Yellowing resistance UV test chamber professional equipment testing

If there are oil resins containing double bonds in wood coatings, yellowing will also occur due to the oxidation of the double bonds to produce chromophoric groups. In addition, factors such as wood substrates can also induce yellowing, such as tannins and resins contained in the wood, and bleach residues on the surface.
Accelerated test conditions
Lamp source
Test
1. Specific technical parameters
, model: ZH
, studio size㎜
, appearance Size: ㎜
, box temperature range: R＋℃～℃
, temperature uniformity: ℃
, temperature fluctuation: ℃
, blackboard temperature: ( ) ℃
/> , Temperature control method: D self-adjusting temperature control method
, Lamp center distance: ㎜
, Sample and lamp distance: mm, two sets of sample trays, the distance to the surface of the lamp can be adjusted up and down
, UV wavelength
, lamp power
, total number of lamps: branches
, irradiance/dry phase (no condensation)
, simulated UV light Adjustable range of exposure time~H
, total power: .
, power supply: (%)/HZ two-phase three-wire system
2. Box structure
, box shell material The steel plate is sprayed with plastic
. The inner tank material is made of imported stainless steel plate
. A total of domestic ultraviolet lamps are installed on the top of the working room
. The cover of the test part is a single-sided flip-top type, which can be opened It can be closed easily
, the bottom of the test chamber adopts high-quality fixed movable wheels
, two sets of sample trays, and the distance to the surface of the lamp can be adjusted up and down.
3. Heating system
Using high-grade nickel-chromium alloy wire far-infrared high-speed heater
Completely independent system, does not affect the test and control circuit
Temperature control output power is uniform It is calculated by a microcomputer to achieve high-precision and high-efficiency electricity consumption
. It has the anti-over-temperature function of the heating system
. The temperature is controlled by an intelligent three-yuan series Korean temperature controller, and the output power is uniform. Calculated by microcomputer, D is self-tuning. Monitoring adopts standard temperature sensors
4. Circuit control system
Intelligent ternary series Korean temperature controller, control accuracy. ℃
Temperature control adopts +, and the system coordinates control on the same channel , can improve the stability and life of control components and interfaces
, touch settings, digital and direct display
, with automatic calculation function, can reduce the inconvenience caused by manual settings
br/> , The lighting control time can be set arbitrarily within a thousand hours
, During operation or setting, if an error occurs, a warning signal will be provided
, French Schneider components
, Philips rectifier and starter (to ensure that the UV lamp can be lit every time it is turned on)
, equipped with a radiometer to detect the irradiance in the box at any time.
5. Light source
The light source uses a series of ultraviolet fluorescent lamps with a rated power of Near the wavelength
6. Safety protection device
If the lamp is on and the door of the box is opened, the machine will automatically cut off the power supply to the lamp and automatically enter a balanced state for cooling to avoid harm to the human body.
. Over-temperature protection in the box. When the temperature in the box is too high, the machine will automatically cut off the power supply and enter a balanced state for cooling