Summary of Test Method
There are two versions of the test method. Test method A applies standard temperatures of a sample and three QCMs. Test method B allows the use of spacecraft-system-specific temperatures and configurations.
Test method A can be selected when the sample heating temperature and QCM temperatures are stipulated according to the purpose of the test; test method B can be selected when these parameters can be set arbitrarily.
(1) Method A
- Sample to be tested at three temperatures.
1st test: 125°C
2nd test: 75°C
3rd test: 50°C unless the deposited mass on QCM1 in the second test is 5% or less of that in the first test, in which case the temperature is 100°C.
- Three QCMs are used to measure Molecular deposition of outgas.
[Cooling Temperatures of the QCMs]
QCM 1 ≤ -183°C
QCM 2 -113°C
QCM 3 25°C
- Heating time is 120 hours.
(2) Method B
- Sample temperature is set arbitrarily between 50°C and 125°C.
- There are three or four QCMs.
[Cooling Temperatures of the QCMs]
QCM 1 ≤ -183 °C
QCMs 2 to 4 arbitrary temperature
- Heating time is 120 hours.