ISO 4892 UV Weather Tester UV Accelerated Weathering Test Chamber ASTM C1184

Product Description

ISO 4892 UV Weather Tester UV Accelerated weathering test chamber ASTM C1184
1.Profile
The UV Accelerated weathering test chamber simulates dew and rain with consideation for humidity and/or water spray equipped with a fluorescent UV lamp which can completely simulate the UV spectra of sunlight, exposes materials to alternating cycles of UV light and moisture at controlled, elevated temperatures.It's most widely used weathering tester to test types of damages include colour change, gloss loss, chalking, cracking, crazing, hazing, blistering, strength loss and oxidation. The source adopts 8 pieces of UV lamps of 40W as the light source. The lamps are distributed on the two sides of machine, 4 pieces for each side (UVA-340 and UVB-313 optional).
ISO 4892 UV Weather Tester UV Accelerated weathering test chamber ASTM C1184
2.Standard
Common standard:ISO 4892-1 ,ASTM G151 ,ASTM G154 ,JISD0205• SAEJ2020
ISO 4892 UV Weather Tester UV Accelerated weathering test chamber ASTM C1184
3.Paint Standard
ASTM D3794 ,ASTM D4587 ,FED-STD-141B ,GM 9125P • JIS K 5600-7-8 ,ISO 11507 ISO 20340 ,M598-1990 ,NACE TM-01-84 ,NISSAN M0007 ,PrEN 927-6
ISO 4892 UV Weather Tester UV Accelerated weathering test chamber ASTM C1184
4.Adhesive glue Standard
ASTM C1184,ASTM C1442 ,ASTM D904 ,ASTM D5215 ,UNE 104-281-88
ISO 4892 UV Weather Tester UV Accelerated weathering test chamber ASTM C1184
5.Plastic Standard
ISO4892-3 ,ANSIC57.12.28 ,ANSI,A14.5 ,ASTMD4329 ,ASTMD4674 ,ASTMD5208 ,ASTMD6662 ,
DIN 53384 ,JUI K 3750 ,UNE35.104
ISO 4892 UV Weather Tester UV Accelerated weathering test chamber ASTM C1184
6.Roofing materials standards
ANSI/RMAIPR-1-1990 ,ASTM D4799 ,ASTM D4811 ,ASTM D3105 ,ASTM D4434 ,BS D5019
BS 903: PartA54 ,CGSB-37.54-M ,DIN EN534
ISO 4892 UV Weather Tester UV Accelerated weathering test chamber ASTM C1184
7.Printing,Ink material standards
ASTM D3424 ,ASTMF1945
ISO 4892 UV Weather Tester UV Accelerated weathering test chamber ASTM C1184
8.Fabrics Standards
AATCC TM 186 ,ACFFA Guideline

Product Parameters

Specification

Material of construction
Interior sizes	1130×500×400mm (WHD)
Exterior sizes	1300×500×1460mm (WHD)
Controller	LCD touch screen panel, programmable of temp., humid., UV(sun), spray(rain) and time
Machine compoments material	inner and outer 304# stainless steel
Sample holde	Aluminum alloy frame base
Irradiation lamp	8 pcs of UVA-340, For each 4pcs on each side
Number of specimens	48 pcs
Protection device	residual-current circuit breaker (RCCB) to control the warning for loop overload, thermal protection and water shortage protection.
Technical Parameters
Range of temp.	RT+10ºC~70ºC
Range of humidity	≥90%R.H
Temp. uniformity	±1ºC
Temp. fluctuation	±0.5ºC
Center distance between lamps	70mm
Center distance between samples and lamps	50±3mm
Adjustment	Test period for Temp., irradiation, condensation, spray can be adjustable
Lamp	UVA-340, L=1200/40W, 8pcs(average service life for 1600hrs)
Controller	Touch screen panel ,Youyi U740 Controller
Temp. control method	PID self-adjustable SSR control
Standard samples size	75×290mm( special parts optional)
Depth of water channel	25mm under auto-control
Available irradiation area	900×210mm
Wave length of UV	315-400nm
Test time	0~999H99min (adjustable)
Irradiation black panel temperature	50ºC~70ºC
Samples quanity can be placed on the holder	48pcs (for 52pcs also can be customized)
	Auto-spray for the machine structure
Structure introduction
Machine material	304SUS for the whole machine
	Single cycling system for air flue in the box, there's one inlet axis weeding machine which improves the flow amount of air, the heating ability and the whole temperature uniformity in the test machine.
Water source and consumption:	Tap water or distilled water for 8liters per day.
	Heating method is to heat liner water tank with fast heating speed and high temperature uniformity.
	Automatic water-supplying from liner which prevent the heating tube from damage.
Sample holder material	SUS304 or aluminium alloy steel
	High quality PU active wheel to fix the machine
	U-shape drainage used to drain water
	The surface of sample is parallel with the one of UV lamp
	auto-sprayer in the spray system, water pressure can be adjustable.
Safety protection device
Ground protection power source overload and short circuit breaker control loop overload and short circuit fuse protector water shortage protection thermal protection
Temperature control
UV: the primary optics reaction won't be sencetive to the changing temperature, while, the reaction speed under the second grade will acts closely to the changing temperature. Usually it will be faster as the heating-up, as a result, under the blazing sun of UV lighting, it's very important to control the temperature. The most important what we do is to set the testing temperature for accelerate test should match the highest temperature during the practical application, the temperature of 50ºC to 70 ºC depends on the lighting level and air temperature. Temperature adjustment of equipment is to control the air heating, water heating and other series action in the machine by the micro computer. Humidity: collapsing force from humidity to material will increase according to the rising temperature. So the temperature control is the basic requirement. In other words, to generate high speed is to keep high temperature environment during the humidity process, so the temperature of condensation should be set in the range of 40ºC to 60 ºC.
Heating system
a)high speed heating tube of U-shape titanium alloy; b)indepental temperature control system and lighting system; c)temp. control and output power controlled by micro computer with high accuracy and high efficiency. d)Thermal protection function of heating system. The black panel adopts the colorful touch screen controller or digital key pressing contorller to control the heating process. PID self-regulation, monitoring all adopt the standard PT100 temp. sensor of black panel. Temp. of water tank adopts the colorful touch screen touch screen program to control the heating, water tank locats at the bottom of tank, there is electronical heating device. During the test process, there's test phase is dark condensation which need to generate saturated steam of high temperature, when steam meet the cool templet, it condenses into water on its surface.
Equipment required condition
Temp.	5ºC~+32ºC
Humidity	≤85%
Power supply	AC220(±10%)V/50HZ
Power	3.8KW
Core compoments parts Remark: replacement of other parts in the same brand as material shortage.

Simulating Ultraviolet rays(UV)and sunshine
Although simulating ultraviolet rayis only 5% in the sunshine,it is the illumination factor which effects outdoors products durability declining.This is because sunshine photochemical reaction is increasing along with the wavelength reducing.When simulating the sunshine damaging the physical property of material,don't need to reappear the whole sunshine spectrum.In most situations,just need to simulate the short wave UV.
Fluorescent lamp advantage:quickly to get the result,simplified illuminance controlling,stable spectrum.
UVA-340 It's the best choice to simulate sunshine simulating ultraviolet ray.
UVA-340 Can simulate short wavelength range of the sunshine spectrum.The wavelength range is 295-360nm.
UVA-340 Only can produce the UV wavelength which can be found in the sunshine.

UVB-313,Used in accelerated test to the full extent.
UVB-313 can provide the test result quickly.Use the short wavelength which is more strong than the common UV wave.Alough these waves can accelerate the test more fastly to the full extent than the naterual UV wave,it will damage some materials.   
Standard definition:Launching luminous energy which wave is 300nm or below is lower 2% of total output luminous energy ,this is one fluorescent lamp,we always call it UV-A light.Launching luminous energy which wave is 300nm or below is larger 10% of total output luminous energy,we always call it UV-B light.UV-A wavelength is 315-400nm,UV-B wavelength is 280-315nm.
Simulating the effect of the rain and dew
   The time that outdoor material contacting humidity can be lengthened out to 12hours.The research results show that causing the outdoor humidity is dew not rain.Accelerated Weathering Tester uses a series of unique condensation theory to simulate outdoor humidity effects.In condensing circle of the chamber,there is a water storage tank in the bottom of the chambe and heating it to produce water steam.Hot steam make the chamber humidity is about 100%.This machine designs reasonable which can make sure the test sample can constitute of the chamber side wall,test back will expose in the indoor environment.
    Indoor air cooling will result in the surface temperature of the test sample lower several temperature. Difference in temperature will result in test sample surface generated liquid water in the condensation cycle. The condensation product is the stable pure distilled water..It can improve the test efficiency and avoid the water stain problem.
    Because the time that outdoor exposure touching humidity can lengthen out to 12 hours,the humidity period of Accelerated Weathering Tester will last several hours.We suggest every condensation period at least 12 hours.Please pay attention that UV exposure and condensation exposure proceeds respectively,it's consistent with the actual condition .  
 
Adopt light source
Use eight rated power rated 40W ultraviolet fluorescent lamp as the light source.The ultraviolet fluorescent lamp tube are distributed in the two-side of the chamber,each side has 4 lights.User can choose UVA-340 or UVB-313.
UV-A wavelength range is 315-400nm,tube luminescent spectrum energy focuses on 340nm.
UV-B wavelength range is 280-315nm,tube luminescent spectrum energy focuses on 313nm;
Because the ultraviolet fluorescent lamp output energy will reduce along with the time lengthening,in order to reduce the bad effect for the test because of energy attenuation,our test chamber every other ultraviolet fluorescent lamp 1/4 lifetime(tube lifetime is:1600H),we will change it a new tube,the replacing place is as below,the ultraviolet fluorescent lamps are constituted by new and old lights,and it will be a constant output light energy.

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