Water requirements for xenon lamp aging chamber

Regarding the spray and condensing water requirements of the xenon lamp aging chamber, to ensure that it meets the requirements of ASTM G151, ASTM G154, ASTM G155 and ISO 4892 and other standards, in order to avoid scale formation on the sample surface in the xenon lamp aging chamber. Our comprehensive expert opinions in the field of water purification talk about the water requirements of the xenon lamp aging chamber.

Generally, the resistivity of tap water is 10-100 ohm.m, the resistivity of distilled water is 100-10000 ohm.m, and the resistivity of deionized water is 10000-100000 ohm.m.

1. For the tube cooling water, deionized water must be used, and the conductivity is below 5us/cm, because the triggering of the xenon lamp generates a large current and high pressure. If water with high conductivity is used, the lamp will be caused when the tube is triggered. The tube is damaged, and the temperature of the second water inlet must be below 35°C. Because the water temperature is too high, it will also lead to the service life of the xenon lamp tube. Therefore, in the case of using circulating water, a closed cold water system and filtration are necessary. The system ensures that the water quality causes secondary pollution due to cooling.

2. The water used for spray water and humidification must also be distilled water. If you use ordinary tap water, a white substance will appear on the surface of the sample, which will not achieve the purpose of irradiation. This substance is the impurity of water after evaporation. The later produced is called calcium and magnesium crystals, so this piece requires the use of distilled water to ensure the consistency of radiation and achieve the purpose of real testing.

3. Use fresh distilled water or deionized water. Because water is easily polluted by carbon dioxide and dust after it comes into contact with air, after a long time, there will be impurities in the water and the resistivity will decrease.

Purified water sold on the market can generally meet the demand. The resistivity of purified water is equivalent to that of distilled water. It is also more economical and convenient to buy purified water.

With the passage of time, the efficiency of the original water purification system in removing colloidal silica in the water has become lower and lower. This can lead to the rapid formation of scale, as we often see in the laboratory. In contrast, a reverse osmosis system can maintain stable operation for a relatively long period of time without returning silica to the water.

The xenon lamp aging chamber uses a xenon arc lamp that can simulate the full sunlight spectrum to reproduce the destructive light waves existing in different environments, which can provide corresponding environmental simulation and accelerated tests for scientific research, product development and quality control. The xenon lamp aging test chamber is divided into two forms; one is divided into air-cooled; the other is water-cooled; if the water used in the water-cooled xenon lamp aging chamber is not circulated, the water consumption after one test is also very high Yes, if it is to be recycled, the change of water quality and the temperature of the water require a lot of requirements. The water-cooled xenon lamp aging test chamber has very strict requirements for water quality.