GJB150.12A-2009 Environmental testing method for military equipment laboratory Part 12: The sand dust test explains a series of operational procedures for military equipment in the sand dust test, as follows:
First, test preparation
Before the start of the test, determine the test procedure, the technical status of the test piece, the number of cycles, the duration, the parameter values ​​of the storage and work, etc. according to the relevant documents:
a. Determine the required test procedure based on the technical documentation.
b. Determine the specific test variables to be used based on the technical documentation.
c. Run the sand test chamber without the test piece to confirm that it is working properly:
1. Calibrate the sand distribution system with the sand concentration specified in the technical documentation;
2. Adjust the position of the air supply system or the test piece to obtain the wind speed specified by the test piece;
3. For the dust reduction test, the dust was injected every 1 hour for 1 minute, and then the dust was dropped for 59 minutes to check the dust falling rate during the 2 hour period.
WARNING: A relatively dry test environment with flowing air, organic dust, and grit may cause an increase in the static energy of the test piece, which may affect the operation of the test piece. If organic dust is used, be careful when contacting the test piece during or after the sand test. During the test of the test piece, there may be an abnormality due to the electrostatic discharge.
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