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XD-21-856UV Light Accelerated Tester

UV Light Accelerated Tester

Product Number: XD-21-856


Product Origin: China

Purchasing Heat:1811

Standard: ISO 11507,ISO EN 4892-3,GB/T 14522,GB/T 23983,GB/T 23987,GB/T 16422.3,ASTM D4587,ASTM D5894,ASTM G154,ASTM D4329,ASTM D,SAE J2020

XD-21-856 UV Light Accelerated Aging Test Chamber (hereinafter referred as XUV)adopts fluorescent UV lamp as the light source.

Click to see the big picture

Product Details


XD-21-856 UV Light Accelerated Aging Test Chamber (hereinafter referred as XUV)adopts fluorescent UV lamp as the light source. Its inner temperature and humidity can be properly controlled to obtain the periodic condensation on the sample for fully evaluating the damaged factor caused by sunlight, moisture and temperature (materials aging phenomenon includes fading, disluster, intensity reduction, cracking, flaking, chalking, and oxidation).

Fluorescent UV light can emulate the effect of sunshine, while condensation and water spray system can emulate the effects of rain and dew. During the test, radiation energy and temperature are controllable. A typical test cycle generally carries out under strong irradiation of UV light or in the dark and wet condensation period with 100% relative humidity. These tests generally applied in the fields of paint and coatings, automotive industry, plastic, wood, glue, etc…



Ⅱ.Test Methods & Material Standards:

◆ISO 11507《Paints and varnished-Exposure of coatings to artificial weathering- Exposure to fluorescent UV lamps and water》
◆ ISO 4892-1《 Plastics-Methods of exposure to laboratory light sources-Part 1: General Guidance》
◆ ISO 4892-3《 Methods of exposure to laboratory light sources-Part 3: Fluorescent UV lamps》
◆ ASTM D 4587《Standard Practice for Fluorescent UV-Condensation Exposures of Paint and Related Coatings》
◆ ASTM D 4329《Standard Practice S for Fluorescent UV Exposure of Plastic》
◆ ASTM G-151《Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that use laboratory light sources》
◆ ASTM G-154《Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Non-Metallic Materials》
◆ BS 2782:Part5, 《Method 540B (Methods of Exposure to Lab Light Sources) 》
◆ SAE J2020《Accelerated Exposure of Automotive Exterior Malts Using a Fluorescent UV/Condensation Apparatus》
◆ JIS D 0205《Test Method of Weather-ability for Automotive Parts》


◆ Original UVA or UVB lamps from America,  ensure the comparability of testing results.
All XUV machines use fluorescent UV lamps produced by Amercian as testing light source, comparing with other type lamps (including Xenon Lamps), UV lamps are more stable. Its spectrum power distribution won’t change as the lamps weathering, even to 6,000 hours. Thus more repeatable testing results can be achieved easily, and decrease changing lamps times and reduce the running cost..
Furthermore, these lamps from Amercian are produced on the base of more than 40 years’ experience and fluorescent technology. It is designed specially and tested with most serious quality control.

◆ With Original Intellectual Property Rights and Initiated in China, our ballast can extend the lamp lift to 6,000 hours, save use-cost greatly for users.


◆ Irradiance can be controlled automatically(with the closed-loop system, the value of irradiance is more precise and steady.Only for XD-21-856)
The superiority of XD-21-856 UV Light Accelerated Aging Test Chamber is that it can be controlled and adjusted automatically during testing process. As it is well known, the energy in testing process is the main factor in polymer materials aging. In order to ensure reproducibility and comparability of testing results, the UV energy is a very important technical indicator. We adopt the principles which similar with Sun- eye automatically monitor the testing process throughout the energy value, when the lamp energy is less than the expected value, the system can automatically monitor the difference and automatically replenish energy immediately.

◆ Irradiance can be calibrated automatically (Only for XD-21-856)
As any other lamps, UV lamps energy of XUV also decreases as time increase. The control system would compensate it automatically through strengthening the voltage of lamps.  But as the using time become longer and longer, the energy of lamps decrease continuously. For some high set point of irradiance, XUV couldn’t keep this irradiance any longer, and now the system of XUV would reminder failure “the error of irradiance is too large” and shut off the machine. Now, the operator should calibrate the XUV by standard calibration radiometer. If machine still can’t get the set point after calibrating, the user should replace the two pcs lamps corresponding to the relative sensor and calibrate again.

XUV is calibrated by XD Calibration Radiometer which is produced by our company. User can use one radiometer to calibrate some XUV, radiometer can test fluorescent UV lamps. It is not only used to calibrate the UVA lamps , but also to do UVB lamps. For UVB lamps, it has been calibrated well under the wave length 313 nm with W/m2/nm unit before delivery. For UVA lamps, it has been calibrated well under the wave length 340 nm with W/m2/nm unit.
Calibration Radiometer is made up of radiometer and sensor(see picture as below):
The sensor of XD 8118 calibration radiometer is very sensitive to ultraviolet rays, but don’t have any action to visible light, and just have a little response for infrared light even can be ignored. So other rays can’t bring any influence for this radiometer.
◆ Water Spray and Condensation function
Water spray
For some applications, the water spray can simulate end-use environmental conditions better. Water spray can effectively simulate heat shock or mechanical erosion caused by dramatic temperature changes or rain. In some practical application conditions, such as a sudden brash in a sunshine day, can bring heat shock because the temperature of the material changes drastically.  This heat shock severely tests the properties of many materials. XUV water spray can simulate this heat shock and / or stress corrosion.
XUV spray system design with 12 nozzles, each side has 6 pieces in the test chamber. Spray system can run a few minutes and then shut down. This transitory water spray can cool the samples quickly, creating heat shock conditions. 
In many outdoor environments, materials are placed in wet condition for over 12 hours each day. Studies have shown that the main factor of this wet condition outdoor is caused by dew, not rain. XUV simulates the outdoor moisture erosion through the unique condensation capabilities. In the condensation cycle during the test, water on the bottom of the chamber is heated to obtain superheated steam filling the test chamber. Hot steam makes the chamber maintain 100% relative humidity, and maintain a relatively high temperature.  Sample was fixed on the wall of test chamber. Thus the sample surface is exposed to the ambient air of test chamber. The other side of the sample is exposed to the natural environment which has a cooling effect, bringing internal and external surfaces of the sample with temperature difference, and the temperature difference leads to the test surfaces always have drips caused by condensation process. 

◆ Control the temperature automatically with high precision Pt 100 temperature sensor of black board.
In each cycle, the temperature can be controlled at a set value. At the same time, the black panel thermometer can monitor the temperature. Temperature increase can accelerate the aging process, and the temperature control for reproducibility of the test is also very important.
BST (Black panel thermometer)consists of a PT100 sensor and a metal panel painted by black coating, and be exposed to the same condition as test panels. It’s used to monitor exposuring test panels surface temperature during test.  BST can be set any value according to different requirements and also be controlled automatically during the whole test. It also can be calibrated periodically. 
◆ Confirms to many test standards. Operator can set different program freely.
According to different standards or test methods, operator can edit different test programs. For each program, it can be set as 10 segments, and each segment can set different work conditions(four types: Irradiation, water spray, condensation and finish)as well as relevant test parameters.
XUV can permit operator to edit six test programs at most and save it permanently. Generally speaking, if the operator has set and saved one program in the XUV, for next test, if he still use this same program, just choose this program and run XUV directly, no need to set again.
◆ Controlled by touch screen with friendly windows, user can check any parameter during test
 XUV all controllings and showings are finished by a high definition colorful touch screen. Menu operation interface is very convenient for operator to use and maintain XUV. During the working, all parameters are show on the touch screen.
◆ Real-time collect and store data, all testing data can be converted EXCEL format automatically and be saved.
There is a USB interface at the XUV back, through this interface, operator can export all running parameterts at any period by a U disk. It’s convenient for operator to search and do statistics for XUV, and achieve the real unattended running. 
◆ Come with TCP/IP Ethernet interface, the user can tele-control XUV through TCP/IP internet.
With this interface, operator only need to set reasonable IP address, then can monitor XUV working status at any place. Even operator is not in his laboratory, he still can run and maintain XUV. Moreover, this function is also convenient for Biuged to help our customers to slove all problems and do some necessary after service. Settle completely users troubles back at home.
◆ Come with a booster pump, even the user’s external water pressure is not enough, XUV still can work normally with this booster pump.
◆ Alarm and protection functions: Low water level protection,over-temperature protection switch, leakage protection, heating overload protection, big error for irradiance, lack.

Ⅳ.Main Technical Parameters:



Light Source

UV-A(wave length 340nm) or UV-B (wave length 313nm);

40W×8pcs(The normal use-life is 6,000 hours)

The RANGE OF Irradiance


Temperature Range

Black Panel temperature(BPT):RT+10℃~80℃

Total Max.Power


Interior/Exterior Material of cabinet

Stainless steel-SUS 304 material

Insolating Area


Sample Capacity

48 pieces of standard specimen (75×150mm standard samples)

Or 15 pieces of 100×300mm

Water Consumption

7L/day (for condensation); 4L/minute(for spray)


220VAC±10% 50/60Hz; 15A (Max Electric Current)

Overall Size




Ⅴ.Ordering information:



XD -855

Basice XUV--- Basic Ultraviolet Light Accelerated Weathering Cabinet (No irradicance control)


XUV---Ultraviolet Light Accelerated Weathering Cabinet

XD 8110

UVB lamps (40w/313nm)

XD 8111

UVA lamps (40W/340nm)

XD 8118

Calibration Radiometer (310nm&340nm)

XD 8120

0℃ Standard Resistor

XD 8121

100℃ Standard Resistor

XD 8130

Sample Shelf


Ⅵ. Documents:

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