Pay attention to the suitability of choosing ppe Pay attention to the suitability of choosing ppe .

Pay attention to the suitability of choosing ppe

New Type Plastic Vertical Color Mixer with Good Quality

  • Mixer Type: Powder Mixer

  •                                                                                                                                                                                                                                            

  • Material: Stainless Steel

  •                                                                                                                                                                                                                                            

  • Transport Package: Plywood Case/ Wooden Package

  •                                                                                                                                                                                                                                            

  • Origin: Guangdong China

  •                                

  • Application: Powder, Granules

  •                                                                                                                                                                                                                                            

  • Trademark: SIMI

  •                                                                                                                                                                                                                                            

  • Specification: CE

  •                                                                                                                                                                                                                                            

  • HS Code: 847780000

  •                                                                                                            

 

                                                                   
FEATURES:
Applicable for mixing the plastic color power new and old materia , forage,food and other mixing purposes.
The stainless mixing tank with smooth inside face for easy cleaning.
Rotatable angle up to 360° for easy loading and unloading.
Automatic stopping setting ,0-30 minutes adjustable.
Overload protection device for safe operation.


Model

Capacity(Kg) Power
(Kw)
Voltage
(v)
Rotating speed(r-min) Dimensions(mm) Weight(kg)
RS-50 50 0.75 380 46 800*890*1400 120
RS-100 100 1.1 380 46 1020*1100*1500 147
RS-200 200 2.2 380 46 1250*1200*1800 147

                                                           

LED Bulb

LED Bulb,Edison LED Bulb,LED Globe Bulb

Brand Lighting Factory , http://www.jmledlight.com


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Intelligent community security construction follow-up maintenance questions

The progress of science and technology has promoted the improvement of people's living standards. The construction of intelligent communities has risen in various parts of our country. A series of follow-up questions brought about by large-scale construction have come out one after another. Security electronic products, like Other electronic products, may have problems of one kind or another in daily use: failure of building talks, failure of monitoring equipment, false alarms in perimeters, failure of parking lot readers, and so on. Electronic products inevitably fail. The reporter found during the investigation that the problem of after-sale maintenance of community security products is far greater than the product itself, and it has become a problem in urgent need of attracting multiple parties.

Contractor: Bad doctor

As the first party to communicate with the smart community, the project company is not only the founder of the community security system quality, but also the first gatekeeper to maintain the community security system.

As we all know, many residential developers have taken cell security construction as a major selling point for real estate development. After the house is built, the real estate developer will directly contract the security project of the community to the security engineer. There are two situations in this: a few high-end real estate developers are pursuing the same security system as the real estate. They focus on the brand and quality of the security products. The general real estate only requires a security system, and they do not pay attention to product checks and give them to the security engineer. Responsible, as long as the project does not exceed the budget, everything is up to the security engineer.

In this regard, in the words of Huang Feiyue, a senior engineer and business manager of the Design and Innovation Center of Shenzhen Overseas Chinese Town Real Estate Co., Ltd., he said, “For the additional functions of the product, developers generally do not pay too much attention, as long as they realize the function of the product itself. The meaning of it is all right. At the same time, the owner's requirements for the technical protection facilities are not too high. They are mainly easy to operate and can really facilitate their lives and ensure their safety."

In the investigation, the reporter found that the maintenance problems of security products or systems mainly appeared in ordinary smart communities. It is understood that during the project maintenance period or the system commissioning period, the project owner will cooperate with the property to provide community security system with a certain period of obligation maintenance.

This type of engineering company has its own technical staff and can carry out basic technical maintenance. However, not all product and technical problems can be completely solved. Most of the maintenance of security products and systems do some simple "surgical operations." When it comes to problems that cannot be solved, such as the lack of product accessories, the contractor will look for manufacturers to maintain.

However, the long period of time for manufacturers to maintain the community security system, and the difficulty of maintaining and maintaining the remote sites at high غير مجاز مي باشدts, is not a rash, and vendors generally do not understand. When the newspaper launched a quality survey in 2011 in Nanning, the reporter saw in Jinxiu Jiangnan Community in Jiangnan District that the security products used inside the community were branded goods. However, the reporter learned from the communication with the person in charge of the property management office that the construction of the sub-district was completed in phase 3. The monitoring equipment in the first phase used Samsung's products, and the latter two phases used the monitoring equipment of Jin Sanli. Therefore, after a product failure, contractors in the residential community generally use their own most common maintenance methods to perform simple maintenance. Not only can they fail to fundamentally repair a product or system, but also cause the product to have a higher failure rate and a shorter maintenance cycle. Later, under the strong demand of residential property, product manufacturers came directly to the maintenance to solve the problem.

The reporter learned that there is a certain success rate in the use of simple "surgical operations" by the project companies, but it does not "encourage all diseases," and sometimes even "acute illnesses" are converted into "chronic diseases."

Property side: foreign monks do not mind

Another factor that contributes to the maintenance of the smart community is the property side. As the manager of the community, the property company is not only the user of the intelligent community security system, but also plays a more important role in management and operation.

With the continuous progress of society, smart communities are no doubt more dependent on the unified management of property companies, and gradually become the mainstream.

In the survey, many engineering companies stated that during the installation of the security system, they not only needed to communicate with the developers, but also the property management company gradually joined them and participated in the discussion of the specific requirements for the installation of residential security facilities. Therefore, the property of the smart community undoubtedly dominates the security of the smart community where they are located.

Wang Cheng, project manager of Shenzhen Das Intelligent Co., Ltd., said that the district’s security system is in good management and operation in the later period, and property management plays a dominant role. A mature property management company will attach great importance to the security system. Once a problem arises, they will immediately resolve it, or communicate with the project company in time, so that the system will always maintain a good operation and play its role as a security guard. And often there are many problems with the system, and there is a certain relationship with the property management.

In the survey, the reporter found that the high and low failure rate of security systems in high-grade residential areas and ordinary residential areas has a certain relationship with the application of product brands, but it also depends to a large extent on the importance attached to property maintenance work. The developers of high-end residential districts will often send their own property companies to manage the communities, pay attention to the management quality and the owners' satisfaction, and grasp the security products and system maintenance very solidly. Most of the properties in the ordinary residential areas were later called “foreign monks”. These “foreign monks” did not even understand the basic conditions of the community security system, and the maintenance work was far less solid than the high-end residential properties.

The director of the property management office of a garden district in Shenzhen proposed that the stability of the product would make them troubled. The intercom system installed by the former developer completely collapsed after a few years of use, and the property company had to replace the intercom product in the entire community. The access control and monitoring system was built by the property company in the later period for the convenience of management and meeting the security requirements. The security system in the entire community is like a patch on clothes, and system compatibility is also greatly reduced.

During the investigation by the reporter in Shanghai, the property manager of an apartment in Changning revealed that most of the community's security products were old. After the previous property was “pulled out” by the owners, they came over. For the residential security system, they want to upgrade, but the owners do not cooperate with reluctant to raise funds, the property side also helpless, want to do something but can not do, and finally it does not matter, let it go.

In the course of the investigation, the reporter encountered another situation: In the residential area where the locally famous property is responsible, even if the security products passed the maintenance period, the property will form its own maintenance system for weak systems; and some properties have changed hands. Later, the property did not even know who the security system had failed to find.

Security equipment follow-up maintenance chaos

In an intelligent cell, different cells also have different post-maintenance methods.

In some smart communities, security equipment is directly from the property company directly to the manufacturer to undertake the construction of the project, and the subsequent maintenance is directly responsible by the manufacturer. There is no charge during the warranty period, and maintenance fees will be charged after the warranty period expires. This aspect of the maintenance process is relatively simple, because the direct construction by the manufacturers, the system products match better, the overall system is easy to achieve application standards. Maintenance can also easily reach direct communication between the two parties.

During this year's visit to the smart community at the Xi'an Station of the Quality Survey, Xi'an Jiyuanmei County used the entrance and exit equipment of the Shaanxi Auto Door Industry. According to the person in charge of the Property Management Office of the Community, the purchase of security products in the community is determined by the property company. The selection of the products of Auto, on the one hand, takes into account the quality of the products themselves, taking into account the local brands, regardless of the failure. Or it's easier to repair.

Last year, the Jinxiu Ecological Park in Panyu District of Guangzhou failed to reach an agreement on the project fee for property and security project contracting, resulting in some of the district’s internal security products being unattended for more than three months. Generally speaking, in the smart community, many security projects are issued with a certain amount of quality guarantee funds in respect of project غير مجاز مي باشدt settlement. This part of the funds will not be paid to the project undertaker until the warranty period expires.

If there is no quality problem during the warranty period or there are some minor quality problems, the project undertaker will repair it in time and the settlement will be made after the payment is due. If there are quality problems that have not been solved, this part of the money may refuse to pay.

For the maintenance of the community security system that has passed the warranty period, the maintenance party often charges, and the property is unwilling to independently pay for excessive maintenance غير مجاز مي باشدts. Therefore, the "maintenance period" as a demarcation point, the different attitudes of the property will also have different effects.

After the warranty period of the security equipment expires, because the maintenance period expires, the security system will need to pay for maintenance. In this regard, some communities will continue to find the previous maintenance units, and some will find new maintenance units, usually looking for professional engineering companies or community security equipment manufacturers to repair. In an intelligent community visit in Anhui, the reporter learned from the Wenjin New City that the property had refinanced the professional project maintenance party by signing the fees of the community owners and signed a time-limited contract to ensure the maintenance of the residential security equipment.

For services outside the warranty period, users often cannot find a suitable maintenance point. Many engineering companies have taken a look at this business opportunity and set up a service department to provide paid services to the community. Shanghai Yanhua Intelligent Technology Co., Ltd. established a dedicated security system service company based on this market demand. Users are satisfied with this professional service and are very assured.

After-sales regulations also need to work together

Nowadays security has entered the era of service competition. With the quality of products almost equal, more engineering parties and properties are more optimistic about the later maintenance of products. Shi Youdi, chief engineer of Shanghai Sanyi Building Industry Co., Ltd., said that the current product replacement is fast, and the security equipment is always an electronic product, and there will always be some failures. Compared to the first equipment that is frequently replaced, the community needs more timely repair and maintenance.

However, the after-sales service of the security system is a comprehensive job. The service quality is closely related to the product suppliers, agents and contractors. Any one of the links may cause problems in the after-sales service quality, and thus cannot guarantee the security of the system. run.

Shi Youdi told reporters that due to the current lack of unified management and standardization of the security service products and the service years of various manufacturers, there must be time and quality disputes inside and outside the service, resulting in uneven sales of security equipment. In the future, with the continued development of the security industry, security is still a service competition. Therefore, if you want to improve the system of after-sales service, you need to work together with responsible departments such as the government, manufacturers, and real estate.

Other LED Floodlight

Led Parking Lot Lighting Fixtures,Parking Lot Lighting Fixtures,Parking Lighting

Huerler Lighting Equipment Co., Ltd , http://www.sz-ledlights.com


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Analysis of the Crux of "Four Big" Failure of Chemical Fertilizer Price Limit Policy

In 2004, the state introduced the fertilizer price limit policy six times, but the fertilizer price still rose 15.8% year-on-year. In 2005, the price limit policy was more than last year. However, from the market reaction, the price of fertilizer still rose significantly. Along with the introduction of fertilizer price increase and price limit policies, the fertilizer market has continued to fluctuate. This has also caused the issue of fertilizer prices to receive more attention. In the competition between market behavior and policy leverage, the price limit policy has become more and more “unsatisfactory,” and the vast majority of production companies and farmers who are the main body of supply and demand for fertilizers have not obtained the expected benefits. Enterprises have complained and farmers have complained. So, who actually opened the "Pandora Box" of fertilizer?
In fact, this "Pandora Box" is a mixture of various contradictions. The fluctuations in the prices of fertilizers highlight various contradictions and gradually intensify. In the case of sharp increases in the prices of coal and other energy and raw materials, tight rail capacity, and rising freight rates for roads, how to take into account the interests of producers, operators, and farmers, and control the price of fertilizer at a reasonable level is in front of macro-control departments. The dilemma.
From the perspective of chemical fertilizer production and consumption, the crux of the failure of the fertilizer price limit policy is reflected in the following aspects:
First, the "departmental linkage" required for policy implementation is difficult to operate. Fertilizer is a commodity that has the special property of “grain food”. The regulation of fertilizer prices involves departments of industry and commerce, commodity prices, finance, taxation, railways, supply and marketing, and electric power. The realization of a complete linkage process is a complex system project. The desired results can only be achieved on the basis of maintaining the smoothness of government decrees and unification of departmental operations. Judging from the actual situation, the state's major related regulation and control policies include preferential tariffs for fertilizer manufacturers, preferential tariffs for fertilizers for agriculture, return of value-added tax for urea products, special subsidies for diammonium phosphate, and guarantees for coal, electricity, and oil for fertilizer production. , gas supply, etc. However, no matter which department appears to be out of touch, which policy is not well implemented, it will affect the overall effect of policy control. In addition, there is little experience in adopting “branch linkages” on the issue of chemical fertilizers, and the understanding of the importance of chemical fertilizers varies from department to department. As a result, the actual implementation of the policy has received a lot of resistance and the effectiveness of implementation has been greatly reduced.
Second, "big market flexibility" is difficult to focus on control. China's chemical fertilizer market is also in a gradually improving market economic environment. In the past, the main channel of sales under the planned economic system has ceased to exist. In the past, the agricultural resources department was the main channel for sales of agricultural products, and the agricultural resources department could effectively control the market. At present, the restructuring of agricultural-funded enterprises has greatly weakened the role of the original main channel, and the supervision and regulation of government behavior has become widespread. As a result, operability has deteriorated, and the supervision and inspection of fertilizer prices has become more difficult.
Again, poor information has exacerbated the blindness of farmers' consumption. Farmers, as the main consumers, have inherent blindness in fertilization technology and are not very sensitive to changes in fertilizer prices. Many unscrupulous traders at the grassroots level use farmers to not understand the market information after policy intervention, deliberately rendering the atmosphere of shortage of chemical fertilizers and boosting Fertilizer prices.
Finally, local protectionism disrupts the optimal allocation of markets. On the one hand, the local protection of phosphorus and sulfur resources has exacerbated the strain on national resources. As the price of raw materials rises, the غير مجاز مي باشدt of fertilizer production increases, and the price of fertilizer increases. On the other hand, local governments have implemented the so-called access system explicitly or implicitly to some fertilizers, which has caused some monopoly in the fertilizer market, causing tensions in supply and demand in some regions.
In fact, the positive attitude of the government is not “finding nothing”, at least preventing unordered competition and accumulating many useful experiences in policy formulation. Therefore, if we can more clearly grasp the crux of the policy failure and adopt comprehensive measures to guide the market and treat the symptoms and the root cause, we can achieve the desired goals within a certain period of time. Of course, policies that really play a regulatory role ultimately need to play a role in the market, and completely liberalizing the market is the direction of macro-control. However, due to the special properties of chemical fertilizers, the government obviously can not completely liberalize the market as quickly as other commodities. Therefore, the government's fertilizer policy needs to find a way to adapt to the development of the fertilizer market, and can give full play to the macro-control role of policy, economic, and technical leverage.

   

Double rows embroidery machine

Embroidery Machine,Commercial Embroidery Machine,Computerized Embroidery Machine

HEFENG COMPUTERIZED EMBROIDERY MACHINES LIMITED , http://www.hk-embroiderymachine.com


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Hot Sale Plastic Vertical Color Mixer

  • Mixer Type: Plastic Mixer

  •                                                                                                                                                                                                                                            

  • Application: Granules

  •                                                                                                                                                                                                                                            

  • Layout Type: Verticle

  •                                                                                                                                                                                                                                            

  • Trademark: SIMI1

  •                                                                                                                                                                                                                                            

  • Specification: CE

  •                                                                                                                                                                                                                                            

  • HS Code: 847780000

  •                                

  • Stirring Type: Spiral

  •                                                                                                                                                                                                                                            

  • Application Area: Engineering & Construction

  •                                                                                                                                                                                                                                            

  • Mixing Drum Shape: Disc

  •                                                                                                                                                                                                                                            

  • Transport Package: Plywood Case/ Wooden Package

  •                                                                                                                                                                                                                                            

  • Origin: Guangdong China

  •                                                                                                                                                                                        

 

                                                                    Product Description:

(1) Vertical structure with castor wheels, small size, removing easily;
(2) Vertical reducer motor adopted ensures low noise and long operation hours;
(3) Fast complete mixing, low energy consumption and high productivity;
(4) Pail cover and bottom parts and compress formed precisely matched and durable;
(5) Mixing timer able to set within 0~30 minutes;
(6) Stainless steel paddle with scientific structure, able to mix raw material completely; Minimize load, save time and electricity; Made of premium stainless steel, high strength and easy to clean.

Model Capacity(Kg) Power(Kw) Rotating Speed Dimensions(mm)
SS-50 50 1.5 62 830*790*960
SS-100 100 3 62 960*860*1180
SS-150 150 4 62 1170*890*1360
SS-200 200 5.5 62 1190*1120*1430

                                                           

Disproportionated Rosin

Dingnan Songyuan Chemical Co., Ltd. , http://www.jxresin.com


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Low Sound Plastic Drying Color Mixer

                            Model NO.: SDM-200

                       

   

                            Layout Type: Verticle

                       

   

                            Mixing Drum Shape: Drum

                       

   

                            Additional Capabilities: Drying

                       

   

                            Operating type: Continuous Operating

                       

   

                            Condition: New

                       

   

                            Trademark: SINCERE

                       

   

                            Transport Package: Wooden Box

                       

   

                            Specification: 1700*1300*1700

                       

   

                            Origin: China

                       

   

                            HS Code: 8419399090

                       

 

                    1. This machine generates heat caused by high-speed spinning fiction to release the water contained in the

raw materia so as to get an efficient drying and uniform color blending. 
                 
2. Integrative control of the operation temperature and time.
               
3. Double-layered stainless container with thermal insulation materia applied in the intermediate.
               
4. Overloading protection device for safe operation.       


Low Sound Plastic Drying Color Mixer

Model           
Capacity (kg) Power (Kw) Rotating Speed                  Dimensions                            (MM)
SDM-50 50 7.5 480 11760*830*1350
SDM-100 100 11 480 1340*98045*1520
SDM-200 200 15 480 1700*1300*1700

                           

Compressor For Saden

Sanden 508 Compressor,508 Compressor for Cars,Pv8 Sanden 508 Compressor

Kasen Auto Air Condition Parts Co., Ltd. , http://www.gdclutches.com


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Why video capture card is essential in the monitoring system

A capture card, also known as a video capture card, uses it to capture digitized video information, store it, and play it out. Many video capture cards can acquire audio while capturing video information, allowing the audio and video sections to be simultaneously saved and synchronized when digitized.

Video capture card, "VideoCaptureCard", its function IS to capture the video signal to the computer, save it as a data file on the hard disk. It is an indispensable hardware device for video processing. Through it, we can transfer the video signal taken by the camera from the camera tape to the computer, and use the relevant video editing software to perform post-editing on the digitized video signal. Processing, such as cutting pictures, adding filters, subtitles and sound effects, setting transition effects, and adding various video effects, etc., and finally converting the edited video signals into standard VCD, DVD, and online streaming media formats, etc. Spread from the interface of the video signal source and the acquisition card, video capture cards are divided into two categories: one is an analog capture card, and the other is a digital capture card.

The analog capture card captures the analog video signal into the PC through the AV or S terminal, and converts the analog signal into a digital signal. The video signal source can be from analog cameras, television signals, analog video recorders, and the like.

Digital acquisition card through the IEEE1394 digital interface, in the form of digital to digital, digital video signal losslessly collected to the PC, the video signal source mainly from the DV (digital video camera) and other digital devices.

An important difference between the analog capture card and the digital capture card is that using a digital capture card, the video signal is not lost during the capture process, and the same effect as the original video source can be ensured. However, if the analog capture card is used, the video signal will have a certain degree of Loss. Someone once made an analogy analogously: analog capture is similar to using video recorders to turn video tapes. Ribbed subbands are always inferior to master tapes. If subbands are used for ripping, the effect will be even worse. Digital capture is like using a computer to copy. Like data files, no matter how many times you copy, the copied files are exactly the same as the original files, and there is no difference. Two-in-one capture card, refers to the digital analog capture card, AV + DV capture card. Digital input and output, analog interface input (DV/AV/S-video), full interface card.

The acquisition card is also called a video capture card. According to its use, it can be divided into broadcast video capture cards, professional video capture cards and civil video capture cards. The difference between them is mainly that the collected image indicators are different. The highest capture resolution of a broadcast video capture card is generally 768x576 (root mean square) PAL, or 720x576 (CCIR-601) PAL 25 frames per second, or 640X480/720X480NTSC system 30 frames per second minimum compression ratio is generally within 4:1. This type of product is characterized by high resolution of the captured image and high video signal to noise ratio. The disadvantage is that the video file is huge, and the data amount per minute is at least 200 MB. Broadcast-level analog signal acquisition cards have component input/output interfaces for connecting to BetaCam cameras/recorders. These devices are the highest-end video capture cards for TV stations to produce programs. The level of professional-grade video capture card is slightly lower than that of broadcast-grade video capture card. The resolution is the same, but the compression ratio is slightly larger. The minimum compression ratio is generally within 6:1, and the input/output interface is AV. Composite terminals and S-terminals, these products are suitable for advertising companies, multimedia companies to produce programs and multimedia software. The dynamic resolution of the civilian-level video capture card is generally 384X288 maximum, PAL 25 frames per second. In addition, there is a special type of video capture card that is special. This is the VCD production card. It should be regarded as a professional grade in terms of uغير مجاز مي باشدe. In terms of image indicators, he can only count as a civilian-level product.

Since the LED display is a special display medium, it cannot directly accept computer data and needs a series of transformations.

The function of the capture card is to collect the display data of a high-speed computer (or multimedia display card), convert it, and down-convert it to the main controller. When no video tape, VCD or other video images need to be played, the capture card can be directly used. Connected to a computer display card.

On the computer, the video capture card can receive the analog video signal from the video input. The signal is collected, quantized into a digital signal, and then compressed into a digital video. Most video cards have the function of hardware compression. When the video signal is collected, the video signal is first compressed on the card, and then the compressed video data is sent to the host through the PCI interface. The general PC video capture card uses the intra-frame compression algorithm to store the digitized video as an AVI file. Some high-end video capture cards can also directly compress the collected digital video data into MPEG-1 format files.

Since the analog video input can provide an uninterrupted source of information, the video capture card captures each frame of the video in the analog video sequence and passes the data to the PC system before acquiring the next frame of the image. Therefore, the key to achieving real-time acquisition is the processing time required for each frame. If the processing time of each frame of the video image exceeds the interval between two adjacent frames, data loss occurs, ie, a frame dropping phenomenon. The acquisition card first compresses the acquired video sequence and then stores it in the hard disk, which means that the acquisition and compression of the video sequence are completed together, eliminating the inconvenience of performing compression processing again. Different grades of acquisition cards have different quality acquisition and compression performance.

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Reactor explosion-proof pressure transmitter installation precautions

Because explosion-proof pressure transmitters have the characteristics of reliable operation, easy installation and use, high performance-to-price ratio, stable performance, and high explosion-proof rating, it is said that today's explosion-proof pressure transmitters are used in many industrial fields. Next, let's take a look at the working principle and installation precautions of the explosion-proof pressure transmitter.

First, the working principle of explosion-proof pressure transmitter

The pressure of the medium to be measured is transmitted to the explosion-proof transmitter through the connecting section. The measuring head is a component that can change the capacitance. Due to the effect of pressure, the capacitance of the measuring head changes with the change of pressure. The change of the measuring head output capacitance is transmitted to the oscillator of the oscillating plate. The oscillator changes the oscillation frequency according to the changed capacitance. The oscillating frequency signal undergoes an integrated operation amplification and detects the output half wave signal with a small oscillation frequency. The signal is then sent to Smart microprocessors.

Second, explosion-proof pressure transmitter installation precautions

1, explosion-proof transmitter, must meet the explosion-proof regulations during installation.

2. The measured medium is not allowed to freeze, otherwise it will damage the sensing element isolation diaphragm, resulting in damage to the transmitter.

3, should be installed in the temperature gradient and humidity change, no shock and vibration.

The above content is the working principle and installation precautions of the explosion-proof pressure transmitter. Today's pressure transmitters can be divided into: ordinary pressure transmitters, remote pressure transmitters, explosion-proof pressure transmitters, etc. In the use of reactors, explosion-proof pressure transmitters with a higher explosion-proof rating are required for the safety of work.

Escalator Step Demarcation

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Intelligent community building intercom common fault solution

Community building intercom system has been to every family, there are networking systems, video systems, intercom systems, etc., a wide range of systems, problems encountered by contractors during the installation process is varied. Based on years of field experience, the author summarizes the most common types of problems. Each type of problem has been analyzed in detail and it is hoped that they will help the engineering company.

One, Sanmenxia site

Symptoms: Directly press the color vision system, 12 floors of 6 floors, no color on the 6th floor.

Exclusion process: First call the Sanmenxia customer to check the line, the other manager also let the construction workers to check, and the construction workers have been reflecting that there is no problem. Our engineers telephone guidance again: the six did not change the color of the extension to the fifth floor, the result will have color, indicating extension hosts have no problem, the problem is on the line, so to emphasize focus on examination of the fifth floor line again. However, construction workers are not willing to take responsibility for the other party's manager to call us and strongly urge the factory to send engineers to the site for inspection. After the engineer went to find: at the fifth floor extension extension, there are two 18-volt power lines. One of the multi-core conductors was stripped of more than a dozen copper wires by the constructor. Originally, the cross-sectional area of ​​0.5 wires had 28 copper wires. There are more than a dozen left, resulting in a serious drop in voltage, which has never affected color.

Solution: Reconnect the partially stripped 18V power cable.

Lessons learned: It is important that the responsibility of the construction wiring staff and the rigorous work attitude be important. For individual construction workers who do not have a sense of responsibility, a small mistake can lead to serious consequences.

II. Xinyang Garden District

Symptoms: Coded color vision system, distortion of the extension image and excessive color reproduction.

Solution: Add a 75 ohm matching resistor to the video mainline.

Analysis Principle: building system extension of each video signal is connected in parallel with a main line video overlay, so that the video signal is stronger, so the image appears distorted image extension, the phenomenon of strong color. Add a 75 ohm resistor to ground on the video main line to weaken part of the video signal and restore normal images.

III. Scene of Jiayuan Community, Longcheng Town, Xinyang City

Symptoms: Encoded black and white video system, one of the extensions to monitor the entrance host image when there is a serious moire.

Solution: Replace the extension video cable.

Principle analysis: The video line produced by the user has a poor production process. It is a non-standard video cable. The copper core of the video cable is not wrapped in the middle position and belongs to the eccentric core, causing problems in the extension video.

Lessons learned: The user can not only pursue low prices when purchasing wires, but when the price is low to a certain extent, it is necessary to strictly inspect the quality of the wires. There are copper clad aluminum, copper clad steel, non-standard, doping and other methods. It is recommended to use the wires of regular manufacturers. Hong Kong TPV has a wire and cable factory in Beijing and its quality is relatively reliable.

IV. The Weihe River Garden

Symptoms: Directly press the visual system, the door host has noise during standby.

Solution: Connect the ground of the 20V power supply to the ground with a wire. It is connected to the negative electrode of 20 volts on either the main housing or the main door. If the gate is not grounded well, you can pull the 20-volt negative electrode directly onto the earth with a wire, and use a steel bar to nail it into the ground about 1 meter, and spill salt water around.

Principle analysis: The power supply grounding of the community is not good, causing the interference signal to not be directly introduced into the earth, but amplified by the host amplifier.

V. Xinxiang Bo Yuanlong Garden Scene

Symptom: Coded visual swipe system, electronically controlled lock cannot be opened Solution: Reconnect 12V power cable Principle analysis: Workers disconnect the 12V power cord copper wire when wiring. Because the unlocking current is very large, if the 12V power cord is stripped, the 12V power cord is very thin, and the current and voltage are insufficient to unlock.

VI. Jiaozuo City Liberated Area Education Bureau

Symptom: Encoded black-and-white video system, 16-story, one-story, two-story, image ghosting and the lower the floor, the more serious solutions: (1) Building isolator.

(2) at the seventh floor of the video cable becomes disconnected, eight or more re-extension band was pulled from the video line the host, the host to add video video output isolators, so that the video signal is divided two-way, one video Line 1-7 layers, another video line 8-16 layers.

(3) Or do not pull the video line, then the video signal of more than seven layers should be output from the video isolators of the seventh layer.

Principle Analysis: Due to the video signal transfer point needs, the higher the floor, the video signal is down the more serious reflection appeared ghosting, so you must use the above method to solve high-level video problems.

7. Changchun European Garden Site

Symptoms: Press black and white visual system directly, there is no image in the entire unit Solution: Bad camera, replace the camera.

Principle analysis: The video cable is shorted with the 4th line to burn out the camera. Because there is 12V on the 4th line, the video circuit of the camera will be burned out if it is short circuited with the video line. In order to prevent this situation from happening again, our factory now has an isolator for the camera video output to prevent such incidents from happening.

Eight, Zhengzhou West Development Zone Wisdom Garden

Symptoms: Directly encoded black and white visual system, visual extension images have moire interference.

Solution: Add a 4700uf/25V capacitor filter at the input of each layer of the video isolator 18V.

Principle analysis: Due to clutter on the site supply voltage, 18V output to each floor isolator requires line filtering to filter out clutter.

9. Zhengzhou Putian Field

Symptom: mixed coding system, the call-through occurs howling phenomenon, sound broadcasting station Solution: In the "T" line-to-ground plus most distal 1UF capacitor filter, re-soldering microphone, sound can remove the broadcast, Xiao Called balance, potentiometer to miss the critical value, that is transferred back to a little when it is not howling.

Principle Analysis: This area away from the television tower too close, if the wiring is unreasonable, it will easily receive the broadcast sound, so the "T" line on the most remote consider the wave, change the input impedance of the amplifier. Whistling If you do not miss the critical value, it may happen that this extension does not whine, and another extension whine, because the length of the line is different.

X. Zhengzhou Shangdu International Apartment Site

Symptom: Code 28 intercom network system on each floor of 28, if you call the first room number and immediately hang up and then call the second room number, and still the first room number is ringing.

Solution: Connect a 1K resistor to ground on the “V” line. The 1K resistor is added to discharge the "V" line. Therefore, the line of the system "V", "T" and "G" is too long. When calling, the "V" line will have a voltage of 5V, and immediately call the second user at this time. The electricity of the "V" line has not yet been discharged, so it is still the first ringing.

Analysis Principle: special case because the cell, each cell has 16 layers, each with several households, a user unit 700 to the extension line so many wires, resulting in a line voltage V not immediately bleed completely, so that the host software! Misjudgment.

Eleventh, Henan Province Inspection House Family House Community Site

Symptoms: Encoded intercom system, the entire unit host to the extension to send a small voice.

Solution: The host microphone hole was blocked by a bug, cleared it, and returned to normal.

Principle analysis: The diameter of the microphone hole on the main body casing is only 1 mm, and any foreign matter blocking the small hole will weaken the sound transmitted to the microphone.

Twelve, * Brigade Family Court

Symptoms: Encoded intercom system, mains howling, volume potentiometer adjustment can not be resolved.

Solution: After the host is turned on, it is found that there is a dead moth in the circuit board, causing a short circuit.

Principle analysis: The moth drills into the host, causing short circuiting of the electronic components on the circuit board.

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Passenger Elevator,Passenger Lift,Cargo lift

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March 12 Wuxi stainless steel market price summary

Lianzhong 202/NO.1 flat plate 4 5 6 8 10 March 12 21000 21200 22000 21400 21400 March 11 21000 21200 22000 21400 21400 March 10 21000 21200 22000 21400 21400 March 7 21000 21200 22000 21400 21400 March 6th 21000 21200 22000 21400 21400 March 5 21000 21200 22000 21400 21400 March 4 21000 21200 22000 21400 21400 March 3 21000 21200 22000 21400 21400 TISCO 321/2B flat 0.6 (dead) 0.7 (dead) 0.8 ( Lack of) 1 1.2 1.5 2 March 12 47000 46500 45500 41000 41000 41000 41000 March 11th 47000 46500 45500 41000 41000 41000 41000 March 10th 47000 46500 45500 41000 41000 41000 41000 March 7th 47000 46500 45500 41000 41000 41000 41000 March 6 47000 46500 45500 41000 41000 41000 41000 March 5th 47000 46500 45500 41000 41000 41000 41000 March 4th 47000 46500 45500 41000 41000 41000 41000 March 3 47000 46500 45500 41000 41000 41000 41000 Zhangpu 316L/2B Tablet 0.6 (absence) 0.7 0.8 1 1.5 2 March 12 59500 59000 59000 58000 57500 57500 March 11 59500 59000 59000 58000 57500 57500 March 10 59500 59000 59000 58000 57500 57500 March 7 59500 59000 590 00 58000 57500 57500 March 6th 59500 59000 59000 58000 57500 57500 March 5th 59500 59000 59000 58000 57500 57500 March 4th 59500 59000 59000 58000 57500 57500 March 3rd 59500 59000 59000 58000 57500 57500 Qingpu 409L/2B Coil 0.4 (dead) 0.5 (dead) 0.6 (dead) 0.7 (deficient) 0.8 March 12th 14200 14000 13500 13000 13000 March 11 14200 14000 13500 13000 13000 March 10 14200 14000 13500 13000 13000 March 7th 14200 14000 13500 13000 13000 March 6 14200 14000 13500 13000 13000 March 5 14200 14000 13500 13000 13000 March 4 14200 14000 13500 13000 13000 March 3 13900 13800 13300 12800 12800 Qingpu 409L/2B Coil 0.9 1 1.2 1.5 2 12200 11800 11800 11800 11800 12200 11800 11800 11800 11800 12200 11800 11800 11800 11800 12200 11800 11800 11800 11800 12200 11800 11800 11800 11800 12200 11800 11800 11800 11800 12200 11800 11800 11800 11800 12000 11600 11600 11600 11600 Qingpu 409L/2B Coil Board 0.4 (Absent) 0.5 (dead) 0.6 (dead) 0.7 (deficient) 0.8 March 12th 14200 14000 13500 13000 13000 March 11th 14200 14000 13500 13000 13000 March 10 14200 14000 13500 13000 13000 March 7 14200 14000 13500 13000 13000 March 6 14200 14000 13500 13000 13000 March 5 14200 14000 13500 13000 13000 March 4 14200 14000 13500 13000 13000 March 3 13900 13800 13300 12800 12800 Qingpu 409L/2B Coil 0.9 1 1.2 1.5 2 March 12 12200 11800 11800 11800 11800 March 11 12200 11800 11800 11800 11800 March 10 12200 11800 11800 11800 11800 March 7 12200 11800 11800 11800 11800 March 6 12200 11800 11800 11800 11800 March 5 12200 11800 11800 11800 11800 March 4 12200 11800 11800 11800 11800 March 3 12000 11600 11600 11600 11600 Krupp 430/BA coil 0.3 (absence) 0.4 0.5 0.6 0.7 March 12th 19000 17700 16500 15800 15400 March 11th 19000 17700 16500 15800 15400 March 10th 19000 17700 16500 15800 15400 March 7th 19000 17700 16500 15800 15400 March 6th 19000 17700 16500 15800 15400 3 On the 5th of the month 19000 17700 16500 15800 15400 March 4 19000 17700 16500 15800 15400 March 3 18700 17400 16200 15600 15200 Krupp 430/BA coil 0.8 0.9 1 1.2 1.5 2 March 12 15400 15000 15000 1 4800 14500 14200 March 11 15400 15000 15000 14800 14500 14200 March 10 15400 15000 15000 14800 14500 14200 March 7 15400 15000 15000 14800 14500 14200 March 6 15400 15000 15000 14800 14500 14200 March 5 15400 15000 15000 14800 14500 14200 March 4 15400 15000 15000 14800 14500 14200 March 3 15100 14800 14700 14500 14200 14000 TISCO 430/2B coil 0.4 (dead) 0.5 0.6 0.7 0.8 March 12 16000 14000 13600 13600 12800 March 11 Day 16000 14000 13600 13600 12800 March 10th 16000 14000 13600 13600 12800 March 7th 16000 14000 13600 13600 12800 March 6th 16000 14000 13600 13600 12800 March 5th 16000 14000 13600 13600 12800 March 4th 16000 14000 13600 13600 12800 March 3 15800 13800 13400 13400 12600 TISCO 430/2B coil board 0.9 1 1.2 (absent) 1.5 2 March 12 12800 12800 13000 12600 12600 March 11 12800 12800 13000 12600 12600 March 10 12800 12800 13000 12600 12600 March 7800 12800 12800 13000 12600 12600 March 6 12800 12800 13000 12600 12600 March 5 12800 12800 13000 12600 12600 March 4 12800 12800 13000 12600 12600 March 3 12600 1 2600 12600 12400 12400 Baoxin 430/2B tablet 0.4 0.5 0.6 0.7 0.8 March 12 14500 12900 12800 12800 12400 March 11 14500 12900 12800 12800 12400 March 10 14500 12900 12800 12800 12400 March 7 14500 12900 12800 12800 12400 March 6 14400 12900 12800 12800 12400 March 5 14500 12900 12800 12800 12400 March 4 14500 12900 12800 12800 12400 March 3 14500 12900 12800 12800 12400 Baoxin 430/2B flat 0.9 1 1.2 1.5 2 March 12th 12000 12000 11800 11800 11800 March 11th 12000 12000 11800 11800 11800 March 10th 12000 12000 11800 11800 11800 March 7th 12000 12000 11800 11800 11800 March 6th 12000 12000 11800 11800 11800 March 5th 12000 12000 11800 11800 11800 March 4 12000 12000 11800 11800 11800 March 3 12000 12000 11800 11800 11800 Baoxin 430/2B coil 0.4 (dead) 0.5 0.6 0.7 0.8 March 12 16400 14200 13900 13500 13400 March 11 16400 14200 13900 13500 13400 March 10 16400 14200 13900 13500 13400 March 7th 16400 14200 13900 13500 13400 March 6th 16400 14200 13900 13500 13400 March 5th 16400 14200 13900 13500 13400 March 4th 16400 142 00 13900 13500 13400 March 3 16400 14200 13900 13500 13400 Baoxin 430/2B Coil 0.9 1 1.2 1.5 2 March 12 13000 13000 13000 13000 13000 March 11 13000 13000 13000 13000 13000 March 10 13000 13000 13000 13000 13000 March 7 13000 13000 13000 13000 13000 March 6 13000 13000 13000 13000 13000 March 5 13000 13000 13000 13000 13000 March 4 13000 13000 13000 13000 13000 March 3 13000 13000 13000 13000 13000

 

 

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Daily monitoring of the necessary tools for the access control system

The tools for daily monitoring of the access control system are very simple. A multimeter, a large, small, cross, a total of 4 screwdrivers, a diagonal pliers, a roll of tape, a soldering iron, and soldering are the diagnostics above the hardware. If the software above diagnostics, if you are a manufacturer, it will have a communication test program, at least with a U disk, recommended 2G. Prepare software, instructions, test procedures, and working software. If you have a condition to buy a notebook with a serial port or a USB-to-serial converter plus a notebook. Here's a brief description of common methods and necessary tools for fault detection of access control systems:

Standing Tools Multimeter

Uses: Measure the voltage is normal, whether the circuit is short circuit and open circuit.

Prepare a set of available backup devices:

485 and TCP communication controllers each set of ID and IC card reader each one ID card IC card card several electric locks a 485 converter a standard power supply (12V5A above)

Uses: Replace test
Small screwdriver

Uses: Remove the wiring of the terminal, it is too big to disassemble.

Strong Phillips screwdriver
Purpose: To remove controller board chassis power, etc.

laptop:

Requirements with a serial port or with a USB serial converter, with a network port.

Purpose: To exclude the use of the test, to eliminate the failure of the customer's computer itself or the operating system.

Network hub HUB: (two or three straight lines with crystal heads)

Set up a small LAN environment to test whether the TCP controller has communication problems.

Test pencil:

Does the computer and controller chassis leak current?

AC live position.

120 ohm termination resistor:

Some special occasions improve the anti-jamming ability of 485 lines.

Take just a few, not used.

Intercom:

On some different floors, two people are required to observe the breakdown and communication. Non-essential, you can use mobile phones instead.

Common method software test method:

Test method:

First start the management software, enter the total console to select the faulty door, and then click on the detection, software operation information will prompt the relevant fault, then you can deal with related faults. For example: the software sets some advanced settings category. For example, the user does not know the situation Under the setting of multi-card opening, which led to the real-time monitoring method can not open the card:

Select the door in the general console for real-time monitoring.

The real-time monitoring corresponds to the corresponding swipe indicator to facilitate the detection of the failure of opening the door by swiping the card.

The corresponding communication indicator helps to find communication failures.

Search .net method:

Selecting the controller in the basic settings helps to find the communication failure of the TCP/IP controller

Indicator judgment method:

CPU indicator:

When normal, the CPU indicator flashes. If it is on or off, there is a possibility that the power supply is incorrect, or the controller chip has been damaged and crashed.

CARD indicator method:

As long as any card reader of the controller swipes in and the card number is transmitted, the indicator will flash. If the indicator light does not respond after swiping, it may be:

The line from the card reader to the controller is broken, or the data line is connected incorrectly.

The reader's output format is incorrect.

The card reader is broken.

The controller's reader input is burned.

ERR fault indicator:

Normal is not lit. If it is flashing or lit, it may be:

The controller has a chip burned and the memory needs to be formatted. Or other faults, please communicate with factory technicians and contact.

Communication indicator:

485 controller:

Rx lamp indicates that the controller received the signal (including normal signal and interference signal)

The Tx lamp indicates that the controller is signaling.

TCP controller:

The Rx (Link) light indicates that the wiring is generally OK. (Some special problems that may already exist may not have been detected, but they are basically normal.)

A flashing Tx light indicates that the communication is in progress.

Replacement method:

Device replacement method:

Replace the suspected faulty equipment with equipment that you believe is good (usually tested, frequently used equipment) and see if the symptoms disappear.

If it disappears, the equipment may be broken. However, it cannot be completely determined, because if it is caused by a certain environment or factor, it may not be displayed immediately, or it will also harm the new device after a certain period of time.

If the equipment in question is changed, there will be no problem if it is detected alone. This may be a problem of the environment such as wiring. We should actively look for the source of the problem. Do not change it and think that everything will be fine.

Laptop replacement method:

You can determine whether there is a problem with the client's computer or operating system, or if it is not set correctly.

Exclude contrast method:

If there are multiple devices and only one device has a problem, if it is not the device's problem, there must be something external and different that has caused this particularity.

If multiple devices have the same problem, it is unlikely that all devices will be broken. There must be one and the same factor that causes all devices to have the same fault characteristics. Finding this common point is the key to finding the source of the fault.

If you suspect a problem with a device, first evacuate all of its external devices to see if there are any problems. If there are no problems, it must be an external device that caused this failure. Then load each external device one by one and load a test. , to see what is loading caused this failure. If there are problems with the evacuation of all external devices, it may be related to the device itself itself, such as power supply.

If you have a system with multiple devices and you are concerned about the cause of the failure due to mutual influence, consider evacuating all devices in a dichotomy, which helps to speed up troubleshooting. For example, if a system has 8 controllers, it may be considered to disconnect the next 4 and then disconnect the remaining 4 units.

Note

If external devices other than electric locks (for example, three-way gate elevators, automatic elevator doors, etc.) are connected, please communicate with our technicians first. It is best to provide detailed instructions for external devices. So that we can give you professional advice.

Swing check valve

Flap Check Valve,Swing Check Valve,Fire Protection Valve

Galaxy Valve Co., Ltd. , http://www.tjgalaxyvalve.com


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