Abstract
In environments where electronic and electrical products, automotive components, and lamps operate, dust accumulation and infiltration often lead to performance degradation, functional failures, or shortened service life. The dustproof testing machine, as a core equipment for simulating dust climate conditions, plays a crucial role in verifying product dustproof performance and guiding product design optimization. This paper takes the LISUN SC-015 Dustproof Testing Machine (Sand Dust Chamber) as the research object, systematically elaborates on its application scope, compliance standards, structural design, technical specifications, and test implementation methods. Through detailed analysis of its functional characteristics and practical application value, this paper aims to provide a comprehensive reference for researchers and engineers engaged in product dustproof performance testing and quality control.
1. Introduction
With the rapid development of industries such as electronics, automotive, and lighting, products are increasingly required to adapt to complex and harsh environmental conditions. Dust, as a common environmental factor, poses a serious threat to the stable operation of products. For example, dust entering electronic components may cause poor contact; dust accumulation on lamp heat sinks can reduce heat dissipation efficiency and lead to overheating burnout; dust infiltration into automotive engine parts may accelerate wear and tear. Therefore, evaluating product performance under simulated dust climate conditions has become an indispensable link in product development, improvement, and factory inspection.
The dustproof testing machine realizes the simulation of dust climate by creating a closed test environment with controllable dust concentration, temperature, and vacuum conditions, thereby testing the physical and related performance of products. Among numerous dustproof testing equipment, the LISUN SC-015 Dustproof Testing Machine stands out due to its compliance with international and national standards, precise control performance, and humanized structural design. It is widely used in IP5X and IP6X dustproof tests of various products, providing reliable data support for product quality verification.
2. Application Scope of LISUN SC-015 Dustproof Testing Machine
The LISUN SC-015 Dustproof Testing Machine is mainly applied to physical and other related performance tests of products under simulated dust climate conditions. Its application scope covers multiple industries and product types, specifically including the following categories:
• Electronic and electrical products: Such as integrated circuits, capacitors, resistors, power supplies, and communication equipment. These products have high requirements for internal cleanliness, and dust infiltration can easily cause short circuits, signal interference, or performance attenuation. The dustproof testing machine can verify whether their enclosures and sealing structures can effectively block dust.
• Lamps and lighting equipment: Including indoor and outdoor lamps, street lamps, and automotive headlights. Outdoor lamps are particularly vulnerable to dust erosion, which can reduce light transmittance and lighting efficiency. The test can evaluate the dustproof performance of lamp housings and glass covers.
• Electrical cabinets and components: Electrical cabinets used in industrial sites and power systems need to prevent dust accumulation from affecting the operation of internal electrical components. The testing machine can simulate the dust environment in industrial workshops to test the sealing performance of cabinets.
• Automobiles and motorcycle parts: Such as engines, transmissions, sensors, and instrument panels. Automobile parts work in dusty road conditions for a long time, and dustproof performance directly affects the safety and service life of vehicles. The test can verify the dust resistance of parts under different working conditions.
The core purpose of using the LISUN SC-015 Dustproof Testing Machine is to verify whether the product performance meets the preset requirements through post-test measurement and evaluation, thereby providing a basis for product design optimization, technical improvement, and factory quality inspection.
SC-015_Dustproof Testing Machine | Dust Proof Chamber
3. Compliance Standards of LISUN SC-015 Dustproof Testing Machine
To ensure the authority and comparability of test results, the LISUN SC-015 Dustproof Testing Machine strictly complies with a series of international and national standards related to dustproof testing. These standards specify the technical requirements, test methods, and evaluation criteria for dustproof tests, providing a unified framework for the application of the testing machine. The main compliance standards are shown in Table 1.
| Standard Code | Standard Name | Scope of Application |
|---|---|---|
| IEC 60529:1989 +A1:1999 +A2:2013 | Degrees of protection provided by enclosures (IP Code) | Defines the IP protection rating system for enclosures, including dustproof tests for first characteristic numerals 5 and 6 (IP5X and IP6X) |
| GB/T 4208 | Degrees of protection provided by enclosures (IP Code) | National standard corresponding to IEC 60529, applicable to dustproof performance testing of enclosures in Chinese markets |
| IEC 60598-1 | Luminaires – Part 1: General requirements and tests | Specifies general requirements and test methods for lamps, including dustproof performance tests for lamps |
| GB/T 7000.1 | Luminaires – Part 1: General requirements and tests | National standard corresponding to IEC 60598-1, applicable to dustproof testing of lamps in China |
| IEC 60068-2-68 | Environmental testing – Part 2-68: Tests – Test L: Dust and sand | Provides detailed specifications for dust and sand environmental tests, including test equipment, dust types, and test procedures |
| GB/T 2423.37 | Environmental testing – Part 2-68: Tests – Test L: Dust and sand | National standard corresponding to IEC 60068-2-68, guiding dust and sand tests of products in China |
| GB/T 4942.2 | Degrees of protection provided by enclosures for low-voltage apparatus | Focuses on the protection performance of enclosures for low-voltage electrical equipment, including dustproof requirements |
| DIN 40050 | Road vehicles — Degrees of protection (IP code) | Applies to the IP protection rating test of automotive components, specifying dustproof test requirements for vehicle-related products |
Among these standards, IEC 60529:1989 +A1:1999 +A2:2013 is the most core reference. Its clause 13.4 clearly stipulates the dust test method for first characteristic numerals 5 and 6, requiring the use of a dust chamber that can maintain talcum powder in suspension. The LISUN SC-015 fully meets the requirements of this standard in terms of dust circulation, dust specifications, and test conditions.
The technical specifications of the LISUN SC-015 Dustproof Testing Machine determine its test capability and accuracy. Its key parameters are detailed in Table 2.
| Technical Parameter | Specification Details |
| Temperature Range | RT+10~50℃ (RT refers to room temperature) |
| Dust-related Parameters | – Test dust: Dry talcum powder – Metal screen standard: Wire diameter 50μm, gap width 75μm – Dust dosage: 2~4kg/m³ – Dust drop method: Free falling |
| Time Control | – Total test time: 0~999H (adjustable) – Vibration time: 0~999H (adjustable) – Time accuracy: ±1 second |
| Vacuum System | – Vacuum range: 0~10Kpa (adjustable) – Pumping speed: 0~4800L/H (adjustable) |
| Sample Power Connection | Refer to the rated input of the sample, maximum current not exceeding 10A |
| Working Room Size | 100015001000mm |
| Working Power Supply | 380V/50Hz Three Phases (60Hz optional) |
| Safety Protection | Leakage protection, short-circuit protection |
These parameters ensure that the testing machine can simulate different dust intensity and environmental temperature conditions, adapting to the test needs of various products. For example, the adjustable vacuum range allows testing of enclosures with pressure differences (Category 1 enclosures) and those without (Category 2 enclosures) as defined in IEC 60529.
4.2 Structural Design Features
The structural design of the LISUN SC-015 Dustproof Testing Machine fully considers test practicality, operability, and equipment durability, with the following key features:
• Shell and Inner Chamber Material: The outer shell is made of high-quality domestic steel plate with a painted surface, which is both aesthetically pleasing and corrosion-resistant. The inner chamber, sample rack, and other components in contact with dust are made of stainless steel plates, ensuring long-term rust prevention and avoiding dust contamination caused by equipment corrosion.
• Observation and Lighting System: The door of the testing machine is equipped with a transparent tempered glass observation window, and an LED lighting lamp is installed inside the chamber. This allows operators to clearly observe the sample state and dust distribution during the test without opening the chamber, ensuring the continuity and stability of the test environment.
• Dust Replacement and Anti-condensation Device: A dust replacement device is installed at the bottom of the chamber, enabling 100% replacement of used dust. Since IEC 60529 requires that talcum powder should not be used for more than 20 tests, this device ensures the freshness and consistency of test dust. In addition, a vibration device is equipped to prevent dust from sticking to the chamber wall and condensing, and its working time can be adjusted for automatic alternating operation. The circulating air duct is also equipped with a heater (muffler mica sheet heating ring), which heats the dust to avoid condensation caused by temperature changes.
• Vacuum and Suction System: The chamber is equipped with a suction pipe, which can complete the vacuum action on the sample (the sample needs to reserve a suction hole). The vacuum system is composed of a vacuum pump, air filter, flow meter, and pressure regulating triplet, ensuring stable and adjustable vacuum pressure to meet the test requirements of Category 1 enclosures.
• Control System: The testing machine adopts a 7-inch touch screen + Panasonic PLC control system, which can independently control the dust blower, dust vibration, and total test time. It supports three key control functions: ① Continuous or periodic dust blowing time setting; ② Automatic alternation of vibration and stop vibration time; ③ Preset test time (maximum 99 hours and 59 minutes). The human-machine interface is intuitive and easy to operate, improving test efficiency and parameter setting accuracy.
The test implementation of the LISUN SC-015 Dustproof Testing Machine follows the requirements of IEC 60529 and other standards, and the specific process is as follows:
• Dust Preparation: Select dry talcum powder that can pass through a metal screen with a wire diameter of 50μm and a gap width of 75μm. Calculate the dosage according to 2~4kg per cubic meter of the test chamber volume, and ensure the talcum powder has not been used more than 20 times. Meanwhile, comply with health and safety regulations when selecting and using talcum powder.
• Sample Installation: Classify the samples according to enclosure categories. For Category 1 enclosures (with internal pressure lower than ambient pressure during normal operation), install the sample in the test chamber, connect the suction pipe to the special test hole (near vulnerable parts) or cable inlet hole of the sample, and other holes (such as drain holes) are treated as normal use. For Category 2 enclosures (no pressure difference), directly place the sample in the chamber. Connect the sample power supply according to its rated input, ensuring the current does not exceed 10A.
• Equipment Parameter Setting: Use the touch screen to set parameters such as test temperature (RT+10~50℃), dust dosage, dust blowing time (continuous or periodic), vibration time, total test time, and vacuum pressure (if applicable). Start the heater to preheat the chamber to the set temperature to avoid dust condensation.
• Start the dust circulation system: The powder circulation pump (or alternative device) blows the talcum powder into the chamber, and the vibration device starts simultaneously to maintain dust suspension. The heater in the circulating air duct keeps the dust at the set temperature.
• Maintain test conditions: During the test, monitor the vacuum pressure (for Category 1 enclosures) through the pressure gauge, and adjust the pumping speed if necessary to keep the pressure stable. Observe the sample state and dust suspension through the observation window, and ensure the equipment operates normally without leakage.
• Alternate operation of functional devices: The dust blowing and vibration devices operate alternately according to the preset time to simulate the dynamic dust environment. The control system automatically records the test time with an accuracy of ±1 second.
• Stop the test: After reaching the preset total test time, sequentially turn off the dust blower, vibration device, heater, and vacuum pump.
Sample handling: Take out the sample after the dust in the chamber settles, and carefully remove the surface dust without damaging the sample or causing internal dust to overflow.
• Performance evaluation: Test the physical and functional performance of the sample according to the relevant product standards, such as checking whether electronic components have poor contact, whether lamps have reduced light output, and whether automotive parts have increased friction. Evaluate whether the product meets the IP5X or IP6X dustproof requirements based on the test results.
In addition to the standard SC-015 model, LISUN also provides customized services according to customer needs. For example:
• Size customization: Other working room sizes or walk-in dustproof chambers can be designed to accommodate large samples such as complete automotive chassis or large electrical cabinets.
• Test standard extension: Customize equipment for IP5KX and IP6KX tests according to ISO 20653 Figure 1 (model numbers SC-010-56K, SC-015-56K, SC-020-56K), and optional Arizona A2 dust (with additional cost) to meet higher-level dust test requirements.
The LISUN SC-015 Dustproof Testing Machine has been on the market for more than 10 years, and the engineer team has summarized a large number of after-sales FAQs. Users can obtain solutions to common problems through the official website link, enabling self-troubleshooting during use. LISUN continuously updates the FAQ page to provide more comprehensive technical support. In addition, the company provides calibration certificates for different models (SC-010, SC-015, SC-020, SC-500) to ensure the accuracy and traceability of test data.
7. Conclusion
The LISUN SC-015 Dustproof Testing Machine, as a professional equipment for simulating dust climate conditions, has a wide application scope covering electronics, automotive, lighting, and other industries. It strictly complies with international and national standards such as IEC 60529 and GB/T 4208, with precise technical parameters and humanized structural design. Its adjustable temperature, vacuum, and dust control systems enable accurate simulation of different dust environments, while the touch screen + PLC control system improves test operability and efficiency.
Through the standardized test process of pre-test preparation, test execution, and post-test evaluation, the LISUN SC-015 can effectively verify the dustproof performance of products, providing reliable data support for product design optimization and quality control. In addition, the customization service and perfect after-sales support further enhance its practical value.
In the context of increasingly stringent product quality requirements, the LISUN SC-015 Dustproof Testing Machine will continue to play an important role in improving product reliability and adapting to harsh environments, contributing to the development of high-quality products in various industries.
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