What Is Rj45 Cable Tester?

What Is Rj45 Cable Tester?

2021-10-07
NOYAFA
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Brief Introduction of Power Cable Fault Tester
Brief Introduction of Power Cable Fault Tester
Brief introduction of power cable fault tester power cable fault tester is a special cable detection equipment used to solve the test of open circuit, short circuit, grounding, low resistance, high resistance flashover and high resistance leakage faults of power cables, as well as the * * test of 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. Brief introduction power cable fault tester is applied to various industries such as power, communication, petrochemical industry, coal mine, metallurgy, aerospace and so on. Xi'an cable fault tester is a pioneer in the field of cable fault testing. Based on the industrial embedded computer platform system, the advanced network and digital communication technology are adopted, which greatly improves the use function and test accuracy of the instrument. As we all know, no matter the high resistance fault or the rear * * point of the cable, it is inseparable from the special booster device for cable fault detection. In the past, the test transformer, operation box and pulse capacitor were used to boost the voltage, which has the disadvantages of bulkiness and complex wiring. The cable fault high-voltage signal generator solved this problem and made the cable fault detection portable, This * * improvement has been highly praised by the industry. Dear customers: the company also has underground pipeline detector, high-voltage cable fault tester and cable fault locator products. You can call the company's service phone through the website to learn more product details. Perfect and beautiful service is our pursuit. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
Function of Underground Pipeline Detector in Cable Maintenance
Function of Underground Pipeline Detector in Cable Maintenance
Surface water pipelines refer to water supply, drainage (rainwater, sewage), gas, electric power, communication, heating, industrial and other pipelines. It is an important part of urban infrastructure and the basic basis of urban planning, construction and management. At present, the electromagnetic method based on the law of electromagnetic induction is the most convenient, effective and commonly used in the detection of underground pipelines. Underground pipeline detector is one such device. The receiver measures the change of the secondary field generated by the underground pipeline under the action of the transmitting airport on the ground, so as to judge the spatial position of the underground pipeline. It is generally believed that the secondary field excited by a straight line can be regarded as the electromagnetic field generated by an infinite straight line. The receiving device locates the pipeline and determines the depth according to such electromagnetic field changes. The experimental results show that the measurement results are very accurate without the interference of other pipeline fields. In order to detect pipelines accurately, quickly and efficiently, different detection methods should be selected according to the characteristics of underground pipelines. The buried pipe detector uses the principle of electromagnetic induction to detect the precise direction and depth of underground metal pipelines and cables, and find out the fault points outside the pipeline. The buried pipe detector has the functions of intelligent, graphic operation indication and audio modulation indication of all Chinese characters. It is the most convenient buried pipe detector. The built-in ohmmeter of the transmitter can automatically measure the loop resistance and automatically match the continuous output impedance to ensure the excellent output signal. The instrument can select the coupling according to the needs of practical application. Under the condition of continuous power supply, it can be used to find the path of live cable for testing. Using the 50Hz detection function of the receiver, it can also track the 50Hz power frequency signal sent by the running cable, truly achieve one machine with multiple functions, and has the best performance and cost performance. Its basic working principle is that the transmitter generates electromagnetic wave and transmits the transmitted signal to the detected underground metal pipeline through different transmission connection modes. When the underground metal pipeline senses electromagnetic wave, induced current is generated on its surface, and the induced current propagates far along the metal pipeline. In the process of current propagation, The electromagnetic wave is radiated to the ground through the underground metal pipeline. Therefore, when the underground pipeline detector detects on the ground, the electromagnetic wave signal will be received on the ground directly above the underground metal pipeline. Through the change of signal strength, the position and direction of the underground metal pipeline can be judged. According to the detection principle, underground pipeline detectors are divided into two categories. One is to detect metal markings in metal pipelines, electric / optical cables and some non-metallic pipelines by using the principle of electromagnetic induction, which is called pipeline detectors for short; The other is the use of electromagnetic waves to detect underground pipelines of various materials, which can also be used to find buried objects, commonly known as radar or pipeline radar.
In Depth Understanding of Live Cable Identifier
In Depth Understanding of Live Cable Identifier
Everyone should be familiar with the live cable identifier. Xiaobian introduced it in the previous article. It is a very common cable construction and maintenance equipment. At present, there are both instruments for identifying non operating cables and instruments for identifying operating cables. Now we will introduce some knowledge about live cable recognizer. 1、 The transmitter panel of live cable identification instrument is introduced as follows: 1. Signal output port: this port sends the signal to the cable to be tested through direct connection coupling. The instrument can automatically detect the connection mode (direct connection or coupling). When no output line is connected to this port, the screen mode menu displays idle, and no signal is output at this time. 2. Frequency switching: the instrument has four output frequencies: low frequency, intermediate frequency, high frequency and radio frequency. It is suitable for different test systems and has strong anti-interference ability. When this button is pressed, the frequency will be switched between the above frequencies in turn. 3. Power regulation: the instrument adopts constant power output mode, and low, medium and high gears are optional. When this button is pressed, the power will be switched between the above gears. 4. Backlight switch: the instrument has a backlight controllable function. The backlight can be turned off during the day to save power. At night, the backlight can be turned on for test. When this button is pressed, the backlight will be turned on. When it is pressed again, the backlight will be turned off. 5. Power switch: the main switch of the whole instrument. When this button is pressed, the instrument enters the test interface. 6. Liquid crystal display of cable identification instrument: the instrument adopts liquid crystal display for man-machine dialogue. 2、 Precautions for the use of live cable identifier 1. If the operating cable has voltage and there is no load, there is no current flowing on the cable. At this time, the magnetic field cannot be detected. It is considered to be an uncharged cable, which is very easy to misjudge. 2. If the cable is not running, but if this cable is parallel to other running cables, there will be induced current and magnetic field. At this time, the instrument will also have indication, and misjudgment will occur. 3. If there are multiple cables in the cable trench, these multiple cables will generate a magnetic field. At this time, there will be a magnetic field generated by 50Hz current in the whole area. At this time, there will be a magnetic field in the whole area, which makes the discrimination impossible. It is easy to misjudge. 3、 Basic parameters of live cable recognizer insert the red and black wiring plugs of the transmitting caliper a into the two red and black wiring posts corresponding to the transmitting source, and clamp the transmitting caliper a on the identified cable. The arrow on the transmitting caliper a points to the cable terminal. On the identified cable two meters away from the transmitting caliper, clamp the receiving caliper B to the cable, and the arrow on the caliper must point to the cable terminal. Then check the current direction and test connection direction. At the identification point, identify each cable with receiving caliper B. During identification, the arrow on the receiving caliper must always point to the terminal direction of the cable, and the cable shall be clamped one by one. On the identified cable, the current meter pointer of the receiver must be deflected to the right, and the audible and visual alarm prompt shall be given at the same time.
5 Reasons a Voltage Detector Pen Is Good for You
5 Reasons a Voltage Detector Pen Is Good for You
A voltage detector is a quick and inexpensive method to check the presence of voltage in an AC circuit, switch or socket without actually working with it. Also known as a voltage rod, rod, sniffer or pin, a voltage detector clings to a shirt pocket and beeps or glows when it detects voltage in a conductive part of the insulation.Voltage detectors are used to repair electrical circuits, detect live neutral wires and in other situations where you need to verify the presence of electric current. These types of voltage detectors are designed for the non-contact detection of electrical circuits in residential, commercial and industrial buildings. Random contact with live electrical conductors is no problem, and the detector evaluates the voltage level in the electrical safety category for which it is used.The voltage tester Klein Tools ET40 is ideal for checking regular electrical cables, door bell sockets, lights and other devices. It has functions for displaying positive and negative DC polarity and is able to detect DC voltage currents as low as 1.5 V. In addition to detecting standard voltages and low voltages, voltage detectors and LED testers can also detect rated voltages.A good voltage tester not only saves you time, but also gives you the certainty that your electricity prices are normal. The best voltage detector pins operate in a wide voltage range and are able to provide acoustic and acoustic feedback when detecting voltage. They are small enough to be transported and provide a precise reading that tells the user whether voltage is present or not.Reinforced electronic testers (also called electrical testers, pins and voltage detectors) rely on capacitive currents to detect changes in the electric field of an energy-charged object. Non-contact voltage testers (test pins, voltage sensors, voltage testers and pins they know) are the safest way to ensure that an electrical conductor has no voltage without touching it or suffering an electric shock. They work by detecting changes in an electric field surrounding an object conducting alternating or alternating current.Non-contact testers allow you to check the voltage of a wire or device without having to touch the wire or part. A voltage tester can be used to test the presence of voltage when a multimeter cannot detect it and to measure and display the exact amount of available voltage. These testers are designed to detect the main voltage and do not provide any indication of low voltage control circuits used in the bells or HVAC controls.A further limitation is that DC voltage can not be detected with this method because DC currents do not flow in a uniform state through capacitors and non-contact testers that detect electrical fields cannot be activated. You cannot detect voltage through shielded or armoured cables, and this is a basic limitation due to the Faraday cage effect. A TONG or AMmeter detects changes in magnetic fields, while a detector uses current flowing through the wire in question, and it senses alternating electric fields emitted by AC conductors.Given the variety of products in the contactless voltage tester category, you can expect different types of NCVTs, but you can imagine that there are more contactless DC voltage testers and contactless DC voltage testers than there are regular DC testers on the market. Remember to use a quality insulation resistance tester when you need to measure the insulation around your circuit. You want a non-contact voltage tester that comes with a hook so that you can put it in your shirt pocket.I call it the voltage sniffer, but the technical name for it is the capacitive voltage sensor. It is supplied with an alligator clip, which is interchangeable with test cables, and a holster to keep it handy. It uses black magic to determine whether wires are live or not, and it is 100% reliable at all times.
What Are the Test Steps for Cable Failure
What Are the Test Steps for Cable Failure
The detection of cable fault generally goes through four steps: diagnosis, ranging, path finding and fixed point. 1. Diagnose the nature of cable fault, that is, determine the type and severity of fault, so that testers can suit the remedy to the case and select appropriate cable fault location and fixed-point methods. Measure the fault resistance with a megger and multimeter to determine whether the cable fault is high resistance or low resistance; Flashover or closed fault; Whether it is grounding, short circuit, disconnection, or a mixture of them; Is it single-phase, two-phase or three-phase fault. 2. Ranging cable fault location, also known as rough measurement, uses instruments to determine the fault distance at one end of the cable. The common fault location methods on the site include classical bridge method and modern traveling wave method. Use jcd-971 cable fault locator or cd-71 cable fault locator. 3. Use pd2000 cable path identifier or cd-12 / 22 cable path identifier produced by Zibo Electric Co., Ltd. for path finding. 4. Fault location acoustic magnetic synchronization method: use cd-81 cable fault locator to synchronize with the discharged electromagnetic signal and digitally sample the sound signal, The sound waveform at the moment of discharge is displayed on the LCD screen. The waveform can be maintained continuously for the operator to distinguish carefully, avoiding the disadvantage of transient sound. Moreover, the actual discharge waveform is obviously different from the surrounding noise. More importantly, the sound waveforms of multiple discharges are very similar. When the sound waveforms of multiple discharges are observed to be the same, It can be clearly judged that the discharge sound has been collected. Because the response range of acoustic measurement method is generally very small, when the discharge sound is heard, it is very close to the fault point, generally not more than 5m, or even within 1-2m
Basic Functions of Cable Fault Locator
Basic Functions of Cable Fault Locator
The basic function of cable fault locator is in the power industry and some industries using cables, especially in some complex power systems. It is very difficult to find the fault of underground cable lines. However, in this regard, the continuous emergence of equipment with various functions and simple operation can not only reduce the high cost of fault detection, but also reduce the inevitable long-time power failure when difficult to find (cable fault locator) cable fault, which brings a lot of convenience to troubleshooting. Direct buried cable fault detection in underground direct buried cable and underground residential power distribution (URD) system is a very time-consuming thing, and will cause very inconvenient power failure to users. Some technologies may also damage the cable. For some equipment with high technical requirements, its operation is more complex, and only operators with strict training can use it, which brings a lot of inconvenience to the popularization and application of this kind of technical equipment. Therefore, the selection of appropriate technology depends partly on the knowledge of cable system design understood by the designer of fault detector, and also partly on the professional and technical knowledge of equipment and operators in this regard. With appropriate equipment and professional technology working on site, it is the first step to detect faults quickly and effectively. Hammering (pulse) method many power companies use hammering (pulse) method. This technique is effective in detecting high resistance faults in a simple (cable fault locator) cable system. The hammering method includes using a pulse or impulse voltage to impact the power cut cable. When an effective high voltage pulse strikes the fault area, the fault point flashover and produces a hammering sound that can be heard by the operator along the cable surface. However, detecting cable faults often requires several hammers, and repeated shocks may damage the cable. Dear customers: the company also has products such as underground cable fault tester, cable identifier and cable tie tester. You can call the company's service phone through the web page to learn more product details. Perfect and beautiful service is our pursuit. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
Design of Consumptive Optical Fiber High Temperature Measuring Instrument
Design of Consumptive Optical Fiber High Temperature Measuring Instrument
1 IntroductionHigh temperature measurement plays an important role in aerospace, materials, energy, chemical industry, metallurgy and other fields. At present, in high temperature measurement, according to whether the measuring probe is in contact with the measured object, the temperature measuring instruments are divided into contact and non-contact.With the emergence of optical fiber technology, it provides conditions for the realization of contact temperature measurement. The contact optical fiber temperature measurement adopts a long quartz optical fiber as the temperature measurement probe and transmission system to keep the instrument away from the site with bad environment. At the same time, the optical fiber optical path is not affected by the environmental atmosphere, which greatly improves the environmental adaptability of the temperature measurement system. However, because the probe adopts the general radiation receiving principle, it is still difficult to solve the problem of emissivity. In order to overcome this problem, the principle of ash body temperature measurement is proposed. The colorimetric method can greatly reduce the influence of emissivity on the temperature measurement results. Under the best conditions, the influence can be reduced to zero. The advantage of such temperature measurement is that the temperature measurement response speed is fast, and the response speed is about 10s [3].The consumable optical fiber high temperature measuring instrument developed in this paper overcomes the above shortcomings and is a new method to measure the temperature of molten metal. Its temperature measurement accuracy is the same as that of the consumption thermocouple, but the temperature measurement cost is greatly reduced, which has great economic benefits and can completely replace the consumption thermocouple.2 principle of colorimetric temperature measurementColorimetric temperature measurement is a method to determine the temperature of an object by measuring the ratio of the radiance of the object at two different wavelengths. Its characteristic is that it can eliminate the interference caused by atmospheric, smoke, dust, ambient temperature and other factors on the measurement path.3 selection of working wavelengthAs can be seen from equation (3), it is very important to correctly select the wavelength and wavelength. Generally, the spectral radiance of the measured object is related to wavelength and temperature, as shown in Figure 1. The ordinate in the figure represents the radiation brightness of the blackbody, the abscissa represents the wavelength, and the temperature of the curve is getting higher and higher from bottom to top.From the curve in the figure, we can see several characteristics of blackbody radiation: (1) the total radiance increases rapidly with the increase of temperature. The higher the temperature, the greater the spectral radiance; (2) When the temperature is constant, the spectral radiance changes according to a certain law with different wavelengths, and the curve has a maximum value. The wavelength here is defined as that when the wavelength is less than, the radiance increases with the increase of the wavelength, and when the wavelength is less than, the change law is opposite; (3) When the temperature increases, the peak wavelength of spectral radiance moves to the short wave direction, the radiance of the object increases, and the luminous color also changes.The wavelength range is preliminarily set at 800 1000 nm, and there is no main absorption band of water vapor in this range, which can reduce the measurement error. When it is 800nm and 1000nm respectively, the relative sensitivity curve is shown in Fig. 2. The relative sensitivity of curve 1 in the figure is high. Therefore, it can be seen that it should be near 800nm. According to the relationship between the spectral response of the photodetector and temperature, it is required to have a good linear relationship. According to the linear relationship, it is better to take it near 950nm.After the experiment, the final choice = 890nm, = 940nm, the colorimetric temperature measurement effect is better.Fig. 2 relation curve between relative sensitivity and temperature
Analyze the Problems That May Be Encountered in the Fault Detection of Pipeline Detector
Analyze the Problems That May Be Encountered in the Fault Detection of Pipeline Detector
Pipeline detector is one of the important equipment for underground pipeline survey. It can accurately and quickly detect the direction and location of various underground facilities under the condition of ensuring the integrity of ground covering soil. What we want to know today is the purchase method of the detector and some problems that may be encountered in the fault detection of the pipeline detector. You can study it carefully. The pipeline detector can quickly and accurately detect the position, direction and depth of underground water pipeline, metal pipeline and cable, as well as the position and size of the damage point of the anti-corrosion coating of steel pipeline without damaging the ground covering soil. It is one of the necessary instruments for water supply companies, gas companies, railway communications, municipal construction, industrial and mining, capital construction units to transform, maintain and survey underground pipelines. How to choose a pipeline detector? Here, I share my views with you, hoping to be helpful to you. 1. According to your own needs: many pipeline instruments are only suitable for some detection requirements. When selecting, you should understand the application scope of pipeline instruments. 2. Understand the test method of the pipeline instrument, whether the operation is simpler and the interface is more intuitive. 3. Understand the function of the pipeline instrument and whether the sounding capacity meets your needs. 4. Whether the configuration of accessories is complete, such as clamp (generally used for cable detection in dense areas), rechargeable battery (saving detection cost), etc. 5. The sustainable development of the instrument and the ever-changing technology are also a test standard of the instrument. 6. The compatibility of the instrument, whether the reception and transmission frequencies are wide, which is conducive to detection and expansion of use. In urban construction, urban underground pipeline data is very important. Pipeline detector manufacturers understand that many underground pipelines are troubled by aging and drawing changes during construction. At present, the detection work has been carried out in an all-round way. With the help of pipeline detector, supervise the whole process of project quality, project progress, operation safety and achievement archiving of underground pipeline detection. After the general survey, the results table will be prepared, the data function of the pipeline detector will be used, and the database and underground pipeline information management system will be established. It is a common situation for us to carry out detection in the completed area, which is a common problem in the fault detection of pipeline detector. For example, the general urban exploration work will encounter the interference of many urban buildings. At this time, it is necessary to rely on the sensing function of the pipeline detector for underground exploration. In the completed area, the operation procedure of the pipeline detector is: first, use the geophysical method to detect the category pipe diameter of each pipeline or the items of the inner bottom, upper pipe and outer top of the cross-section pipe (ditch) on the spot, and mark each characteristic point on the spot, then use the total station or RTK to measure the three-dimensional coordinates of each characteristic point, and then use the mapping software to draw the collected data on the topographic map for editing.
Wire  Trackers
Wire Trackers
The introduction of wire trackerWire trackers are the latest trend in the fishing world. They are a device that is used to detect fish by sound. It emits an electric signal that is picked up by a receiver, giving you both your distance and direction from the fish. These devices come in handy especially when you don't have access to GPS or other methods of determining location.These devices are designed for both professionals and beginners alike and they are easy to use. Wire trackers are not only targeted towards fishermen but also for avid birdwatchers, hunters, hikers, geocachers, boaters and anyone who needs to know their distance from a particular point.Wire trackers have been around since the late 1970s but didn't become popular until about five years ago when they started becoming popular among professional fisherman in Europe andTips for wire trackerIn order to be successful in writing, it is important to understand the essence of wire tracking. With this explained, you will be able to write more professional content and grow your career.Wire tracking is a process where copywriters find out what a company's goals are and then create content that they can share with the company while also promoting their own work.It’s important for copywriters to know what sets them apart from wire trackers so that they can provide value-added services for their clients. This includes providing design services, social media engagement services, and website development services.How to use wire tracker?Wire trackers are not a brand new tool, but they are gaining traction as part of the marketing mix. They allow marketers to measure and analyze their online performance in real time.Many websites use wire trackers to measure whether the content they produce is performing well or not. This helps them generate accurate and relevant content that people want to read. The most effective wire tracker allows you to view your website from multiple different perspectives, including social media, search engines, referrals and more.Wire trackers can capture important information such as sentiment analysis or SEO insights on how visitors interact with a website’s content.The specifications of wire trackerWire trackers are used in construction to help builders measure walls. In houses, they are used for measuring and marking the location of electrical outlets or switches.When it comes to house constructions, wire trackers come in handy. They help with measuring and marking the location of outlets or switches. For other areas, they have been used in construction as well as architecture where they can be attached to beams or posts so that their lengths can be measured easily.The product instructions of wire trackerWire trackers are a type of wire used in electrical wiring. They serve to keep the individual strands of wire in one direction for easy wire routing.One of the most common uses for wire trackers is to organize and keep all the wires in one direction on a multistrand cable, as seen below:A typical use for these tools is to make sure that every single strand of wire can be routed together without having to untangle them or repeatedly check that they are properly connected.The application of wire trackerWiretracker is a device that has been used to create wire coat hangers and this tool is most often used in the manufacturing industry. It is also being used in construction and manufacturing industries. In the past, it was not possible to predict how much wire was needed for a particular project, but now with wire tracker it is possible to do so.Wire tracker makes sure that the process of production remains accurate by providing accurate data about the length of wire required for each stage.Wiretracker has made its way into many fields other than just manufacturing. For example, hospitals use it when they need to build their wards or construct space frames for their buildings.
Application Field of Cable Fault Locator
Application Field of Cable Fault Locator
The application field of cable fault locator is in the power industry and some industries using cables, especially in some complex power systems, it is very difficult to find the fault of underground cable lines. However, in this regard, the continuous emergence of equipment with various functions and simple operation can not only reduce the high cost of fault detection, but also reduce the inevitable long-time power failure when difficult to find (cable fault locator) cable fault, which brings a lot of convenience to troubleshooting. Direct buried cable fault detection in underground direct buried cable and underground residential power distribution (URD) system is a very time-consuming thing, and will cause very inconvenient power failure to users. Some technologies may also damage the cable. For some equipment with high technical requirements, its operation is more complex, and only operators with strict training can use it, which brings a lot of inconvenience to the popularization and application of this kind of technical equipment. Therefore, the selection of appropriate technology depends partly on the knowledge of cable system design understood by the designer of fault detector, and also partly on the professional and technical knowledge of equipment and operators in this regard. With appropriate equipment and professional technology working on site, it is the first step to detect faults quickly and effectively. Hammering (pulse) method many power companies use hammering (pulse) method. This technique is effective in detecting high resistance faults in a simple (cable fault locator) cable system. The hammering method includes using a pulse or impulse voltage to impact the power cut cable. When an effective high voltage pulse strikes the fault area, the fault point flashover and produces a hammering sound that can be heard by the operator along the cable surface. However, detecting cable faults often requires several hammers, and repeated shocks may damage the cable. Dear customers: the company also has underground cable fault tester, cable fault tester, mining cable fault tester and other products. You can call the company's service phone through the web page to learn more product details. Perfect and beautiful service is our pursuit. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
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