What factors should be considered when purchasing a sand and dust test chamber?
I. Clarify the test requirements
1. Environment type: The type of sand and dust environment to be simulated needs to be clarified, such as continuous low-intensity sand and dust simulating a desert environment, or high-intensity sand and dust environments such as sandstorms.
2. Test cycle: Determine the test duration according to the product test requirements, such as a short-term 24-hour sand and dust exposure test, or a long-term durability test of hundreds or even thousands of hours.
3. Sample size and quantity: Measure the maximum size of the test sample and count the number of samples required for one test, so as to select a test box with appropriate capacity to ensure that the sample can be completely placed in the test box and the sand and dust can be evenly distributed around the sample.
II. Equipment performance and functions
1. Dust concentration adjustment: The test chamber should have the function of accurately adjusting the dust concentration to meet different test standards and product testing requirements, such as flexible adjustment between 10g/m³-100g/m³.
2. Uniformity: The uniformity of dust distribution in the chamber is crucial. It is necessary to ensure that the dust concentration and particle movement state at each position are relatively consistent during the test to ensure the accuracy and reliability of the test results.
3. Temperature and humidity control: In order to simulate the actual environment more realistically, the test chamber needs to have an independent and accurate temperature and humidity control system. The temperature control range is generally - 20-60, the humidity control range is 20%-90% RH, and the fluctuation range of temperature and humidity should be controlled within a small range.
4. Observation window and lighting: Equipped with a clear observation window with a wide field of view and lighting facilities with sufficient brightness and uniform distribution, it is convenient to observe the sample status in real time during the test without affecting the temperature, humidity and dust environment in the test chamber.
III. Material and structure
1. Box material: The outer shell is usually made of high-quality cold-rolled steel plate with plastic spraying, which has good corrosion resistance and appearance quality; the inner liner is mostly made of imported SUS304 stainless steel plate, which is easy to clean and corrosion-resistant, and can prevent sand and dust and water vapor during the test from damaging the box.
2. Sealing: Good sealing can not only prevent sand and dust from leaking, avoid pollution to the surrounding environment and affect the health of test personnel, but also ensure the stability of sand and dust concentration and environmental conditions in the test box, thereby ensuring the accuracy of the test results.
3. Durability: Pay attention to the overall structural design, manufacturing process and material selection of the equipment to ensure that the equipment can withstand the harsh conditions such as sand and dust erosion, temperature and humidity changes during long-term and frequent use, and maintain stable operation.
IV. Control system and operation
1. Control system: It should have an intuitive, simple and easy-to-operate control system, such as a programmable logic controller (PLC) with a touch screen control method, which can facilitate users to set and adjust test parameters, including dust concentration, wind speed, temperature and humidity, test time, etc.
2. Automation: Choose a test chamber with a high degree of automation, which can automatically complete the test process according to the preset program, reduce manual intervention, and improve test efficiency and consistency of results. For example, it can realize functions such as automatic dust blowing, vibration, temperature and humidity adjustment, and data recording.
V. Safety performance
1. Safety protection system: The equipment needs to be equipped with complete safety protection functions, such as emergency stop button, over-temperature protection, over-current protection, leakage protection, door lock mechanism, etc., to prevent safety accidents caused by equipment failure or misoperation during the test, and ensure the safety of operators and equipment.
2. Stability: The test chamber should have good stability during operation to avoid the impact of vibration, shaking and other factors on the test results. At the same time, it can also reduce the noise, wear and other problems caused by unstable operation of the equipment, and extend the service life of the equipment.
IV. Brand, after-sales and cost
1. Brand and reputation: Give priority to brands with good reputation and high awareness in the market. These brands usually have advantages in product quality, performance stability, technology research and development, etc., and can provide users with more reliable equipment and better services.
2. After-sales service: Understand the manufacturer's after-sales service system, including the warranty period of the equipment, maintenance response time, technical support capabilities, and accessories supply. Good after-sales service can ensure that problems encountered during the use of the equipment can be solved in a timely manner, reducing downtime and maintenance costs.
3. Price and cost: Comprehensively consider the performance, quality, function and other factors of the equipment, compare the prices of products from different manufacturers and brands, and choose a sand and dust test chamber with a higher cost performance. At the same time, the operating cost of the equipment, such as energy consumption, sand and dust replacement cost, maintenance cost, etc., must also be considered.
Installation procedures for sand and dust test chambers
1. The dust test chamber must be placed in a separate environment.
2. The equipment should be installed in a place with a temperature of 15~25 and a relative humidity of less than 85%, so as to ensure that the equipment will not be affected during the test.
3. It should be installed as close to the power supply as possible, and ensure that the power supply is well grounded, so as to better extend the life of the equipment.
4. It should be installed in a place without flammable materials around, so as to prevent the equipment from being damaged.
5. The equipment should be installed in a place without sunlight and with good ventilation.
6. The equipment needs professional personnel to manage and operate, and the box should be maintained and maintained regularly.
Daily maintenance of sand and dust test chamber
1. Clean and check the appearance of the equipment regularly
The exterior and interior of the sand and dust test chamber will be affected by dust, sand and other substances in the environment, so cleaning is an important part of daily maintenance. After each test, the equipment casing should be cleaned in time to avoid long-term accumulation of sand and dust. Especially in the air inlet, air outlet and filter, it is easy to be blocked by sand and dust, which will affect the normal operation of the equipment.
When cleaning, it is recommended to use a clean soft cloth or brush, and avoid using too rough tools to prevent scratching the surface of the equipment and damaging the equipment.
2. Check the functions of the equipment
The functions of the sand and dust test chamber involve many aspects, including heating system, humidity control, wind speed adjustment, etc. During daily maintenance, in addition to external cleaning, it is also necessary to regularly check whether these core functions are working properly. Check whether the heating system can effectively heat up and whether the temperature is stable; check the humidity control system to ensure that the humidity sensor and humidification system are fault-free; check whether the wind speed adjustment device is smooth and whether the fan is running normally.
Before each test, it is recommended to conduct a comprehensive functional check, especially when replacing new dust test samples or adjusting test parameters, to ensure that all functions of the equipment are in the best condition.
3. Regularly replace and clean the filter system
The filter system in the dust test chamber is an important part of ensuring the purity of the test environment and the long-term stable operation of the equipment. As the test progresses, the filter will gradually be contaminated by dust, resulting in poor airflow and may even affect the accuracy of the test. Therefore, it is recommended to check and clean the filter regularly. If the filter is found to be damaged or seriously contaminated, it should be replaced in time.
4. Check the electrical system
The electrical system is one of the core components of the dust test chamber. Regular inspection of the electrical system can effectively avoid equipment failures caused by line aging or short circuits.
5. Update and debug the software system
Modern dust test chambers are usually equipped with digital control systems that can accurately adjust various parameters of the test. In order to ensure the normal operation of the software system, users should regularly check the operating interface of the control system to ensure that the program and data are stored normally.
6. Troubleshooting and repair
Although the incidence of equipment failures can be greatly reduced through daily maintenance, various problems will inevitably occur in the equipment during long-term use. Common faults include unstable temperature, inaccurate humidity control, fan failure, etc. When encountering these problems, you should first check the electrical system, sensors, and control modules. If you cannot find the problem yourself, it is recommended to contact a professional maintenance personnel for fault detection and repair.
Conclusion
As environmental testing equipment, sand and dust test chambers are widely used to test the tolerance of various products in sand and dust environments. By understanding its characteristics, purchasing standards, installation regulations and daily maintenance, you can make an informed decision.
