1. VOC test category
VOC test includes car VOC test: car air VOC test, car parts VOC test, car materials VOC test, tobacco VOC test, building materials VOC test, paint VOC test and other services.
2. Chemical analysis of restricted substances
Including ELV testing services: lead, cadmium, mercury, hexavalent chromium, PBB, PBDE, REACH's SVHC (substances of high concern) testing services and related training consulting services, GADSL testing services, polycyclic aromatic hydrocarbons (PAHs), phthalates, azo, dimethyl fumarate (DMFu) testing services, etc.
3. Volatile organic compound (VOC) test and odor analysis
(1) Voc test
VOC is the abbreviation of Volatile Organic Compound. When VOC reaches a certain concentration, it will cause headache, nausea, vomiting, fatigue and other symptoms. In serious cases, it may even cause convulsions, coma, damage to the liver, kidney, brain and nervous system, cause memory loss and other serious consequences, and may even cause cancer.
Testing () has experienced senior engineers in the industry, advanced volatile organic compound testing equipment and instruments, and provides comprehensive and professional VOC testing services for air, water, soil, various materials and products; At the same time, relying on its own strong technical force and advanced equipment to analyze the source of product odor, we will provide you with a complete solution.
(2) Odor analysis
Does your product give off an unpleasant smell when you open the package or use it? What substances are odors made of? From where? How to reduce or even eliminate the odor? With professional technology, we can solve the mystery and provide solutions for you.
| Viii. Equipment use environment |
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1. Temperature
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0~35ºC. |
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2. Relative humidity
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≤85%RH. |
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3. Atmospheric pressure
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86~106Kpa. |
| 4, There is no strong vibration around. |
| 5, no direct sunlight or direct radiation from other heat sources. |
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6, there is no strong airflow around, when the surrounding air needs to be forced to flow, the airflow should not be blown directly to the box.
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| 7,There is no strong electromagnetic field around. |
| 8, no high concentration of dust and corrosive substances around. |
| 9,The site is well ventilated. |
1) Temperature control principle
A sealed air layer is formed between the test chamber and the insulation shell. The air inside is forced to circulate quickly through the fan in the air duct. There are heating devices and refrigeration devices in the air duct. Because the air density is small, the specific heat is small, the mass is small, the drive energy is small, the temperature control is sensitive and efficient; And the whole test chamber is involved in heat exchange, so the temperature uniformity is very good.
2) Principle of temperature control
The purified air is divided into two ways into the test chamber through the proportional valve, and the humidity sensor is installed in the test chamber. According to the signal feedback of the sensor, the proportion of air flowing through the proportional valve humidification and dehumidification device is controlled, so as to achieve the purpose of rapid humidity control. The advantage of this control is that the device is all external, does not occupy the cabin space, improve the utilization rate of the equipment; Compared with the dew point control humidity method, the balance speed is more than doubled from simple replacement to bidirectional adjustment. The low temperature evaporation and humidification technology newly developed by the company has low energy consumption and no liquid water appears in the test box during the humidification process. Compared with the spray and packing of the dew point humidifier, the structure is simpler, more conducive to purification, and ensure the low background concentration in the test box.
3) Gas supply route organization flow chart
The air exchange rate can be set in the test chamber to realize air exchange through the clean air entering the outside world. The air path organization of the test chamber is as follows: The initially filtered air is driven by the air source and sent into the humidity pretreatment system, the water in the pipeline is placed, and then sent into the primary filter for pre-purification, and then into the large purifier for thorough purification (the purified air has been detected no formaldehyde, VOC), and then measured by the flow meter, into the proportional valve, according to the humidity requirements, according to the proportional through the humidification and dehumidification device, Then into the test chamber, and then from the test chamber to the outside.
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