Water cooled xenon lamp aging test chamber

Water cooled xenon lamp aging test chamber

The Si4000 xenon lamp aging tester is a fully automatic parameter closed-loop control aging tester, with a large LCD touch screen display. It can simultaneously control control parameters such as light irradiation, blackboard temperature, box temperature, box humidity, spray cycle, and operating time. The controller has preset more than ten programs at the factory, and users can also customize three programs. After the program is called and executed, it runs automatically without the need for manual monitoring. The power of Si4000 lamp tube is 6500W. In a natural aging environment, the sample is mainly exposed to radiation from light with wavelengths between 300-800nm. Si4000 can choose 340nm, 420nm, and 300-400nm as monitoring points to control the radiation intensity at that location.

During the experiment, in order to ensure the reproducibility of the test results, it is necessary to maintain the constant parameters of the experiment process, among which the irradiation intensity of the light source is the most important control parameter. In order to overcome the influence of lamp attenuation and voltage instability on irradiation intensity, Si4000 measures the irradiation intensity of monitoring points through a light sensor. After comparing the results with the set value, the lamp power is closed-loop controlled by adjusting the current to ensure that the irradiation intensity of the sample is always constant. The American standard for outdoor aging often uses 340nm as the monitoring point; The American standard for indoor aging often uses 420nm as the monitoring point; The European standard commonly uses 300-400nm for both indoor and outdoor applications. It is recommended to use 340nm as the first monitoring point and 420 as the second monitoring point in the host. When conducting a certain experiment, both monitoring points can be monitored, but only one can be controlled. In addition, we recommend purchasing a 300-400nm light filtering device. When a 300-400nm monitoring point is needed, users can modify it themselves, and the host will automatically recognize it after modification. When both the inner and outer filters are made of borosilicate glass, multiplying the reading at 340nm by 115 is the radiation intensity in the 300-400nm range. The testing machine can control the duration of the test by accumulating radiation energy.

In different real environments and regions, the spectral energy distribution in sunlight is an important control parameter in experimental standards, and blackboard temperature represents the highest surface temperature of the sample when exposed to radiation. When the sample is irradiated, it will experience an increase in surface temperature due to the absorption of infrared energy from the light, and the surface temperature will vary for different colors. During the aging process, temperature is also an important factor affecting the aging rate. Because according to the principle of electrochemistry, the rate of electrochemical reaction doubles for every 10 ℃ increase in temperature. So the surface temperature of the sample is also an important control parameter during the experimental process. The blackboard thermometer, like the sample, is also mounted on the sample holder and hung on the sample holder. The commonly used blackboard thermometers in American and European standards are different. The American standard is called BPT, while the European standard is called BST (Blackboard Standard Temperature). The American standard blackboard thermometer is a metal plate coated with standard paint, while the European standard has a plastic insulation layer attached to the metal plate behind it. Generally, the reading of BST is higher than that of BPT by more than 5 degrees. To meet different standards, it is recommended to use dual channel blackboard temperature measurement and control.

The Si4000 lamp tube is upright in the center of the test chamber, revolving around the upper and lower three layers of rotating sample racks. It can hold 65 samples (sample size 70x150x3mm), ensuring that each sample receives uniform radiation intensity. Each sample needs to be lined with an aluminum plate. If each sample is not enough to fill the sample holder, the empty sample holder needs to be lined with an aluminum plate to fill the entire sample holder.

Si4000 is a water-cooled xenon lamp aging instrument, with internal and external filters forming a water jacket while filtering light. The enormous heat generated by the xenon lamp's emission is carried away by the flow of pure water. Pure water (<1ppm) is used for lamp tube cooling, spraying, and humidification. High water purity can reduce the deposition of impurities on the filter and prevent affecting radiation intensity; Spray is a simulation of rain; Humidification is the process of using compressed air to turn pure water into mist and spray it out to control the humidity inside the box. When the temperature inside the pure water tank exceeds 65 ℃, Si4000 will automatically shut down for protection.

Instrument Description

The service life of the lamp tube: It is recommended to replace it every 2000 hours, and the filter also needs to be replaced regularly. Qinsun Company provides a 4000 hour spare parts package, which can be selected based on different combinations of internal and external filters. The spare parts package includes two lamp tubes, several inner and outer filters, and other consumables, which are sufficient to meet the 4000 hour test.

The Si4000 lamp tube is upright in the center of the test chamber, revolving around the upper and lower three layers of rotating sample racks. It can hold 65 samples (sample size 70x145x3mm), ensuring that each sample receives uniform radiation intensity. Each sample needs to be lined with an aluminum plate. If each sample is not enough to fill the sample holder, the empty sample holder needs to be lined with an aluminum plate to fill the entire sample holder.

Si4000 is a water-cooled xenon lamp aging instrument, with internal and external filters forming a water jacket while filtering light. The enormous heat generated by the xenon lamp emission is carried away by the flow of pure water.

Pure water is used for lamp tube cooling, spraying, and humidification. High water purity can reduce the deposition of impurities on the filter and prevent affecting radiation intensity;

Spraying simulates rain; Humidification is the process of using compressed air to turn pure water into mist and spray it out to control the humidity inside the box. So users need to prepare pure water or pure water generation devices. There is a small pure water tank in the lower left front of the Si4000, and pure water flowing through the lamp tube flows back to the tank. After the pure water is lost, the water level drops, and the machine will automatically replenish it with water; There is also a snake shaped cooling pipe installed in the water tank, which is connected to tap water. As pure water absorbs the heat from the lamp, the water temperature rises. When the temperature inside the pure water tank exceeds 55 ℃, the tap water in the snake shaped pipe begins to flow to cool the pure water, keeping the efficiency of cooling the lamp. The recommended temperature for tap water is below 20 ℃. If users consider the cost and water temperature of tap water, it is recommended to equip a water chiller for recycling. When the temperature inside the pure water tank exceeds 65 ℃, Si4000 will automatically shut down for protection.

● Rotating drum sample holder and uniformity of irradiation intensity and blackboard temperature: The design of the Si4000 rotating drum sample holder is to place the sample vertically on a rotating frame in the center of the instrument. The rotating frame consists of a cylindrical single-layer sample display frame, and the sample rotates around the lamp source at a speed of 1 revolution per minute on the drum frame to obtain balanced light energy, temperature, and humidity. Due to the aging of xenon lamp tubes during operation, some black spots will be generated, which will affect the uniformity of lighting. When the drum sample holder works, it rotates at a uniform speed to evenly distribute the light from the black spots throughout the entire sample space, greatly balancing this subtle error.

Applicable scope

Si4000 is mainly used for testing automotive materials, plastics, paint, packaging, solar photovoltaic, textile industry including geotextiles, pigments, stabilizers, additives, etc.

technical parameter

Light source: One 6500W water-cooled xenon lamp tube

Spectral range: Full spectrum daylight

Radiation intensity closed-loop control range: (307-1356) W/m2 (300-800nm) (Boro/Boro inner and outer filters, see sample for others)

Accuracy of irradiance control: ± 0.1W/m2 of the set value

The irradiation intensity on the surface of the sample is uniform: ≤ ± 4%

Radiation control points: 340nm, 420nm, 300-400nm, 400-750nm, etc. can be selected

Blackboard temperature closed-loop control range: BST: 40~120 ℃; BPT: 40~110 ℃

Blackboard temperature control accuracy: ± 1 ℃

Uniformity of blackboard temperature: ≤ ± 2 ° C

Temperature closed-loop control range inside the box: room temperature~90 ℃

Temperature control accuracy inside the box: ≤ ± 2 ℃

Humidity control range inside the box: Light cycle: 10% -75% (temperature dependent) Dark cycle: up to 100%

Humidity control accuracy inside the box: ≤ ± 5%

Number of sample holders: 65, 3 layers in total

Sample holder size: SL-3T, 69 x 145 x 3mm (width x length x thickness)

Total exposure area: 6500cm2

Power supply: 380V (± 5%)/50HZ, 3-phase 4-wire

Maximum current: 47A

Maximum power: 9.5KW

Net weight: 586Kg

Dimensions: 198cm high, 125cm wide, and 105cm deep

Floor area: 148 x 274cm (width x depth)

Product features:

main engine

·Light source: water-cooled xenon lamp tube, power 6500W, with a minimum lifespan of 2000 hours (when exposed to twice the sunlight). The xenon lamp system should include xenon lamp tubes, internal filter tubes, external filter tubes and other components.

·Filter: A replaceable filter. Multiple light filters are available to choose from, simulating direct outdoor exposure and indirect indoor exposure. Obtain the closest xenon lamp spectrum. A 4000 hour runtime package must be configured.

·Sample holder form: Three layer rotating sample holder, ensuring maximum uniformity of irradiation for all test samples, and ensuring surface irradiance consistency of ± 4%.

Sample holder rotation speed: approximately 1 rpm.

·Sample holder: The thickness of the sample holder can be adjusted to accommodate samples of different sizes and specifications.

·Total exposure area: ≥ 6500cm2

control system

·Chinese and English touch screen operation interface.

·Accurate closed-loop automatic control of blackboard temperature, black label temperature, box temperature, relative humidity, xenon lamp energy, and light irradiation intensity can be achieved simultaneously; The sprinkler system simulates rain and condensation. Capable of displaying processes and test parameters.

·The test program can be edited to gradually change the testing conditions such as irradiance, temperature (including blackboard temperature or black label temperature and box temperature), humidity, and spraying (sample spraying and sample rack spraying), to achieve user set testing programs or cycles. And it can store and call the set program. There should be no less than 5 user-defined testing programs.

·Illumination monitoring and control: You can choose to dynamically monitor and control the irradiance at narrowband wavelengths of 340 nm, 420 nm, or broadband wavelengths of 300nm -400 nm. The controllable irradiance can reach twice that of sunlight, thus meeting the requirements of accelerated testing.

The irradiance can be controlled within the following range: 0.25-1.26W/m2 (@ 340nm) or 0.59-2.46W/m2 (@ 420nm) or 29-141W/m2 (@ 300-400nm). Blackboard temperature or black label temperature control: Equipped with a blackboard thermometer and a black label thermometer, the sample temperature can be automatically controlled by selecting the blackboard temperature and black label temperature. Temperature range: BPT 40-110 ℃, BST 40-120 ℃; The temperature should be controlled within the set value range of ± 2 ℃. Box temperature control: The box temperature can be automatically controlled, with a temperature range of 40-100 ℃. The temperature should be controlled within the set value of ± 2 ℃, and the box temperature should be uniform and consistent. The temperature difference between the highest and lowest points should not exceed 2 ℃ m. Relative humidity control: The relative humidity inside the test box can be automatically controlled, with a humidity range of 10-70% (temperature related) during light cycles, 100% during dark cycles, and controlled at ± 5 ℃ RH, The humidity inside the box should be uniform and consistent, and the temperature difference between the highest and lowest points should not exceed 5% RH.

It has a real-time monitoring system and fault warning system for insufficient water purity, water shortage, and insufficient air pressure, which facilitates real-time monitoring of instrument operation status.

Equipped with xenon lamp irradiance calibration function. Each aging instrument is equipped with a calibration lamp, which can only be used for the corresponding aging instrument and has been certified by the China Institute of Metrology (CMA).

There is a database, which can store the measured data into the database using smart media cards, RE-232 ports, and USB data interfaces. The information in the database can be queried by date, sample number, and other methods.

Prev: Mask particle protection device