About Test Chamber

What should you do if the constant temperature and humidity test chamber is stopped for a long time? Due to special conditions, the constant temperature and humidity test chamber needs to be stopped for a period of time, some protective measures should be taken. The specific methods are as follows:(1) When the constant temperature and humidity test chamber is out of service, the contents in the chamber should be taken out, the power plug should be unplugged, and the inside and outside of the test chamber should be cleaned.(2) Use paper strips to pad between the door seal and the chamber body to prevent the door seal from sticking to the chamber body; if you plan to not use it for a long time, you can also apply some talcum powder on the door seal.(3) The test chamber must be placed in a dry and ventilated place to avoid direct sunlight. After the position is moved, the test chamber should be kept stable.(4) The indoor air has a certain degree of humidity, so do not cover the test chamber with a plastic bag. Moisture is not easy to be distributed, which will cause metal parts to rust and damage the performance of electrical components.(5) The freezing temperature of Freon used for refrigeration in the constant temperature and humidity test chamber is very low, so there is no need to worry about it freezing and place the test box in a higher temperature place.(6) If possible, it is best to switch on the power once a month, so that the compressor will run normally for half an hour to one hour and then turning off.

How to clean and maintain the constant temperature and humidity chamber in daily work? 1. Cleaning and maintenance of the inside and outside of the constant temperature and humidity chamber.① The internal impurities of the constant temperature and humidity test chamber should be removed before operation.② The power distribution room should be cleaned at least once a year. When cleaning, a vacuum cleaner can be used to remove the indoor dust.③ The exterior of the cabinet must also be cleaned more than once a year, and wipe it with soapy water before cleaning.2. Inspection and maintenance of humidifier with constant temperature and humidity chamber. The water storage in the humidifier should be replaced once a month to ensure that the water is clean, and the humidification water tray should be cleaned once a month to ensure smooth water flow. 3. Removal of dust from the condenser of the constant temperature and humidity chamber. The condenser should be cleaned regularly and maintained monthly. Use a vacuum cleaner to suck out the dust attached to the condenser's heat sink or use high-pressure air to spray the dust.4. Replacement of the wet bulb test cloth in the constant temperature and humidity chamber When the surface of the test cloth is dirty or hard, or after the temperature control is completed, the test cloth must be replaced before the temperature and humidity sphericity control is continued. The test cloth should be replaced once every three months, and the temperature measuring body should be wiped with a clean cloth when replacing it, and the temperature measuring body should be cleaned first when replacing the new test cloth.5. Check the wet bulb water level of the constant temperature and humidity chamber and adjust the water level of the water tank not to be too high, so that the water overflows the water tank or is too low, so that the wet bulb test cloth absorbs water abnormally, affecting the accuracy of the wet bulb. The water level remains about six minutes full. That's it. The water level of the water tank can be adjusted to adjust the height of the water tank.

Specification for maintenance of rain test chamberWe would like to introduce some Maintenances of Rain Test Box as follows:1.     Please check the water tank has enough water before operation, If not, please fill it avoid damaging the dump.2.     Please stopped it once you heard some noisy, and rebooted after the trouble is solved, in order to avoid influence the service life of the equipments.3.     It should be kept dry when the equipment is in nonworking condition. Please drain away water of the chamber and drying the chamber.4.     After the equipment runs for a long time, if the nozzle is blocked, the pipe must be removed, washed with tap water, and then assembled;5.     Avoid external force impact equipment;6.     Chemical exposure to this equipment shall be prohibited;7.     Check the circuit control system before each start.8.     Ventilation fans should be installed in the laboratory to maintain ventilation;9.     Check the Power supply and ground Wire10. Whether the power wire is properly connected to the specification and is truly grounded11.  The waste water discharge system of the equipment must be installed in place12. After the test, the power supply of the whole machine will be cut off;13. After test, the sample should be removed and the equipment should be cleaned.If you want to know more information (some guidance or user-manual), please feel free to contact with manager@climatetester.com.

Altitude Chambers - Altitude/Humidity/Temperature Test ChambersAltitude simulation testing is important for manufacturers of products that might be shipped via air. It is especially important for defense and aerospace applications where pressure and vacuum conditions are even more intense. CLIMATE INSTRUMENT altitude/temperature and altitude/temperature/humidity chambers offer performance flexibility and reliability for today's mixed-environment testing requirement. Our altitude test chambers control the temperature environment for testing your product while simulating various altitude environments from site level to 100,000 feet. The same chamber can be used to simulate temperature and humidity.If you are interested in CLIMATE Test Chamber, please feel free contact us :Our Email and Tel :manager@climatetester.com / 18680067830

Dust&Sand Test ChamberTemperature and humidity are not the only environmental conditions that products need to be tested to.Climatetester has developed advance designs to realize testing for additional conditions that products may be affected by.Dust testing is one of such designs. Dust Chamber Sounds simple enough, just build a cabinet that creates a continuous environment of dust. However, there are many details to consider.  The floor of the chamber is an inverse pyramid. At the tip of the cone, an air nozzle lets in compressed air.The cone is filled with dust. A wire shelf above the floor holds the part under test.A window and rubber gloves thru the door allow the parts to be turned to ensure even exposure without opening the door.Special considerations were made to ensure that the dust is continuously dispersed and not accumulating on the floor.The compressed air is dried to keep the dust from clumping. And a special clamshell type door is used for easy loading.

Why test drive systems and materials in extreme cold?Patrolmen in our areas are often much busier once the winter really kicks in and temperatures drop. Engines and other car components really suffer in low temperatures and sometimes end up breaking down. Although this is peanuts compared with what machinery and vehicles are faced with in extreme climates. How do people deal with this?In countries such as Finland, Sweden, Norway, Canada, China, Mongolia and Russia, where the temperatures regularly fall below 0°C, sometimes even to extreme levels of -40°C or -50°C, much more attention must be paid to such conditions and so the design of the machinery must always be optimised in order to continue operating. Therefore the drive systems and materials used on the machinery must be able to operate properly in such extreme conditions. It is therefore necessary to carry out tests at the same extreme conditions in order to determine the levels of reliability and robustness of the machinery in similar circumstances.  Vehicles and other machines must be able to start up and remain running at extremely low temperatures. Continued operations in these extremes of temperature (from -30°C to even -60°C at some locations), can only be guaranteed if this is taken into account early on in the design stage and also at the end of the production development cycle. This is done by carrying out thorough validation tests. This is why sectors such as mining and quarrying and the off-highway industry always have their products tested under extreme conditions in climatic test chambers. The typical tests carried out on such machinery include the cold start tests, testing the heating and cooling systems in a variety of climatic conditions, testing the functioning of hydraulic systems in extreme cold, testing the functionality of the windscreen de-icing systems (ice testing) and making inspections for breaks and leakages in joints and seals that focuses on preventing leakages.  Engines, drive systems, after-treatment systems and cold startingEngines and drive systems must generally be able to start up and do their work in all circumstances. The search for reduced fuel consumption has resulted in modern engines running more smoothly at higher compression ratios, with the combustion occurring at higher temperatures. This has resulted in relatively low CO and HC emissions, but higher emissions of NOx. In order to deal with the higher NOx emissions, so-called 'after-treatment systems' are deployed, although cold starting still remains a problem. These after-treatment systems are fitted as standard on off-highway and construction vehicles, and they are also used in the energy sector for making diesel generator sets more sustainable.Actual working situations have all too often demonstrated performance levels that differ from the anticipated performance. After-treatment systems are used to prevent high levels of NOx emissions. Various technological solutions are being tested (read more about this in this blogpost). NH3/urea SCR for example is a very effective and widely applied technology for reducing NOx levels in diesel engine exhaust fumes. The problem with NH3/urea mixtures is that it normally freezes around -11°C, therefore tests have to be carried out to find out whether such systems can continue operating in the winter without causing damage to the environment.In order to obtain the best results it is essential to test the complete vehicle or machine. Testing the complete set-up is the best way of collecting data about the general environmental suitability and operational sustainability of the machine so that potential problems of interference between the various subsystems can be detected. This makes it possible to evaluate the subsystems from the various manufacturers together and therefore identify installation faults or other difficulties before production begins. Engine builder MTU carried out tests on its engines at the extremely low temperature of -25°C for example. A climatic test chamber allows designers to carry out tests in controlled conditions into how easy, or difficult it is to start the engine at various temperatures. The test engineers altered the pressure, the volume and the timing of the fuel injection system in order to improve the starting characteristics. The test data is used for programming the engine management system and provide the engine with suitable start settings based on external ambient and coolant temperatures, while taking account of improvements to the lifespan and sustainability. Such tests are valuable for vehicles and machinery used in mining activities in places like Siberia and Canada where the temperatures can drop to Arctic levels of -60°C. Polar diesel is used there which has a kerosene content of 60 percent that makes it substantially less viscous than the standard winter diesel fuel. This is why the injector settings have to be altered in order to prevent the very thin fuel causing them damage. An air grill is fitted in front of the radiator to ensure that the engine is not over-cooled. The grill closes whenever the temperature drops too low. This means that the engine can always be started even with extremely low external temperatures. The engine management system automatically adjusts the volume of fuel and the injection timing in order to match the air temperature. Depending on the ambient temperature, a pilot injector located on top of the main injector can be activated during the starting routine.Sirris is also involved in this area and our facilities at the Port of Antwerp is one of the only technology centres in Europe to have a large climatic test chamber for testing such vehicles and machinery at Siberian temperatures. The climatic test chamber is unique in that it is possible to test machinery weighing up to 150 tons at -60°C. This is quite different from many other climatic test chambers for cars where the weight and temperature levels are not suitable for this niche market.   Materials and cold work conditionsIt's not just fuels and hydraulic fluids that react differently at extremes of temperatures, because materials used for making engines and components are also affected. For example, bearings can suffer problems on starting up caused by differences between internal and external temperatures. The combination of cold, brittle materials and vibration can lead to even more problems. As well as metals, synthetic and rubber materials also behave differently.  For example synthetic hoses for hydraulic circuits lose their flexibility at low temperatures by initially becoming leathery, then hard, stiff and brittle once the 'glass point' has been reached. The use of an elastomer for low temperatures depends on this point. At or below this temperature pressure, tension or impact on the synthetic material will damage or break it. Moreover, elastomers can degrade when exposed to thermal cycles. However, when the elastomers are treated with additives for resisting low temperatures, problems can arise when the temperature increases (the additives start to leach), so that the performance is reduced when the temperature is lowered once again. Large climatic test chamber for eliminating risks The availability of a large climatic test chamber with substantial dimensions, weight capacity and an extensive temperature range is essential for testing materials being used such as engines, drive systems and after-treatment systems on large vehicles or other machinery that is exposed to extreme conditions. In addition to the subsystems, the best results can only be obtained by testing the complete vehicle or machine. Therefore Sirris offers a specially adapted set-up and a unique testing infrastructure for companies involved in sectors including off-highway, construction and agricultural vehicles, wind energy applications, energy transmission systems, aerospace, defence, etc.The climatic test chamber is mainly used for testing very large and heavy wind turbine components including gearboxes, converters and transformers at extreme temperatures. The chamber was designed with a number of unique features, such as the large dimensions (10.6 m x 7 m x 8 m), extreme temperature range (-60°C to +60°C), 150 ton weight capacity and a facility for compensating 250 kW of heat at -20°C.Since last year the laboratory has been able to carry out air humidity tests with a range of ± 2% RH to ± 95%. Regarding the off-highway and construction vehicles market, the laboratory has also invested in the ability to test IR sunlight up to a density of 950 W/m², so that it can carry out tests on the cabs of large vehicles in accordance with ISO 14269-3 and ISO 10263-6 HVAC.

What to do to solve possible problems due to climatic changes and guarantee greater reliability of the product?The apparently simple answer, would be to test the product in all its conditions of use, but this can only be done if you have a room for environmental tests.Inside an environmental test chamber, specific temperature and humidity conditions can be recreated in order to verify reliability, durability or resistance to atmospheric agents.The use of an environmental test chamber helps to detect potential defects to be corrected before the production phase.

How to operate the salt spray chamber step by stepFor Salt Spray test chamber the steps in the test process are quite rigorous, this’s for ensuring the accuracy of the test results. Interpretation of the test steps of salt spray test chamberFirst: connect the power cord, air pressure pipe, then open the lid and pour pure water or distilled water into the tank , until the lamp of low water level on the panel is turned off, otherwise will not be able to Normal work.Second: the test chamber’s drainage pipe and exhaust pipe need to be connected, then add water to isolation tank, to avoid leakage of salt spray.Third: When everything is ready, you can press the power switch to turn on the power, and then press the running switch, the temperature of the test chamber and the temperature value of the saturator set, the setting method only on the control panel Two CNC instruments were assigned to the profile, set the required temperature value, to be set before the file to the measurement file, under normal circumstances the test temperature should be set to 35 ℃, the saturation temperature is set to around 38 ° C.Fourth: salt spray test chamber on the right side of the over-temperature protection control value is generally set at 55 ℃, to prevent the temperature control instrument failure and burn the box. When the working room temperature exceeds 55 ℃, over-temperature protection will automatically cut off the total power supply, the user should not arbitrarily transfer the protector.Fifth: poured salt water into the saltwater tank, the wet ball cups to add water, wet bulb thermometer cover gauze, and place of gauze in the wet ball cup.Sixth: the sample on the shelves, and set the experimental requirements of the angle, through the control instrument on the test parameters related to set, and then press the power, operation keys, etc., you can start the test.

General Maintenance of Temperature Test ChamberReminds customer to maintain the temperature test chambers regularly.1、Every 3 months to clean the condenser, the use of air-cooled compressor cooling, should regularly check the condensing fan and the decontamination dust to ensure its good ventilation and heat transfer performance. For the use of water-cooled compressor cooling, in addition to the need to ensure its water pressure and water temperature, but also must ensure that the corresponding flow, and regularly clean the inside of the condenser cleaning to obtain its sustained heat transfer performance.2 、Adhere to the professional management of professional maintenance, conditional units should be sent from time to time to the supplier factory training and learning to get more professional maintenance, maintenance experience and ability.3 、High and low temperature test chamber General We recommend that it be placed at a temperature of 8 ℃ ~ 28 ℃, do not have this condition of the laboratory, to be equipped with the appropriate air conditioner.4、 Regular cleaning of the evaporator: due to the cleanliness of different samples, in the forced wind circulation on the evaporator will gather a lot of dust and other small particles, should be cleaned regularly.5、 Long-term shutdown is not used when the product should be regularly every half of the electricity, power time is not less than 1 hour.6 、Circulation fan, condenser fan cleaning and balance similar to the cleaning evaporator, due to exquisite thermal test chamber work environment varies, the circulation fan and condenser fan will gather a lot of dust and other small particles, should be regularly cleaned.7 、Water and humidifier cleaning: If the waterway is poor, humidifier scaling easily lead to humidifier dry, may damage the humidifier, so the water and the humidifier must be cleaned regularly.8、 Adhere to the end of each test after the temperature set in the vicinity of the ambient temperature, work for 30 minutes or so after the cut off the power, and clean the studio wall.If you are want to know more, please feel free to contact us :Our Email and Tel :manager@climatetester.com / 13829267288

5 Important Considerations for Starting a New Testing ProjectPlanning for a test chamberThe world today continually demands new and innovative solutions to real‐world problems. In 1940, we began a journey that has provided us the opportunity to be a part of the innovation process for many companies across many industries. While the products and processes have changed, the need for providing quality products and solutions to your customers has remained as steadfast as ever.We are honored to be able to provide environmental test chambers a part of, not only the research and development process, but also the design verification and validation processes. This insight has granted us a unique viewpoint of the development process and given us the opportunity to share 5 considerations which are critical to any new testing project.Material Type:If you are considering buying an environmental test chamber, you already know different materials respond to heat and cold differently. But consider how each of those materials will retain the temperature after the chamber switches to the opposite cycle of heating or cooling. If they are good conductors, they will likely absorb and release temperature stresses more quickly. If not, they may need to soak much longer to stabilize at a set point. This will have an immediate impact on your chamber temperature change rates, length of test, and chamber performance.By discussing the material types that are used throughout the product being tested with the environmental test chamber manufacturer, their engineers can help compensate for these variances by adjusting the refrigeration type, system size, compressor power, and airflow inside the chamber. In some cases special modifications can be made to the test chamber itself to add additional efficiencies and performance that can improve the entire testing project.Outgassing:Some materials will release flammable gasses when they are subjected to extreme heat. If any of these materials are present in your product and they release gasses into the chamber they could cause a volatile reaction when the gas passes the ni‐chrome heating element used to warm the chamber.Ni‐chrome heating elements can have an operational temperature range in excess of 2000°F. The air inside the test chambers will come in direct contact with these elements, and in some cases, if flammable gasses are present in the airstream a volatile reaction could occur. The reaction can be so intense that the test chamber could rupture, potentially causing harm to people or property near the chamber. If planned properly, steps can be taken to alter the design of the chamber or the test procedure to accommodate for this unlikely, but very possible event.Live-Load:If you have a test requirement that demands that the DUT (device under test) needs to be operational during the testing procedure, you need to consider that when sizing the test chamber. For example, if a DUT creates 10,000 watts of heat under normal operation and your test chamber isn’t sized to accommodate that extra heat, the chamber may not seem to be working as well as it should. Also, are you only testing one of these products at a time, or multiple products? Make sure you multiply your calculated live-load to accommodate all products that will be under test.Size the chamber for the future:Buying an environmental test chamber is an investment. Have you done any forecasting of future projects? Are there other testing projects at your facility that will be next in line when the current project is over? If so, will they have the same requirements? Any details you have about future projects can also be addressed by your customer support engineer. It’s worth having the conversation.Sometimes it is best to spend a little bit more up front to ensure cost effectiveness and longevity down the road. Remember; you get what you pay for with environmental test chambers.Find an appropriate location where the chamber will be installed:Test chambers have many different requirements. Depending on the type of chamber, the requirements could be vastly different. Is there adequate power available? If the chamber is water cooled, or has a humidity option, does it have access to an acceptable water supply? If you need a high rate of change, do you have access to liquid nitrogen (LN2)? When the unit arrives will it fit through the door?Having the location ready to accommodate a new test chamber will alleviate a lot of headaches when the chamber arrives.When considering all possible variables, you can reduce the time it will take to get your project rolling and get your products to market.We have the experience and expertise to provide the right solution for your project. If you want to get a jump start on your testing by using our A2LA certified test laboratories, you may even be eligible for a discount on testing services. Contact us for more information.

Several skills for selecting ozone aging test chamberIn order to solve the rubber products cracking, we developed ozone aging test chamber. It can simulate and strengthen the ozone conditions in the atmosphere, study the law of ozone on the rubber, rapid identification and evaluation of rubber anti-ozone aging performance and anti-ozone agent protective effect of the method, and then take effective anti-aging measures to improve the rubber products Service life.1. From environmental temperature. Some products need to be tested at subzero temperatures, and some are tested at room temperature (23 degrees Celsius) Some are tested in high temperature, you need to know what is the test temperature of your product。If there is no air conditioning system in your room to place the ozone test chamber,It suggests to choice refrigeration system when you purchase an ozone test chamber.To avoid testing in the summer with high room temperature and cause the test is not accurate.2. From factory qualification. Choose a strength and experienced manufacturer, Experienced manufacturers are not only instrumentation, as well as follow-up technical support, which is crucial.3. From chamber capacity. As long as it can accommodate your tested product, so the smaller the better.We don’t need too larger chamber than your test specimen, It only will increase the unnecessary cost and increasing difficulty of Ozone concentration control accuracy.4. From sample clamps. Some need to do Static tensile testing, the sample stretched to a certain rate, placed in the ozone aging test chamber to see if there is cracking and so on.Some need to do dynamic tensile testing, The sample was clamped on the dynamic fixture of the ozone aging test chamber to see the situation under the dual effect of mechanical stretching and ozone accelerated aging.Another required It only places the sample in the ozone box.5. From Ozone concentration. Generally, Rubber Ozone concentration have Low Concentration (50～1000pphm) or high concentration (50～300ppm).Rubber parts for wire and cable or military products require a higher test concentration.when you purchase the ozone aging test machine, we must choose a good adjustable range of the test chamber, select the appropriate ozone concentration range can also improve the test accuracy.

What is a test chamber and how does it work?The importance and the operating principles of a test chamberHave you ever bought a product that turned out to be defective after just a few weeks, or even the first time you used it?This might have happened because some products have been subjected to external factors such as temperature, humidity and vibrations that were not expected or otherwise taken into account when they were being designed.In today’s global market in which every product can be sold in the most remote corners of our planet, it is essential that the development and design phase takes into consideration the different environmental conditions to which the product will be subjected, from warmer to cooler climates, the effect of salt corrosion, and many other factors.In addition to the usage conditions, it is good to take into account the various stresses that the product may be subject to during packaging, transport and storage operations, which could cause damage or shorten the useful life of the product.So, what needs to be done to avoid these kinds of potential drawbacks and ensure greater product reliability?The apparently simple answer would be to test the product in all its usage conditions, but this can be done if and only if you have a test chamber. Special temperature and humidity conditions can be recreated inside an environmental test chamber in order to verify a product’s reliability, durability or resistance to atmospheric agents.Using an environmental test chamber helps you discover potential defects to be corrected before the production stage, ensuring:Lower maintenance costsSatisfied CustomersSo, now that we know how important an environmental chamber is, let’s find out how it works.It must be said that there is no universal chamber that can simulate any and every type of conditions, but there are many types of more or less versatile chambers that are designed to perform specific types of tests. For an overview of the main models please go to the article "The test chamber". In this case we will look at the family of chambers most commonly used: the climatic chamber.A climatic chamber is a machine designed and built to simulate certain temperature and humidity conditions inside a test compartment.HOW DOES IT WORK?The operating principle of a test chamber can be explained by the two phisical parameters that the chamber can control: temperature and humidity.TEMPERATURE CONTROLIn order to control the temperature, the chamber must be able to perform two functions: heating and cooling. It also must be able to evenly distribute the temperature inside the test compartment.Specific technical considerations about the distribution of air within the test compartment make it possible to achieve great uniformity of the temperature values over time and throughout the space of the chamber, ensuring that all parts and surfaces of the DUT are subjected to the same temperature.The mechanical cooling system of a climatic chamber consists of a closed circuit system, with the following main components:compressorcondenserexpansion valveevaporatorBy means of the compression and subsequent expansion of a refrigerant gas, the process will uniformly cool the test compartment.There are two minimum temperature values according to which climatic chambers are commonly classified: single stage, those with a minimum temperature of -40°C, anddouble-stage (i.e. with a cascade system), with a minimum temperature of at least -70°C.The mechanical heating system consists of electric heating elements placed near the ventilation system: the heated air is conveyed by means of ventilation through the inside of the test compartment.The action of the two functions of cooling and heating is controlled by the PLC according to the cycle parameters set by the operator to ensure the required performance.HUMIDITY CONTROLIn order to control the humidity, the chamber must be able to perform two functions: humidification and dehumidification. It also must be able to distribute humidity uniformly within the test compartment.Direct humidification is achieved by means of an electric humidifier, which injects steam through a hole in the air flow after the air recirculation fan. This ensures aerosol-free humidification. The humidifier is controlled by a dedicated algorithm for better reliability. The chamber is dehumidified by a mechanical system based on the so-called cold finger principle, utilizing the same mechanical system used for cooling. According to this principle, when an object with a lower temperature is exposed to a higher ambient temperature, the moisture in the air condenses on the surface of the colder object. The evaporator is the element with the lowest temperature inside the climatic chamber, and a dedicated section of this is thus used to lower the humidity levels in the test compartment when required.