ENGINEERING TOOLS
Twelve practical calculations for leak testing and vacuum systems. Each tool states its units, assumptions and a worked example. Use the model that matches the test conditions.
01 / CALCULATOR
A steady-state gas balance relates chamber pressure to the total gas load. Allocate only the selected fraction to real leaks; the rest must cover outgassing, permeation and process gas.
Open calculator →02 / CALCULATOR
An isolated rigid chamber gives an average total gas influx from its pressure increase: Q = V Δp/Δt.
Open calculator →03 / CALCULATOR
Estimate additional gas load from the pressure increase above a measured baseline at the same effective pumping speed.
Open calculator →04 / CALCULATOR
Compare four detector connections, the time to reach 95% of a step signal and the fraction of helium reaching the detector.
Open calculator →05 / CALCULATOR
Compare viscous and molecular estimates for an idealised capillary, together with the Knudsen numbers at each end.
Open calculator →06 / CALCULATOR
Convert background-corrected detector signals to helium throughput using a reference leak measured through the working test system.
Open calculator →07 / CALCULATOR
Apply the reference-leak model supplied on the source site: annual exponential reduction and a multiplicative temperature correction.
Open calculator →08 / CALCULATOR
Calculate long-tube molecular-flow conductance, effective pumping speed, response and decay after a finite helium application.
Open calculator →09 / CALCULATOR
Fit a straight line to 3–100 pressure measurements, calculate Q = Vb and subtract an independently measured background load.
Open calculator →10 / CALCULATOR
Estimate helium throughput from concentration increase in the free volume of an outer collection enclosure.
Open calculator →11 / CALCULATOR
Estimate a single leak position from helium throughput division between the two ends of a uniform vacuum line.
Open calculator →12 / CALCULATOR
Distribute a system leakage budget equally over components with a selected margin factor, then estimate the sequential batch duration.
Open calculator →Use this technical information to define your project scope, then contact LeakLab for method selection, engineering review and implementation support in your destination country.