Nitrogen Pressure Test (Temperature-Corrected)
Separates a real leak from the thermal swing in a standing nitrogen pressure test using Gay-Lussac's law (P/T constant at fixed volume, absolute units): the temperature-corrected expected gauge pressure, the pressure lost below it to a leak, and a holds / leak verdict against an editable tolerance.
Formula and source
Gay-Lussac at constant volume: expected_psig = (start_psig + atm) x (T2_R / T1_R) - atm, with T_R = T_F + 459.67. leak_drop_psi = expected_psig - end_psig (positive = lost below the temperature-corrected value = leak); within +/- tolerance is a thermal-only hold.
First-principles Gay-Lussac's law (ideal gas at constant volume, public physics); the standing nitrogen pressure test with temperature correction is standard refrigeration leak-check practice (by name).
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