紫外线曝光用荧光设备 G154

荧光紫外线暴露设备_紫外线曝光用荧光设备 紫外老化试验箱 Fluorescent UV Testing G154 UVA340 UVB313

荧光/紫外线测试
已经开发出具有特定光谱分布的荧光UV灯，其机械和电气特性与用于住宅和商业照明的那些相似。这些光源被纳入荧光紫外线聚光装置，如HONGZHAN UV TestER。这些装置可用于改变亮/暗循环，温度，冷凝湿度，喷水和辐照度控制的测试中。

有几种不同类型的荧光紫外灯具有独特的光谱特性。荧光UV-B灯（F40和UVB-313）具有约313nm的峰值，其几乎所有能量都集中在280nm和360nm之间。很大一部分波长比自然光照下的波长短。波长长于360nm的辐射很少。当加速试验使用UV-B灯时，实验室加速和室外试验之间经常报告材料稳定性等级的逆转。这是因为大量的短波紫外线和缺乏长波紫外线和可见光辐射;降解机制可能与“自然”测试的机制有很大不同。
荧光黑灯，称为UV-A灯，可提供340nm-370nm的峰值发射（例如，UVA-340和UVA-351）。在1987年开发的UVA-340灯中，短波长辐照度模拟了325nm以下的直接太阳辐射。

由于UV-A灯不会发出低于自然阳光斩波的辐射，因此与室外风化的相关性有所改善，但测试时间比使用UV-B灯更长。然而，可以注意到，使用荧光灯的测试被广泛实践。这些测试对于特定条件下材料之间的相对等级比较非常有用，但与服务寿命性能或与室外暴露的相关性的比较可能无效。紫外灯的最&佳用途是用于一般的筛选测试，例如通过人为刺激的暴露检查总配方错误。
与竞争对手的荧光紫外线设备相比，HONGZHAN UV TestER是一种新型仪器，在功能，易用性，准确性和安&全性方面具有更高的标准。

Fluorescent / UV Testing

Fluorescent UV lamps, similar in mechanical and electrical characteristics to those used for residential and commercial lighting, have been developed with specific spectral distributions. These sources are incorporated into fluorescent UV condensation devices such as the HONGZHAN UV TestER. These devices may be used in tests that vary light/dark cycles, temperature, condensing humidity, water sprays, and irradiance control.

There are several different types of fluorescent UV lamps that have unique spectral characteristics. Fluorescent UV-B lamps (F40 and UVB-313), with a peak around 313 nm, have nearly all of their energy concentrated between 280 nm and 360 nm. A large percentage is at wavelengths shorter than what is present in natural sunlight. There is very little radiation with wavelengths longer than 360 nm. Reversals in the stability ranking of materials have often been reported between laboratory accelerated and outdoor tests when the accelerated test uses UV-B lamps. This occurs because of the large amount of short wavelength UV and the lack of long wavelength UV and visible radiation; the mechanisms of degradation may be significantly different from those of the “natural” tests.

Fluorescent black lights, referred to as UV-A lamps, are available with peak emissions of 340 nm – 370 nm (e.g., UVA-340 and UVA-351). In the UVA-340 lamp, developed in 1987, the short wavelength irradiance simulates that of direct solar radiation below 325 nm.

Because UV-A lamps do not emit radiation below the cut-on of natural sunlight, correlation with outdoor weathering is somewhat improved, but test times are longer than with UV-B lamps. It may be noted, however, that tests using fluorescent lamps are widely practiced. These tests are useful for relative rank comparisons between materials under specific conditions, but the comparison to service lifetime performance or correlation to outdoor exposures may not be valid. The best use of the UV lamps is for general screening tests, such as checking for gross formulation errors with an artificially harsh exposure.

The HONGZHAN UV TestER is a new instrument, higher standard in terms of features, ease-of-use, accuracy and safety as compared to competitive fluorescent UV devices.