Laser Level Meter Buying Guide

Laser Level Meter Buying Guide

2021-11-09
NOYAFA
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SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED is at the front of quality in the field of laser level meter and we have executed a strict quality control system. To prevent any defects, we have established a system of screening checkpoints to ensure that defective parts are not passed to the next process and we ensure that the job performed at each manufacturing step conforms 100% to quality standards. NOYAFA starts from nothing and grows into a stable market that lasts the test of time. Our brand has achieved high customer satisfaction - many customers tend to continue to use and repurchase our products instead of turning to our competitors. Our brand seems to never go out of style because customer demand continues to build over time - almost the sales of each product is increasing.Quality services offered at Best Cable Tester Supplier in China _ Noyafa is a fundamental element of our business. We have adopted several methods to improve quality service at our business, from having clearly defined and measured service goals and motivating our employees, to utilizing customer feedback and updating our service tools to better serve our customers.
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Video Tutorial for Wire Tester
Video Tutorial for Wire Tester
A coding error is a bug or a mistake that can be found in your application code.In the past, the best way to find coding errors was to use manual testing such as "jumping around through different screens" and "looking for things that look wrong". These methods are time-consuming and hard to perfect.Nowadays, developers use tools like JavaScript and Java Scripting Language (JSL) to automate their testing. This helps them find coding errors in web applications much faster than before. It also helps them avoid premature optimization of source code (i.e., over-optimization). The automation process finds more relevant bugs more quickly too: it doesn't have to search for common mistakes like typing an incorrect variable name or forgetting a specific function call name.Content is not just about the words. It also needs to be converted into readable code. Since a lot of the content generated by AI writers is creative, it needs to be tested as well.For example, if your content consists of a series of 10 similar pictures that are linked together but each picture has its own unique caption then you will need to test them all in order to find out which one contains the coding mistake.Get your website tested by a web application tester before it goes live. There are great tools and plenty of resources that could be used to do this. One useful tool I have personally found is the WireTender. This tool makes it extremely easy to test websites with little coding knowledge while keeping in mind your budget, time and testing needs.If you are looking for a way to detect coding errors in your Web applications, then using a good tool is the best way to do it.One of the common mistakes is to use a tool without understanding what it does. So, it is better to learn about what it does before trying out your own coding job.With computer science and coding on the rise, there is a lot of information to be found on the Internet about it. It seems that we have become an active part of this field now.The problem with so much information is that it often contains too many false positives in terms of coding errors.To help you identify them quickly, here are some tips:We all know that developing websites and applications is a difficult task. Even the most experienced developers have to deal with errors in code. With the help of online wire tester, you can find such errors before your clients do and avoid them.While no one can pinpoint exactly what is going wrong in web application, web wire testers have made life for developers easier by giving them an easy to use tool to find coding mistakes in their applications.We have seen some promising examples of AI writing assistants in the recent past. These include:Every software development team has its own way of testing applications. Some teams use XUnit, some use Selenium and others just test by hand. When you need to find coding error in your web application, you will usually address the issue by debugging code manually - and that is not always possible depending on the complexity of the problem.The best way to solve this problem is to hire a wire tester who can identify coding problems directly from your code base. The team should be able to produce a good set of tests very fast and accurately using an automated approach (a scripting language) so that you can concentrate on developing features instead of debugging them.An automated solution may help identify bugs more quickly than manual debugging as well as reducing or eliminating manual errors. To be effective, the process must be executedWhat is a wire tester?A wire tester tests network performance to ensure that its computer processing power is sufficient. A computer performance test involves sending a large amount of traffic across a network and measuring the speed of the response between client and server. The result of each test determines how fast the system can process requests and respond to them without interruption or delay.A wire tester is an expert in his field and has a thorough understanding of the technology and industry. A good wire tester can read manuals, write reports, test products, solve problems or find bugs in software. He also has a strong technical knowledge.
Working Principle of High Voltage Cable Fault Tester
Working Principle of High Voltage Cable Fault Tester
The working principle of high voltage cable fault tester is introduced. The product is also known as cable fault tester, high voltage cable fault tester, cable fault tester, point tester, path tester, cable fault Pathfinder, cable fault tracker, portable cable fault positioning system, cable fault flash tester, cable fault point tester and cable path tester, Smooth wired communication and power transmission depend on the normal operation of cable lines. Once the line is blocked, it will cause the communication to find out the fault in time and eliminate it quickly, which will cause great economic losses and poor social impact. Therefore, the cable fault tester is an important tool to maintain all kinds of cables. The cable fault intelligent tester adopts a variety of fault detection methods, applies contemporary * advanced electronic technology achievements and devices, adopts computer technology and special electronic technology, and combines the company's long-term successful experience in developing cable tester. It is a new high-tech, intelligent and fully functional product. Dear customers: the company also has cable fault detector, underground cable fault tester, cable fault locator 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!
How to Distinguish Between Phase Voltage and Line Voltage
How to Distinguish Between Phase Voltage and Line Voltage
What is the phase voltage? What is the line voltage? What are the relations and differences between them? This paper will interpret them one by one.Triangular connection and star connection without leading out neutral point have three terminal wires, three-phase system, three live wires, 380V, line voltage. The star connection leading out the neutral line includes three live lines, a total of four power lines, three-phase four wire system, one fire, one zero, 220V phase voltage. The line voltage is the vector sum of the phase voltages of two phases. Line voltage = 2 * phase voltage * cos30 degrees = root number 3 * phase voltage, i.e. 380 = root number 3 * 220Many times, the phase voltage is generally understood as the voltage between phases, that is, 380V, while the line voltage is understood as 220V, which is just the opposite.Concept:Phase voltage is what we often call 220V household voltage. The voltage between zero line and live line becomes phase voltage. In fact, all in our home are phase voltages.Line voltage refers to the voltage of any two live lines, that is, 380V, which is actually the phase voltage. The phase voltage is 220V and the line voltage is 380V.Relationship differences:In the process of long-distance power transmission, the higher the voltage, the lower the loss, which is why the country has been studying ultra-high voltage power transmission (I = u / R). Generally, the high-voltage power is transmitted to the end user, and then reduced to 220V / 380V through the step-down transformer to supply different users.For the three-phase four wire power network, the voltage between any one of the three phase lines and the zero line becomes the phase voltage; The voltage between any two of the three phase lines becomes the line voltage. The phase difference of the three-phase voltage is 120 degrees. The line voltage is the vector sum of the phase voltages of the two phases. The relationship between the line voltage and the phase voltage is: line voltage = 3 times the phase voltage of the root number, that is, 380V = 3 times the 220V of the root number (sorry, the mathematical root number 3 of the formula cannot be uploaded in the headline).The two-phase electricity is connected to the running three-phase motor, and the motor can still work. This is what we often say that the motor runs without phase, but it is easy to burn the motor in this way. After the three-phase motor with triangular connection is out of phase, the output power of the motor will also become two-thirds of the original three-phase power supply, and the other two windings only provide one-third of the power, resulting in three-phase imbalance, current imbalance and current imbalance. Of course, the motor is easier to burn out.After the star connected three-phase motor is out of phase, the motor output power is completely provided by two windings, and the load increases by 50% respectively. The other winding does not work, so the working current is unbalanced and the motor is easy to burn out. When two-phase electricity is connected to the stopped three-phase motor, the motor cannot be started. For single-phase motor, after connecting two 380V phase lines, the voltage becomes 380V, originally 220V. In this way, the voltage increases and the motor must be burned out.
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.
Working Principle of Live Cable Identification Instrument
Working Principle of Live Cable Identification Instrument
As the running live cable is not allowed to damage any grounding wire and other connecting wires, nor is it allowed to directly add the output signal of the live cable identifier transmitter to the cable phase line with high voltage. Two difficult problems need to be solved for live cable identification. One is how to couple the cable identification signal to the cable; Second, the coupled signal is generally small, and the operating cable may have 50Hz power frequency electromagnetic interference composed of 50Hz unbalanced current, induced 50Hz interference current, cable distributed capacitance current, etc. the high-sensitivity receiving caliper has the problem of how to resist 50Hz power frequency interference. The charged cable identification instrument developed by US adopts single chip microcomputer coding and decoding technology and PSK technology widely used in the field of communication. The phase coded signal with an average value of 0 is transmitted on the transmitting caliper, and the single chip microcomputer in the receiving caliper performs phase identification after filtering the received signal by hardware and software. When the receiving caliper cards the cable according to the current direction, the identified cable ammeter deviates to the right, accompanied by audible and visual indication. The current direction of other cables is opposite to that of the identified cable, and the ammeter pointer deviates to the left. No audible and visual indication. This reflects the uniqueness of the identified target cable. It is easy to distinguish the identified cable from multiple cables. In addition, since the signal current strength on the identified cable is the same throughout the line, the electromagnetic signal strength received by the receiving caliper along the cable is the same. In principle, the identified cable is not limited by the length of the identified cable. 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 cable fault tester, 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!
A Brief Guide to Selecting Cable Length Testers
A Brief Guide to Selecting Cable Length Testers
The LinkRunner LTRA offers a variety of cable testing techniques, including TDR, wiremapping, office identification and toning. The LTRA is designed to help troubleshoot wiring problems such as excessive cable routing, cable breaks, wall panels, patch panels, etc. It uses a combination of TDR and resistance measurements to map the wire, measure cable length and detect anomalies such as short, open or split pairs.The LRAT can measure an accurate cable length of 100 m or less with an accuracy of plus or minus 2 m. It can also be used to test terminated cables connected to an internal cable mapping port (WMAP) or an external cable identification accessory, as well as undermined and open cables. For pre-assembled and non-assembled cables, the fault detection is accurate to within 0.8 m of the error distance.This tester is a wiremapper that checks connections for CAT 5E / 6 certification, but can also test performance at higher frequencies. The threshold for the low voltage resistance is set insulated for 5 mO to a contact resistance of 0.1 O. This is measured with an embedded resistance at 100 O (1 mO x 1) to achieve an accuracy of less than -0.1 o (5 mO).In fact, certification testers can test wire diagrams, length attenuation, and crosstalk from one connection to another, helping you troubleshoot and save the results in a printed report for the customer. Cable certification testers are automated, so it's so easy to get a pass or fail at the touch of a button. Installers use certification testers to test cables that are being laid.There are a large number of cable testers on the market today, which means that there may be the right device for your purposes. To help you find the best network cable tester for your use I have compiled a list of test products that work well. As someone with extensive experience as an electrician, I can say that the Elegiant Network Cable Tester is the best tool for testing cable connections.I came across the Elegiant Network Cable Tester while working on establishing a LAN connection for a local company. As a consumer, I used the handheld network cable tester with RJ11, RJ12, RJ45 for the Cat 3 types Cat 5E, Cat 6 and Cat 6A. The broad compatibility of the device does not complicate your work in the analysis of cable connections.Cable Prowler (tm) provides complete cable testing for all categories of network, coaxial and telephone cables. Selecting, selecting and purchasing a suitable network cable tester is a complicated and challenging task. Purchasing the right network cable tester can save you a lot of inconvenience and trouble.Includes low-voltage and high-voltage subsystems, HVX-compliant automation, enabling extended testing of insulation resistance, dielectric breakthrough, Zener diode breakthrough, voltage upgrade, 4-wire measurements, and advanced measurements. With the changing landscape of corporate cabling, there is a demand for testing equipment you can rely on. Hopefully this article has helped you choose the best network cable tester for your profession and field of work.Advanced measurement options provide increased x5 / 2 wire resistance resolution for backplane, complex networks, capacitors, wire pairs, capacitors, twist pairs, and cable length testing. Copper remains the first choice for telephone data and video lines. Integrated Intellitone digital / analog tones are located on the cable or wire pair in the active network.It is an expensive device that requires trained operators and many failures due to problems with the wirecard. Other crews use low-cost cable ties to ensure the connections are correct before the certification tester is turned on. Instead of letting the crew find and fix their own wiremap problems, tests and fixes can be made before the cable is installed, and tester costs are not wasted on simple problems.
Working Principle of High Voltage Cable Fault Locator
Working Principle of High Voltage Cable Fault Locator
High voltage cable fault locator is a comprehensive cable fault detection instrument, which can test the high resistance flashover fault, high and low resistance grounding, short circuit, cable disconnection, poor contact and other faults of the cable. The cable fault locator is equipped with an acoustic pointing instrument, which can be used to accurately determine the accurate position of the fault point. It is especially suitable for testing power cables and communication cables of various models and different levels of voltage. The high voltage cable fault locator consists of three main parts: power cable fault tester host, cable fault locator and cable path tester. The host of the cable fault tester is used to measure the nature and total length of the cable fault and the approximate position between the cable fault point and the test end. The cable fault locator determines the exact location of the cable fault point based on the approximate location of the cable fault point determined by the host of the cable fault tester. For buried cables with unknown direction, a pathfinder shall be used to determine the underground direction of the cable. The basic method of power cable fault test is to apply high-voltage pulse to the fault power cable to produce breakdown at the cable fault point. When the cable fault breakdown point discharges, it generates electromagnetic wave and sound at the same time. Dear customers: Hello, our company is a high-quality development group with strong technical force, providing users with high-quality products, complete solutions and superior technical services. The main products are street lamp cable fault tester, underground pipeline detector, cable identification instrument, etc. The enterprise adheres to the tenet of building a business in good faith, keeping the business with quality and developing the business with enterprising. It continues to climb new peaks with a firmer pace and make contributions to the national automation industry. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
Instructions for Use of Cable Fault Tester
Instructions for Use of Cable Fault Tester
When using the cable fault tester, we should first look at some simple waveform diagrams to analyze different cable faults, and then find out the fault points through the corresponding methods. The following is our simple analysis and description. 1. Test the low resistance grounding, short circuit and open circuit faults of the cable with the low voltage pulse method. A. no other auxiliary equipment is needed at this time. A clip wire is directly connected to the input and output interface of the cable fault location host. Clamp the red clamp of the clamp wire on the faulty phase core wire of the faulty cable, and the Black clamp on the sheath ground wire of the cable. B. Start the power switch of the instrument, the screen saver picture will appear on the screen, and click to enter the interface automatically. At this time, the default state of the instrument is "low voltage pulse method". The use method shall be selected according to the type and length of the tested cable on site and the fault nature preliminarily judged. When it is set to "low voltage pulse method", wave velocity measurement can also be carried out on this interface, and historical files can be opened to view previous test results. C. After setting the equipment parameters, click the "sampling" button, and the instrument will automatically send out test pulses. This interface will display the (open circuit) full-length waveform of the cable (as shown in Figure 5) or the low resistance grounding (short circuit) fault waveform (as shown in Figure 6). If the waveform is not good, the operator shall adjust the "median" and "amplitude" and observe the collected echo until the operator thinks that the amplitude and position of the echo are suitable for analysis and positioning. Basic information such as instrument parameter setting is also displayed at the bottom of the screen. During operation, pay attention to the operation status at the bottom of the screen. D. Waveform positioning reading distance. It is easy to judge the distance of low-voltage pulse, as long as the cursor is positioned to the starting point of transmitted and reflected waves respectively. E. When "saving", the test results need to be retained or reserved for comparison. The "saving" function in the instrument should be used to save the measured waveform in the instrument database. If the tester thinks it is necessary to save the test results, he can click "save" and operate according to the prompt in the submenu. 2. The high resistance leakage fault (including high resistance flashover fault) of the cable is tested by the impact high voltage flashover method. The instrument can test the high resistance leakage fault of the cable by the impact high voltage flashover method. Impulse high voltage flashover method is a popular traditional detection method in China. Many users are used to this method. The external circuit is relatively simple, but the waveform analysis is more difficult. Only on the basis of a large number of tests and some experience can we master it skillfully, but it is still an effective test method. Connect the current sampler attached to the instrument with the host with the signal wire and place it next to the grounding wire between the cable and the high-voltage equipment. As long as the output voltage of the impulse high voltage generator is high enough, the fault point will be broken down under the impulse of this impulse high voltage, and the radio wave reflection will be generated in the cable. The current sampler transmits the induced reflected wave obtained from the current signal on the ground wire through magnetic coupling to the cable fault location host for a / D sampling and data processing, and displays the collected waveform on the screen for fault distance analysis. After the cable type and sampling frequency are determined, you can click the "sampling" button to wait for sampling. Once the high-voltage generator has impulse high-voltage flashover, the instrument will automatically carry out data acquisition and waveform display. The red waveform at the top of the screen is the waveform after local amplification, and the blue waveform at the bottom is the full picture of the test waveform. When the ideal waveform is collected, the "waveform scaling" and displacement and moving cursor can be operated to calibrate the fault distance. The operation method is consistent with the low-voltage pulse method. 3. Wave velocity measurement cables produced by different manufacturers, although the models are the same, the differences in process and medium formula will lead to the differences in radio wave propagation velocity. If the average wave propagation speed given by the instrument is directly used, it will cause a certain test error. In order to test the fault distance more accurately, it is often necessary to recheck (test) the radio wave propagation speed of the cable.
What Are the Places Where High Voltage Power Cables Are Most Prone to Failure
What Are the Places Where High Voltage Power Cables Are Most Prone to Failure
We all know that the cable needs to pass the test when it is officially put into the mall. However, the functions and methods of different cable tests are also different. The test method of high-voltage power cable is flicker method. Flicker method includes impulse flash and direct flash. Impulse flash method is also the most commonly used test method. Due to the high precision of impulse flash test, its operation is simple, safe and reliable. The equipment of flicker method is composed of two parts. The high-voltage attack equipment is used to generate DC high voltage or impulse high voltage, which will be applied to the faulty high-voltage power cable. The discharge at the fault point will produce a reflected signal. The current pulse meter is used to pick up the fault interval of the reflected signal, measure some faults such as open circuit, short circuit or low resistance. Fault resistance is also the place where faults are most likely to occur. Based on this measurement method. (1) When the resistance at the fault point is immeasurable, the open circuit fault can be quickly found by measuring with low-voltage pulse method. Simple open circuit faults are not often seen. Open circuit faults are phase to ground or phase to phase high resistance faults, and phase to phase or phase to phase low resistance faults exist together. (2) When the resistance of the defect point is greater than zero and less than 150 kiloohm, the cause of the low resistance problem can be found at will by measuring with the low-voltage pulse method. (3) When the resistance at the fault point is equal to zero, the defect of measuring short circuit by low-voltage pulse method can be found, but this problem is rarely encountered. (4) Flashover defects can be measured by direct flashover method. This problem is usually caused by questionable joints. When the resistance of the fault point is greater than 150 kiloohm, the value changes greatly, so it is very uncertain during measurement. The measured interval is the interval from the fault point to the cable test end; Otherwise, it is the interval from the fault point to the opposite end of the cable test. (5) With the progress of high-voltage power cable fault test skills, different methods should be used for different power cables. We should constantly improve skills and equipment. This allows the safe use of high-voltage cable power for a long time.
Design Features of Cable Fault Locator
Design Features of Cable Fault Locator
Cable fault locator is a set of comprehensive cable fault detection instrument. It can test the faults such as high resistance flashover fault, high and low resistance grounding, short circuit, cable disconnection and poor contact. The cable fault locator is equipped with an acoustic pointing instrument, which can be used to accurately determine the accurate position of the fault point. It is especially suitable for testing power cables and communication cables of various models and different levels of voltage. The cable fault locator adopts a variety of detection methods and applies the achievements of contemporary advanced electronic technology. Using computer technology and microelectronics technology, it has the characteristics of high intelligence, complete functions, wide range of use, accurate test, convenient use and so on. It is very important in civil aviation maintenance to detect aircraft cable fault; According to the characteristics of aircraft cable, a method that can effectively test and diagnose it, low voltage pulse method, is proposed, and an aircraft cable defect detection and positioning device is designed by using single chip microcomputer and CPLD technology; The positioning instrument is mainly composed of three parts: signal acquisition circuit, system control circuit and human-computer interaction circuit; At the same time, two sets of product vibration are adopted, which not only ensures the high-speed signal acquisition, but also meets the low-speed processing of the system. It has the characteristics of low cost, portability and dexterity, accurate test and so on; At the same time, in addition to being applied to aircraft cable maintenance, it can also be further applied to short-distance cable testing and defect detection in telecommunications, electric power and other departments. 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 intelligent cable fault tester, underground cable fault tester, street lamp cable fault tester, 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!
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