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Brief introduction of ipx9k High Temperature Pressure Jet Waterproof Test Chamber
The ipx9k High Temperature Pressure Jet Waterproof Test Chamber is characterized by a waterproof grade of 9, indicating high temperature and high pressure water spraying, and spraying high temperature and high pressure water in various directions of the shell for water spraying test. In addition, k represents a function of pressurization, and under such strict conditions, its water pressure will become stronger. The ipx9 is currently a high level of waterproof protection.
The IPx9 High Temperature Pressure Jet Waterproof Test Chamber is also widely used in fields such as LED lighting fixtures, display screens, household appliances industry, automobiles, and automotive accessories. At the same time, all dust and waterproof equipment can be customized according to user needs.
The ipx9k High Temperature Pressure Jet Waterproof Test Chamber has four different vertical spray angles, namely 0 °, 30 °, 60 °, and 90 °, and the water pressure can reach 8000 to 10000 Kpa; Moreover, its testing range is relatively broad, and it can be used for testing large samples (175 ± 25mm) and small samples (125 ± 25mm) of products. Of course, other rain test boxes are also available.
IPx9 High Temperature Pressure Jet Waterproof Test Chamber is a method of simulating high temperature and high pressure spray testing using an artificial system to conduct a waterproof, high temperature and high pressure rain impact test on the product. In addition, its model styles can be divided into open type and chamber type.
1. Suitable for IPX9K waterproof grade testing of products.
2. The shell is made of high-quality steel plate made in China, and the surface is sprayed with baking paint, making it beautiful and durable.
3. The inner chamber and turntable are all made of SUS304 # stainless steel plate, ensuring that they do not rust during long-term use.
4. Chamber structure; Self contained water tank, circulating water; A water level sensor is installed in the water storage tank to automatically control water inflow, and a low water level alarm detection is provided to effectively prevent the water pump from becoming damaged due to water shortage.
5. There is a transparent observation window (made of tempered glass) on the door, and an LED lamp is installed inside the box to facilitate observation of internal testing.
6. Four fan shaped nozzles are uniformly distributed within 90 ° vertically on the right side of the chamber, and are designed and manufactured in strict accordance with standards:
7. Turntable drive: Using a stepper motor, the speed can be set (adjustable) on the touch screen, and is accurately and steplessly adjustable within the standard range.
8. This test chamber uses a complete set of imported water pumps from Italy, which are resistant to high temperature and pressure, can be used for a long time, and has stable performance.
9. The test time can be set on the touch screen, with a setting range of 0-999min (adjustable).
What are the experimental conditions for the IPx9 High Temperature Pressure Jet Waterproof Test Chamber?
First, within the testing range, the ipx9 High Temperature Pressure Jet Waterproof Test Chamber needs to have four vertical directions, namely zero, thirty, sixty, and ninety degrees. Its water temperature needs to reach normal temperature: (25 ℃) or 80 ± 5 ℃ (the deviation temperature can be agreed). The total testing time is 120S, and the testing time for each angular position is 30 seconds, which can be adjusted according to the user’s testing needs.
IPx9 High Temperature Pressure Jet Waterproof Test Chamber is subdivided into two different models: open type and chamber type. It uses the method of artificial simulation system high temperature and high pressure spray testing to conduct a waterproof high temperature and high pressure rain impact test on the product. The purpose of the test is to evaluate whether the product has achieved waterproof performance and achieved factory use through testing.
JL-9K1L High Temperature & Pressure Jet Waterproof Test Chamber is according to IEC60529:1989 +A1:1999 +A2：2013 《Degrees of protection provided by enclosures(IP Code)》, GB4208, DIN40050-9，GB7000.1，ISO20653 and VW80000 for protection level IPX9K testing. It is a waterproof test machine designed for vehicle spare parts, electrical and electronic industry, to simulate natural environment or human factors.
JL-9K1L High Temperature Pressure Jet Waterproof Test Chamber
Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.
Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.
Please feel free to contact us if you need any support.
Tech Dep: [email protected], Cell/WhatsApp:+8615317907381
Sales Dep: [email protected], Cell/WhatsApp:+8618117273997
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Exploring What Is A Bulk Current Injection?: A Deep Understanding of the Working Principles and Applications of Bulk Current Injection Test System（BCI）
What Is A Bulk Current Injection:
High current injection is a testing technique in automotive electronics used to verify whether a product will experience functional degradation or exceed tolerance limits when subjected to electromagnetic interference of different frequency ranges. This test is commonly encountered in EMC testing for automotive electronics, as in actual vehicle scenarios, the connecting cables for different onboard components are often bundled together.
This leads to the coupling of electromagnetic interference signals of different frequencies, which in extreme cases, can result in failure of the affected components, posing a risk to the safety of the vehicle. Hence, the purpose of high current injection testing is to simulate the injection of RF signals onto the power or signal lines of the product being tested in order to verify whether its function will degrade or its performance indicators will remain within tolerance limits.
High current injection testing is a commonly used method and has widespread applications in electromagnetic compatibility (EMC) laboratories. It is mainly used to measure the EMI/RFI disturbance characteristics of devices in the high frequency to ultra-high frequency range. In practical applications, high current injection testing can be used to evaluate the relative compatibility between equipment and other electronic devices or systems.
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Future Trends and Developments in Rapid Temperature Change Test Chamber Technology
Rapid temperature change test chamber:
Suitable for aerospace, information electronics, instrumentation, materials, electrical, electronic products, and various vital parts to judge whether parameters such as reliability, machine stability, and performance are qualified in high and low temperature or humid heat environments, and will be provided to The basis for you to predict and improve product quality and reliability.
The rapid temperature change test chamber is divided into three parts: high temperature area, low temperature area and test area. It adopts the original Japanese Youyi control brand temperature instrument, Chinese and English display control system; it has a fully automatic and high-precision system. Any part of the movement is completely controlled by P.L.C. Locking processing; automatic circuit and warning signal when the parts fail; emergency stop device when the input voltage is unstable.
The heating and cooling humidification system of the test chamber is independent, which can improve efficiency, reduce test cost, increase life, and reduce failure rate; the cold machine adopts French Taikang fully enclosed compressor unit, and its refrigeration system adopts unit or binary low temperature Loop system design; its multi-wing blower has strong air circulation, which can avoid any dead angle and make the temperature and humidity distribution in the test area even.
The rapid temperature change test chamber is mainly used to simulate the testing of electronic components under high and low temperature or main humid and hot natural environment conditions; the electrical components of the test chamber mainly include: heating system, refrigeration system and control system.
The characteristics of the rapid temperature change test chamber:|
a. Intelligent control system: Automatically start the large compressor to cool down when the temperature is rapidly cooled, and the high temperature and temperature rise process is linearly controlled by the balance temperature of the small compressor to save energy;
b. Energy-saving, carbon-reducing and power-saving design, rapid temperature change test chamber stability and energy-saving effect, can save more than 30% year-on-year;
c. The controller operation adopts the new fuzzy algorithm technology to control and automatically adjust the cold coal flow, effectively taking away the heat load of the tested product to achieve the control effect;
d. The rapid temperature change test chamber can set different stress screening temperature change rates of 5°C/min, 10°C/min, 15°C/min, 20°C/min;
e. It can perform various tests such as rapid temperature change (stress screening), condensation test, high temperature and high humidity, temperature and humidity cycle;
f. Meet the requirements of stress screening test for electronic equipment products;
Scientific design of rapid temperature change test chamber:
The rapid temperature change test chamber imports “program controller, color liquid crystal display touch screen, imported refrigerator, digital display, etc., and is equipped with micro-printer, new technology of energy regulation, and has many functions such as over-temperature, over-pressure, compressor overheating and power shortage. a protective function.
The high-strength and high-reliability structural design of the rapid temperature change test chamber ensures the high reliability of the equipment; the material of the studio is “SUS304 stainless steel anti-corrosion” to achieve a long service life, and the surface spray treatment is to ensure the “long-lasting” of the equipment Anti-corrosion function and appearance life”; high-strength and temperature-resistant silicone rubber sealing strip ensures the high sealing of the door of the test chamber equipment; a variety of optional functions can ensure the needs of users for various functional tests.
The air duct of the rapid temperature change test chamber is located at the rear of the working room, and the heater, cooling evaporator fan blade and other devices are distributed in the interlayer of the air duct. This test chamber uses multiple fans to circulate the air in the chamber, and when the fan rotates at a high speed, the air in the working room is sucked into the air duct from the bottom, and blown out from the top of the air duct after heating/cooling, and the air in the working room is exchanged with the sample. The air is then sucked into the air duct, so it circulates repeatedly to achieve the temperature setting requirement.
How to choose a rapid temperature change test chamber?
To buy a rapid temperature change test chamber, you must know its purpose and quality, and the test chamber is suitable for aerospace products, information electronic instruments, materials, electronic and electrical products, and various electronic components under the condition of rapid temperature changes Check the various performance indicators of the product; this is the purpose we must know.
The next step is to understand its temperature and quality. There are several options for the temperature of Linpin’s rapid temperature change test chamber (A: -20℃～150℃ B: -40℃～150℃ C: -60℃～150℃ ℃), so you need to buy according to your own needs when choosing.
Then there is the quality of this test chamber. In fact, users who choose Lisun test chamber don’t have to worry about this, because about 90% of each Linpin equipment uses imported spare parts, such as important controllers. , which adopts the temperature instrument of “UYICON” brand imported from Japan, and the compressor is used for French Taikang (Germany Bitzer)
Finally, find out whether the required rapid temperature change test chamber can meet the demand. If it can meet the demand, then consult whether the manufacturer has after-sales service (in the future, if the equipment fails, it can be repaired in time), so that you can know that it belongs to the manufacturer, but We cannot rule out that it is the manufacturer, so a site visit is required.
If you want to be simple, don’t ask whether there is after-sales service, but just ask if you can conduct an inspection. If you say yes, it can prove that the manufacturer has after-sales service. From it, we can see the workmanship of the rapid temperature change test chamber and how to treat the details.
As mentioned above, the rapid temperature change test chamber has been on the rise. This is because technology has become more and more developed, which makes people more and more pursuing perfect items. And the test chamber is constantly pursuing a higher level with the loss of time. Although the current equipment can be regarded as a perfect handicraft compared with the past, if it stops and does not look forward, then the equipment will be eliminated. It’s a big loss for a product that needs to be inspected, so the environmental equipment will evolve even better over time.
The rapid temperature change & humidity heat test chamber is a temperature and humidity test device, applied for aerospace products, information electronic instruments, electrical, electronic products, and various electronic components to test various products under the condition of rapid temperature change performance.
KWB-054D Rapid temperature change & humidity heat test chamber
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The Role of High and Low Temperature Shock Test Chambers in Material and Component Testing
The high and low temperature shock test chamber is the necessary testing equipment for metal, plastic, rubber, electronics and other material industries. It is used to test the material structure or composite material. Detect the chemical change or physical damage of the sample caused by thermal expansion and contraction in the shortest time.
The high and low temperature shock test is used to assess the adaptability of the product to the sharp change of the ambient temperature. It is an indispensable test in the identification test of the equipment design and the routine test in the batch production stage. In some cases, it can also be used for environmental stress. screening test. It can be said that the frequency of application of the thermal shock test chamber in verifying and improving the environmental adaptability of equipment is second only to vibration and high and low temperature tests.
The high and low temperature shock test chamber is divided into three-chamber type and two-chamber type according to the test requirements and test standards. The difference lies in the test method and internal structure.
The three-chamber type is divided into a cold storage room, a heat storage room and a test room, and the product is placed in the test room during testing. The two-chamber type is divided into a high-temperature room and a low-temperature room.
The high and low temperature switching is realized through the movement of the basket driven by the motor. The product is placed in the basket and moves with the basket.
Working principle of refrigeration:
Both the high and low refrigeration cycles adopt the reverse Carroll cycle, which consists of two isothermal processes and two adiabatic processes.
The process is as follows: the refrigerant is adiabatically compressed to a higher pressure by the compressor, which consumes work to increase the exhaust temperature, and then the refrigerant conducts heat exchange with the surrounding medium isothermally through the condenser, and transfers the heat to the surrounding medium.
Finally, the refrigerant expands adiabatically through the valve to do work, and the temperature of the refrigerant decreases at this time.
Finally, the refrigerant absorbs heat isothermally from the object with higher temperature through the evaporator, so that the temperature of the object to be cooled is lowered. This cycle is repeated so as to achieve the purpose of cooling.
In fact, as a tool, the high and low temperature impact test chamber has different purposes in different stages of product development:
1. The engineering development stage can be used to find product design and process defects;
2. Provide basis for product finalization or design identification and acceptance decision in batch production stage;
3. When used as an environmental stress screening application, the purpose is to eliminate early failures of products.
Rapid change of temperature difference in High and Low Temperature Thermal Shock Chamber:
1. The product has beautiful appearance, reasonable structure, advanced technology, excellent material selection, easy operation and reliable equipment performance.
2. Double-chamber hanging basket structure, the upper high-temperature chamber, the lower low-temperature box, the impact method is the high-temperature chamber, the low-temperature chamber stops, and the test piece is quickly moved into the high-temperature chamber by hanging and moving up and down to achieve cold and hot impact test.
3. The metering device adopted, the controller adopts a large-scale man-machine dialogue man-machine interface controller, Chinese and English LCD screens, and various complex programs can be set. The program setting adopts man-machine dialogue, which is easy to operate, easy to learn, stable and reliable.
4. Adopting advanced circulating air design, the indoor temperature is uniform and avoids any dead angle; the perfect safety protection device avoids any potential safety hazards and ensures the long-term reliability of the equipment.
Test requirements:
initial temperature requirements
Although the general thermal shock test standard does not mention or do not make rigid regulations on the starting temperature of the thermal shock test, this is a problem that must be considered when the test is carried out, because it involves whether the test ends at low temperature or high temperature State, which determines whether the product needs to be dried, resulting in extended test time.
If the test is completed and the low temperature standard test product is taken out of the High and Low Temperature Thermal Shock Chamber, it should be recovered under normal test atmospheric conditions until the sample reaches a stable temperature. This operation will inevitably cause condensation on the surface of the test sample. The effect of dew introduction temperature on the product. thereby changing the nature of the experiment.
Test time requirements:
1. Stipulates the lower limit of 1h, that is, the temperature stabilization time is less than 1h, it must be 1h; if it is greater than 1h, use the time greater than 1h;
2. There are 5 time levels from 10min to 3h given in GB2423.22. According to the temperature stabilization time of the product measured by the thermal shock test chamber, the time closest to it or the optional time level is used, and the closest time is directly used. A similar time is used as the hold time;
3. In 810F method 503.4, no specific time or optional time level is specified, and the time when the product reaches temperature stabilization or the actual exposure time of the product in the environment is directly used.
The performance indicators of the High and Low Temperature Thermal Shock Chamber are as follows:
The accuracy is reflected by the difference between the set value and the actual detection value. The popular point is the uniformity and volatility of the chamber.
The “mid-test test” uses high and low temperature resistant circulating fans in the high temperature area and low temperature area. Circulation, no matter how uniform the temperature is, it will not exceed ±3°C, and the fluctuation of the chamber is ±0.5°C (when the shock stabilizes and returns to the constant temperature in the stable chamber).
The functional technical indicators of the High and Low Temperature Thermal Shock Chamber include impact sensitivity, temperature conversion speed, and accuracy.
In the temperature shock test, the most critical thing is to establish the stress caused by the inconsistent thermal expansion and contraction of different materials.
The actual thermal shock is most likely to occur on the outside of the product under test. Relevant data point out that it is not necessary to stabilize the temperature of the entire product, but as long as the surface and temperature of the product under test are consistent with the test temperature.
High and Low Temperature Thermal Shock Chamber can be used in the temperature shock test and fast-changing temperature test in a wide range such as aviation, air space, electronic components and material research.
HLST-500D has two separate chambers: high temperature chamber and low temperature chamber.
HLST-500T has three separate chambers: high temperature chamber, low temperature chamber and test chamber.
HLST 500D High and Low Temperature Thermal Shock Chamber
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The Role of Spectrophotometer in Color Management and Colorimetry
The spectrophotometer uses the grating spectrophotometer principle for color measurement. A grating is an optical element that is engraved with a set of parallel periodic lines or grooves (often inclined) on a plane.
When a beam of compound light is incident on the grating plane, its periodic structure will undergo diffraction, and the transmitted or reflected diffraction light will also interfere. The energy of the light will be redistributed, and different wavelengths of light will travel in different directions, forming a specific wavelength superposition extremum at a certain position, thereby achieving light splitting.
Spectroscopic colorimeters can produce spectral curves, which are equivalent to a color’s ID card and are unique. Therefore, the color data read by the spectrophotometer is absolutely accurate.
The role of spectrophotometer in colorimetry:
The chemical industries such as textiles, printing and dyeing, petroleum, and batteries often generate a lot of industrial wastewater during the production process. The national standards for detecting the chromaticity of wastewater mainly use platinum cobalt colorimetry and dilution multiple method.
The platinum cobalt chromaticity is expressed in Hazen units, with 1 milligram of platinum per liter of solution containing chloroplatinic acid and 2 milligrams of hexahydrate cobalt chloride solution having a platinum cobalt chromaticity of 1 unit. The general range of values is between 1 and 500. Suitable for measuring the color of liquid chemical products that are transparent or slightly close to the reference platinum cobalt color number, this color characteristic is usually brownish yellow.
Limitations of human eye colorimetry; The platinum cobalt colorimetric method is based on human eye judgment, and the color is influenced by environmental light sources, observation angles, and other factors. In actual visual colorimetry, there are certain differences.
Platinum cobalt chromaticity can not only be applied in water quality analysis, but also be used to measure the chromaticity of solutions of chemicals, petrochemical products, such as glycerol, solvents, plasticizers, carbon tetrachloride, petroleum alcohols, etc.
Given the shortcomings of the platinum cobalt colorimetric method in actual color comparison, a spectrophotometer can also be used to compare solution colors.
The use of a spectrophotometer for measurement has the following three major advantages:
1. There is no need to configure a solution and no need to consider material storage issues;
2. The instrument is easy to operate and can be directly measured;
3. Platinum cobalt data is clear at a glance.
The desktop spectrophotometer can measure the chromaticity indicators of platinum cobalt, Gardner, Saybolt, and ASTM.
The role of spectrophotometer in color management:
The spectrophotometer can display chromaticity information based on the internally set chromaticity space and calculation formula, and output it in digital form. In addition, spectrophotometer can also analyze potential spectral data information based on chromaticity data.
The spectrophotometer is designed for data comparison and simulation of visual chromaticity, and is also an important auxiliary tool for computer color matching, which can help major manufacturers complete the analysis, processing, and monitoring of spectral and chromaticity information perfectly.
In the use of spectrophotometer, a crucial data equation – the color tolerance equation – is involved. In fact, we usually refer to the tolerance range, and in industrial batch production, there are tolerances to control the product and qualification status, which is fast and reasonable.
The spectrophotometer wants to measure the color difference of the product and control it, which is the same as a regular color difference meter. Firstly, it needs to measure the information of the standard sample product, and then compare the color information of the measured sample to obtain color difference data.
Calculate whiteness. It can perform white measurement on the whitened sample according to relevant formulas, and then provide specific whiteness values to see if they can meet the standard requirements.
Calculate the strength of the dye. Different dye batches may result in dyeing differences. Therefore, a spectrophotometer can be used to read the relevant finished product samples, and then see the differences between the products produced by these two different batches of dyes. Then, the relevant differences can be filled in the correction coefficient, and the formula can be automatically adjusted to ensure consistent dyeing results.
Calculate the color depth. Because in the actual production process, there may be certain differences in color depth due to differences in formula or production process, and some of these differences cannot be judged by the naked eye. In this case, it is necessary to analyze them through professional equipment such as a spectrophotometer.
Application of spectrophotometer:
1. Food industry
The color of food has a significant impact on people’s appetite, so the food industry has very high requirements for color. The spectrophotometer can quickly measure the color of food to ensure good color and compliance with safety standards.
2. Cosmetics industry
The color of cosmetics is very important for consumers, and good colors can help consumers quickly distinguish different brands. A spectrophotometer can help cosmetic manufacturers ensure that their products have colors that match standard colors.
3. Textile industry
The color of textiles is also very important as it can affect consumers’ purchasing decisions. A spectrophotometer can help textile manufacturers ensure that their products have accurate color and chromaticity values.
4. Semiconductor industry
In the semiconductor manufacturing process, spectrophotometer can help detect the color of transistors, LEDs, and other electronic components. This is crucial for maintaining product consistency and quality.
Advantages of spectrophotometer:
1. High measurement accuracy
The spectrophotometer has high measurement accuracy and can achieve extremely high color accuracy. This is very important for applications that require high-precision color measurement, such as color identification, color matching, etc.
2. Overall measurement speed is fast
In traditional color measurement methods, multiple measurements are required to obtain high-precision results. The spectrophotometer can quickly complete the overall measurement, saving a lot of time.
3. With a recorder
The spectrophotometer has a recorder that can save measurement data during measurement. This is very convenient for later data analysis and comparison.
4. Easy to use
The spectrophotometer is convenient to use and easy to operate. There is no complex operation process, and color measurement can be completed in a few simple steps.
Benchtop Spectrophotometer (Transmittance) DSCD-910 is good performance and specially designed for testing the transparent material’s transmittance, absorbance, chromaticity value and other parameters.
DSCD-910_Benchtop Spectrophotometer (Transmittance)
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Choosing the Right High and Low Temperature Shock Test Chamber for Your Testing Needs
High and Low Temperature Thermal Shock Chamber are used in electronic and electrical components, automation components, communication components, automotive parts, metals, chemical materials, plastics and other industries, as well as in the physical changes of national defense industry, aerospace, military industry, BGA, PCB base plates, electronic chip ICs, semiconductor ceramics, and polymer materials,
Testing the repeated tensile force of its materials against high and low temperatures and the chemical change or physical damage produced by the thermal expansion of the product can confirm the quality of the product. It can be used from precision IC to heavy machinery components, and is an indispensable test chamber for product testing in various fields.
The High and Low Temperature Shock Test Chamber for Your Testing Needs simulates the alternating changes of high and low temperature environments, exposing products to problems in harsh environments. It is a very important testing equipment in multiple industrial manufacturing fields.
How to choose a suitable high and low temperature shock test chamber?
The selection of equipment is not as expensive as possible, but rather to choose products that are suitable for oneself. The manufacturer of the High and Low Temperature Shock Test Chamber will tell you how to choose the equipment reasonably:
1. Two chamber vs. three chamber
The two chamber shock only has high and low temperature shocks, while the three chamber shock has a room temperature transition in the middle. For products, there is no transition at room temperature, which is more destructive and imposes stricter requirements on the product.
2. Water cooled vs. air cooled
Normally, a temperature of -40~+150 ℃ for 50L-100L is sufficient for air cooling. A larger capacity and a lower temperature (100L/-70 ℃) for water cooling provide more stable performance.
3. Material and inward dimensions
The cold and hot shock chamber usually has two materials: stainless steel and baking paint, which can be customized according to needs. The stainless steel material is beautiful and easy to care. The baking paint color can be selected by yourself, and can be matched with other equipment colors.
The thickness of the board has an impact on the quality of the equipment, because the thickness of the board is too thin, and the equipment is prone to deformation when the bearing weight is too large or the temperature is too high. Most equipment suppliers choose qualified sheet materials.
The board of conventional equipment is generally 1.0mm or 1.2mm, so the thickness of the material is important for the quality of the equipment. When selecting equipment, it is important to have a clear understanding.
From the perspective of internal chamber size, the specification requires that the product must be placed inside the testing area. Some
The manufacturer places the product inside the air duct, although it is only 10cm away from the testing area, this energy difference is quite significant. And it cannot truly reflect the temperature changes on the surface of the test object. So choose the appropriate inner box size.
On the market, the conventional capacity of the cold and hot shock test chamber is 50L, 80L, 100L, 150L, 225L, 408L, 800L, 1000L, etc. It is recommended that you choose the capacity based on the long-term test demand.
4. Impact temperature
Pay attention to the large range of temperatures that can actually be reached in the testing area. Note that it is not the limit temperature for preheating and precooling chambers. The test load directly affects how many test items can be placed. Generally speaking, the larger the weight, the better.
Select appropriate temperature impact range of cold and hot impact test chamber according to relevant test standards of product materials (national standard/military standard/European and American standard), generally - 40 ℃~+150 ℃- 55℃～+150℃；- 70 ℃~+150 ℃, of course, different impact ranges can also be selected for different products.
High and Low Temperature Thermal Shock Chamber can be used in the temperature shock test and fast-changing temperature test in a wide range such as aviation, air space, electronic components and material research.
HLST-500D has two separate chambers: high temperature chamber and low temperature chamber.
HLST-500T has three separate chambers: high temperature chamber, low temperature chamber and test chamber.
Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.
Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.
Please feel free to contact us if you need any support.
Tech Dep: [email protected], Cell/WhatsApp:+8615317907381
Sales Dep: [email protected], Cell/WhatsApp:+8618117273997
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Delving into Isolation Transformers: Principles and Functions Explained
Isolation transformers, also known as safety transformers, are transformers designed to electrically isolate the input winding from the output winding. They are used to isolate two or more coupled circuits electrically. The primary function of isolation transformers includes facilitating safe operations during machine maintenance and upkeep, providing protection against lightning and filtering functions. Their design prevents accidental contact with live components, thereby ensuring a safer working environment.
Isolation transformers serve as essential safety power devices, commonly used in machine maintenance and protective applications. They are characterized by electrical isolation between the input and output windings. Typically, isolation transformers are 1:1 transformers, meaning the voltage ratio between the input and output sides is the same. For instance, in a single-phase isolation transformer, the primary and secondary voltages could both be 220V, ensuring safe electrical isolation for machine maintenance and other applications requiring electrical isolation.
Moreover, in three-phase isolation transformers, both the primary and secondary voltages could be 380V, suitable for electrical protection and isolation applications within three-phase power systems.
Principles of Isolation Transformers:
The principle of isolation transformers involves utilizing the basic principle of electromagnetic induction to electrically isolate the input winding (primary winding) from the output winding (secondary winding). The main purpose is to prevent dangers arising from accidental contact with live components or potentially energized metal parts due to insulation damage.
Isolation transformers operate similarly to conventional dry-type transformers based on electromagnetic induction. They consist of a primary iron core surrounded by one or more windings. When the primary winding is energized, a magnetic field is induced through the iron core to the secondary winding, thereby inducing a corresponding voltage in the secondary winding. However, unlike conventional transformers, the windings of isolation transformers are not directly electrically connected; they transfer energy through magnetic induction.
Key Functions of Isolation Transformer Principles:
• Electrical Isolation: Isolation transformers electrically isolate the input and output windings, effectively preventing direct electrical connections between them. This isolation helps in blocking electrical interference and noise propagation between circuits, enhancing system stability and safety. Especially in environments with high voltages or dangerous electrical potentials, isolation transformers prevent accidental electrical shocks.
• Suppression of High-Frequency Noise: Isolation transformers feature iron core materials with high-frequency loss characteristics, effectively absorbing and suppressing high-frequency signals and noise. This prevents interference signals from entering control circuits or other sensitive circuits, improving system resistance to interference and stability.
• Protection of Personal Safety: In electrical systems, especially low-voltage power supply systems, neutral lines (zero lines) are typically connected to ground potential. This poses a risk of electrical shock when exposed to live components. Isolation transformers, by floating the secondary side (output side) relative to ground potential, prevent the formation of a complete circuit even when a person contacts live components, reducing the risk of electrical shock and ensuring personal safety.
ITEU-SP4K Isolation Transformer
Typical Applications of Isolation Transformers:
• Isolation of Equipment from AC Power Lines: The most common application of isolation transformers is to electrically isolate equipment from AC power lines. For example, in switch-mode power supplies (SMPS), isolation transformers separate the primary circuit from the secondary circuit, preventing circuit interference and accidental electrical shock.
• Safe Fault Diagnosis: During circuit troubleshooting, isolation transformers provide a safe grounding point, preventing short circuits between oscilloscope probes and the main circuit, thus safeguarding essential components and testing equipment.
• Elimination of Grounding Issues: Isolation transformers eliminate safety hazards caused by ground potential differences. By isolating the ground reference point to a safe location, they prevent circuit short-circuiting and damage caused by ground issues.
• Diagnosis and Correction of Grounding Circuits: In situations where multiple devices with individual grounding return paths are interconnected, isolation transformers are used to diagnose and correct grounding circuit issues, identifying the sources of ground leakage currents.
• High-Frequency Noise Suppression: Isolation transformers reduce the transmission of high-frequency noise and interference between circuits. Their series inductance and Faraday shielding effectively suppress capacitive coupling between the two ends of the transformer.
In conclusion, isolation transformers play a critical role in electrical systems by providing electrical isolation, safety protection, and interference suppression. They are essential components in circuit design and maintenance, ensuring system reliability and safety.
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Revolutionizing Color Measurement with the Latest Benchtop Spectrophotometer Technology: A Comparison to Traditional Spectrophotometers
The spectrophotometer uses the grating spectrophotometer principle for color measurement. A grating is an optical element that is engraved with a set of parallel periodic lines or grooves (often inclined) on a plane.
When a beam of compound light is incident on the grating plane, its periodic structure will undergo diffraction, and the transmitted or reflected diffraction light will also interfere. The energy of the light will be redistributed, and different wavelengths of light will travel in different directions, forming a specific wavelength superposition extremum at a certain position, thereby achieving light splitting.
Spectroscopic colorimeters can produce spectral curves, which are equivalent to a color's ID card and are unique. Therefore, the color data read by the spectrophotometer is absolutely accurate.
I. The role of spectrophotometer in colorimetry:
The chemical industries such as textiles, printing and dyeing, petroleum, and batteries often generate a lot of industrial wastewater during the production process. The national standards for detecting the chromaticity of wastewater mainly use platinum cobalt colorimetry and dilution multiple method.
The platinum cobalt chromaticity is expressed in Hazen units, with 1 milligram of platinum per liter of solution containing chloroplatinic acid and 2 milligrams of hexahydrate cobalt chloride solution having a platinum cobalt chromaticity of 1 unit. The general range of values is between 1 and 500. Suitable for measuring the color of liquid chemical products that are transparent or slightly close to the reference platinum cobalt color number, this color characteristic is usually brownish yellow.
Limitations of human eye colorimetry; The platinum cobalt colorimetric method is based on human eye judgment, and the color is influenced by environmental light sources, observation angles, and other factors. In actual visual colorimetry, there are certain differences.
Platinum cobalt chromaticity can not only be applied in water quality analysis, but also be used to measure the chromaticity of solutions of chemicals, petrochemical products, such as glycerol, solvents, plasticizers, carbon tetrachloride, petroleum alcohols, etc.
Given the shortcomings of the platinum cobalt colorimetric method in actual color comparison, a spectrophotometer can also be used to compare solution colors.
II. The use of a spectrophotometer for measurement has the following three major advantages:
1. There is no need to configure a solution and no need to consider material storage issues;
2. The instrument is easy to operate and can be directly measured;
3. Platinum cobalt data is clear at a glance.
The desktop spectrophotometer can measure the chromaticity indicators of platinum cobalt, Gardner, Saybolt, and ASTM.
III. The role of spectrophotometer in color management:
The spectrophotometer can display chromaticity information based on the internally set chromaticity space and calculation formula, and output it in digital form. In addition, spectrophotometer can also analyze potential spectral data information based on chromaticity data.
The spectrophotometer is designed for data comparison and simulation of visual chromaticity, and is also an important auxiliary tool for computer color matching, which can help major manufacturers complete the analysis, processing, and monitoring of spectral and chromaticity information perfectly.
In the use of spectrophotometer, a crucial data equation - the color tolerance equation - is involved. In fact, we usually refer to the tolerance range, and in industrial batch production, there are tolerances to control the product and qualification status, which is fast and reasonable.
The spectrophotometer wants to measure the color difference of the product and control it, which is the same as a regular color difference meter. Firstly, it needs to measure the information of the standard sample product, and then compare the color information of the measured sample to obtain color difference data.
Calculate whiteness. It can perform white measurement on the whitened sample according to relevant formulas, and then provide specific whiteness values to see if they can meet the standard requirements.
Calculate the strength of the dye. Different dye batches may result in dyeing differences. Therefore, a spectrophotometer can be used to read the relevant finished product samples, and then see the differences between the products produced by these two different batches of dyes. Then, the relevant differences can be filled in the correction coefficient, and the formula can be automatically adjusted to ensure consistent dyeing results.
Calculate the color depth. Because in the actual production process, there may be certain differences in color depth due to differences in formula or production process, and some of these differences cannot be judged by the naked eye. In this case, it is necessary to analyze them through professional equipment such as a spectrophotometer.
IV. Application of spectrophotometer:
1. Food industry
The color of food has a significant impact on people's appetite, so the food industry has very high requirements for color. The spectrophotometer can quickly measure the color of food to ensure good color and compliance with safety standards.
2. Cosmetics industry
The color of cosmetics is very important for consumers, and good colors can help consumers quickly distinguish different brands. A spectrophotometer can help cosmetic manufacturers ensure that their products have colors that match standard colors.
3. Textile industry
The color of textiles is also very important as it can affect consumers' purchasing decisions. A spectrophotometer can help textile manufacturers ensure that their products have accurate color and chromaticity values.
4. Semiconductor industry
In the semiconductor manufacturing process, spectrophotometer can help detect the color of transistors, LEDs, and other electronic components. This is crucial for maintaining product consistency and quality.
V. Advantages of spectrophotometer:
1. High measurement accuracy
The spectrophotometer has high measurement accuracy and can achieve extremely high color accuracy. This is very important for applications that require high-precision color measurement, such as color identification, color matching, etc.
2. Overall measurement speed is fast
In traditional color measurement methods, multiple measurements are required to obtain high-precision results. The spectrophotometer can quickly complete the overall measurement, saving a lot of time.
3. With a recorder
The spectrophotometer has a recorder that can save measurement data during measurement. This is very convenient for later data analysis and comparison.
4. Easy to use
The spectrophotometer is convenient to use and easy to operate. There is no complex operation process, and color measurement can be completed in a few simple steps.
Benchtop Spectrophotometer (Transmittance) DSCD-910 is good performance and specially designed for testing the transparent material’s transmittance, absorbance, chromaticity value and other parameters.
Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.
Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.
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Double Wing Package Drop Test Equipment and Drop Testing Standards: The Crucial Technology for Product Safety Assurance
Drop Testing Standards: GB/T2423.8, ISTA, IEC60068-2-32, GB/T4857.5, GJB150, IEC60068-2-27
1. Application and Purpose of Drop Testing Machines:
With the rapid development of the logistics industry, paper boxes and packaging materials often suffer from collisions and falls during transportation. Drop testing machines are mainly used to simulate the impact of falls on packaging materials during transportation and handling, to evaluate the impact resistance of packaging materials and the validity of packaging design. Drop testing machines are widely used in areas such as commerce, inspection, enterprises, technical supervision agencies, and schools. They can perform face drops, corner drops, and edge drops. By simulating falls at different angles and heights, the damage of the product can be understood, and the maximum height and impact resistance during a fall can be evaluated. Based on the results of the test, packaging design can be improved and perfected to enhance the protective performance of the product.
2. Working Principle of Drop Testing Machines
Drop testing machines are used to evaluate the vertical impact resistance of packaging and their ability to protect packaged contents. They conduct tests by dropping packaging materials from specified heights onto a hard, flat horizontal surface. During the test, the relevant parameters are controlled by adjusting the device, based on the height to be tested, allowing the packaging to freely fall and collide with the impact surface. This testing method can simulate the falls that products may experience during transportation.
The scope of application for drop testing machines includes:
• Simulating repeated free falls that connectors, small remote devices, and other products may experience while loaded on cables.
• Drop testing for packaging.
• Free falls that products may experience during transportation in a non-packaged state.
3. Classification of Drop Testing Machines
Drop testing machines are primarily divided into three types: zero drop testing machines, single-arm drop testing machines, and double wing package drop test equipment.
• Zero drop testing machines are mainly used to assess the effects of actual transportation and handling on packaging materials, and to evaluate their impact strength and the validity of packaging design during handling. They are suitable for drop testing larger packaging and test pieces.
• Single-arm drop testing machines use a brake motor and chain drive to control the rise and fall of the arm. The drop height is measured using a numerical height scale, ensuring high accuracy and providing a clear display. The operation is simple, and the lifting and falling of the arm is stable, with minimal error in the angle of the drop. They are suitable for all types of manufacturers and quality inspection departments.
• Double wing package drop test equipment can meet the demands of product resistance during transportation, and thus improve and perfect packaging design. They use a dual-column structure, equipped with spring cushioning devices and a height scale indicator, ensuring stable and reliable operation. They are capable of performing corner drops, complying with the requirements of GB/T4857.5-92 and ISO2248-1972(E) standards.
4. Operating Instructions for Drop Testing Machines
• The drop condition of the test piece can be preset as a face, edge, or corner drop.
• The drop height can be preset, and the test piece will automatically be positioned when it reaches the set height.
• The operating mechanism is flexible, ensuring that the test piece is not disturbed by any external forces during release and free fall, and ensuring that it meets the required drop status.
• The structure of the drop testing machine is scientifically designed, with a safe and reliable inclined impact test platform.
• This machine can perform slanted platform impact testing for transport packaging to determine their impact resistance and the ability to protect contents, as well as free-fall tests for faces, corners, and diamonds.
DT-60KG Automatic Double Drop Test Machine
5. Precautions for Drop Testing Machines
• It is important to ensure that the test piece is not affected by external forces during the falling process.
• Appropriate spacers should be used to ensure that the test piece maintains a horizontal position during the drop.
• When using the inclined test platform, the test piece must be placed on the appropriate end surface.
• When using the drop testing machine, the operating instructions must be followed.
• Maintenance and upkeep of the drop testing machine require careful and cautious operation to prevent damage.
• During drop testing with the drop testing machine, it is important to ensure that the test piece does not cause damage to the equipment and to prevent potential safety hazards.
6. Operating Instructions for Drop Testing Machines
• The drop condition of the test piece can be preset as a face, edge, or corner drop.
• The drop height can be preset, and the test piece will automatically be positioned when it reaches the set height.
• The operating mechanism is flexible, ensuring that the test piece is not disturbed by any external forces during release and free fall, and ensuring that it meets the required drop status.
• The structure of the drop testing machine is scientifically designed, with a safe and reliable inclined impact test platform.
• This machine can perform slanted platform impact testing for transport packaging to determine their impact resistance and the ability to protect contents, as well as free-fall tests for faces, corners, and diamonds.
7. Precautions for Drop Testing Machines
• It is important to ensure that the test piece is not affected by external forces during the falling process.
• Appropriate spacers should be used to ensure that the test piece maintains a horizontal position during the drop.
• When using the inclined test platform, the test piece must be placed on the appropriate end surface.
• When using the drop testing machine, the operating instructions must be followed.
• Maintenance and upkeep of the drop testing machine require careful and cautious operation to prevent damage.
• During drop testing with the drop testing machine, it is important to ensure that the test piece does not cause damage to the equipment and to prevent potential safety hazards.
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Spectrophotometer: Applications and Measurement Considerations
A spectrophotometer is an instrument used to measure the reflected spectral power and light characteristics of objects to determine their standard color values. However, measurement results can vary due to differences in color difference calculation methods and light source selection. Therefore, it is crucial to carefully select appropriate color difference formulas and light sources when using a spectrophotometer.
A spectrophotometer is typically used to measure color characteristics and reflectance of objects, providing various numerical values to describe the color and color difference of objects.
Here are the values that a spectrophotometer can generally measure:
• Tristimulus Values: Measures the reflected light intensity of objects at different wavelengths, calculating the RGB tristimulus values perceived by the human eye.
• Chromaticity Coordinates: Computes chromaticity coordinates based on measured tristimulus values, often represented as xyY or Lab coordinates. These coordinates describe color tone, brightness (xyY), and include lightness (L), red-green (a), and yellow-blue (b) components (Lab).
• L, a, b Color Indices: L value indicates brightness, a value denotes red-green, and b value represents yellow-blue in the Lab color space, quantifying color characteristics accurately.
• Color Difference: Measures color differences between samples, typically represented by ΔE (Delta E), reflecting the overall color difference between two colors. Additional values such as ΔL, Δa, Δb indicate brightness, red-green, and yellow-blue differences, aiding in assessing color similarity or variance.
These measurements and analyses assist in determining standard color, evaluating color differences, and adjusting color consistency during production processes. When using a spectrophotometer, it is essential to select appropriate measurement parameters and color spaces based on specific application needs to ensure accurate and reliable color measurements.
Components of a Spectrophotometer:
• Light Source: Utilizes standardized light sources like incandescent lamps, xenon lamps, or LEDs to illuminate the object under test, with stability and spectral characteristics affecting measurement results.
• Integrating Sphere: A spherical reflection cavity with highly reflective inner walls uniformly mixes and diffuses light reflected or transmitted from the sample, ensuring uniform light distribution, minimizing light source effects, and providing a stable measurement environment.
• Sensor: Captures light reflected or transmitted by the sample and converts it into electrical signals. Common sensor types include photodiodes or photodiode arrays detecting spectral information across different wavelength ranges.
• Detector: Receives electrical signals from the sensor and converts them into digital signals for computer or data processing unit analysis.
• Measurement/Observation Modes: Spectrophotometers are classified into “0/45 degrees” and “d/8 degrees” based on measurement/observation modes: “0/45 Degrees” measures surface reflectance with light incident at 0 degrees and detected at 45 degrees. “d/8 Degrees” measures transmittance and reflectance with diffuse light incidence and detection angles of 8 degrees.
• Spectral Analysis: Spectrophotometers analyze parameters and spectral curves across different bands, typically ranging from 380nm to 740nm, covering most of the visible spectrum. Different instrument models may have varying band ranges and resolutions.
The spectrophotometer plays a crucial role in both industrial and scientific fields, primarily used for measuring color differences between standard and test samples, providing color difference values and chromaticity values for analyzing and controlling color deviation issues to ensure product quality stability and consistency. In addition to these primary applications, the spectrophotometer has the following key uses:
• Color Matching: Spectrophotometers adjust product color matching by measuring color difference values, allowing for the precise adjustment of color intensity to match design requirements and ensure color consistency across products.
• Color Analysis: By analyzing sample chromaticity values, spectrophotometers provide detailed information about sample color attributes such as brightness, hue, and saturation, helping users understand and compare different sample color characteristics effectively.
• Whiteness and Yellowness Testing: Spectrophotometers measure whiteness and yellowness values of samples, assessing color purity and brightness, which is particularly important in industries like paper, coatings, plastics, and other color-critical applications.
• Color Quality Control: Spectrophotometers enable precise measurement and comparison of sample chromaticity and color difference values, assisting businesses in achieving color consistency control, promptly identifying and resolving color deviation issues to enhance product quality and market
DSCD-920_Desktop Spectroradiometer
Color Difference Assessment for Plastic Products:
• Linking Raw Materials and Production Processes: The color difference of plastic products is closely related to the quality of raw materials and production processes. Spectrophotometers help detect and quantify the impact of different raw material batches or production process variations on product color. This assists production personnel in adjusting raw material ratios and process parameters to minimize color deviation issues.
• Enabling Data-driven Analysis: Spectrophotometers quantify color parameters of plastic products, such as brightness (L), red-green value (a), and yellow-blue value (b) in the Lab color space, generating data that allows for comparison of color differences among different batches or production conditions.
• Ease of Use and High Precision: Spectrophotometers offer straightforward operation and high precision, facilitating rapid and accurate measurement of color differences in plastic products. Comparing color difference values between samples helps ensure color consistency and stability across products.
• Automatic Calibration and Practicality: Modern spectrophotometers often feature automatic calibration, ensuring measurement accuracy and stability. These instruments are highly practical, capable of stable operation in industrial production environments, helping businesses improve efficiency and reduce production costs.
• Enhancing Product Quality and Cost Reduction: Timely and precise measurement and analysis of color differences in plastic products using spectrophotometers assist businesses in enhancing product quality, reducing scrap rates caused by color deviations, lowering production costs, and enhancing competitiveness and market image.
Textile Industry Color Measurement Applications and Considerations:
• Dye Strength Measurement: Using spectrophotometers, standard dye stored in a database can be compared with newly purchased dye. By measuring the color characteristics of both, the percentage of dye strength of the newly purchased dye compared to the standard dye can be determined. This data is used to adjust production formulas to ensure dyeing quality meets requirements.
• Determining Product or Sample Suitability: Spectrophotometers can quickly and accurately determine whether produced products or samples meet design or customer-specified color standards. This rapid assessment helps businesses adjust production processes promptly to ensure product quality.
• Assessing Color Difference, Fade Resistance, Staining Resistance, Yellowing, Whiteness, and Brightness of Fabrics: Spectrophotometers can evaluate various aspects of color and quality in fabrics, including measuring color differences between fabrics, assessing fade and stain resistance, and measuring yellowing, whiteness, and brightness indicators. Compared to human observation, spectrophotometers provide more accurate and objective measurement results, particularly sensitive and reliable for detecting minor differences.
• Enhancing Production Efficiency and Quality Control: Through the application of spectrophotometers, businesses can achieve precise monitoring and control of dyes and product quality, promptly identifying and resolving production process issues, improving production efficiency, reducing waste rates, ensuring product quality stability, and enhancing competitiveness.
Considerations:
• Thin and Sparse Samples: If samples are too thin or sparse, layering multiple times until the measurement value stabilizes and remains unchanged is recommended. Avoid overly fragile samples to ensure measurement stability and accuracy.
• Small Sample Size: If samples are too small for direct measurement, consider using colored cloth as a backing or creating a black frame to secure the sample for measurement. A small hole slightly smaller than the sample size in the center of the frame allows for testing after calibration, ensuring measurement accuracy.
• Pile or Carpet Fabrics: For fabrics like pile or carpet with raised fibers, comb the fibers neatly and place optical glass on the fabric surface for measurement after calibration. If the entire fabric consists of the same type and batch of raw materials, testing can be conducted on the reverse side of the fabric.
• Yarn Color Measurement: For yarn samples, wrap the yarn neatly around a specialized yarn board before measurement. Pay attention to maintaining moderate tension during yarn winding and ensure consistent tension to avoid measurement errors and ensure accurate yarn color measurement.
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Thailand - Successful installation and operation for EMS-ISO7637 Multifunctional Immunity Test System For Automotive Electronics
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The Application of Chroma Meter in the Cosmetics Industry
The pursuit of beauty by humans will not change over time. Nowadays, this pursuit is reflected in various aspects of life, and the most common one is the “practical art” of makeup.
Based on this, the competition in the cosmetics industry is quite fierce. In order to capture customer requirements and showcase their creativity, the color of cosmetics is one of its intuitive and important evaluation criteria.
So the application of Chroma Meters in this industry is not something unexpected. Chroma Meters provide fast, accurate, and high-end solutions for controlling color quality. In order to develop visual characteristics that distinguish them from other products and make them more attractive to consumers in the fiercely competitive cosmetics industry, color design and application have been abandoned.
The color industry has summarized the “7-second law”, which means that consumers will determine their purchase intention within 7 seconds. So being able to grasp these 7 seconds is the appearance and color of the product, and the importance of controlling both is self-evident.
The early cosmetics industry is not well prepared for the problems faced by the color era, and has suffered many losses in color management. It can be said that many companies should be constrained by the bottleneck problem of color management in their development. But nowadays, color detection and control equipment and software are very complete. In cosmetics, color control, determination, and ensuring color consistency between batches no longer consume a lot of manpower, material resources, and time as before.
The cosmetics on the market are constantly emerging in terms of shape, form, and variety. Solid, powder, paste, liquid, and so on, using the same color difference meter for measurement poses very important technical and functional requirements.
We know that precision instruments such as colorimeters have many small parts that are damp and may cause damage to the internal parts. Therefore, it is not possible to directly measure creamy objects and liquids. In addition, the powder shape is irregular, and some cosmetics’ solids can also lose color and contaminate the aperture. Therefore, there are many details and methods to pay attention to when measuring cosmetics.
Most cosmetic colors are generated by reflection of light, such as eye shadow, lipstick, nail polish, etc. When white light shines on the surface of the product, the pigments in cosmetics will absorb the corresponding wavelength of white light and emit the remaining color light. When the remaining color light enters the eyes, it will stimulate the corresponding visual nerves, and we will produce the corresponding color sensation.
For the testing of such products, the reflection measurement position of the spectrophotometer should be selected for testing. During measurement, the light emitted by the instrument’s light source is scattered multiple times by the integrating sphere, and then shines on the surface of the tested sample. The light reflected from the sample surface is received by the instrument’s receiver, generating corresponding optical signals and converting them into electrical signals for computer processing to obtain color data.
What is Portable Colorimeter/Chroma Meter?
Portable Colorimeter/Chroma Meter is an innovation color measuring tool with powerful configuration to make color measurement easier and more professional; It support Bluetooth to connect with Android and ISO devices, Portable Colorimeter/Chroma Meter will take you into a new world of color management; It can be widely used to measure color value, color difference value and find similar color from color cards for printing industry, paint industry, textile industry, etc.
CD-320PRO_Portable Colorimeter/Chroma Meter
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Characteristics of a rapid temperature change test chamber
The rapid temperature change test chamber is suitable for “safety testing of electrical components and provides reliability testing, product screening testing”, and can also “improve product reliability and quality control” through this equipment,
Its test chamber is used as a commonly used testing equipment in fields such as aviation, automobiles, home appliances, and scientific research. However, it assesses and determines the parameters and performance of products such as electricians, electronics, automotive appliances, and materials, as well as their suitability for use when subjected to temperature and environmental impact changes during high and low temperature tests.
Design features of rapid temperature change test chamber:
The functions of the rapid temperature change test chamber include: high-precision system circuit, complete P.L.C locking treatment for any component action, and all use P.I.D automatic calculation control, resulting in high temperature control accuracy.
And it has advanced and scientific air circulation design to ensure uniform indoor temperature and avoid any dead corners; It also has comprehensive safety protection devices to avoid any potential safety hazards and ensure the long-term reliability of the equipment.
Structural characteristics of the rapid temperature change test chamber:
1. The rapid temperature change test chamber has a beautiful appearance, reasonable structure, advanced technology, and exquisite material selection. It also has simple and convenient operation performance and reliable equipment performance.
2. Adopting advanced measurement equipment and controller: adopting a large color LCD human-machine touch dialogue LCD human-machine interface controller, it is easy to operate, easy to learn, stable and reliable, and displays complete system operation status and execution and setting program curves in both Chinese and English.
With 96 independent test specifications, a shock time of 999 hours and 59 minutes, and a cycle cycle of 1-999 times, as well as the ability to set and achieve automatic operation of the refrigeration machine, automation can greatly reduce the workload of operators and automatically start and stop work at any time.
3. There is a 50mm diameter testing hole on the left side of the chamber that can be used to test components for external power load wiring.
4. The rapid temperature change test chamber is equipped with a fully automatic and high-precision system circuit, with P.L.C locking treatment for any component action. It adopts P.I.D automatic calculation control (with high temperature control accuracy) and advanced scientific air circulation design to ensure uniform indoor temperature. It avoids any dead corners and any potential safety hazards, while ensuring the long-term reliability of the equipment.
The functional characteristics of the rapid temperature change test chamber:
1. The structure adopts a design concept of no jacket and combination;
Having a simple appearance, ideal assembly method, compact chamber structure, and extremely convenient maintenance and use;
2. The outer shell is made of cold-rolled thin steel plate, with a surface sprayed with plastic, which is beautiful and durable; The inner liner is made of stainless steel plate with a flat and clean surface; The right side of the studio is equipped with components such as a circulation device, heater, and refrigeration evaporator; The top is equipped with a pair of blower motors to circulate cold and hot air in and out of the studio to ensure temperature requirements;
3. The sealing strip of the inner and outer doors is made of silicone rubber material, which is safe and non-toxic;
4. The rapid temperature change test chamber is equipped with two sealing devices with good sealing performance, and observation windows are set up for easy observation of the test situation of the sample;
5. The rapid temperature change test chamber adopts a touch digital display instrument, and has functions such as programming, curve display, PID self-tuning, and fault display;
6. The refrigeration system is installed on the right side of the main chamber, and the refrigeration unit adopts imported units with good performance, which are easy to install and reliable in performance;
7. Super strong safety protection functions: power overload protection, leakage protection, control circuit overload, short circuit protection, compressor protection, grounding protection, over temperature protection, alarm sound prompt, etc;
8. Customization and changes in model and technical parameters can be designed based on the user’s sample size, the size of the sample, and specific experimental requirements.
The rapid temperature change & humidity heat test chamber is a temperature and humidity test device, applied for aerospace products, information electronic instruments, electrical, electronic products, and various electronic components to test various products under the condition of rapid temperature change performance.
KWB-054D Rapid temperature change & humidity heat test chamber
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Choosing the Right Color Measurement Device: Portable VS Benchtop Spectrophotometers (Benchtop Transmittance Spectrophotometer)
There are many different brands of color spectrophotometers on the market, and even within the same brand, there are multiple products available. The handheld and desktop types are the most popular categories, but what are the differences between these two types?
Portable Colorimeters – also known as Portable spectrophotometers
Can directly read data and connect to a computer through software: Small size, convenient to carry, high accuracy, and moderate price. Easy to operate, even ordinary personnel can easily handle it.
Desktop Colorimeters – also known as Benchtop Transmittance Spectrophotometer: Equipped with a reading window, used with color matching software when connected to a computer, has high accuracy color matching function, large size, stable function, and high price.
As we all know, Benchtop Transmittance Spectrophotometer are more accurate and consistent than portable devices. When using strict tolerances or setting color specifications, desktop devices are usually the preferred choice. Professionals working with brand colors or components of their products must match each other in the final assembly process, using desktop devices to set specifications, formulas, and quality control. On the other hand, portable colorimeters are more suitable for spot checking product quality as they are easy to carry around.
Portable VS Benchtop Spectrophotometers:
If you want to measure liquids such as orange juice, laundry detergent, or shampoo, please choose a Benchtop Transmittance Spectrophotometer; Benchtop Transmittance Spectrophotometer are also the preferred choice for setting color formulas. They are suitable for controlling fluorescence and fluorescent whitening agents in paper, textiles, plastics, pigments, and paints. Using automatic instrument settings eliminates the possibility of speculation and errors during instrument configuration.
Portable colorimeters are convenient to carry around and can be used for quality control in the laboratory. They are widely used in industries such as plastics, printing, and metal spraying for quality inspection and monitoring.
They are compact, handheld, simple, and inexpensive instruments, but still effective for specific purposes. In a Benchtop Transmittance Spectrophotometers, a specific light source (such as A or D65) illuminates the object. The reflected light passes through primary filters: red, green, and blue, which simulate the spectral sensitivity curve and reach the detector, where it provides a response proportional to the three-stimulus values. Therefore, colorimeters provide information about the amount of red, green, and blue light reflected by the object. This color information is useful for color evaluation that does not require complexity or accuracy. For example, colorimeters are very useful in production environments where measuring color differences between products and standards, or between production batches, is important. It can also be compared to color charts for evaluation purposes.
Benchtop Transmittance Spectrophotometers are more complex and accurate color evaluation devices than colorimeters. They are used for color quality control in processes that require higher accuracy, such as research labs, color formulas in paint and cosmetics companies, etc. Spectrophotometers can be handheld, with a compact and user-friendly design, suitable for industrial environments on the product line. Or they can be desktop spectrophotometers that require a more comprehensive understanding of the user, but offer greater versatility. Generally, handheld spectrophotometers or handheld measurements are used to measure opaque solid objects, while desktop spectrophotometers can be used to measure the color of opaque solids, semi-transparent solids, and liquids.
DSCD-910_Benchtop Spectrophotometer (Transmittance)
Benchtop Transmittance Spectrophotometers used for color evaluation measure the reflection or transmission radiation of the entire visible spectrum. To do this, a monochromatic radiation is used to illuminate the sample or object (spectrophotometers have monochromators, filters, or prisms that can distinguish wavelengths), and the amount of reflected or transmitted radiation is recorded.
Benchtop Transmittance Spectrophotometers are very common instruments used in color measurement. They are widely used in areas such as color evaluation, color control, color matching, and material composition analysis. As a precision instrument for color measurement, its working principle is to use a spectrophotometer to display the ratio of the spectral composition and diffraction curve of a graph and calculate the measured value accordingly. It automatically records the data measured by the spectrophotometer, and then calculates the measurement result automatically. In addition to the microprocessor and related circuits, the spectrophotometer has four main components: light source, integrating sphere, grating (monochromator), and photodetector. Different models of spectrophotometers have different components, which affect the accuracy of the measurement results.
Spectrophotometers, as precise measurement instruments, have a unique measurement method that is not complicated. It mainly consists of four steps:
1. Calibration
In actual use, calibration is required to ensure accuracy. There are two calibration methods: one is to use standard samples to calibrate, and the other is to use raw data from the light source for calibration. Calibration can ensure that the spectrophotometer has consistent standards under different test conditions.
2. Sampling
Before testing, a sample of the object needs to be taken. This step usually requires taking a small piece from the surface of the object while avoiding contamination and damage to the sample surface as much as possible.
3. Measurement
Before measuring, the sample needs to be fixed on the spectrophotometer according to the requirements. Then, using the instrument’s built-in operating interface, input the required measurement items and illuminate the sample with the light source. After a certain test time, the test data is recorded.
4. Analysis and Results
After obtaining the measurement data, it is necessary to perform analysis and statistics and further processing based on the analysis results. For example, by calculating the color difference value, the level of color difference from the standard sample can be determined, thereby determining the color accuracy.
As a highly precise color inspection device, spectrophotometers can detect the “reflectivity curve” of each color point, which cannot be achieved by many simple color difference meters. In addition, spectrophotometers can simulate multiple light sources, allowing you to perform color difference calibration work in the designated light source box specified by the inspection company.
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Unleashing the Power of Surge Generator: Essential Techniques for Surge Suppression
I. Introduction of Surge Generator
Surge generators are important equipment in electrical systems. Their main function is to simulate high-voltage pulses or instantaneous voltage fluctuations to test and evaluate the effectiveness of different surge suppression systems. These high-voltage electrical devices mainly serve to prevent transient voltage fluctuations from damaging electrical systems, thus safeguarding production.
Surge generators play a crucial role in measuring the suppression capabilities of electrical systems. They are able to generate high-voltage pulses to simulate lightning strikes or other sudden high-voltage current events, testing the efficiency and reliability of suppression systems. If these suppression systems cannot withstand these high-voltage pulses, it means that they are unable to effectively protect the electrical system, which may lead to production interruptions and equipment damage. Therefore, surge generators are essential tools for ensuring that electrical systems can withstand high-voltage pulses.
LISUN SG61000-5 is an automatic surge generator (also called lightning surge immunity test, combination wave generator, surge current generator/surge voltage generator, combined surge voltage and current generator) .
The SG61000-5 surge generator provides a common basis for evaluating the resistance of power cords and internal connectors of different equipment to high energy transient interference caused by natural lightning surge induction and large capacity load switching. It fully meets the IEC 61000-4-5, EN61000-4-5 and GB/T17626.5 standards.
Surge Generator SG61000 5
II. Understanding Surge Suppression
In the process of surge suppression, protective measures are used in order to decrease the impact that voltage spikes have on electrical infrastructure. These surges might be caused by a number of different things, including electrical grid oscillations, lightning strikes, or switching events.
By diverting or absorbing excess electrical energy, the purpose of surge suppression is to safeguard sensitive electronic equipment from any potential damage that might result.
III. Role of Surge Generators in Testing
Surge generators are an important piece of equipment for use in the testing of novel ways of surge suppression. They imitate the consequences of real surges by generating voltage transients in a controlled and repeatable manner, thereby making the simulation more accurate.
It is possible to recreate a broad range of surge circumstances in the actual world by fine-tuning the amplitude, duration, and waveforms of a surge generator’s output. With the assistance of these simulated surges, surge suppression devices and systems may be put through their paces and potentially enhanced.
The information that surge generators give, which details the interplay between surge currents and voltages and surge protection systems, may be of considerable use to professionals and may provide them with significant benefits.
In the process of repeated testing and analysis, surge generators make it possible to identify weaknesses in surge protection systems, which paves the path for the systems’ subsequent refinement and enhancement.
IV. Best Practices in Surge Suppression
When putting surge suppression strategies into action, it is essential to follow industry standards for best practices to provide optimum safety. Some essential methods include:
Comprehensive Risk Assessment: With the assistance of a thorough risk assessment, it is possible to identify potential surge sources and weak regions in the electrical system. As a result of this research, surge protectors may be positioned more effectively, which ensures the greatest possible degree of safety.
Multiple Protection Levels: use a number of surge protection devices simultaneously as opposed to just one single unit. The first line of defense is located at the service entrance, the second line of defense is located at the distribution panels, and the third line of defense is located at the sensitive equipment. Each tier provides an additional line of protection against unwelcome voltage surges that have the potential to cause costly equipment to malfunction.
Surge Diverter Placement: It is necessary to strategically position surge diverters in order to properly suppress surges. When the diverters are placed as close to the equipment that they are shielding as physically possible, the suppression is able to function at a higher level of effectiveness.
Grounding and Bonding: By ensuring that the grounding and bonding of every component of the electrical system is done properly, the risk of surges is decreased, and any excess energy is securely redirected. Equipotential bonding, grounding electrodes, and grounding conductors are all crucial components in the fight against surges.
Regular Maintenance and Testing: Maintenance and testing of surge protection devices and surge generator systems should be performed on a regular basis to ensure that they remain effective. Conducting visual inspections, testing surge protection devices, and testing surge generators on a consistent basis are all required in order to ensure that the system is operating as efficiently as possible.
V. Surge Generator Advancements
The evolution of technology for surge generators has led to the development of ever more sophisticated techniques of surge suppression. In today’s surge generators, you may find a variety of contemporary conveniences, such as programmable waveforms, increased surge energy capacity, and built-in monitoring, to name just a few.
As a result of these improvements, surge suppression strategies may now be assessed over a larger range of surge scenarios, with more accuracy and a higher level of complexity.
Protectors against surges that also record data make it possible to analyze the impacts of surges and how they affect the devices that are shielded from them. Having this information enables more accurate surge protection measures as well as improved performance across the board for the system.
VI. Conclusion
The role of surge generators also lies in providing protection for other types of electrical equipment. They can simulate various surge voltages that different electrical equipment may encounter in real production environments, testing whether the equipment can operate normally under these conditions. These tests can help electrical engineers identify weaknesses in equipment and take measures to strengthen their ability to withstand high-voltage pulses, thus ensuring the reliability and stability of the electrical system.
Surge generators can also be used to evaluate the actual effectiveness of different suppression systems. By simulating different levels of surge voltage and comparing the suppression capabilities of different systems, electrical engineers can identify the most effective suppression system and make improvements and optimizations. This helps to improve the efficiency and reliability of the suppression system, enabling the electrical system to better cope with sudden high-voltage pulses.
Electrical industry experts have a responsibility to stay current on the most recent developments in surge generators and ways for reducing surges in electrical systems. It is possible to protect electrical systems from the potentially catastrophic effects of voltage surges by testing and putting into practice effective methods of surge suppression. However, in order to do so, one must have an understanding of the role that surge generators play in this context.
In conclusion, surge generators are really beneficial equipment that may be used in the field of surge reduction. They may be used by trained professionals for the purpose of testing and enhancing surge protection systems and devices, as well as for fine-tuning suppression strategies.
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Damped Oscillatory Wave Immunity Tester: Key Technology for Damped Oscillatory Wave (DOW) Testing
What is Damped Oscillation:
Damped oscillation is a type of non-harmonic motion commonly seen in systems such as spring oscillators and pendulums. It is a vibration in which the amplitude gradually decreases over time due to the presence of factors such as friction and resistance, also known as damping. The vibrating system continuously overcomes external resistance and consumes energy, causing the amplitude to decrease until the vibration eventually stops. This energy-decreasing vibration is called damped oscillation. Unlike harmonic oscillation, damped oscillation is non-periodic. Damped oscillation systems belong to dissipative systems, and their damping properties can be quantitatively represented. Damping also includes any influence and cause of energy decay in the vibrating system. Therefore, damping can be caused by external forces or inherent characteristics of the system. In summary, damped oscillation is a special vibration phenomenon in which energy gradually decreases.
Damped oscillation is caused by external resistance and can be used in practical applications to control the amplitude and frequency of vibration. So, what are the factors that affect the amount of resistance?
• Firstly, the resistance of the medium is one of the crucial factors influencing damping in oscillations. This resistance is related to the medium’s density and viscosity, and the larger the density and viscosity, the greater the resistance, causing the vibration to decay faster.
• Secondly, external friction is also an essential factor in creating damping. In spring oscillators, we often use air resistance to achieve damping. When the oscillator vibrates, air resistance converts the vibration energy into heat, thereby reducing the amplitude.
• Another factor is structural damping. In structural damping, components of the vibrating system may come into contact and create friction, consuming the vibration’s energy and hindering its progress.
• Finally, the magnitude of friction also affects damped oscillations. In pendulum systems, friction primarily comes from the contact between the pendulum and the pivot point. By increasing friction at the pivot point, we can effectively control the amplitude and frequency of oscillation.
In summary, the occurrence of damped oscillation is due to external resistance. By manipulating different factors to control the amount of resistance, we can influence the decay rate of vibration. In practical applications, we can use damping to control the amplitude and period of vibration, achieving a more stable and controllable effect.
DOW61000 18_Damped Oscillatory Wave Immunity Tester
Feedback signal of Damped Oscillatory Wave Immunity Tester:
The feedback signal is generated through a damped oscillation circuit. This circuit is composed of a power amplifier and load resistor, and the output signal of the power amplifier is fed back to the input end of the generator through the load resistor, creating a feedback loop. When the load resistor changes, the signal waveform also changes accordingly, thereby affecting the power output of the power amplifier. As a result, the damped oscillation circuit connects the output power with the feedback signal, allowing for control of frequency and power.
Damped Oscillatory Wave Immunity Tester can produce a Damped Oscillatory Wave (DOW) Testing instrument that simulates power equipment, passing through different types of cables such as power cables and control and signal cables in high-voltage and medium-voltage substations. It can also simulate non-repeating damped transient waves that occur in low-voltage power lines, control lines, and signal lines in public and non-public networks. The use of an oscillation wave generator can accurately assess the resistance to disturbance of electronic equipment and provide reliable standards for electrical and electronic equipment for residential, commercial, and industrial purposes. The oscillation wave generator is also referred to as the oscillation wave resistance test instrument, including damped oscillation wave generators, attenuated oscillation wave generators, and resonant wave generators, which simulate oscillation waves in actual settings to provide accurate data for the working environment of electronic equipment.
The main purpose of the Damped Oscillatory Wave Immunity Tester is to evaluate the resistance to disturbance of electronic equipment, ensuring its normal operation. In various types of electrical equipment, oscillations may cause equipment failure or damage, so the requirements for resistance to disturbance are very stringent. Using an oscillation wave generator can accurately simulate the oscillation waves that occur in real-world scenarios and evaluate the equipment’s resistance to these waves. This scientific evaluation method can provide data support for manufacturers to improve product design and improve product quality and stability.
The Damped Oscillatory Wave Immunity Tester plays an important role in the field of electrical and electronic equipment, providing accurate and reliable data support for the design and production of electronic equipment to ensure its proper operation. With the continuous development of technology, the oscillation wave generator is also continuously improving and advancing. More and more businesses and manufacturers are beginning to pay attention to the testing of equipment’s resistance to disturbance, thereby improving product quality and meeting customer demand.
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A Deeper Study - Coupling and Decoupling Networks: What is Coupling and Decoupling Technology
What is Coupling and decoupling?
Coupling is the energy exchange linkage between two circuits or two parts in one circuit, enabling energy to be transmitted from one circuit to another or from one part to another. Decoupling is the prevention of energy feedback from one circuit to another, to avoid unpredictable feedback reactions, resulting in abnormal operation of the next level amplifier or other circuits.
Analyzing further the working principle of the coupling-decoupling network:
By separating noise from the circuit with the coupling-decoupling network, the signal can be made cleaner and more stable. The coupling-decoupling network is composed of two capacitors and one inductor. The two capacitors are responsible for separating the high-frequency signal from the direct current signal, and the signal is separated through the inductor. When the high-frequency signal passes through the inductor, the bias voltage will change, thus changing the amplitude of the voltage on this basis. In short, the high-frequency noise is separated from the direct current signal. Through coupling and decoupling networks, the influence of high-frequency noise disturbing the transmission of circuit signal can be effectively blocked.
Its advantages are ease of use, small size, and good performance. By adding a capacitor to the signal line of the circuit, the capacitor can bypass the high-frequency noise signal to the ground line, and a capacitor is used to isolate the DC signal, thereby realizing the transmission of the signal. In short, the coupling and decoupling networks technique separates the DC signal from the high-frequency signal in order to remove noise interference. Capacitors can be used to divide the DC signal from the high-frequency signal, and the inductor can separate the high-frequency signal from the DC signal, thus achieving the effect of eliminating noise interference.
How is the inductor used in the coupling and decoupling networks?
The inductor is used in the coupling-decoupling network to separate the high-frequency noise signal from the direct current signal. It has high impedance characteristics to high-frequency signals, which allows it to separate the high-frequency noise signals, while the direct current signals can pass through it smoothly to the next circuit. By adding the inductor to the coupling and decoupling networks, the high-frequency noise signals can be effectively separated from the direct current signals, thereby ensuring that the direct current signals are transmitted cleanly.
The role of the coupling and decoupling networks:
The main function of the coupling network is to transmit the surge signal of the synthesized wave generator (such as the surge generator) to the test unit (EUT) without damaging the protection generator itself, reducing the impact on the surge waveform. The decoupling network provides sufficient decoupling impedance for the surge signal to prevent the surge from entering the power grid and affecting the normal operation of non-test devices.
CDNE-M316_Coupling Decoupling Network
The role of the coupling and decoupling networks in surge immunity tests:
Using the coupling-decoupling network can effectively transmit the surge signal from the synthesized wave generator to the circuit of the test device, preventing the synthesized wave generator from being damaged, and reducing the influence on the surge waveform. At the same time, decoupling network can provide good decoupling impedance effect, effectively preventing the surge from entering the circuit and causing a negative effect on other devices, such as surge arresters. Therefore, by using the coupling and decoupling networks, good surge immunity can be achieved.
The structural design and circuit parameters of the coupling and decoupling networks(CDN):
There are many ways to realize the coupling network, such as capacitive coupling and gas discharge tube coupling, but since the gas discharge tube coupling significantly affects the output waveform of the synthesized wave generator, capacitive coupling is more common. In view of the relationship between output signal efficiency and residual voltage, the national standard stipulates that 18 μF capacitance is used for line-line coupling (differential mode) and 9 μF capacitance is used for line-ground coupling (common mode). When line-ground coupling, in order to ensure the virtual impedance (defined as the ratio of open circuit voltage peak-to-peak and short circuit current peak-to-peak), an additional resistance of 10Ω should be serially connected to increase the effective source impedance.
The decoupling network consists of an LC low-pass filter (decoupling inductor L and decoupling capacitor C) which can effectively stabilize the voltage at the EUT side. The equivalent circuits of line-ground and line-line decoupling networks are: Rs and R′s are the source resistances of the surge source, Rs=12Ω, s=2Ω respectively, making the voltage transmission function properly changed, so as to more effectively stabilize the voltage at the EUT side.
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