Dust test chamber on the placement and requirements of the test workpiece
The dust test chamber test workpiece is exposed to vertical rather than laminated and contains a specified amount of dust. To this end, the test should be stirred with dust and blow into the sealing test chamber. If the relevant specifications are provided, the sample should be connected to the vacuum pump, so that the gas in the dust-containing test chamber enters the sample through the gap, cannula or other similar components. Pressure reduction can be adjusted and monitored and the extra gas rate should be measured.
The dust test box root has the operating conditions of the sample. The sample housing can be divided into two types:
Type 1: The pressure in the sample housing may differ from the outside atmospheric pressure, for example due to the air pressure caused by the thermal cycle in the operation. For samples with type 1 housing, place the test chamber, and mounted according to the normal use position, connect the vacuum pump to make the internal pressure of the sample below atmospheric pressure. To this end, a suitable hole should be provided on the outer casing, and if there is a drain hole on the sample wall, the vacuum tube should be connected to the hole without re-punch. If the drain holes are more than one, the vacuum tube should be connected to one of the holes, and the other holes should be sealed during the test.
Type 2: The air pressure in the sample housing is the same as the external air pressure. For samples with type 2 housing, place the test chamber and install it according to normal use. All open holes are kept open.
Dust test chamber For testing requirements and solutions, the technical expert in Nanjing Rencai is listed for you:
1. The sample volume should not exceed 25% of the test chamber volume, sample base It should not exceed 50% of the horizontal area of the test chamber.
Second, if the sample size does not meet the previous one, the relevant specifications should specify the following methods:
nbsp ; 1, test the sealing portion of the sample separately;
2, the test sample is representative Parts, including, for example, elements such as doors, vents, support, and sealing shafts, and fine components containing the product, such as terminals, collector circles, etc., which should be maintained in the test process;
3, the test is the same as the original sample Small sample for design detail.