Calibration Analysis of Xenon Lamp Aging Test Chamber
Xenon lamp aging testing-equipment' target='_blank'>test chamber is an instrument and equipment for laboratory accelerated weathering aging test of materials. At present, most of them are imported. Our company (Hong Kong) Co., Ltd. is a manufacturer of textile testing instruments. It can produce individual models of domestic aging machines. It can act as an agent for imported brands, and customers in need are welcome to inquire in time. In addition, the technical engineer said that the use of xenon lamp aging test chamber, irradiance calibration is very important. Users can entrust manufacturers or measuring institutions to calibrate, or use the methods provided by manufacturers to calibrate themselves. The methods for calibrating irradiance of aging test chambers of different manufacturers are different, but the following two methods are usually used for calibration. 1. Calibration with standard lamp The power of the standard lamp and the irradiance have a strict and accurate correspondence, and the irradiance can be known by measuring the power of the standard lamp. When using the standard lamp for calibration, you need to first remove the work lamp, install the standard lamp, and then start the device to enter the corresponding mode, let it automatically calibrate according to the relationship between power and irradiance, and then remove the standard lamp and install it. Back to work light. The calibration operation process with the standard lamp is more complicated and cumbersome, and it requires specially trained personnel to complete it. Since this method relies on the corresponding relationship between the power and irradiance of the standard lamp, and the corresponding relationship between the power and irradiance of the xenon lamp will change after aging, the life of the standard lamp is relatively short and the price is high, which are greatly Increase the user's cost of use. Standard lamp calibration is commonly found in water-cooled xenon lamp burn-in chambers. 2. Calibration with radiometer Compared with standard lamps, calibration with radiometer is simple, fast and intuitive. When calibrating, place the sensor of the radiometer on the sample holder in the xenon lamp aging box, make the light-receiving surface of the sensor face the light source, and ensure that the distance from the light-receiving surface to the light source is the same as the distance from the sample surface to the light source, and then compare the radiation. The measured values of the light meter and the xenon lamp aging test chamber can be calibrated, and the xenon lamp aging test chamber like Q-Lab in the United States can even be calibrated automatically without manual intervention. This allows even personnel without special training to perform the operation. In addition, the price of the radiometer is lower than that of the standard lamp, and it can be used for a long time without frequent replacement. It only needs to be calibrated regularly (usually one year). At present, photoelectric sensors are generally used in xenon lamp aging test chambers to measure irradiance. The higher the consistency between the spectral response range of the sensor and the measurement band, the better, but it is difficult to achieve complete consistency and needs to be corrected through calibration. The main methods of irradiance calibration are: commissioned calibration, self-calibration using standard lamps (need to be supported by the manufacturer), and self-calibration using a special radiometer certified by metrology. The entrusted calibration cannot be carried out at any time according to the needs of the user, and requires the cooperation of the manufacturer or the measurement organization. The latter two calibration methods are implemented by users themselves. The operation process of calibration using standard lamps is relatively complicated, while calibration using radiometers is simple and quick. Users of the xenon lamp aging test chamber can choose the appropriate way to calibrate the irradiance according to their needs.
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