1. Heating system
Using high-speed titanium alloy heating electric heating tube
Temperature control and lighting are completely independent systems
The temperature control output power is calculated by a microcomputer to achieve high precision and efficiency. Electrical benefits
Has the over-temperature prevention function of the heating system
During the cycle test, there is a test section that is a dark condensation process, which requires the box to produce higher temperature saturated water vapor. When the water When the vapor encounters the relatively cold sample surface, dew will condense on the sample surface.
2. Test chamber structure
. The inner tank material is mirror stainless steel plate
. The outer shell material is steel plate sprayed
. There is one or several high-pressure mercury lamps in the upper part of the studio
br/> . The heating method is circulating heating in the air duct, with uniform temperature distribution
. The sample holder is made of stainless steel or aluminum alloy
3. Main technical specifications and parameters of the equipment
. Working room size ㎜
. Dimensions㎜
. Temperature range＋℃～℃
. Temperature uniformity℃
. Temperature fluctuation.℃
. Humidity fluctuation%
/> . Temperature control mode, self-adjusting temperature control mode
. The distance between the center of the sample and the lamp is adjustable
. Effective irradiation area㎜
. Test time ~ adjustable
. Ultraviolet light , Dark time is alternately adjustable
. Spray time is adjustable
. Total power
4. Equipment Characteristics
Natural sunlight damages materials, causing incalculable economic losses every year. , the mercury lamp aging test chamber can reproduce the damage caused by sunlight. The equipment performs the test by exposing the material to be tested to a controlled alternating cycle of sunlight and darkness while increasing the temperature. The equipment uses a high-pressure mercury lamp to simulate sunlight.
In just days or weeks, mercury lamp aging test equipment can reproduce the damage that would take months or years outdoors. The damage caused mainly includes fading, discoloration, decrease in brightness, powdering, cracking, blurring, embrittlement, decrease in strength and oxidation. The test data provided by the equipment is extremely helpful in the selection of new materials, improvements to existing materials, or evaluation of compositional changes that affect product durability. Equipment can do an excellent job of predicting the changes a product will encounter outdoors.
5. Protection system
. No fuse protection switch
. Over-temperature
. Leakage door opening protection
. Fully sheathed terminal block
/> . Automatic shutdown and other protection
6. Equipment usage conditions
. Ambient temperature ℃～＋℃
. Ambient humidity %
. br/> Refer to the standard mercury lamp testing machine Suitable for performance reliability testing of a variety of industrial products, refer to UV aging test standards such as "Test Methods for Building Waterproof Coatings".
Simulation of UV and Sunlight
Although UV light only accounts for % of sunlight, it is the main lighting factor that causes the durability of outdoor products to decrease. This is because the photochemical effects of sunlight increase as the wavelength decreases. Therefore, it is not necessary to reproduce the entire sunlight spectrum when simulating the damaging effects of sunlight on the physical properties of materials. In most cases, only short-wavelength light needs to be simulated. The reason why UV accelerated weathering testers use lamps is that they are more stable than other lamps and can better reproduce test results. The best method is to use fluorescent lamps to simulate the effects of sunlight on physical properties, such as brightness decrease, cracking, and peeling. There are several different lights available. Most of these lamps produce primarily ultraviolet light rather than visible and infrared light. The main difference between lamps is the total energy they produce in their respective wavelength ranges. Different lights will produce different test results. The actual exposure application environment can indicate which type of lamp should be selected.
The advantages of fluorescent lamps are rapid test results, simplified illumination control, stable spectrum, low maintenance, low price, and reasonable operating costs.
Ultraviolet high-pressure mercury lamp is a type of gas discharge lamp. It uses bipolar arc discharge to evaporate mercury, thereby producing characteristic spectral lines of mercury vapor. Its spectral lines are mainly in the ultraviolet part, such as, among which the line spectra of and. A great advantage, this is very valuable for the curing process, because many photoinitiator systems have strong absorption in this area, so the lamp is also called a curing lamp.
The main wavelength of this lamp is, power, and can be made into two types: single-ended/double-ended. The principle is that a certain amount of mercury is added inside the lamp, so it is named. The inside of the mercury lamp is in a vacuum state. Under the high-voltage excitation of the power supply, the lamp atomizes the mercury inside the lamp tube and emits ultraviolet light. There are certain regulations on the internal vacuum degree and the amount of mercury added. Otherwise, it cannot emit light or cannot excite light of normal wavelength. The ultraviolet high-pressure mercury lamp emits light with high heat, because when working at full power, the ultraviolet high-pressure mercury lamp also emits visible light and part of the infrared lamp, and the light wavelength is concentrated to the right.
Due to frequent exposure to sunlight, the coating layers of wood, including paints and stains, will corrode accordingly. Recent research into structures suggests that the material itself is directly exposed to damaging effects. This process can be repeated many times, resulting in a material degradation phenomenon that cannot be reproduced by thermal means alone.
Use light source
The light source uses one or several high-pressure mercury lamps with a rated power of 0.00000000000000000000000. Placed on the top of the box, there is a reflector on the mercury lamp to more intensively display the superior light source of the mercury lamp
. Intelligent Korean three-way temperature controller, control accuracy.℃
. Membrane key
. Temperature control adopts +, and the system coordinates control with the same channel, which can improve the stability and life of the control components and interface
. Touch setting, digital and direct display
. Has the function of automatic calculation , which can reduce the inconvenience caused by manual settings
. If an error occurs during operation or setting, a warning signal will be provided
. French Schneider Electric components
Temperature control< br/> Cycle
The first-order photochemical reaction is not sensitive to temperature changes. However, the speed of the subsequent secondary reaction is closely related to the temperature change. Generally speaking, as the temperature increases, the reaction rate increases. Therefore, temperature control is very important during the exposure test. What is more important is to match the test temperature used in the accelerated test with the highest temperature encountered by the material in actual applications. The temperature setting in the device can be anywhere from ℃ to ℃, depending on the light level and indoor ambient air temperature. The temperature adjustment of the equipment is controlled by a controller with microcomputer calculation function.
Xenon arc lamp aging test chamber