault Location of Power Cable and Fault Location of High Resistance Cable
Fault Location of Power Cable and Fault Location of High Resistance Cable
Power cable fault and high resistance cable fault are common problems of cable fault, and also belong to medium and high frequency problems of cable fault. Below, the author analyzes and writes the methods of cable fault location of these two cables, hoping to have a certain reference for everyone in case of cable fault. Fault location method of power cable: Aiming at the problem that it is more difficult to determine the fault location of buried power cable than overhead line, this paper selects a representative example of fault location process of 10 kV cable in case of high resistance fault, and introduces the method of locating and locating the fault point by using secondary pulse method according to the fault nature. For the high resistance fault during cable operation, first consult the relevant data of the cable and master the detailed information of the cable; Use multimeter and insulation resistance meter to judge the cable fault type, and determine the corresponding test method according to the fault type; Use the fault tester to test the length of the cable, check whether the test results are consistent with the data, and preliminarily determine the distance of the fault point; Finally, the secondary pulse method is used to accurately locate the fault point, find out the fault point, peel off the cable and find out the cause of the cable fault, so as to take corresponding preventive measures. This method is easy to master, especially for short-distance faults, the test waveform is easier to analyze, and the fault distance can be determined quickly, which makes the cable test more efficient and the fixed-point positioning time shorter. Power cable faults are complex and diverse, which can be divided into open faults and closed faults according to fault surface phenomena; According to the grounding phenomenon, it is divided into grounding fault, phase to phase fault and mixed fault; According to the fault location, it is divided into joint fault and cable body fault; According to the nature of resistance, it is divided into broken line fault, mixed line fault and mixed fault. Among them, mixed line fault is divided into low resistance fault, high resistance fault and flashover fault. 1. Fault detection methods for different cable faults, the common detection methods include low voltage pulse method, pulse current method, secondary pulse method, bridge method, pulse voltage method, etc. [3]. This paper only introduces the three commonly used detection methods. 2. Low voltage pulse method low voltage pulse method is suitable for detecting low resistance fault (short circuit fault with fault resistance less than 200 & omega;) and open circuit fault. It can also be used to measure the length of cable and the propagation speed of electromagnetic wave in cable, and distinguish the middle head, T-joint and terminal head of cable. 3. Pulse current method pulse current method generally includes impulse flash method and direct flash method. The linear current coupler is used to collect the current traveling wave signal in the cable and generate the fault test waveform, so as to judge the fault condition and measure the distance between fault points through the waveform. The direct flash method is used to detect flashover breakdown faults, that is, the resistance at the fault point is very high, and flashover breakdown faults will occur when the voltage is raised to a certain value with high-voltage test equipment. The impulse flashover method is also suitable for testing most flashover faults. Because the waveform of the direct flashover method is relatively simple and it is easy to obtain more accurate results, the direct flashover method should be used as much as possible. 4. Secondary pulse method with the cooperation of high voltage signal generator and secondary pulse signal coupler, the secondary pulse method can be used to measure the fault distance of high resistance and flashover faults. The waveform measured by this method is simpler and easy to identify.
Working Principle of High Voltage Cable Fault Locator
Working Principle of High Voltage Cable Fault Locator
High voltage cable fault locator is a comprehensive cable fault detection instrument, which can test the high resistance flashover fault, high and low resistance grounding, short circuit, cable disconnection, poor contact and other faults of the cable. 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 high voltage cable fault locator consists of three main parts: power cable fault tester host, cable fault locator and cable path tester. The host of the cable fault tester is used to measure the nature and total length of the cable fault and the approximate position between the cable fault point and the 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, a pathfinder shall be used 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 power cable to produce breakdown at the cable fault point. When the cable fault breakdown point discharges, it generates electromagnetic wave and sound at the same time. 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 street lamp cable fault tester, underground pipeline detector, cable identification instrument, 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!
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.
Common Power Cable Test Methods
Common Power Cable Test Methods
If the cable insulation is damaged or aging, short circuit, disconnection, grounding and other faults may occur in use, affecting the safe operation of the power system. Power cable plays an important role in power transmission and distribution system, so it is of great practical significance to detect power cable faults regularly or irregularly. Here is a popular science about common power cable test methods. AC withstand voltage test of main insulation (series resonance test equipment) is an effective method to test the ability of cable insulation to withstand various overvoltage. It is a strict, direct and effective test method to determine the insulation strength of cable. Cable fault location and cable path identification: the cable fault detector system is composed of cable fault detector, high voltage pulse generator, pointing instrument and cable comprehensive detector, which is used to detect cable low resistance, short circuit, open circuit fault, high resistance leakage and high resistance lightning fault, correct direction and depth of underground cable and locate open circuit, short circuit and skin fault points of cable. Partial discharge inspection: different from using ultrasonic detector products to detect common transformer partial discharge, vibration wave partial discharge detection is used for cable partial discharge. This detection method is based on LC damping vibration principle and uses attenuated vibration wave voltage with frequency in the range of 20-800hz instead of working frequency AC voltage detection equipment. It is mainly used to detect the main insulation For the insulation condition of the joint and terminal, its waveform and frequency are close to the sine wave of the working frequency, the action time is short, and will not cause damage to the cable. Infrared temperature measurement: the infrared thermal imager uses the infrared thermometer and optical image mirror to receive the infrared radiation energy distribution pattern of the temperature measurement target, which is reflected on the photosensitive part of the infrared thermometer to obtain the infrared thermal image map. The thermal image map corresponds to the thermal distribution field on the object surface, and the infrared thermal imager is used to detect the infrared radiation signal on the cable surface. The cable identifier manufacturer summarizes the common power cable detection classification. In practical application, power cable detection is closely related to insulator detection. Usually, various insulator fault detectors, insulator distributed voltage detectors and other products need to be used to detect various faults of insulators, especially in the annual spring detection of power companies, such as power cables, switchgear Transformers, overhead lines, insulators and various fittings shall be systematically tested to ensure the safe operation of the power system as a whole.
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