Fluorescent UV lamps are low-pressure mercury lamps with a wavelength of 254 nm, and the energy distribution of fluorescent UV lamps depends on the emission spectrum generated by phosphorus co-deposits and the amplification of glass tubes due to the addition of phosphorus co-deposits. Fluorescent UV lamps, like domestic and commercial lighting, have specific spectral bands. There are currently two types of fluorescent lamps, the fluorescent UVA (UVA-351 and UVA-340) and the fluorescent UVB (F40 and UVB-313).
The wavelength of UVA rays in fluorescent lamps is mainly concentrated between 340 and 370 nm, such as UVA-340 and UVA-351, the shortwave radiation of UVA-340 is very similar to direct sunlight below 325 nm, and the shortwave spectral distribution of UVA-351 is similar to that of sunlight through window glassThe peak wavelength of fluorescent UVB lamps (F40 and UVB-313) is around 313nm, and its energy is almost entirely concentrated between 280 and 360nm, and its energy distribution wavelength range is shorter than that of daylight, and there is almost no energy above 360nm. This is due to the fact that this light source has a large proportion of short-wave ultraviolet energy and lacks the energy of the long-wave ultraviolet and visible light fractions, therefore, the aging of the material under this light source may be related to:"Naturally"There was a big difference in the tests.
1 Purpose of the test.
Ultraviolet (UV) irradiation pretreatment is performed prior to thermal cycling and freezing of the module to determine the UV attenuation of the material and adhesion connections.
2 Test setup.
a) Equipment that can control the temperature of the component when subjected to ultraviolet irradiation, the temperature range of the component must be 60 5.
b) A device that measures the temperature of a recorded component with an accuracy of 2. The temperature sensor should be mounted on the front or rear surface close to the middle of the assembly, and if more than one component is being tested at the same time, only one representative of the component needs to be monitored for temperature.
c) Instruments capable of testing UV irradiance irradiance irradiated into the test plane of the module with wavelengths ranging from 280nm to 320nm and 320nm to 385nm with an accuracy of 15%.
d) An ultraviolet radiation source with an irradiance uniformity of 15% on the component test plane and no detectable radiation of a wavelength of less than 280 nm that produces the required irradiance in the spectral range of interest specified in item 3 below.
3 Test Procedures.
a) Measure the irradiance on the test plane of the component using a calibrated radiometer, ensuring that the irradiance at wavelengths between 280 nm and 385 nm does not exceed.
250 W·m-2 (approximately 5 times the natural light level) with 15% irradiance uniformity over the entire measurement plane.
b) Install the open-circuit component onto the measurement plane at the location selected in step a), perpendicular to the UV light. The temperature range of the components is guaranteed to be 60 5.
c) The ultraviolet radiation of the module in the range of 280nm to 385nm is 15kwh·m-2, of which 3%-10% is the amount of ultraviolet radiation in the range of 280nm to 320nm, and the temperature of the module is maintained in the range specified above during the test.
4 Final Test.
Tests that repeat visual inspections, maximum power determinations, and insulation tests.
5 Test Requirements.
The following requirements should be met:
1) No serious appearance defects;
For design appraisal and finalization, the following defects are serious cosmetic defects:
a) Crushed, cracked, or desorbed outer surfaces, including upper layers, lower layers, frames, and junction boxes;
b) Curved, irregular exterior surfaces, including the upper layer, lower layer, bezel and junction box, which are irregularized to such an extent that they interfere with the installation and/or operation of the components;
c) A crack in a cell whose extension may result in more than 10% of the cell's area being reduced from the module's circuitry;
d) Formation of a continuous bubble or delamination channel between the edge of the component and any part of the circuit;
e) Loss of mechanical integrity, resulting in compromised installation and/or operation of the component.
2) The attenuation of the maximum output power does not exceed 5% of the pre-test value;5%；
3) The insulation resistance should meet the same requirements as the initial test.
1. Horizontal design to ensure the effective stability of the light source;
2. Double door lock joint control to ensure no ultraviolet light leakage;
3. The open inner compartment design ensures the exchange of air with the outside world
4. Special guide rail, convenient for components to be pushed in and out;
5. Electric heating technology, using bang-bang control theory for precise heating;
6. The infrared temperature sensor accurately measures the surface temperature of the component, and the test accuracy is 00.5℃；
7. Voltage signal control ballast, amplitude modulation 5% 100% 5% 100% 100%;
8. Imported sensor, built-in signal amplification system to reduce the influence of external interference signals.
9. Each group of sensors controls a group of ballasts to control two light sources
10. Real-time monitoring of irradiance, automatic compensation of irradiation intensity to ensure uniformity and accuracy;
11. Temperature (frequency conversion air cooling) control, high control accuracy coefficient, temperature tolerance within 3;
12. The ballast has the function of lamp start protection and provides lamp status alarm.
1. Temperature range: RT 10 80
2. Temperature deviation: 2
3. Temperature fluctuation: 05℃
4. Ultraviolet wavelength: 280 400nm UVA: 280 320nm UVB: 320 400nm
5. Wavelength accuracy: 15%.
6. Ultraviolet radiation 280nm 320nm: 5-75kw·h/w²
280nm～385nm：15kw·h/w²
7. Irradiance uniformity: 15%.
8. Test time: 0 9999h adjustable.
9. Ultraviolet light is adjustable alternately between continuous and interstitial time.
1. UVA-340 fluorescent ultraviolet lamp is used as the light source, and the accelerated weather resistance test of photovoltaic modules is carried out by simulating the ultraviolet radiation in natural sunlight to obtain the results of material weather resistance.
2. It can automatically monitor temperature and light irradianceEquipped with a radiometer, the irradiance can be controlled and corrected, so that the irradiance is stabilized at the specified illuminance, and the test time is controlled at the same time.
1 Light Source Light Source:
The light source adopts several special ultraviolet fluorescent lamps with rated power, and the distance between the center of the lamps is arranged irregularly and horizontally, with reference to the recommended conditions of peers and the conditions of GB T 14522-1993, to ensure the uniformity of radiation.
Since the energy output of fluorescent light will gradually decay with time, in order to reduce the impact of the test caused by the attenuation of light energy, as well as the requirement of 15% of irradiation uniformity, Yuqing Electric Technology has developed a special dimming hardware for ultraviolet fluorescent lamps, so as to obtain a constant output of light energy.
Under normal circumstances, the effective service life of the lamp can be about 1600 1800 hours. Because the instrument is equipped with special dimming hardware for ultraviolet fluorescent lamps developed by Shangnai company, the irradiance of the attenuated lamp can be compensated, so that the service life of the lamp can be extended to about 2000 3500 hours.
2 Electrical Control Electrical Control:
2.1. Sensor: As the most important monitoring component, the sensor is the core area of automatic control, and Yuqing Electric Technology selects imported integrated integrated sensors to effectively detect ultraviolet radiation. The unique built-in signal amplification function minimizes the influence of temperature and harmonics.
2.2. Choose industrial control touch screen + PLC programmable controller or host computer + special PCB hardware control for automatic control of temperature, irradiance, irradiation, test time, etc.
It has the function of storing and printing test conditions or results such as irradiance, temperature, time, etc., as well as working curves.
Human-machine dialogue, high degree of automation, fully realize the automatic monitoring of irradiance.
According to user requirements, the upper computer control, external PC computer, Windows XP operation interface, to achieve working curve and data storage and printing functions.
Unlimited time control, with accumulated time and power failure memory functions.
After the test is completed, the test indicator mounted on the control panel gives a warning signal to stop the test.
Irradiance uniformity: within 15% (at the surface of the sample).
Temperature monitoring: The SUV-PV() uses a standard PT-100 temperature sensor to accurately control the ambient temperature of the test process, and an infrared temperature sensor to monitor the surface temperature of the sample.
2.3. The special dimming hardware for ultraviolet fluorescent lamp + philips ballast or special program control ballast developed by Yuqing Electric Technology Co., Ltd. is 5% 100% continuously adjustable to ensure automatic compensation of energy when the energy of the light source is attenuated.
2.4. Safety alarm protection device:
When the temperature in the box exceeds the set limit, the machine will automatically cut off the power supply of the lamp and heater**, and enter the equilibrium state to cool, with an audible alarm.
Automatic alarm function for insufficient irradiated energy.
Fault recording function, each fault is recorded on the operation screen, which is convenient to check and find out the problem.
Protective door lock (option): There is a UVB light source during the test, and a large amount of UVB light source can cause erythema effect in some people with allergies, and people with allergies should reduce their exposure to ultraviolet light. If the lamp is on, once the compartment door is opened, the machine will automatically cut off the power supply of the lamp, and automatically enter the equilibrium state to cool down, so as to avoid human injury, the safety door lock meets the IEC047-5-1 safety protection requirements. Strengthens the tightness of the door lock so that the leakage is less than 10% of the UV intensity in the glass window where the sunlight penetrates the glass every day.
2.5. Irradiance and irradiance:
IEC 61345-1998 UV light source has a wavelength in the range of 280nm to 320nm 75kw·h m2 or 320nm 400nm range 15kw·h m2
IEC 61215-2005 UV light source wavelength in the range of 280nm 320nm at least 5kw·h m2, 280nm 385nm range 15kw·h m2, IEC61646-2008 the module is subjected to ultraviolet radiation in the range of 280nm to 400nm is 15kwh·m-2, of which 3%-10% is 280nm to 320nm The amount of ultraviolet radiation in the wavelength range maintains the temperature of the component within the previously specified range during the test. And no irradiance below 280nm is guaranteed.
When IEC 61345 is executed, set the irradiation of 280 320nm 75 kw·h m2 or 320 400nm irradiation 15 kw·h m2;When IEC 61215 is executed, the irradiation of 280 320nm is set to 5 kw·h m2 and 320 385nm irradiation is set to 15 kw·h m2, respectively. IEC 61646 is used to set the irradiation of 280 400nm to 15 kw·h m2. Once the parameters are entered, the instrument will automatically complete the test.
3. Structural production
3.1. Box shell material: high-quality Baosteel A3 plate spraying.
3.2. Liner material: Imported SUS 304 stainless steel brushed hairline plate.
3.3. The heating method is nickel alloy tube finned heating, which heats up quickly and the temperature distribution is uniform.
3.4. The door is open on the left side, which is easy to open and close and convenient for the access of components.
3.5. The UV lamp adopts a combined lamp stand, and the lamp tube is arranged in a combination and is easy to install.
3.6. The bottom of the test chamber adopts high-quality fixed PU movable wheels.
3.7. Considering the uniform temperature distribution, the temperature circulation air duct is designed, and the low-noise motor and centrifugal wind wheel can effectively make the temperature quickly distributed and circulated.
3.8. The surface of the sample is designed parallel to the ultraviolet radiation. The sample is placed on one side of the lamp and a reflector on the other. Efficient use of lamp energy;
4. Overview of the whole machine:
Inner chamber size: about W2200mm D600mm H1300mm (special specifications customized).
5. The working environment conditions required by the instrument host are:
Power requirements: 220V 5%, single phase three-wire, 50Hz, 10A2P air switch.
Suggested use environment: 5 35, low humidity, good ventilation, clean indoor environment.
6. Instrument accessories.
A set of ultraviolet radiation intensity measuring instrument (for external calibration), UVA, UVB lamps (spare consumables).
Start planning for my 2024