What Is Lan Cable Tester?

The 127th China Import and Export Fair, popularly known as Canton Fair, kicked off online on June 15, a first for the decades-old trade fair, in south China's Guangdong province. This year's online fair, which will last for 10 days, has attracted around 26,000 enterprises in 16 categories with 1.8 million products. The fair will provide round-the-clock services, including online exhibitions, promotion, business docking and negotiations. NOYAFA is a high-tech enterprise specialized in R&D, production and marketing of various professional measuring instruments, including LCD cable tester, Cable length tester, Optic multimeters, CCTV monitor tester, Network cable tester, GPS land meter, Thermal imager and Laser range finder etc.

The power cable fault tester is a special cable testing equipment used to test the open circuit, short circuit, grounding, low resistance, high resistance flashover and high resistance leakage faults of power cables, as well as the open circuit and short circuit faults of coaxial communication cables and local telephone cables. It can also test the cable path, buried depth, radio wave velocity, verify the cable length, and establish cable files for daily maintenance and management. â—† free on-site guidance, training and testing until the user is skilled and satisfied, and there are actual faults, which can be solved on site. â—† battery powered, truly portable; The test distance is greater than 40km. The host test error is less than 0.2m. â—† the host adopts industrial embedded computer system and 12.1-inch large screen LCD touch screen. â—† automatically select the sampling frequency, with a low of 6.25mhz and a high of 100MHz. â—† any double wave comparison function, test waveform can be stored, called, compressed and expanded arbitrarily. â—† the fault distance is automatically displayed, and the double cursor can move * * to 0.18m, which improves the test accuracy. â—† built in various field waveforms and field physical wiring diagrams for reference and learning. â—† cable data management software can establish perfect cable file management information. â—† high precision digital display fixed-point instrument, direct indication of the distance between the test end and the fault point, pioneered in China. â—† it can support wireless network card and carry out technical communication with our company anytime and anywhere. â—† the whole machine is guaranteed for three years, free training, free tracking service and free software upgrade. 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 high voltage cable fault locator, buried cable fault detector, live cable identifier, 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!

Cable is an important part of signal equipment, but in the process of use, it is difficult for ordinary users to find the fault point, and they do not know what the reason is. Therefore, it is particularly important to quickly find the cable fault and judge the fault point. Wd-a10 cable fault tester is a set of comprehensive cable fault detector, which can test cable short circuit, cable disconnection, poor contact and other faults. By summarizing the previous experience, the factors affecting the test accuracy of cable fault tester are analyzed as follows. Since the accuracy of adjusting wave velocity is closely related to the accuracy of test, adjusting wave velocity has become the key to solve the problem. At least two conditions are required to accurately adjust the wave velocity: â‘ the length of the measured cable; â‘¡ There is a good core wire of the tested cable, which is not grounded. Adjust the measurement range without grounding. Connect a good core wire of the tested cable with a known length to the output port of the power cable fault tester and connect it with the red clip wire, the black clip wire and the ground, or another good core wire of the cable. Change the measurement range to match the actual length of the cable. If the actual length of the cable is less than 161.4m, the measurement range shall be adjusted to 161.4m; If the actual length of the cable is greater than 161.4 m and less than 322.8 m, adjust the measurement range to 322.8 m, and so on. The preset wave velocity is 200 220m / μ Set a wave velocity randomly between S and measure it as the wave velocity of the initial test. It is assumed that the wave velocity measured initially is 200 220 M / & mu; S is because the signal cables usually used are in this range. This step is very important. If this step is not set, the initial measured cable length is very different from the actual cable length, and it is difficult to adjust in the next step. After adjusting the wave velocity and measuring the distance of the fault point, compare it with the actual cable length. If the distance between the fault point displayed on the top of the screen is the same as the actual cable length, the original set wave speed, that is, the wave speed displayed on the screen is the actual wave speed of the cable. When testing any point fault of the cable, this wave speed can be used as the benchmark for testing; If the distance of the fault point displayed on the top of the screen is different from the actual cable length, you can simply adjust the wave speed with the cursor still, which can be large or small, so that the fault distance above the screen is the same as the actual length of the cable, then the adjusted wave speed is the actual wave speed of the cable. When testing the cable fault, you can use this wave speed as the benchmark.

Our security camera testers are designed to facilitate the installation, maintenance and testing of security cameras. All our CCTV test monitors are backed by a 1 year warranty from CCTV Camera Pro.CCV safety tester is a kind of multifunction test tool for CCTV security camera installation professionals. A CCTV tester (short for closed circuit television tester) is a tester and monitor that supports the installation and installation of CCTV security systems. It is used to check if the configured CCTV camera is in the right place, at the right angle, with free view and more.A CCTV tester can be used to display video, control the PTZ, generate images and acquire data from the RS485 test LAN cable. It also has a multi-meter feature to provide AC / DC voltage and resistance measurements to provide the installer with additional diagnostic capabilities to locate localized faults.The CCTV tester analyzes the video signal and displays peak, average video signal level, synchronization and pulse levels to determine the optimum level to display the best picture and synchronization to avoid cable loss. A multifunction tester can save you time and money on your next CCTV installation. In order to ensure accurate testing, it is important to study the CCTV system thoroughly and carry out a test with a tool that measures the performance of several indicators.Once the camera is set up in a separate area, the installer must run a video feed from the camera to refine the settings. Not only do you see the camera video and adjust the focus of the variofocal lens, you also have to supply the camera with its lithium-ion battery. This means a ride up and down the ladder to mount the camera, test the cables and adjust the settings.CCV testers, also known as LCD field monitors or CCTV field monitors, provide installers with an ideal solution that allows them to view, calibrate and correct the video feed of the camera in real time based on the additional features they provide. The basic features of a CCTV tester are an LCD screen (2.5 inch x 3.5 inch x 0.5 inch diagonal) that allows the installer to display a camera feed in place. Other features for video calibration include video test patterns, brightness, contrast and saturation adjustment, video test of signal intensity and support for PAL and NTSC video.The built-in 24-inch TFT LCD display enables the display and adjustment of camera settings and functions. The display monitor can also be connected to a DVR display to allow viewing of a CCTV camera with multiple cameras. The closed-circuit TV tester is a handy tool for professional installers of CCTV security systems and do-it-yourselfers to set up and configure a CCTV camera source.The NKTech 35-inch CCTV tester is a portable device designed to install and maintain existing on-site CCTV video surveillance systems. If you are a professional installer, you may have heard of closed circuit TV testing (also known as IP camera testers, CCTV video / LCD field monitors, CCTV camera testers or IP / CCTV camera testers ).The device can be used for TVI cameras as well as cameras in HD, SDI cameras and network IP cameras. IP cameras have the ability to record more than one camera and cover a wider angle, and can record multiple cameras so that the camera system is covered. The CCTV tester is handheld for good reason, it is for installation and convenience.Prisons use video surveillance to prevent drones from delivering drugs and other contraband to prisoners. Video encoders enable migration from an analog CCTV system to a network system, allowing users to take advantage of cheaper hardware with advanced features. There are three possibilities, which are used with high tendency: IP camera systems, digital video cameras or both.Perform real-time camera settings such as focus, zoom, optimization of advanced settings such as BLC, send-up, lighting adjustment, etc. Disaster management uses CCTV cameras for emergency services and responders to assess and monitor events in real time and report the situation to the disaster management team via video. City and community streets monitor cameras and traffic lights in cities to monitor people, collect traffic statistics, evidence and speed.A CCTV tester is a portable handheld service monitor that helps installers configure the camera at the touch of a finger. Market-buying reviewers looking for a video tester or an IP camera monitor kit can get an angle on where the camera is set up and how it should work. A shopper who bought a CCTV camera tester used it to test his camera before he started installing it in his home.The completion of the CAPTCHA proves that you are a human being and gives you temporary access to the web property. It takes 10-25 working days at best, and I cannot keep it in stock according to your order quantity. Your order has been put on hold for 14 days while we await the Woods trial.

The speed of China's economic development is obvious to all. The country's economic development has driven the development of all walks of life, and all kinds of construction work has been strengthened. The construction scale of national power grid is expanding. Although China has also popularized and applied multi-channel high-voltage cable technology, its structure is becoming more and more complex, resulting in multi-channel failure of high-voltage cables. Next, we discuss the problem of fault location of high voltage cable. High voltage power transmission lines have been affected by environmental changes in recent years. The insulation layer of cables is damp due to rainy weather and ponding, the overall overheating in the process of cable use, and the high voltage of cables will not only affect people's power consumption experience, but also cause irreparable loss of economic benefits to relevant power consumption enterprises. How to accurately locate and quickly remedy the fault of multi branch high-voltage transmission line cable has become the focus of power supply departments and power companies. 1、 The construction and analysis of cable simulation model great changes have taken place in the current natural environment, and the natural wear of cable lines is becoming more and more serious in the harsh natural environment. Therefore, the stable and continuous operation of the cable requires the cable protective layer to protect the cable, and the cable protective layer usually plays a key role in protecting the cable. We need to consider the cable, so we should select the power supply equipment matching the cable in the test. However, we should note that when setting the data of the power supply, we need to select the conventional settings of the circuit and resistance, and do not exceed the range borne by the cable. 2、 Simulation and analysis of two-t lines the application of two-t lines is an innovative technology for today's multi branch cable erection, but no country can widely use this technology. We can evaluate the design idea, design scheme, design results and the effect after being put into use in a small scale. We can improve the cable technology in some large cities and areas with complete urban power grid construction. We can transform the original main power supply line into a power supply line of two t lines. If we use this technology, we can increase the investment of the corresponding part in the project and complete it as soon as possible. 3、 Firstly, when the fault location is in Section D, set the fault point in phase a of Section D and carry out the simulation process test. Based on the grounding wire at the beginning of a section, it is concluded that after a problem occurs, the current has a continuous transient process. Then, the metal sheath current that is slowly stable and connected to the fault is large, and the high amplitude reaches 5A. At the same time, the large amplitude of the non fault phase also reaches 1 A. there is no great difference between the current wave detected by this stage and the normal grounding wire. The main route of fault location of high-voltage cable and the route of fault section are cross connected, and the attenuation amplitude of high-frequency voltage will appear after fault. If the insulation layer in the cable breaks down, we can measure the grounding current in different sections and the attenuation amplitude of high-frequency voltage, and analyze the location of cable accident from the measured data.

The vast majority of underground pipelines are metal materials, which can induce and transmit electromagnetic waves. With its superior performance and flexible and convenient detection methods, the underground pipeline detector has a large number of users in the fields of electric power, telecommunications, water supply, heat, gas, petroleum, chemical industry and urban public utilities, which has played a positive role in improving the pipeline management level of relevant industries in China. Problems often noticed during the operation of underground pipeline detector (1). Cleaning, inside and outside of optical fiber welding machine, optical fiber itself, and the important parts are V-groove, optical fiber presser foot and so on. (2) During cutting, ensure that the cutting end face is 89 ° ± 1 °, approximately vertical. During the process of placing the cut optical fiber at the specified position, the end face of the optical fiber shall not touch any place. If it meets, we need to clean and cut again: it is emphasized to clean first and then cut! (3) When placing the optical fiber in its position, do not be too far or too close, 1 / 2 place, proficiency! (4) Do not open the windproof cover during the whole process of welding. (5) The process of heating the heat shrinkable sleeve is called the reinforcement of the connecting part. During heating, the optical fiber fusion part must be placed in the middle and a certain tension must be added to prevent bubbles and insufficient fixation in the heating process. It is emphasized that the heating process and the optical fiber fusion process can be carried out at the same time. When it is taken out after heating, do not touch the heated part. The temperature is very high, Avoid danger. (6) When arranging the underground pipeline detector tools, pay attention to breaking the optical fiber head to prevent danger. The optical fiber is glass fiber, very thin and hard.

With the development of the market, cable fault tester is mainly divided into common and three pulses. What are the advantages and functions of these two kinds? Yuange will explain them to you. [functional advantages of common cable fault tester] 1. It can measure high and low resistance faults of all cables below 35KV, with wide adaptability. 2. It has user-friendly software and full Chinese menu. Key definition is simple and clear. The measurement method is simple and fast. 3. Excellent fault detection success rate, test accuracy and test convenience. As the display terminal, the 4.8-inch color LCD touch screen has strong data processing ability and friendly display interface. 5. Sampling high voltage protection measures are provided. The test instrument will not crash and damage in the impact high-pressure environment. 6. With computer communication interface, it is convenient to save data and graphics in the computer. 7. No test blind area. 8. The built-in power supply can test the open circuit and low resistance short circuit faults of the cable in the environment without power supply. [functional advantages of triple pulse cable fault tester] 1. It can measure high and low resistance faults of all cables of 35kV and below, and has a wide range of adaptability. 2. The "three-stage pulse method" and "three-stage multiple pulse method" are adopted. At the same time, it also has the traditional high-voltage flashover method and low-voltage pulse method. 3. Any high resistance fault presents simple waveform characteristics similar to low voltage pulse short circuit fault, which is very easy to interpret. 4. It has user-friendly software and full Chinese menu. Key definition is simple and clear. The measurement method is simple and fast. 5. The central control unit is used for one key control to trigger three levels of signal output in sequence to ensure safety and success rate. The central control unit can prompt the operation steps and monitor the work process. 6. It has the function of test waveform storage, which can easily store the waveforms tested on site in the instrument according to the specified sequence for call and observation at any time. A large number of field test waveforms can be stored. 7. The measured fault point waveform and good phase full-length open circuit waveform can be displayed on the screen at the same time for the same screen comparison and superposition comparison, and the fault distance can be judged automatically. 8. 11 inch bright color touch LCD display, with strong data processing ability and friendly display interface. 9. Sampling high voltage protection measures are provided. 10. With 232 computer communication interface and USB communication interface, it is convenient to save data and graphics in the computer. 11. The built-in power supply can test the open circuit and low resistance short circuit faults of the cable in the environment without power supply. [functional advantages of cable fault locator] 1. The data display part adopts a highlighted 4.3-inch OLED color LCD to make the display interface clearer. 2. The function and parameter adjustment part adopts a one key programmable pulse coding keyboard, which makes the operation panel more concise and the operation more convenient. 3. The instrument will collect and display the waveform of the audio part in real time. The distance of the fault point can be roughly observed by observing the repetitive waveform characteristics and distance axis, and the operator is not easy to be tired. 4. There are single and continuous modes in the acoustic magnetic fixed-point mode. If the discharge frequency is too fast and the gap time is too short, the user can select the single mode to carefully analyze the relevant data such as the primary discharge waveform, and the waveform page turning is supported in the single mode. 5. In the acoustic signal acquisition, four filter bands are adopted, including low frequency band, intermediate frequency band, high frequency band and full frequency band, which can be selected by the user according to the actual situation on site. 6. The step voltage part adopts waveform display to continuously sample and refresh the signal, so that the user can enhance the continuity analysis of the signal and the resolution of the jump signal. 7. The step voltage part is subdivided into multiple gears, and the large signal is automatically attenuated during the adjustment process to ensure that the display signal is not limited when the maximum voltage amplitude within the test range is input. 8. FIR digital filtering technology is adopted for audio filtering, which makes the characteristic frequency band more obvious and the filtering performance better. 9. Display the distance of the fault point. The distance of the fault point can be displayed within 0-25m. 10. In continuous mode, the compressed waveform within 15m can be displayed. In single mode, the waveform within 15m can be analyzed.

How to detect the fault point of power cable fault tester: it is composed of notebook computer, test system, path signal generator, path signal receiver and positioning instrument. It can complete the two tasks of cable fault test and cable data management. Notebook computer for measurement control, data processing and cable data management. The fault test system can measure the distance between the fault point and the test end at one end of the fault cable, and can also be used to measure the length of the cable and the propagation speed of radio waves in the cable. The path signal generator can generate 15KHz, * large amplitude 30V intermittent sine wave signals for finding cable paths. The path signal receiver is used to receive the path signal, find the cable direction and estimate the buried depth of the cable. The locator is used to locate the fault point. Technical performance of power cable fault tester 1. Fault test system ● it can test various faults of various power cables and open circuit and short circuit faults of communication cables and local telephone cables. ● the speed of radio wave propagation in any cable of known length can be measured. ● test distance: not less than 40km ● system error: less than 0.5m ● sampling frequency: 25MHz ● test blind area: less than 5m ● power supply: AC 220V ± 10% 2. Pathfinder signal generator. ● signal frequency: 15KHz ● oscillation mode: intermittent ● output power: 30W ● power supply: 220V ± 10% 2. Test sensitivity of power cable fault tester: the signal source with 50 Ω internal resistance outputs 300Hz signal, and the input signal of the pointing instrument shall not be greater than 10 when the output is maintained at 2V and the signal-to-noise ratio is better than 20:1 μ V。 ● input impedance: not less than 1.2k Ω. ● use 2 × 2000 Ω headphones. ● working voltage: 9V ± 10%. ● operating ambient temperature: - 10 ℃ 40 ℃

The street lamp cable fault tester consists of rt-2133 cable fault tester host, rt-2132j cable fault locator and rt-2132f cable path tester. The host of rt-2133 cable fault tester is used to measure the nature of cable fault, the total length of the tested cable and the approximate position between the cable fault point and the test end. Rt-2132j cable fault pointing instrument determines the exact location of cable fault point based on the approximate location of cable fault point determined by the host of cable fault tester. For buried cables with unknown trend, cable Pathfinder shall be used to determine the trend of underground cables. If the specific direction of underground cables is known, cable Pathfinder may not be used. The host of rt-2133 cable fault tester can be directly connected with the notebook computer for easy management and operation. The rt-213x complete set of cable fault test instruments can quickly and accurately find the fault points of various cables. It is suitable for factories and mining enterprises, metallurgy, petrochemical systems, power plants, airports, railways, power supply and other departments. Rt-213x cable fault comprehensive tester is widely used to detect low resistance, short circuit, open circuit and various high resistance faults of aluminum core, copper core power cables, high-frequency coaxial cables and local telephone cables with different sections below 35KV. It is a necessary equipment to ensure safe power supply and a powerful assistant for cable production and maintenance workers. 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 high voltage cable fault tester, cable fault tester, underground pipeline detector, 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!

In order to preliminarily determine the high resistance damage in power cable lines, the combination method of high voltage reflection method is usually used: pulse arc method and vibration discharge method. In this paper, we will consider the main ideas embedded in these methods and how they work. In addition, we will discuss the equipment to implement these two methods. 1、 Pulse arc method (ARM) is used to determine high resistance damage. The main idea of pulse arc method is to use a special high-voltage pulse generator. For example, in the arc cable generator of power cable, oil first creates conditions for the generation of high resistance defects and causes short-term arc (breakdown). According to the magnitude of the leakage current and the power of the current source, use one of two ways for the generator to act on the cable line: 1. Smoothly charge KL's own capacity (cable) from the generator current source until breakdown occurs. This method can be used if the leakage is so small that the power supply of the high voltage pulse generator is sufficient to charge before breakdown. For defects with serious leakage, this method is not applicable. 2. Charge the built-in capacitor of the generator to the required voltage (not exceeding the test standard), and then discharge the cable instantaneously. In this case, the high-voltage pulse propagates in the cable, which will lead to failure when it reaches the location of the defect. This method can be used to search for defects on cable lines with serious leakage. In both cases, the use of inductors integrated in the generator will delay the arc combustion time. The current pulse from the breakdown (propagating from the defect to the input of the generator) triggers a synchronous circuit that starts the low-voltage sounding through the cable fault locator (also known as the cable fault tester). The physical characteristics of the arc have low resistance, and the detection pulse of the cable fault locator is also reflected from medium and low impedance defects (short circuit). Advantages of pulsed arc method the pulsed arc method (ARM) for determining high resistance damage has several advantages. This is a non-destructive method, because unlike combustion, the impact of high voltage on the cable is short. Unlike combustion, this method will not reduce the cable parameters as a whole, and will not cause new damage where the insulation resistance is still within the normal range. Arm is actually a high-precision method, because the measurement is actually carried out by pulse method. 2、 The vibration discharge method (ice / attenuation) should deal with high resistance damage. The vibration discharge method is used to find damage on a long cable line, or when the pulse damping of the underground cable fault locator is too large for some reason to apply the pulse arc method. The vibratory discharge method allows you to locate most faults that can be detected using the pulsed arc method, but usually reduces accuracy. It should be noted here that the function of the cable is not displayed when operating by the vibration discharge method. Current oscillation discharge method (current fluctuation method, ice) when the wave current method is used, the oscillation circuit is formed by the system: capacitor on the source side - Cable - low transition resistance (or arc) at the defective part. When the method of vibration discharge through current is used, according to the leakage current value and the power of the current source, here, as with the pulse arc method, one of the two methods of exposing the cable to the generator is used: 1. Smoothly charge the CL capacitor from the generator current source until breakdown occurs. This method can be used if the leakage is so small that the power of the current source is sufficient to charge before breakdown. For defects with serious leakage, this method is not applicable. 2. Charge the built-in capacitor of the generator to the required voltage (not exceeding the test standard), and then discharge the cable instantaneously. In this case, the high-voltage pulse propagates in the and reaches the defective part, resulting in breakdown or large discharge current. This method can be used to search for serious defects. The discharge current pulse returned to the source will charge its capacitor, which in turn. The wave reaching the defect may cause a discharge in it again (in this case, its polarity will change), or if a second discharge does not occur, it will reflect with the same polarity and repeat the process again until all the energy of the initial pulse disappears. These vibrations are displayed on the screen of the cable fault locator connected to the cable through the inductive sensor.