Cyclic pressure testing has a data-integrity problem most people don't think about: if the test chamber itself develops a fault mid-run, you don't get an error, you get quietly corrupted results that don't show up until someone notices the numbers don't make sense.
Neometrix's PLC Controlled Autoclave Pressure Tester is built around that constraint. The core vessel is a 13-liter SS304 chamber, structurally rated to 200 bar against ASME Section VIII Division 1, ISO 11120, and PD5500, but operated only up to 150 bar in practice -- a deliberate margin so the chamber is never the weak point. It batch-tests up to 12 units at once, arranged on a perforated tray, with ISOPAR M/L as the working fluid and a double-fill cycle specifically to de-aerate the system before pressurization.
Before touching the real units under test, the system runs a stepwise self-test pass on the chamber itself, checking for gasket leaks, micro-fractures, and clamp misalignment. Six interlocks have to clear before any pressurization happens at all: lid clamp, fluid level, air supply, filter status, valve configuration, temperature.
The actual test parameters -- ramp time (5-15 min), hold duration (1 sec to 24 hours), cycle count (0 to 9+) -- get set once as a recipe on the HMI and reused across batches, with pressure and temperature sampled at 10 Hz and exported to CSV. That data density matters for aerospace, defense, and nuclear instrumentation work, where a fatigue failure at cycle 8,743 is the actual finding, not noise to average out.
Full writeup: https://neometrixgroup.com/products/PLC-controlled-autoclave-pressure-tester
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