MIL-STD 883 Cámaras climáticas de pruebas de ciclos de temperatura
14 mayo 2024
The temperature cycle procedure specified in MIL-STD-883 Method 1010 typically involves exposing a part or assembly to a range of temperatures from low to high and back again, generating low/medium frequency mechanical stress for a specified period of time. This test is designed to assess the reliability and durability of a part or assembly and identify any potential problems that may arise as a result of exposure to temperature changes.
Place the sample in a location in the climate chambers so that the flow of air around and around the sample is not obstructed, and when special installation is required, it is indicated, and then place the sample under the specified conditions for a specified number of consecutive cycles, which are performed for at least 10 cycles using test condition C in the table below.
A cycle consists of steps 1 and 2 or applicable test conditions and must be completed without interruption. The completion of the total number of cycles specified for the test may be interrupted by the loading or unloading of the equipment batch or due to power or equipment failure. However, if the number of interruptions for any reason exceeds 10% of the total number of cycles, the test must be restarted.
For optimal temperature cycle testing, the total transfer time from hot to cold or from cold to hot must not exceed one minute, and the load can be transferred when the worst case load temperature is within the limits specified in the table below. However, the residence time must not be less than 10 minutes, and the load must reach the specified temperature within 15 minutes (16 minutes for a single chamber).
How should the material be analyzed after the temperature cycle certification test?
After completing the last cycle, perform an external visual inspection of the mark at no magnification or no more than 3x magnification, and a visual inspection of the housing, leads, or seals at 10x to 20X magnification. However, when the method is used 100%, the inspection magnification is at a minimum of 1.5x, and this inspection and any other measurements or inspections are performed after the last cycle, or after a group, sequence, or subgroup of tests.
Any evidence of defective or damaged housing leads or seals, illegal marking, inspection, or any measurement failure at a specified end point is considered a failure. Damage to the mark caused by operation during testing or fixing should not be grounds for rejecting the equipment.
Failure of one or more specified end-point measurements or inspections after acceptance of the test constitutes a failure. Evidence of defective or damaged housing, leads or seals or illegible markings will be considered a failure. However, damage to the mark caused by fixing or handling during testing is not a cause of rejection of the equipment.
As a leading manufacturer of Climate Chambers in China, JOEO's experts are able to provide thermal cycle certification for commercial, military, automotive and aerospace, electronic products. Our temperature test equipment is complete, including temperature test chamber, ESS test chamber, thermal shock test chamber, altitude test chamber, salt spray test chamber, etc., can perform the best compliance test for your products.
Equipos de prueba
The temperature and humidity test chamber used should be able to provide and control the specified temperature of the working area when the chamber load is maximum load, the heat capacity and air circulation must make the working area and load meet the specified conditions and time, during the test, the worst case load temperature should be continuously monitored by an indicator or recorder, and the direct heat conduction of the sample should be minimized.
MIL-STD 883 Programa de prueba de ciclos de temperatura
In a thermal cycling laboratory, the climate chambers used must be able to provide and control the specified temperature of the work area at the time of loading the maximum load, the heat capacity and air circulation must enable the work area and the load to meet the specified conditions and times, the worst-case load temperature should be continuously monitored by an indicator or recorder during the test, and the direct heat transfer to the sample should be minimized.Place the sample in a location in the climate chambers so that the flow of air around and around the sample is not obstructed, and when special installation is required, it is indicated, and then place the sample under the specified conditions for a specified number of consecutive cycles, which are performed for at least 10 cycles using test condition C in the table below.
A cycle consists of steps 1 and 2 or applicable test conditions and must be completed without interruption. The completion of the total number of cycles specified for the test may be interrupted by the loading or unloading of the equipment batch or due to power or equipment failure. However, if the number of interruptions for any reason exceeds 10% of the total number of cycles, the test must be restarted.
For optimal temperature cycle testing, the total transfer time from hot to cold or from cold to hot must not exceed one minute, and the load can be transferred when the worst case load temperature is within the limits specified in the table below. However, the residence time must not be less than 10 minutes, and the load must reach the specified temperature within 15 minutes (16 minutes for a single chamber).
How should the material be analyzed after the temperature cycle certification test?
After completing the last cycle, perform an external visual inspection of the mark at no magnification or no more than 3x magnification, and a visual inspection of the housing, leads, or seals at 10x to 20X magnification. However, when the method is used 100%, the inspection magnification is at a minimum of 1.5x, and this inspection and any other measurements or inspections are performed after the last cycle, or after a group, sequence, or subgroup of tests.
Any evidence of defective or damaged housing leads or seals, illegal marking, inspection, or any measurement failure at a specified end point is considered a failure. Damage to the mark caused by operation during testing or fixing should not be grounds for rejecting the equipment.
Failure of one or more specified end-point measurements or inspections after acceptance of the test constitutes a failure. Evidence of defective or damaged housing, leads or seals or illegible markings will be considered a failure. However, damage to the mark caused by fixing or handling during testing is not a cause of rejection of the equipment.
As a leading manufacturer of Climate Chambers in China, JOEO's experts are able to provide thermal cycle certification for commercial, military, automotive and aerospace, electronic products. Our temperature test equipment is complete, including temperature test chamber, ESS test chamber, thermal shock test chamber, altitude test chamber, salt spray test chamber, etc., can perform the best compliance test for your products.
