uses a certified reference device with a predefined, known leak rate to verify the measurement accuracy of a helium leak detector. This vital process ensures that the detector consistently provides reliable and precise quantitative measurements during production-line testing. Regular calibration safeguards manufacturing quality by eliminating sensor drift and maintaining alignment with strict industrial testing standards.
- Calibrated Leaks: These specialized reference devices release a precise, known volume of helium gas at a constant rate. Typically categorized by their specific leak rates (ranging from 10^-6 to 10^-8 atm-cc/sec, they are generally available as either reservoir-type or permeation-type configurations.
- The Calibration Process: During a routine check, the leak detector is connected directly to the calibrated leak standard. The system’s measured output is then compared against the certified leak rate of the reference standard to adjust sensor sensitivity.
- Traceability: High-quality calibrated leaks are traceable to national standards, such as the National Physical Laboratory (NPL), guaranteeing absolute measurement accuracy and regulatory compliance.
Applications: These standards are indispensable for the precise calibration of both high-sensitivity vacuum chamber systems and manual sniffer-type helium leak detectors.