Cryorefrigerator Pump Leak Hunting & Fault Diagnostics Protocol
Diagnostic decision trees for isolating cold head displacer leaks, Aeroquip poppet failures, and thermal transient anomalies on high-vacuum closed-loop cryopumps.
Key Protocol Directives:
- ⚡ Differentiate between internal thermal load overload and vacuum boundary leakage using second-stage cool-down transient slope analysis.
- ⚡ If static helium pressure increase on compressor increases mass-4 background directly, internal displacer seal failure is confirmed.
Updated: Mar 22, 2022 Open Field Guide →
Helium Mass Spectrometry Leak Testing & High-Vacuum Integrity SOP
Quantitative leak detection protocols using systematic local spraying, hood enclosures, and sniffer probe methodologies per DIN EN 1779 and ISO 20485.
Key Protocol Directives:
- ⚡ Calibrate against NIST-traceable calibrated helium leak reference before and after every testing sequence.
- ⚡ Enforce bottom-to-top spraying sequence to prevent buoyant helium drift from causing false positive leak indications.
Updated: Dec 28, 2021 Open Field Guide →