Understanding the Importance of Sand Dust Testing for Electronic Devices

The sand dust testing mainly simulates the wind and sand weather in the natural environment, and then conducts the test, mainly testing the wind resistance and corrosion resistance of the wind and sand;
The sand dust test chamber is a testing equipment used to test the dustproof performance of electronic equipment. This testing machine is designed and manufactured in accordance with the relevant provisions of international standards IEC 60529 and GB/T 4208-2017, and can evaluate the dustproof ability of electronic equipment in various environments.

The sand dust test chamber needs to be operated according to standard procedures during testing. Firstly, place the tested electronic device in the testing room and close all switches, doors, and windows to avoid interference from external dust. Then, spray the tested equipment with the specified dust particle size and concentration, usually dry talc powder. Within a certain period of time, observe the shell of the tested equipment to determine whether there is dust entering it.

It should be noted that before using talc powder, it needs to pass through a straight line with a diameter of 50 μ m. Sieve size is 75 μ m。 The dosage of talc powder is 2kg per cubic meter of the test chamber volume, and the number of uses shall not exceed 20.

Why does the sand dust test chamber use talcum powder instead of simulating the dust test chamber?
Sand is very heavy in our natural life. When using sand and dust in the sand dust test chamber, it is difficult for the circulating fan and automatic tank inside the test chamber to blow sand dust into the upper part of the studio. Due to the irregularity of the sand body, it is not easy to enter the square hole of the sand chamber filter.

Moreover, blocking the screen is also easy. The reason why we used talc powder in the experiment is that it has a small weight, similar to sand, and is very delicate, making it easy to clean after the experiment.
So when we use a sand dust test chamber to test dust, real sand will not be used in the dust test chamber in natural life. Relatively speaking, using talcum powder has the same effect.

Why do we need to conduct a sand dust test?
Sand dust may become physical factors, chemical components, or both that promote the deterioration of materials or equipment components, and may also become wear materials for moving parts of equipment. Static surfaces may even be damaged by wind blown sand dust. This effect depends on the physical and chemical properties of dust particles and the properties of the contact surface.

Therefore, the covering layer on the metal surface may accelerate corrosion, while the accumulation of dust on the insulation surface may damage its electrical performance. So the emergence of dustproof test chambers has brought convenience to many enterprises.

Under the influence of high wind speeds, sand dust can become abrasives on stationary surfaces. Dust particles caused by driving vehicles can damage protective coatings or semi protective films of corrosive products, thereby accelerating corrosion of metal surfaces. So car lighting accessories also need to be tested for sand and dust using a dustproof test chamber.

The degree of surface wear depends on the speed of the invading particles relative to the surface. According to reports, the aircraft experienced significant deterioration in the optical properties of the windshield after a test flight in the desert of northern Africa with an altitude of 6 meters and wind speeds of 200 m/s to 320 m/s.

Wind carrying sand dust can roughen the surface of insulation materials or insulators, thereby damaging the electrical performance of the surface. The relative humidity is 50%, and according to measurements, the conductivity of phenolic plastic with a rough surface is 10 times higher than that of the same material with a smooth surface.

In summary, it indicates that both cars traveling on land and aviation equipment flying in the air need to undergo dust and dust level testing, so the dust test chamber plays a very important role in the production and development process of these electronic components.

Requirements for sand dust test:
To avoid blockage caused by sand and dust used in the experiment, the humidity of the test chamber must be maintained below 25%. It is not required that the testing equipment can monitor relative humidity. As long as the air inside the test chamber is heated, it is sufficient, and the heating temperature depends on the laboratory temperature and relative humidity. It may not be feasible in humid and hot weather conditions, therefore it is not recommended to test at temperatures exceeding 40 ℃.

The necessity of sand dust test chamber:
With the continuous deterioration of the natural environment, dust has brought great harm to human survival and production, mainly affecting products under modern industrial production. So in order to enhance the quality and reliability of their products, manufacturers have all invested in sand and dust testing of their products. So when the sand dust test chamber appears, it provides manufacturers with a time-saving, labor-saving, faster, and more convenient platform for achieving test objectives.

Let’s analyze the adverse effects of dust used in sand and dust tests on production processes, product quality, economic benefits, environment, and ecological balance. The impact on economic benefits.
Mainly manifested in the reduction of product quality, relatively lower product qualification rate, and lower product price; The service life of the test chamber equipment will gradually shorten, leading to an increase in fixed asset investment, a gradual increase in product costs, and a weakening of market competitiveness;

The loss of work ability of occupational patients caused by dust, as well as the increase in medical expenses, nursing expenses, and health welfare expenses; Working in high concentration dust workplaces, users are concerned about their health and lose their ability to work earlier than normal, which accelerates the training cycle for technical personnel in enterprises, increases training costs, and also leads to unstable labor productivity.

The harm and energy of dust are so great that if we cannot eliminate it, we can only start from our own prevention. In terms of living environment, we should use various ways to isolate dust and minimize harm to human body and the impact on survival. In industrial production and other aspects, we can use the sand and dust test chamber in the dust environment to conduct dust prevention, dust resistance and other tests on products, to enhance product quality and usability, Improved economic benefits.

SC-015 Dust-proof Test Chamber (Sand Dust Chamber) is applied to physical and other related performance tests for electronic and electrical products, lamps, electrical cabinets, electrical components, automobiles, motorcycles and their parts and other products under simulated dust climate conditions. After the measurement, it is judged whether the performance of the product meets the requirements through verification, so as to facilitate the design, improvement, verification and factory inspection of the product. Comply meets IEC60529:1989 +A1:1999 +A2: 2013 <Degrees of protection provided by enclosures (IP Code)>,IEC60598-1,  GB2423.37-89 (Test L: dust test methods), GB4208, GB/T 4942.2-93(protective casing grade of low-voltage apparatus), GB7000.1 <Luminaires Part 1: General Requirements and Tests> 9.2.1, 9.2.2 and Figure 6, DIN40050 and IP5K0. The dust test chamber is applicable to the IP5X and IP6X dustproof test of the products.

Dustproof Testing Machine SC-015

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