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What to pay attention to for dust-proof test equipment

When the dust-proof test instrument fails, stop heating. After the test, turn off the operation switch first, and then turn off the main switch. The air temperature should be kept high enough.

1. Precautions for dust-proof test equipment
1. When the internal dust-proof test box fails, immediately stop heating and prompt the failure to indicate that there is an internal failure;
2. After the test is completed, first turn off the operating switch, then turn off the main switch, pay attention to the sand and dust rushing out when the door is opened for sampling;
3. The air temperature in the dust-proof test box should be high enough to ensure that the relative humidity in the box reaches 25% or lower. Put the samples at room temperature into the test box in the normal use position or in accordance with relevant regulations when they are not packaged, not energized, and ready for use. If it contains multiple samples, please be careful not to touch each other, and do not shield each other from dust;
4. Inject sand and dust into the test chamber to ensure that the specified dust concentration is maintained within the specified injection time or throughout the test period;
5. After the condition test is over, the sample remains in the test box until the sand and dust settle down;
6. The sample volume should not exceed 25% of the volume of the test box, and the sample base should not exceed 50% of the horizontal area of ​​the working space of the test box.

Second, how to choose dust-proof test equipment
1. The tightness of the test chamber should be good
2. The cross-sectional area of ​​the working space of the test chamber should be greater than 2 times the cross-sectional area of ​​the test sample, and the effective volume should be greater than 3.3 times the volume of the test sample
3. The dust-filled air is allowed to flow approximately laminar between acting on the test sample
4. The test chamber should be equipped with instruments and other auxiliary devices that can monitor and control the concentration of sand and dust, wind speed, temperature and relative humidity
5. There should be a sand separator so that the fan can circulate the air repeatedly without sand