Common problems and solutions of electronic universal testing machine
Faced with the common problems of electronic universal testing machines, it is a headache for users and do not know how to solve them! This is not to blame the user, after all, "the electronic universal testing machine manufacturer only taught us how to operate, but did not teach us how to solve the fault."
Some users will ask: "Why click to start the test always pops up prompting online failure, how to solve it?"
Tell you the reason: online failure indicates that the software failed to successfully connect with the machine.
Solution: The user needs to check whether the serial port line is well connected to the computer and whether the machine is powered on. After ensuring that there is no problem with the connection, click the menu to set the connection and select the connected COM port to connect. If you do not know the connected COM port, you can Select the COM ports one by one for connection until the connection is successful. If you still cannot connect successfully, exit the software, turn off the power of the machine, and then restart the machine and software.
Users often encounter this kind of problem: "The software always pops up after a period of time. The expiration date has expired. Please contact the manufacturer. How can I solve it?"
Reason for booting: Indicates that the software has exceeded its usage period.
Solution: Please contact the manufacturer to obtain the registration code and re-register the software to use it normally.
Sometimes the electronic universal test opportunity is very disobedient: "When you click to go up or down, the running speed of the machine does not match the set speed, and it always runs fast. How to solve it?"
Solution: Please try to remove the user parameter setting-control parameter-speed closed-loop control. If the displacement encoder is not connected or the displacement has not been calibrated, please do not turn on the speed closed-loop control.
Will there be radiation in the long-term use of the high temperature aging test chamber? When it comes to safety and health issues, it is normal for users to have this concern. The high temperature aging test chamber contains no radiation source! The design of the high temperature aging test chamber conforms to the national standard, and there is no obvious The source of radiation, it can be ignored, similar to a refrigerator, I believe that every family has it, so we don't need to worry about the high temperature aging test chamber of radiation.
Basically all walks of life need to use high-temperature aging test boxes, such as: electrical appliances, electronic products, auto parts and their parts and other materials in the high-temperature, low-temperature integrated environment transportation and use adaptability test.
With the widespread use of electronic products, radiation issues have gradually become a topic of concern to us. We believe that radiation can kill cells in the body and have a certain impact on our health. Even some users worry about whether this kind of radiation will appear when buying a high-temperature aging test box, but it is not true.
When we use the high temperature aging test box, we should choose a regular brand, so that the upper and lower limits of the temperature can be set before the test. Once this temperature is exceeded, it will automatically stop and turn on the protection function to avoid the severe impact of the harsh environment on the sample. Of course, before testing, you should also check whether the sample contains flammable and explosive substances or substances that may cause strong corrosion.
Precautions before using the tensile testing machine
It is very necessary to check the tensile testing machine apparatus and equipment before use because it can ensure that the test is carried out smoothly and completely. To explain the precautions before using the tensile testing machine.
Matters to be checked before use.
1, the host must be grounded, connected to the power supply as required.
2, the rack of the tensile testing machine must be lubricated.
3, the load system of the tensile testing machine must be checked.
4, tensile testing machine transmission system check.
5, tensile testing machine beam of each speed operation is normal.
6, tensile testing machine control panel display and keys are normal.
7, the extensometer calibration and re-zero.
8, the inspection of accessories, such as pneumatic clamps, air compression pump, foot switch, etc.
A SIP Gateway is a device that processes and transmits voice data from an analog device to a digital device. SIP gateways are used with legacy phone systems to enable IP-PRI and can come in two forms:
1.Physical devices 2.Software
If you’re using an older, on-premise PBX, it will use a physical SIP gateway to transmit an analog signal into a digital format. But if you’re using a program that supports voice and/or video data, chances are it’s using SIP gateway software to process your data.
You use your phone system (also known as a PBX) every day, so you already know that phone systems are responsible for handling your call control and managing your connection to your telephone service provider. What you might not be familiar with is VoIP.
VoIP is short for Voice over Internet Protocol. VoIP is a way to make calls across your Local Area Network (LAN) and or Wide Area Network (WAN). The technology behind VoIP converts your analog voice into digital packets which are then sent across a network using the Internet Protocol (IP) to their end destination. VoIP is most commonly associated with making calls across the Internet.
As you've probably guessed, a VoIP phone system gets connected to your LAN. It uses your LAN as the backbone of the system – connecting your VoIP phones and your VoIP service provider to the VoIP PBX. That makes a VoIP phone system a phone system that uses IP technology to handle your call control and manage your connection to the Wide Area Network over which your VoIP service comes.
Even though a VoIP phone system uses VoIP and is connected to your LAN most systems can connect directly to the Publicly Switched Telephone Network (PSTN). This gives you the ability to use both VoIP and the PSTN for your calling.
Advancements and enhancements are a constant in the world of technology and communication. It is more important than ever to corral the compatible components of this evolving industry and allow them to become your allies in business and success. Unified Communications has many facets, and the list continues to grow. Here are a few of the most commonly integrated components:
Video Conferencing Voice Conferencing Instant Messaging/Chat Collaboration/document sharing Integrated and unified messaging: voicemail, email, fax, sms, Customer Record Management (CRMs) or Electronic Medical Records (ERMs) Unified Communications and Collaboration systems team up with many forms of technology, utilizing advances in the industry to maximize quality and efficiency.
The characteristics of lower box resistance furnace are briefly introduced. Box type resistance furnace is a kind of heating equipment for laboratory, industrial and mining enterprises, scientific research institutions to do element analysis and general small steel quenching, annealing, tempering and other heat treatment.
Characteristics of box type resistance furnace:
1. The shell of box type resistance furnace is made of high quality steel plate with electrostatic spraying on the surface and beautiful appearance;
2. The workroom is an integral furnace made of high alumina refractory. The heating wire is wound into a spiral shape and then wound in the four walls of the furnace. It has the characteristics of fast temperature rising, good heat preservation performance and uniform furnace temperature;
3. The electric furnace temperature controller used with the electric furnace adopts the new single chip microcomputer technology, which has the advantages of accurate temperature control and convenient use.
How to implement brazing process in vacuum furnace
When brazing in the vacuum furnace, put the brazed weldment into the furnace (or into the brazing container), close the furnace door (or close the brazing container cover), and pre vacuum before heating. Start the mechanical pump first, turn the steering valve after the vacuum reaches 1.35pa, turn off the direct channel between the mechanical pump and the brazing furnace, make the pipeline connect with the brazing furnace through the diffusion pump, rely on the mechanical pump and the diffusion pump to work within a limited time, pump the brazing furnace to the required vacuum, and then start the power on heating. During the whole process of heating, the vacuum unit should work continuously to maintain the vacuum degree in the furnace, offset the air leakage at various interfaces between the vacuum system and the brazing furnace, release the gas and water vapor absorbed by the furnace wall, fixture and weldment, and volatilize the metal and oxide to reduce the vacuum drop.
There are two kinds of vacuum brazing: high vacuum brazing and partial vacuum brazing. High vacuum brazing is very suitable for brazing base metal (such as nickel base superalloy) whose oxide is difficult to decompose. Part of vacuum brazing is used for base metal or brazing material volatilizing under brazing temperature and high vacuum conditions.
When special precautions must be taken to ensure high purity, vacuum cleaning method should be used before dry hydrogen brazing. In the same way, using dry hydrogen or inert gas purification method before vacuumizing will help to obtain better resources in high vacuum brazing.
Working principle and components of high temperature experimental furnace
To understand the working principle and components of high temperature experimental furnace, we will answer the following questions according to the above two points:
1. The working principle of high-temperature experimental furnace: using electricity as the heat source, the electric energy is transformed into heat energy through the electric heating element, and the metal is heated in the furnace. Resistance furnace and flame ratio, high thermal efficiency, up to 50-80 ℅, thermal system is easy to control, good working conditions, long furnace life, suitable for the heating of demanding workpieces.
2. Components: the furnace shell is made of high-quality cold-rolled steel plate folded and welded, the working room is made of high-quality silicon carbide refractory, and the high-quality insulation material is used as the insulation layer between the furnace and the furnace shell. In order to reduce the heat loss at the furnace mouth and improve the temperature uniformity in the furnace, a heat shield made of high-quality refractory material is installed inside the furnace door.
Characteristics of large vacuum pump and micro vacuum pump
With the rapid development of China's economy, the demand for vacuum pump in industry and other fields is growing. In the face of fierce competition in the vacuum pump market, how should users choose their products? What is the difference between large vacuum pump and micro vacuum pump.
The characteristics of large vacuum pump: high power, high limit vacuum, but high price, large volume, large weight, high noise, high energy consumption, need regular maintenance, not easy to move, etc. Some must use vacuum pump oil or lubricating oil, which will produce oil mist in work, but it will be wasted in low vacuum situation. For example, in the laboratory, only a small amount of gas needs to be sampled, analyzed, circulated, vacuum adsorbed, gas transferred, pressurized, indirectly absorbed water and drained by pump, many disadvantages of large vacuum pump have been exposed. So how to reduce these shortcomings is a very difficult job for professional staff, but it is still worth our expectation.
Micro vacuum pump features: small size, low noise, low power consumption, easy to operate, easy to carry, maintenance free, 24-hour continuous operation, also allows the medium rich in water vapor. The most important thing is that it is dry and oil-free and does not need vacuum pump oil or lubricating oil, so it will not pollute the working medium and interfere with the analysis of medium. And the price is much cheaper.
Countermeasures for high temperature of vacuum pump
The motor power and speed are matched with the imported vacuum pump and cannot be changed. The fan is installed on the main shaft of the motor. The speed of the motor determines the speed of the fan and cannot be replaced. Although increasing the number of fan blades can play a certain role, but the dynamic balance is not easy to find after the number of blades is increased. If the alignment is not good, the motor vibration will increase.
(1) The fan cover of the original vacuum pump was lengthened by 40cm, and an axial fan with the same diameter as the fan cover was installed inside. The motor power of the axial fan was 850W, the speed was 1489r / min, and the voltage was 380V. The original fan remains. The axial flow fan is equipped with another power supply control, and the axial flow fan is not interlocked with the main motor. Start the axial flow fan in time after starting the imported vacuum pump, and stop the axial flow fan 30 minutes after the vacuum pump stops, so as to make the main motor fully cooled.
(2) Regularly remove the dust on the vacuum pump motor, keep the motor heat sink clean and increase its heat dissipation capacity.
(3) Adjust the bus voltage of the imported vacuum pump to 400V.
Double stage slide valve vacuum pump with high pumping speed
For a long time, there are many difficulties and challenges in the development of double stage slide valve vacuum pump in our country. The production of 2H-150 and other products took more than 20 years after the standard was formulated. In fact, the design and manufacture of double stage slide valve vacuum pump with large pumping speed will encounter a series of problems, such as dynamic balance, control of two-stage oil supply, noise reduction and so on. However, the double stage slide valve vacuum pump with high pumping speed has a wide application prospect
Due to the structural characteristics, the capacity of the slide valve pump is much larger than that of the rotary vane pump. Because the slide valve vacuum pump can work in poor vacuum environment for a long time, it is often used in large vacuum equipment. The limit pressure of single-stage pump is between 0.6 PA and 1.3 PA (gas shut-off) and that of double-stage pump is 0.06 PA.
Pumping speed ≥ 150L / s can be regarded as a large-scale slide valve pump. For a long time, there are only 70L / s two-stage slide valve pump in China. However, if there is a double-stage slide valve vacuum pump with high pumping speed, it is particularly beneficial to simplify the unit structure of vacuum equipment, reduce power consumption, achieve energy-saving effect, simplify operation and improve control reliability.
Relationship between vacuum degree and pressure in vacuum pump selection
In the selection and use of vacuum pump, we usually use the limit pressure or vacuum degree, as well as pumping speed, flow and other parameters to determine the performance of vacuum pump. And then there's a problem here, where many customers struggle with the relationship between vacuum and pressure.
Vacuum refers to the rarefaction of a gas. We usually use "high vacuum" and "low vacuum" to express it. In other words, the rarer the gas is, the higher the vacuum degree is; otherwise, it means the vacuum is low, which is always expressed by pressure. The pressure in vacuum system is synonymous with pressure, which refers to the vertical force of gas on the surface of solid or liquid per unit area. Therefore, we can generally understand that the more gas, the greater the natural force on the surface of the object, the greater the pressure; on the contrary, the less gas, the smaller the force, the smaller the pressure.
The higher the vacuum degree is, the thinner the gas is. That is to say, the less the pressure on the object will be. The lower the vacuum degree is, the more gas there is, the greater the pressure will be.
Therefore, when we select the vacuum pump, we can see that the lower the limit pressure, the higher the vacuum degree of the vacuum pump, and the more thorough the corresponding pumping performance, which can achieve lower pressure in practical application.
27.10.2021 05:51
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