LEAK TESTING · ENGINEERING CALCULATOR
Apply the reference-leak model supplied on the source site: annual exponential reduction and a multiplicative temperature correction.
All calculators · Equipment catalogue · Warehouse stock
Model
Calculate
Assumptions and use
Use only coefficients and a validity range established for the specific reference leak. A generic temperature coefficient must not be transferred between permeation leaks and capillary leaks. This estimate does not extend calibration validity or replace uncertainty and certificate requirements.
Worked example
The default example combines 2 years of 2% annual reduction with a rise from 20 to 25 °C and a 3%/°C coefficient.
Record the units, gas, temperature, background and instrument settings with every result. Confirm the model assumptions before applying a calculated limit to a real test.
Related calculations
- Allowable leakage from pressure and pumping speed
- Gas influx from chamber pressure rise
- Gas load from steady pressure pS
- Leak detector response time and helium flow splitting
- Capillary leakage: flow regime and throughput
- Reference-leak calibration and detection threshold
- Reference-leak temperature and ageing correction
- Vacuum-line conductance, response and helium recovery
- Gas influx from a pressure measurement series
- Helium leakage from accumulation in an enclosure
- Leak location using two pumping stations
- Leakage allocation and sequential test-cycle time