What Is Best Optical Power Meter?

What Is Best Optical Power Meter?

2021-10-21
NOYAFA
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The best optical power meter has been in the market for years. Over the past time, its quality has been strictly controlled by SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED, resulting in great superiority among other products. As for design, it is designed with the innovative concept that caters to the market demands. The quality inspection highly meets the international standards. Its first-class performance is loved by global customers. There is no doubt that it will become popularized in the industry.We make efforts to grow our NOYAFA by international expansion. We have prepared a business plan to set and evaluate our goals before we get started. We move our goods and services to the international market, making sure we package and label them in accordance with regulations in the market we are selling to. Just as important as the quality of best optical power meter is the quality of Customer Service. Our knowledgeable staff ensures every customer is delighted with their order made at Best Cable Tester Supplier in China _ Noyafa.
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How to Use Live Cable Identification Instrument to Identify Power Failure and Live Cable
How to Use Live Cable Identification Instrument to Identify Power Failure and Live Cable
Before we use the instrument.. Let's first understand the functions of the instrument panel buttons and what they are used for? Live cable identifier transmitter 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: turn on the backlight for test after the instrument is turned on. When this button is pressed, the backlight will turn on. When it is pressed again, the backlight will turn 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: the instrument uses liquid crystal display for man-machine dialogue. 7) charging interface: it is used to charge the signal transmitter and the receiver of live cable identification instrument. 1) power switch: it is responsible for turning on and off the power supply. Press the state to turn on, and then press the key to turn it off; 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) Backlight switch: turn on the backlight for test after the instrument is turned on. When this button is pressed, the backlight will turn on. When it is pressed again, the backlight will turn off. 4) Volume adjustment: adjust the sound volume of the speaker according to the demand, and adjust the volume in the order of small - medium - Large - off; 5) Gain adjustment: adjust the system gain according to the demand, the dynamic range is 000-100db, and the default is 60dB after startup; 6) Charging interface: it is used for charging the signal receiver. I believe you have a preliminary understanding of the instrument. Let's explain in detail how to use the live cable identification instrument: 1. Identification of power-off cable 1.1 direct connection conditions â—Ž it must be power-off cable; â—Ž know at least one end of the cable and separate the known end from the system, including disengaging the zero line and ground line; 1.2 signal application â—Ž in this method, the direct connection method is used to apply the signal (as shown in Figure 4); Turn off the power switch of the transmitter, insert the output connecting line into the output line interface of the transmitter, as shown in Figure 4, and connect the wire core with the red clip. Turn on the transmitter power switch and select the frequency: the transmitter has four or two frequencies: low frequency, intermediate frequency, high frequency and RF; After selecting the frequency, select the gear according to the actual situation. The transmitter is divided into high gear, medium gear and low gear. Generally, try to select a relatively low gear to save the power of the battery. After selecting the gear, the instrument automatically performs impedance matching. After matching, the transmitter displays the stable fault impedance of the current system, and the icon starts to rotate. 1.3 signal detection (identification) â—Ž connect the receiving coupling clamp to the receiver with a connecting wire with four core plugs at both ends; â—Ž turn on the power switch of the receiver to make its frequency correspond to the transmitter; â—Ž clamp the red line or cable head of the transmitter straight line with the receiving coupling clamp to reduce the gain so that the signal strength is about 800. Remember the current gain and strength value, and take this value as the reference value; â—Ž at the point to be tested, clamp the exposed cable with coupling pliers and find the cable with strong signal, that is, the cable to be found. 2. Identification of live cable 2.1 coupling conditions the cable must have known exposure points, and both ends of the cable must have grounding points or points associated with the ground (the live cable has been associated with the ground through the zero line); The coupling position shall be as far away from the end as possible; 2.2 one end of the four core aviation line equipped with the coupling signal application instrument is connected with the four core aviation base on the transmitting coupling clamp, and the other end is connected with the transmitter to complete the connection between the transmitting clamp and the transmitter; Put the transmitting coupling clamp on the cable exposure point, which is the signal application point. Note that the coupler should be completely closed; Turn on the power switch, select the frequency and match the impedance of the instrument; 2.3 signal detection (identification) â—Ž connect the receiver and receiver coupling clamp with four core aviation line; â—Ž at the transmitting point, clamp the receiving coupling clamp on the cable to reduce the gain so that the signal strength is about 800. Remember the current gain and strength value, and take this value as the reference value; â—Ž at the point to be measured, clamp the receiving coupling clamp on the exposed cable and find the cable with strong signal, that is, the cable to be found. If the cable is long, the signal will have a certain attenuation. At this time, compare the cable with strong signal.
Cable Tester to Test Your Home Network
Cable Tester to Test Your Home Network
The introduction of cable testerA cable tester is a market expert who looks into a specific product and finds flaws in it. They are usually looking for products that are either faulty or un-performing, so they make sure to find out which product is the most likely to break. Although, their job is not necessarily related to the product itself, but they look for any sort of issues with the basic properties of an item.Tips for cable testerA cable tester is a person who reviews the quality of cables in different locations and makes sure that they meet the standards. They do this by making inspection decisions, often at short deadlines.The most important thing to remember while reviewing cables is that no part of a cable should touch the ground or any of its power sources because doing so can affect the performance and reliability of cables in those places. In addition, when inspecting cables for damage, there should be other requirements as well - for example, according to ISO-IEC 61631-1 (or equivalent) standard, cable manufacturers have to report any kind of deviation from safety standards.How to use cable tester?This page will provide you with information on the best way to use cable testers.In this article we are going to discuss about how to use cable testers and their pros and cons.The specifications of cable testerThe cable tester is a very important part of the electronics system and it's always in high demand. Also, the industry experts are always looking for more information on this subject.The product instructions of cable testerIt is now possible to test cable products, determine the quality of their performances and reviews, without having to physically go inside the box.##Section topic: Movies and television series of the next generationIntroduction: “The new generation” refers to all people born after 1985 and up. The biggest trend in this context is the increase in the number of young viewers who are looking for different kinds of content. This creates a big opportunity for film makers and television producers. For example, recent films such as "Black Panther" have been successful because they capitalized on this trend by making a character who was not like other characters that had appeared before. It seems that there is an opportunity for movie makers to get inspiration from these trends in order to create feature oriented movies. The same applies forThe application of cable testerThe application of a cable tester is a process that an electrician uses to check the wire and cable system in a building or industrial site before the building is occupied.
Specifications for Cable Fault Tester
Specifications for Cable Fault Tester
1. Long test distance: 32km2. Detection blind area: 1m3. Reading resolution: 1m4. Power consumption: 5va5. Service conditions of cable fault detector: ambient temperature 0 ℃ 40 ℃ (limit temperature - 10 ℃ 50 ℃), relative humidity 40 ℃ (20 90)% RH atmospheric pressure (86 106) kpa6. Volume: 225 × one hundred and sixty-five × 125mm38. Weight: 2kg1 traditional cable fault detection method 1.1 measuring resistance bridge method this method has hardly changed for decades. For short circuit fault and low resistance fault, this method is very convenient. The bridge method is based on the principle that when the bridge is balanced, the product of the corresponding bridge arm resistance is equal, and the length of the cable is directly proportional to the resistance. 1.2 low voltage pulse reflection method low voltage pulse method, also known as time domain reflection method (TDR), means that the pulse reflector independently measures the low resistance and open circuit faults of the cable without passing through the high voltage impactor. 1.3 pulse voltage sampling method pulse voltage sampling method, also known as impulse high voltage flashover method, is a test method for measuring high resistance leakage and flashover faults. Firstly, the cable fault is broken down under the DC or pulse high voltage signal, and then the distance is measured by recording the time required for the discharge pulse to go back and forth between the measuring point and the fault point. Pulse voltage method mainly includes DC high voltage flashover (direct flashover method) and impulse high voltage flashover (impulse flashover method). 1.4 traditional method of cable fault location ①acoustic measurement method this method uses the breakdown and discharge sound of the fault point during high voltage impact to accurately locate the fault point. ② Dear customers: Hello, our company is a high-quality development group with strong technical force, providing high-quality products, complete solutions and superior technical services for the majority of users. The main products are high voltage cable fault tester, cable fault locator, intelligent 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!
Operating Steps of Live Cable Identifier
Operating Steps of Live Cable Identifier
1. Connect the transmitting source: the live cable identifier inserts 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 clamps the transmitting caliper a on the identified cable. The arrow on the transmitting caliper a points to the cable terminal. Both ends of the identified cable shall be reliably grounded. For cables that do not operate, the core wires at both ends can also be grounded. 2. Turn on the power switches of the transmitting source and receiver to check the direction: 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 this time, the pointer of the receiver ammeter must deflect to the right, and there is an audible and visual prompt at the same time. If the arrow of the receiving caliper B points to the transmitting source end, there will be no audible and visual prompt, and the pointer of the current meter will deflect to the left. Remember the deflection direction of the receiving caliper gauge. 3. Identification: at the identification point, use the receiving caliper B to identify each cable. 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. On other cables, the pointer of the receiver current meter must deflect to the left without audible and visual alarm. The pointer of the current meter of the receiver deflects to the right, and the audible and visual alarm prompt is the cable to be searched and identified. This test result is unique. That is, no matter how many cables there are in the cable trench, when each cable is identified with the receiving caliper B, only the receiver current meter pointer on one cable (the cable to be found and identified) deflects to the right and gives an audible and visual alarm. 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 underground cable fault tester, cable fault tester, 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!
How to Use Network Cable Tester_ Application Method of Network Cable Tester
How to Use Network Cable Tester_ Application Method of Network Cable Tester
Now cables are used in all aspects of people's production and life, so mastering the operation method of network cable tester is the most basic requirement for cable users. So how to use network cable tester?Application method of computer network cable tester1. Insert the two ends of the network cable above the main and auxiliary survey lines respectively, and you can insert any head at will;2. Then turn on the switch of the line measuring instrument;3. Observe whether the indicator lights of 1-8 on the main and auxiliary line measuring instruments are on, and the order of lights is correct.4. For example, 1 light on the main survey line instrument should be on, and 1 light on the auxiliary survey line instrument should also be on. If the 1 light on the main line measuring instrument is on and the 2 light on the auxiliary line measuring instrument is on, it indicates that there is a problem with the network cable and it can not be used normally;5. Among the eight lights, as long as the lights 1, 2, 3 and 6 are on, the network cable can be used, because the data is transmitted through these four lines, and the other four lines are not used to transmit data.There are two standards for the order of network cables:1: The standard of t568-b is orange white, orange, green white, blue, blue white, green, brown white and brown.2: The standard of t568-a is green white, green, orange white, blue, blue white, orange, brown white and brown.The first standard is generally used.Second, insert the crystal heads at both ends of the network cable into the RJ45 port of the main tester and the remote test end respectively, and turn the switch to "on" (s is slow gear). At this time, the indicator heads of the main tester and the remote test end should flash one by one.Test of direct connection: when testing the direct connection, the indicator lights of the main tester should flash one by one from 1 to 8, and the indicator lights of the remote test end should also flash one by one from 1 to 8. If this is the case, it means that the connectivity of the through line is OK, otherwise it has to be redone.Test of interleaved lines: when testing interleaved lines, the indicator lights of the main tester should also flash one by one from 1 to 8, while the indicator lights at the remote test end should flash one by one in the order of 3, 6, 1, 4, 5, 2, 7 and 8. If so, the connectivity of interleaved lines is OK, otherwise it will have to be redone.If the line sequence at both ends of the network cable is incorrect, the indicator lights of the main tester still flash one by one from 1 to 8, but the indicator lights of the remote test end will flash one by one according to the order of the line numbers connected with the main test end. In other words, the remote test end cannot flash in the order of the above steps.Phenomenon of wire open circuit testWhen one to six wires are open circuit, the indicator lights of the corresponding wire number of the main tester and the remote test end are not on, and other lights can still flash one by one.When 7 or 8 wires are open circuit, the indicator lights at the main tester and remote test end are not on.Phenomenon of wire short circuit testWhen two wires are short circuited, the indicator lights of the main tester will still flash one by one in the order from 1 to 8, while the indicator lights corresponding to the two short circuits at the remote test end will be lit at the same time, and other indicator lights will still flash one by one in the normal order.When three or more wires are short circuited, the indicator lights of the main tester still flash one by one from 1 to 8, while the indicator lights corresponding to all short circuits at the remote test end are not on.
How Much Will It Take for Underground Wire Tracer Materials?
How Much Will It Take for Underground Wire Tracer Materials?
The share of raw material costs in the total costs for underground wire tracer depends on the different materials a producer used in his production. In the manufacturing industry, material cost accounting is a fundamental requirement for achieving success. To be competitive and profitable, manufacturers must understand and control the material cost. In the current economic conditions, many manufacturers have been searching for ways to improve material efficiency, in order to maintain profitability and a competitive advantage via providing maximum profit to customers.Best Cable Tester Supplier in China _ Noyafa is engaged in manufacturing and supplying full ranges of different underground wire tracer. underground wire tracer adopts new environmentally-friendly material. The experiments reveal that underground wire tracer is much more practical, it can be extended to any other kinds of underground wire tracer.Best Cable Tester Supplier in China _ Noyafa ensures our service is as reliable as our products. Check it!· Related Questions:1. How much will it cost for underground wire tracer production?Cost of production is a large issue in the underground wire tracer company. It's a key affecting the earnings and profit. If the company partners care about it, they might consider the profit. When the producers concentrate on this, it's possible they get an aim to decrease it. A whole supply chain is obviously a means for the producers to decrease the prices. This really is a now a tendency in the business, and is a reason behind M&A. ——————— 2. What is the proportion of material cost to total production cost for underground wire tracer?The ratio of raw material costs to total cost of underground wire tracer depends on the different materials used by producers in their production. In manufacturing, material costing is a basic requirement for success. In order to be competitive and profitable, manufacturers must understand and control material costs. In the future economic conditions, many manufacturers are constantly looking for ways to improve material efficiency in order to maintain a surplus and competitive advantage by providing customers with maximum profits.
Best Cable Tester and Reviewer
Best Cable Tester and Reviewer
The introduction of cable testerA cable tester is a device that is used to test the quality of a cable. It can be used when people install their first home network to make sure that they have everything in place and are ready to connect all the devices.When people are setting up their first home network, there is always the fear that they might not have everything in place to connect all their devices efficiently. That's when they need a cable tester like this one.Cable testers come in different shapes and sizes, but this particular one makes it easy for users to test plugs and cables with ease. It also comes with an on/off switch for convenience purposes. There are multiple companies selling these types of products like Amazon or Best Buy, but it’s really important that you go through reviews before buyingTips for cable testerCable testers are the best way to ensure that you have the ideal cable for your TV. However, they come in a wide range of shapes and sizes.This guide contains tips to help you find the right one for your needs.How to use cable tester?As a cable tester, you need to identify if your cable has any problems. Here is a step-by-step guide of how to use a cable tester.If the connection is not strong or there are no picture and sound, troubleshooting starts by using the remote control provided in the package. You should also check if you have a faulty power cord as it may cause intermittent connections.When trying to fix the connection, make sure that you have an HDMI port on your TV and that it is connected with an HDMI cable. If both of these are not present, it causes signal loss and prevents viewing or sound from existing on your TV or speakers.The specifications of cable testerAs the technology is developing, more and more people are beginning to use these cable testers. Cable testers are designed with two screens that show both live video as well as a map of the cable's conductor.The manufacturer offers a three-year warranty on the tester. It also has a wireless remote control for viewing and controlling the program in real time.The product instructions of cable testerIn designing a new product, an engineer must consider many things - the needs of the customer, the needs of the company, and how to make sure they are meeting those needs. All of these factors will determine what instructions will be written for a product. In this section, I'm going to focus on product instructions and what they need to cover.The product instructions are an important part of your customer relationship. They should provide information about what your current customers need and how to use your products in detail. This includes wiring diagrams and other helpful information that can help people use it correctly and effectively.Product instruction should also include warnings about safe use as well as safety concerns about using it improperly could lead to personal injury or deathThe application of cable testerThe cable tester comes in handy during the installation of cables and wires, where it is used to ensure that the cables are safely and securely fixed.The cable tester facilitates the installation process by providing a safe way for users to connect wires without difficulty. It also provides an easy way of testing cables and ensuring that they are working properly before continuing with the installation process. Despite being a rarely used device, it is one of those indispensable tools which can be found in every home or office.The device has a simple design - it has two pieces of metal at either side which serve as terminals that connect to different points on data cables or electrical wires and provide an easy way for users to test if there is any voltage or current flowing through them.
A Guide to Cleaning High Voltage Detector Tester - Do-it-yourself
A Guide to Cleaning High Voltage Detector Tester - Do-it-yourself
A non-contact voltage tester is a safe method to ensure that no current touches the wire. It is lightweight, makes no noise and has a hot wire covered with plastic insulation.If you hear continuous chirping or see a series of flashes, this confirms that the tester has detected voltage. A voltage tester is a simple device that checks whether electric current is flowing through a circuit.A voltage tester is helpful when performing electrical work such as wiring, installing lights or troubleshooting household appliances, as it can warn you of unsafe situations by detecting currents that you might find the hard way. You can also use voltage testers to check that wires have enough voltage to power certain electrical devices or machines. The simplest type is the neon-colored two-wire tester, which measures from zero to 500 volts.If the voltage exceeds 9.6 volts, this means that the battery has become sulphate and can no longer absorb any charge. High voltage detectors that detect AC and DC voltages have a longer service life and the tungsten carbide tip is protected by a plastic cap when not used.If you wish, you can take the test a little further and deactivate the ignition injection in order not to start the engine. This will allow you to crank up the engine, but we suggest that it lasts no longer than 1.5 seconds.When the battery is fully charged, the voltmeter should indicate that it maintains a voltage of 9.6 volts or higher. If your voltmeter shows a voltage between 12.4 and 12.8, this means that your battery is in good condition.A voltage of 12.9 volts is a good indicator that your battery has an excessive voltage. If you have a voltmeter with a voltage of 12.2 volts, you should consider dripping a charge into your battery. In this case, switching on a high beam deprives the surface charge of excessive voltage.The CAT voltage specified on the tester or accessory must match the electrical environment in which you are using it. Be sure to test the absence of voltage before performing any tests that are necessary for PSA. If the absence of the voltage test proves that the circuit is dead, it should be considered as activated.In older homes, do not assume that a wire box is a dead circuit breaker. Your digital multimeter should last long before it breaks or wears out. Testing a lead temperature sensor with a fuse, for example, does not work.The conductor of the circuit board wired into the device must be checked to ensure that the device is on. Place a tip of the probe at the end of the conductor, where the fuse must be checked. If one of the components of a circuit board is switched off, the device should switch off the current by separating one end of each component from its circuit.Some products have remote displays or wireless contactless tools that help you get out of danger by allowing measurements to be made without the activated part making contact. The live-to-dead or live test method requires you to test the functionality of your devices without knowing the voltage source before making measurements. Use this method to ensure that your instrument is working properly before you take any measurements.If you would like to repair cars or electronics and electrical appliances, a multimeter is a handy accessory for your DIY kit. If you do not have it, you can use a voltage detector (instead of a voltmeter) or a continuity tester (instead of an ohmmeter). When used correctly, the multimeter indicates whether the white or black wires in the reverse socket are grounded when the cable enters the box that feeds the socket.Working with the main power supply can be dangerous and you may suffer shock and electrocution if you do not take appropriate precautions. Read and understand your multimeter's manual and the warnings it contains before using it to measure main current and voltage.If you are experiencing faulty wiring or any type of damage, repairs or alterations should be performed by a qualified electrician after further testing or conversion work has been carried out.Once the conversion work is complete and the power supply is restored, perform a few basic tests to make sure the switches and sockets work. If you test a wall socket powered by a wall switch known as a switch socket (a common means for powering a floor lamp, for example), you can use a non-contact voltage detector to check the wall socket is in the position of the wall switch. Use a socket tester on the outlet to search for switches and a non-contact voltage tester to place any kind of electrical load on the circuit.You can add the creation of it to a beautiful piece of it: you can wear it by using a lock, uni-T voltage detector, pen detector, sound light, alarm LED flashlight, cute little pony cupcake packaging that makes children giggle, layer of chevron counting from the innermost layer to the perforation in the outermost layer, bachelor train, 125 specialty, beautiful silverwork, 5 citrus stones in addition to rainbow-pleasing shades.
Possible Causes of Cable Failure
Possible Causes of Cable Failure
With the vigorous promotion of China's power industry, more and more local, underground, overhead and other cables! At the same time, due to long-term erosion, the cable also needs regular maintenance! Today, I will give you a simple analysis of possible cable faults and corresponding maintenance methods. You can have a good understanding. In general, our common cable faults include short circuit to ground, phase to phase short circuit, etc. this fault mainly occurs on buried cables. The main symptoms are normal in sunny days and short circuit in rainy days. So what should I do about this fault? The solution is to recommend the use of cable fault tester produced by formal enterprises. The low-voltage pulse method is adopted. The host plus cable two phases. The host transmits a pulse, and then through the feedback waveform, the fault point can be found accurately and repaired or replaced! 1、 In case of failure, the first-aid repair personnel shall prepare the following materials and tools: 1. One set of cable fault tester and one set of cable identification instrument. 2. The faulty cable shall be the same as the cable, cable head and crimping pipe of the same specification. 3. Two small ropes, two large ropes and four sets of climbing tools. 4. Check two groups of electric pens, safety signs and grounding sealing wires. 5. Lighting tools, communication tools, wire cutting scissors, wire binding, iron wire, saw bow, phase sequence belt and blowtorch. 6. Power generation equipment. 7. Multimeter, insulated megger, anti-aging wire, wire nose, crimping pliers, adhesive tape, sandpaper and round file. 2、 The emergency repair division and process can be carried out in groups at the same time. 1. Cut off the fault point at the first time according to the dispatching command. 2. Inform Baodong maintenance workshop according to the fault conditions. 3. Prepare materials and tools and ship spare transformers. 4. Attention shall be paid to site safety and phase sequence of cable terminal connection during recovery. 3、 Note 1. The copper shielding layer is wound with insulating tape, which is used to prevent the copper shielding layer from being loose and temporarily fixed during the fabrication of cable terminal head. It shall be removed when heat shrinkable stress tube. 2. The electric stress control tube (stress tube for short) is sleeved at the fracture of the shielding layer to disperse the electric field stress (power line) at the fracture and ensure the reliable operation of the cable. 3. Safety protection shall be provided during voltage withstand test. 4. When using lighting lamps near the railway line, pay attention to the direction and angle to avoid disturbing the driving. The requirements shall not be reduced even under poor site working conditions; The division of labor shall be clear, and the preventive measures shall be arranged in detail. A closed fence or fence shall be installed at the test site; And marked stop, high voltage danger! Words and signs; It shall be hung outwards and protective measures shall be sent, especially when the other end of the cable needs to be protected and the communication must be kept open to prevent an emergency. The test equipment and wiring shall meet the requirements and the operation shall be standardized; During the test, attention shall be paid, and the operator shall stand on the insulating pad; At the end of line change or test, disconnect the test power supply, discharge it, and ground the high-voltage part of high-voltage equipment; In the high voltage test, the cable shall be discharged to the ground several times before touching the cable, and shall be short circuited to the ground at the end of each test or at the end of the test.
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