Operation Guide for Calibration Specification of Dustproof Test Chamber

The dustproof test chamber is a device that uses artificial simulation systems to test products using talcum dust as the medium. It is widely used in fields such as LED lighting fixtures, automobiles and automotive accessories, communication equipment, etc.

This test chamber 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.

How long does the dustproof test chamber vacuum for?
1. If the extraction speed is less than 40 times the volume of the measured shell, then the extraction is carried out to 80 or 8 hours of the measured shell volume. One condition is that it does not exceed 2KPA.

2. If the pumping speed is 40-60 times per hour, the pumping time is 2 hours. If the measured shell capacity is 10L, it is 60L per minute and 6L per minute.

The dustproof test chamber is a powder circulation pump in a closed test chamber that can be replaced by other methods that can suspend talc powder.

Test method for dustproof test chamber:
The dust test needs to be carried out 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.

In short, the dustproof test chamber is a useful testing device that can help manufacturers and consumers understand the dustproof performance of electronic devices and improve product competitiveness.

Operating Guidelines for Calibration Specifications of dustproof test chambers:
1. Before calibration, it is necessary to prepare some relevant equipment, such as standard dust measuring cup, dust generator, voltmeter, thermometer and hygrometer, etc. When conducting calibration, it is necessary to adjust the temperature, humidity, and dust concentration inside the test chamber to the standard state.

2. It is voltage calibration. Voltage calibration is one of the basic calibrations of dust proof test chambers. When the voltage inside the test chamber is inconsistent with the standard voltage, it can lead to errors. Therefore, it is necessary to use a voltmeter to calibrate the voltage inside the test chamber to ensure that it is consistent with the standard voltage.

3. Next is temperature and humidity calibration. The test results of the dustproof test chamber are greatly affected by the environmental temperature and humidity, so it is necessary to calibrate the temperature and humidity inside the test box during calibration.

The calibration method is generally to use a standard temperature hygrometer to read the temperature and humidity of the test chamber, and compare with the reading of the standard temperature hygrometer, and adjust the temperature and humidity value inside the test chamber to make it consistent with the standard value.

Dust concentration is one of the core indicators for dust prevention test chamber testing. The commonly used standard dust measuring cup method is an effective method for calibrating dust concentration.

The specific operation steps are as follows: open the dust generator inside the test chamber, generate a specified amount of dust, and collect samples; Pour the standard dust from the standard dust measuring cup into the sample; Calculate the dust concentration inside the test chamber by comparing the dumping time of standard dust and adjust it to the standard value.

Regular maintenance of dustproof test chamber:
1. Cleaning and inspection of equipment appearance is one of the key points of maintenance. The surface of the equipment should be regularly cleaned of dust, mold, and other dirt, and the appearance of the equipment should be checked for cracking or aging.

If these problems are found, immediate maintenance or replacement of relevant components should be carried out to avoid affecting the normal use of the equipment.

2. The cleaning and lubrication inside the equipment is also an important part of the regular maintenance of the sand and dust testing machine.

It is necessary to regularly clean the protective covers, filters, fans and other components inside the equipment, and lubricate the components after cleaning to ensure smooth operation and efficient operation of the equipment during use.

3. In addition to regular cleaning and lubrication, the adjustment and calibration of the dustproof test chamber is also an important part of maintenance. During the use of the equipment, corresponding adjustments and calibrations need to be made according to the needs of the equipment.

For example, it is necessary to regularly check the temperature and humidity parameters of the equipment, and make corresponding adjustments and calibrations to ensure the accuracy and reliability of the test results.

Issues to consider when purchasing a dustproof test chamber:
1. We need to consider the performance indicators of the equipment. For the dustproof test chamber, the main performance indicators include: filtration efficiency, air volume, noise, temperature range, etc. We need to select a sand and dust test chamber with good performance based on the specific requirements of the experiment.

2. We need to consider the brand and quality of the equipment. In the market, there are many brands of dustproof test chamber, and the quality is also uneven. Therefore, it is normal to compare products with three different suppliers, and choose trustworthy brands and suppliers with good after-sales service.

3. We also need to consider the selection of dustproof test chamber not only considering the performance and quality of the equipment itself, but also considering the balance between experimental cost and effectiveness. Therefore, it is necessary to fully consider the costs required for long-term equipment use and maintenance, and choose based on actual needs and budget.

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.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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