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In this case the part is pressurized (sometime this test is combined with a burst test, i.e. at 40 bar) with helium while sitting in a vacuum chamber. The vacuum chamber is connected to a vacuum pumping system and a leak detector. Once the vacuum has reached the mass spectrometer operating pressure, any helium leakage will be measured.
DO-160, Environmental Conditions and Test Procedures for Airborne Equipment is a standard for the environmental testing of avionics hardware. It is published by the Radio Technical Commission for Aeronautics (RTCA) and supersedes DO-138.
A hydrostatic test involves pressurising the cylinder to its test pressure (usually 5/3 or 3/2 of the working pressure) and measuring its volume before and after the test. A permanent increase in volume above the tolerated level means the cylinder fails the test and must be permanently removed from service. [3]: sect. 5.7.3
Instrument mechanics in engineering are tradesmen who specialize in installing, troubleshooting, and repairing instrumentation, automation and control systems.The term "Instrument Mechanic" came about because it was a combination of light mechanical and specialised instrumentation skills.
The International Follow-On Structural Fatigue Test Program (IFOSTP) was a joint venture between Australia, Canada and the U.S. to fatigue test the F/A-18 Hornet. The Australian test involved the use of electrodynamic shakers and pneumatic airbags to simulate high angle of attack buffet loads over the empennage. [13] [14]
Environmental testing is the measurement of the performance of equipment under specified environmental conditions. [1] This can include the following: [2] [3] High and low extreme temperatures
The probe of the pressuremeter is inserted into the borehole and is supported at test depth. [1] The probe is an inflatable flexible membrane which applies even pressure to the walls of the borehole as it expands. As the pressure increases and the membrane expands, the walls of the borehole begin to deform.
IEEE 829 – Test Procedure Specification The Test Procedures are developed from both the Test Design and the Test Case Specification . The document describes how the tester will physically run the test, the physical set-up required, and the procedure steps that need to be followed.