Guide to Buy Multi Function Wire Tracker in NOYAFA

Guide to Buy Multi Function Wire Tracker in NOYAFA

2021-10-22
NOYAFA
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How to Choose the Right Bnc Coax Cable Tester
How to Choose the Right Bnc Coax Cable Tester
This type of cable supplies power to the device in question and transmits the video signal to the output. The prefabricated Siamese cable is available in various lengths to keep most camera cables at a distance. The optical cable tester includes a plug for visible light sources that is compatible with the optical cable installation.A cable tester is a microcontroller that displays and automates the test process and displays the test results for multi-wire cables. It connects to the end of the cable separately with a display of the current source portion to allow the injection of test current from one end of a cable to detect the results from a remote end.To check a USB cable, you can perform simple USB tests by connecting the cable end to the appropriate port on the cable tester. You can also check your cloud services, data communications and data transmission by testing connection stability with network cable testers.There are a number of methods to test coaxial cables to obtain a reliable signal frequency. Following are the steps to test a coaxial cable with the help of a multimeter probe. This is a reliable method to test the coaxial cable without signal loss.A network cable tester is a revolutionary device designed to test the reliability and capability of cable connections. It is a necessity for network technicians, network testers, cable testers and other related work in this field. Cable network testers are not only reliable, but also able to fix problems and help you identify cable problems and connection problems.The coaxial cable RG-179 uses a 7.5 Ohm BNC connector and can be used in high temperatures. RG-6 coaxial cable is the "coaxial cable for the Internet" - it is used to transmit the signal over the Internet connection (the Internet signal runs at a higher frequency than traditional analog video). It can be operated up to a distance of RG-59 without loss of the video signal, but it is a thick and rigid cable that is not comfortable to work with.The RG-174 coaxial cable uses the 50 ohm BNC connector and is thin enough for wide applications such as GPS navigation antennas for cars and many vehicles. RG58 coaxial cables use the 50 ohm BNC connectors and are versatile due to their performance. The RG-59 coaxial cable is used to transmit video signals from a CCTV camera to a monitor in another room.Although 75 Ohm coax is likely the impedance found in most of today's applications, it is important to note that all components of a coaxial cabling system must have the same impedance to avoid internal reflections at connecting points that can cause signal loss and poor video quality. High-capacity cables can distort the transmission of digital signals by reducing the distinction between graduated peaks and sinks. 75 ohm coaxial cables are therefore of great benefit for digital transmission, and their lower capacity than 50 ohm cables ensures that all digital transmission passes through the wire with minimal losses or distortions.Digital Signal 3 signals (DS3 signals), which are used to transmit data traffic to the control panels, are called T3 lines and use coaxial cables comprising 7.5 ohms (type 735) and type 734. Type 735 cables are used for distances of up to 6.9 metres, while type 734 cables can be used for distances of up to 13.7 metres.There are various types of adapters for BNC connectors, including T connectors, cylinder connectors and terminators. They can be plugged into any type of connector or SDI signal transport connector.Choosing the right cable is a major problem that plagues most companies and teams. Choosing the right BNC connector for the cable for your project comes at a price. To avoid problems with your network, use BNC connectors instead of compressing or bolting cables.This guide to cabling security cameras provides a practical explanation of the cable types of surveillance cameras and termination cables for easy installation. Siamese cables for surveillance cameras are a two-wire solution with a cable assembly that enables easy video and power transmission to the BNC camera. Curveball Cat5E and Cat6 cables are used to send the video signal to the camera using a video balun adapter.When using a video balun network, the cable does not tip over and requires the lead wire to be exposed by removing the outer layer of the wire at each end.Connect one end of the coaxial cable tester to the socket and bring the other end to a point where several coaxial signal cables meet. The video signal and power supply are transmitted via a single network cable, similar to how Siamese cables work. Another method for network cables is to crimp the RJ45 connector and plug it into the socket of a video power baloon.When you touch the multimeter probe on the end of the right coaxial cable, the meter reads 0 but you will see different readings on the other cables.If your coaxial cable is on the wall, connect an end of the coaxial cable tester to the wall plate and point the other end to the tester to facilitate assembly of the entire cable. To find the right cable, touch the cable one way or the other and a beep will be generated. If it is the antenna on your roof, you can use a multimeter with an aluminum coil to track the right end of a particular coaxial cable.Once you traced and identified the coaxial signal of the cable that you want to test with a multimeter, the next step is to figure out how to perform the task. Touch the center of the conductor end of your coaxial cable with the multimeter probe.Confirm that the shielding patency at both ends of your coaxial cable is in good condition. A second test should be performed on the coaxial cable to determine the status of the screen continuity.
Location Method of High Resistance Damage in Power Cable Line
Location Method of High Resistance Damage in Power Cable Line
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.
What Are the Common Faults and Discrimination Methods of Cable Fault Tester
What Are the Common Faults and Discrimination Methods of Cable Fault Tester
1、 Cable fault type power cable fault is mainly due to mechanical damage, insulation aging, low construction quality, overvoltage, etc. The commonly used cables are cross-linked ethylene, non dripping oil type, oil immersed paper type, polyvinyl chloride and unknown type. According to the nature of cable fault, they can be divided into low resistance grounding or short circuit fault, high resistance grounding or short circuit fault, disconnection fault, disconnection and grounding fault and flashover fault. 2、 Firstly, we need a megger to measure the insulation resistance of each phase, and judge the fault type according to different insulation resistance values. 1. When we measure that the insulation resistance of the cable to the ground is lower than 100k Ω, it is a low resistance grounding fault. 2. When we measure that the insulation resistance of the cable to the ground deviates from the normal value or is higher than 100k Ω, it is a high-voltage cable fault. 3. When the ground resistance of the measuring cable is high or normal, conduct multiple tests on the conductor to check whether there is a wire break. If there is a wire break fault. 4. When the conductor of each core or multiple cores of the measuring cable is discontinuous, and then after multiple core to ground measurement, judge which type of the above three faults. 5. Flashover fault basically occurs in preventive voltage withstand test, cable terminal and middle joint. Sometimes flashover occurs many times, but the interval is a few seconds or minutes. 3、 Cable fault tester to find out cable fault methods: 1. With high-voltage equipment, it has the traditional impact high-voltage flashover method and low-voltage pulse method. 2. 2. Any high resistance fault presents simple waveform characteristics similar to low voltage pulse short circuit fault, which is very easy to interpret. 3. The cable fault tester finds the fault point through four main parts: cable fault location host, locator, Pathfinder and high-voltage signal generator.
Do You Understand the Function of Cable Fault Tester
Do You Understand the Function of Cable Fault Tester
In the whole process of application of high-voltage wires and cables, if a common fault occurs, it will lead to the final disconnection of the power supply system. It is necessary to carry out inspection immediately and quickly find the common fault point. The cable fault tester must be used. In this paper, we will briefly introduce in detail the functions of the cable fault tester. System software composition of cable fault tester: the cable fault tester is composed of test host, relative path signal generator, relative path signal receiver and detector. The cable fault tester includes integrated computer, bottom pressure single pulse generation and data processing methods to detect the spacing of common faults, and can also be used to accurately measure the length of cable and the rapid propagation of electromagnetic wave in cable. The relative path signal generator generates intermittent sinusoidal waveform data signals with a frequency of 30kHz and a force of 30V to find the relative path of the cable. The relative path signal receiver is used to receive the relative path data signal to search the cable route and estimate the depth of cable laying. The detector is used to accurately locate common fault points. Technical characteristics of cable fault tester: 1. Fault test system software: it can detect various common faults of various wires and cables, as well as the common faults of lead and short circuit faults of coaxial output power cables and local call cables. It can measure the propagation rate of electromagnetic waves in all known cable wires. The detection distance shall not be less than 16km 2. Relative path signal generator: output data signal frequency 30kHz, oscillation method, intermittent 3. Detector: detection sensitivity: 50 & omega; The video signal of the internal resistance outputs a 300Hz data signal, and the designated instrument inputs the data signal no more than 10&mu under the condition that the output remains 2V and the signal-to-noise ratio is better than 20:1; v. Input impedance: not less than 1.2k & omega;. Fault test method: the fault test is generally divided into the following processes: first find out the basic situation of common fault cable: measure the grounding resistance of common fault cable with megger and multimeter, and accurately measure the total length of cable with bottom voltage single pulse, whether there is disconnection, short circuit fault, etc. Second, according to the details of common faults, determine the appropriate detection methods and accurately measure the cable fault spacing. Generally, people set the common disconnection faults and resistance measurements at 100 & omega; The following cable faults are called low resistance (pilot) common faults, which are detected by bottom voltage single pulse method, and other common faults are detected by impulse flash method or direct flash method. Third, detect the relative path and depth of cable laying around common fault points. Identify the exact location of common fault points. Disconnect all connections between the cable head end and the terminal equipment head before testing. The control panel of the detection system software is equipped with two buttons for inputting amplitude and offset, which are respectively used to adjust the left and right parts of the input data signal strength and wave pattern for the next sampling.
Home Robots Can Be Hacked to Spy and Attack Their Owners  and This Clip of a Mini Android Wielding a
Home Robots Can Be Hacked to Spy and Attack Their Owners and This Clip of a Mini Android Wielding a
THIS adorable humanoid robot can be programmed to stab you when you're not looking.UBTech's home android Alpha 2 - which has proved a particular hit in the US - was hacked by security experts who used the experiment as way to expose how vulnerable the technology we are allowing into our homes is.In the clip, little Alpha 2 can be seen furiously stabbing a tomato with a screwdriver after researchers at security company IOActive managed to hack the software that controls it.They were also able to turn two other popular robot brands, NAO and Pepper, to capture video and audio as they manoeuvred around a home and send it to whoever they wanted.Factory robots could also be hacked, they warned.According to the boffins, a brand of industrial robots called Cobots that work alongside humans, are a potential hazard.They usually include certain safety and collision detection technologies to prevent possible injury from use of the products but an experiment has proven thatthese robots can be hacked remotely and used to injure humans around them."Even running at slow speeds, their force is more than sufficient to cause a skull fracture," IOActive wrote in a statement.Bride-to-be Regina Allen Elsea, 20, was recently crushed to death by a robot just two weeks before she was due to marry the love of her life.This research follows an open letter to the UN from tech leaders such as Elon Musk urging it to ban killer robots for warfare.But IOActivewarned that we also need to evaluate the security and dangers of robotic devices that are appearing in our homes and workplaces.Lucas Apa, IOActive principal security consultant, said: "The brightest minds in the word have spoken out this week about the potential dangers of robots, but I would argue that it isn't just the use of robots in the defence industry we need to worry about, it's also the ones in our homes and factories."I have no doubt that devices used by armed forces will be infinitely better secured than the devices weve tested but nothing is fool proof."Tech leaders already want killer robots banned for doing what theyre meant to do. Just imagine if they go rogue or do what malicious hackers tell them to do instead."We pay for your stories! Do you have a story for The Sun Online news team? Email us attips@the-sun.co.ukor call 0207 782 4368 . We pay forvideostoo. Clickheretouploadyours
Composition of Mine Cable Fault Tester
Composition of Mine Cable Fault Tester
1. The mine cable fault tester is composed of control part (low voltage) and high voltage rectifier, discharge and test part. Sufficient safety space shall be reserved between high and low pressure room, high and low pressure room and shell. 2. In order to ensure the safety of equipment and personnel, special personnel must operate with keys before high-voltage startup. 3. During each flaw detection or cable test, it can ensure that the high voltage rises slowly from the zero position, with the shape of high and low voltage limit. The pressure rise or fall process is controlled by the button, the voltage rise and fall rate is stable, and the operation is safe and simple. 4. The DC withstand voltage test time can be automatically carried out after digital (or manually controlled), and the test time is accurate and reliable. 5. The leakage current can be measured at any time according to the needs of the withstand voltage test process. 6. The mine cable fault tester has over-current and short-circuit protection, startup warning and over-current protection. 7. The control panel is equipped with power switch, high-voltage start, high-voltage stop, step-up, step-down and other switches or buttons, voltage withstand test, digital time timing relay, etc. 8. There are high voltage, leakage current, low voltage total current and other measuring meters on the display board, power supply, high voltage, timing and other indicator lights, curve observation window for ball gap discharge, etc. 9. Special high voltage discharge * * is equipped for discharge after each flaw detection or test to ensure safety. There is a grounding mark at the bottom of the box. Dear customers: the company also has cable fault detector, buried cable fault detector and underground pipeline detector products. You can call the company's service phone through the web page to learn more product details. Perfect service is our pursuit. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
How to Quickly Locate Cable Faults
How to Quickly Locate Cable Faults
With the different cable laying methods, the difficulty of cable fault location is gradually increasing. Among them, the positioning and search of bridge, tunnel and open laying in ditch is relatively simple, and the positioning and search of direct burial is the most difficult. When the fault nature is simple, the special cable fault location equipment can be used to locate the fault within dozens of minutes. When the fault is special, it often takes 4-5 days or even longer to locate the fault. How to quickly locate cable faults? When using echo method for cable fault location, sometimes by transferring the fault phase and wiring mode, complex faults are often transformed into simple faults, and the fault location is quickly determined to win time for the emergency repair of on-site lines, which is of great significance to the power supply user department. Low voltage power cables are generally multi-core cables. After laying and continuous use, they generally show two core and multi-core phase to phase or phase to ground short circuit faults. Sometimes, when it is detected that the fault waveform collected by a core is not ideal, it can be considered to convert the wiring to other fault cores for fault waveform detection, which often has unexpected effects. The collected and detected waveforms will become more typical and regular, so the specific location of cable fault point can be determined quickly. During the long-term on-site measurement of cable customers, it is found that the fault of small cross-section copper core directly buried power cable (35mm2 and below) and aluminum core cable may be accompanied by short-circuit and wire breaking fault at the same time. During on-site detection, changing the short-circuit fault to wire breaking fault measurement according to the different fault nature of each fault core will often double everything with half the effort. For the medium voltage direct buried power cable with extruded armor as the inner lining, the fault is mostly caused by external mechanical damage. When the insulating core fails, the inner lining may have been damaged. In case of special cable insulation fault, it is difficult to collect waveform with professional cable fault instrument. It can be considered to use the acoustic method to apply the high-voltage pulse directly between the steel strip and copper shielding layer of the cable, which will often be fixed quickly. In the field measurement process, we also found that when using the acoustic measurement method to locate the fault point of low-voltage cable, when the high-voltage line and ground wire are connected between the bad phase and the metal shield or armor, the sound is very small, so the probe can not be used to listen to the fixed point, and the effect is not ideal. Through the actual listening side on site for many times, it is found that if the distance between the discharge ball gap is appropriately increased, and the high voltage and grounding wire are connected between the two phases of the fault, the discharge sound will become larger and the fault point will be determined quickly.
What Are the Components of the Underground Pipeline Detector
What Are the Components of the Underground Pipeline Detector
The underground pipeline detector can quickly and accurately detect the location, direction and depth of underground water pipelines, metal pipelines and cables, as well as the location and size of damage points of anti-corrosion coatings of steel pipelines without damaging the ground covering soil. It is one of the necessary instruments for the transformation, maintenance and general survey of underground pipelines in water supply companies, gas companies, railway communications, industrial and mining and infrastructure units. Explain the components of underground pipeline detector 1. High voltage source: used to support discharge; Raise the DC and AC power supply to 3 4KV high voltage, the current is about 20mA high voltage power supply, and the other is 20kHz or 40KHz high frequency power supply. 2. Discharge electrode: send out high-voltage arc to melt the optical fiber; A pair of electrodes * * in a 30 degree conical shape are processed from gold tungsten rods and installed on the electrode frame. The electrode * * spacing is generally 0.7mm; When the high-voltage source is connected, an arc will be generated to fuse the optical fiber at the center of the arc. The service life of the electrode is generally 4000 times. If the electrode is consumed excessively and continues to be used, the connection loss will be increased. Underground pipeline detector 3. Optical fiber regulating device: used to align the optical fiber; The fine adjustment of the V-groove is realized by a spiral micrometer installed at the end of the long benchmark. The optical fiber placed in the v-lane slot is fixed by the mechanical pressing plate. The fine adjustment of the X and Y directions and the Z axis of the optical fiber are orthogonal to each other. The fine adjustment range is more than ± 10um and the adjustment accuracy is ± 0.1mm. Slide rail of optical fiber welding machine 4. Controller: system algorithm processing; It includes telepresence unit and microprocessor, which is used to complete automatic adjustment, pre fusion, fusion and connection loss estimation. 5. Microscope (optical system): used to help observe the state of optical fiber and welding quality. 6. Underground pipeline detector heater (heat furnace): it is used to heat shrink the heat shrink pipe and increase the strength of optical fiber connection.
Application Scope of Underground Pipeline Detector
Application Scope of Underground Pipeline Detector
Underground pipeline detection method is one of the commonly used geophysical detection methods. Generally, there are two methods: the first is to use DC detection method for geophysical detection. Specifically, in the process of detection, two power supply electrodes are mainly used for corresponding DC power supply, and a power supply cycle is formed underground, Through the circulating power supply to ensure the measurement of underground current density, we can effectively judge the specific location of buried metal pipelines. Generally, the detection using this method is mainly based on the corresponding metal pipeline. This method is based on the difference of current density. Generally, the most commonly used method of this technology is the high-density resistivity method for corresponding measurement. For example, during the measurement of underground pipelines in a city, the direct current detection method is used for geophysical detection, and the location of metal pipelines in concrete materials is effectively found; The second method is to use the alternating current detection method for geophysical detection. Specifically, in the process of detection, the corresponding conductivity and corresponding magnetic transformation generated by the alternating current in the process of magnetic field transformation are mainly used. In the process of detection, the corresponding underground pipelines are detected through the magnetic field formed by the alternating current, So as to effectively ensure the accuracy of underground pipeline detection. Through the use of alternating current detection method for geophysical exploration, we can effectively find the differences between underground media, and find out the specific problems and sources of these differences through the analysis of these differences. Specifically, these methods have the characteristics of uniform measurement and long working time. They are one of the effective means for underground pipeline detection.
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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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