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Fluorescent / UV Testing Accelerated Weathering Tester

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产品名称: Fluorescent / UV Testing Accelerated Weathering Tester
产品型号:
产品展商: Lab Companion 宏展
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简单介绍

Fluorescent / UV Testing Accelerated Weathering Tester UV Accelerated weathering tester, is designed to simulate the weather mix with UV light, temperature and moisture conditions. The tests are intended to reproduce the damage caused by sunlight, rain and condensed surface moisture or dew. Types of damage include color change, gloss loss, chalking, cracking, hazing, embrittlement, and strengt


Fluorescent / UV Testing Accelerated Weathering Tester  的详细介绍

Fluorescent / UV Testing Accelerated Weathering Tester

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 Atlas UVTest. 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 Lab Companion 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. 


Model

 Lab Companion UV

 Controller

LCD touch screen control, programmable of temperature, humidity, UV (sun), spray (rain) and time.  Maximum 999 cycle

 Temperature Range RT to 70C
 Humidity Range 50-95%RH
 UVA-340 Lamp 295-365nm
 UVB-313 Lamp 313nm
 Standard Sample Holder 75x150x1.5mm
 Distance from sample to lamp 50mm
 Center distance between the lamp 35 or 70mm

 Chamber External Size

1520x800x1620mm(HxWxD)
 Power Supply 220Vac 50/60Hz

UV/basic: UV and condensation (no irradiance control)
UV/se: UV, condensation and irradiance control
UV/spray: UV, condensation,  irradiance control and water spray
UV/cw: cool white visible light, condensation and  irradiance control


The listed standards and specifications may include several alternative testing options. The instrument meets at least one option in any listed standard. Standards are subject to change without notification, which may result in a change in testing technology. Always check the revision status of a standard with the responsible Standards Development Organization. If unsure about instrument compliance, please contact your local sales representative.

Standard

  • ASTM D4329
    Standard Practice for Fluorescent UV Exposure of Plastics
  • ASTM D4587
    Standard Practice for Fluorescent UV-Condensation Exposures of Paint and Related Coatings
  • ASTM D4799
    Standard Test Method for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Fluorescent UV and Condensation Method)
  • ASTM D5208
    Standard Practice for Operating Fluorescent Ultraviolet (UV) and Condensation Apparatus for Exposure of Photodegradable Plastics
  • ASTM G151
    Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
  • ASTM G154
    Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials
  • DIN EN 12224
    Geotextiles and geotextile-related products - Determination of the resistance to weathering
  • DIN EN 1297
    Flexible sheets for waterproofing - Bitumen, plastic, and rubber sheets for roofing - Method of artificial ageing by long term exposure to the combination of UV-radiation, elevated temperature and water
  • DIN EN 13523-10
    Coil coated metals - Test methods - Part 10: Resistance to fluorescent UV light and water condensation
  • DIN EN ISO 4892-1
    Plastics - Methods of exposure to laboratory light sources - Part 1: General guidance
  • EN 927-6
    Paints and varnishes - Coating materials and coating systems for exterior wood - Part 6: Exposure of wood coatings to artificial weathering using fluorescent UV and water
  • ISO 11997-2
    Paints and varnishes - Determination of resistance to cyclic corrosion conditions - Part 2: Wet (salt fog)/dry/humidity/UV light
  • ISO 16474-3
    Paints and varnishes - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV lamps
  • ISO 4892-3
    Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV-lamps
  • prEN 1062-4
    Paints and varnishes - Coating materials and coating systems for exterior masonry - Part 4: Preconditioning of exterior coatings to UV radiation and water in apparatus
  • SAE J2020
    Accelerated Exposure of Automotive Exterior Materials Using a Fluorescent UV and Condensation Apparatus


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