Table of Contents
What is Weatherometer testing?
Xenon Arc weatherometers simulate the weathering process of indoor and outdoor sun exposure on materials. The test is useful in applications where paints and coatings require high quality finishes that are subject to high levels of UV degradation.
What is ASTM G155?
ASTM G155 is a practice for operating xenon arc light apparatus for exposure of non-metallic materials. This practice is the basis of all of the other standards for accelerated weathering using Xenon Arc UV light sources to simulate exposure to natural sunlight on an accelerated basis.
What is fade o meter?
A device used to measure a paper’s lightfastness, or its ability to resist yellowing and fading upon exposure to light, by exposing the paper to light radiation produced from a carbon arc or xenon tube. A Fade-Ometer is also used to measure the fading resistance of inks and other pigments.
What is xenon arc testing?
Xenon arc testing promotes property changes of materials, including the effects of sunlight, moisture and heat, by simulating ultraviolet and visible solar radiations by means of a weatherometer.
What is LPG weathering?
LPG weathering is a test method which provides the volatility performance assessment and the relative purity measuring of various types of LPGs [2], according to the ASTM D-1837 standard. a) PrecaoliMg Equipment. I) Weathering tube and ASTM.
What is ASTM G154?
ASTM G154 is a standard that is used as the basis for all other accelerated weathering standards that use fluorescent UV light sources to simulate exposure to natural sunlight. Many standards call up this practice.
What is ASTM D2244?
ASTM D2244 is a standard test method for calculating color differences from instrumentally measured color coordinates. The sample color is measured and the results can be expressed on the L, a, b or x, y, z scales.
Why is xenon used in lights?
Xenon gas is used as it helps establish an arc between the electrodes (and hence create light) at lower temperatures, but becomes less important when the bulb is up to temperature.
How does a xenon arc lamp work?
A xenon arc lamp is a special type of gas discharge lamp. Xenon arc lamps produce light by passing electricity through ionized xenon gas at high pressure. It produces a bright white light that closely mimics natural sunlight, which extends its applications into the film, and daylight simulation industries.
How do you test LPG?
This can be tested by disconnecting the outlet of the valve and spraying inside with leak detection fluid while maintaining electrical continuity. If it is shown to be leaking, it should be made safe. The emergency service provider should be contacted if natural gas is being tested or the supplier in the case of LPG.
Does LPG gas evaporate?
It is typically used as a gas (vapour) but there are liquid applications, as well. The pressure and temperature at which it is stored determines which kind you have. At 1 ATM, propane vaporises at-42°C. LPG (propane and/or butane) turns from liquid to gas when the LPG gas temperature reaching the boiling point.
How is UV resistance measured?
The colorfastness to light of the specimen is evaluated by comparison of the color change of the exposed portion of the test specimen to the unexposed original material. The change in color can be measured by a spectrophotometer.
Do xenon lamps explode?
As lamps age, the risk of failure increases, so bulbs being replaced are at the greatest risk of explosion. Lamp manufacturers recommend the use of eye protection when handling xenon short-arc lamps. Some lamps, especially those used in IMAX projectors, require the use of full-body protective clothing.
What is the difference between xenon and LED headlights?
Xenon Headlights They use less energy than halogens and more than LEDs. They also are hotter than LEDs and become dimmer over time. In an xenon headlight, electric current passes through the xenon gas to create an arc between two electrodes and generate intense white or bluish light that is often brighter than LEDs.
What is the test pressure for LPG?
On a standard propane installation tank or bottle – if the test is from a valve – the test should be 36–37mbar whereas if the test is through a regulator, the test should be 30–31mbar.
How often do LPG tanks need to be tested?
every ten years
These inspections must be conducted every ten years. As such, owners must ensure that the LPG tank is inspected before a period of ten years has elapsed after the date indicated on the tanks. This date will be checked by authorised LPG examiners at the time of inspection for renewal of registration.
What’s the difference between LPG and propane?
They are one and the same thing. In the United States it’s commonly called propane and rarely called LPG. Butane – In some countries and for some uses LPG is composed of a mix of propane and butane gas. That’s why some people refer to butane as a form of LPG.
What is a ‘hazy sunshine’ weather warning?
Hazy sunshine is not so much a weather warning as a way of saying that cloud, mist or fog may conceal the sunshine.
What is hazy sunshine and is it dangerous?
Hazy sunshine is not so much a weather warning as a way of saying that cloud, mist or fog may conceal the sunshine. But in some countries, like India, Korea and China, the haze might be hazardous for breathing.
What kind of UV light does the weatherometer use?
This weatherometer allows for safely conducting exposure tests of harmful UV-C radiation.The UV source we use is our 3×3 module which includes 9 LEDs. 100mW LEDs totalling to just about 1W of UV light and is driven by an internal UL recognized power supply.
What is the use of sunshine xenon arc weatherometer?
Xenon Arc Weatherometer is widely used in paintings, plactics, textile industry. LIB Environmental is one of the professional and credible manufacturers of climatic and environmental testing chambers in China. Equipped with a professional factory, we can offer you sunshine xenon arc weatherometer with competitive price.