Validation Utility
Cynic Sterilization Kineticist.
This calculator is now grounded in two layers only: pressure-derived chamber temperature and an optional observed core-lag model. The previous profile-based lag heuristic is removed from the math because it was not defensible enough to present as a cycle-time estimate.
Longmont Reference
4,984 ft
Site operating elevation used across the protocol docs.
Nominal Chamber
15 PSI
At this elevation the chamber plateaus near 118.3 C.
Release Threshold
F0 ≥ 120
Used here as the default target for planning comparisons.
Inputs
Planning Model
Applied Temperature
118.3
Capped below pressure-derived plateau.
Steady-State Hold
229
Minutes if the core were already at chamber temperature.
Lag-Adjusted Hold
229
Chamber minutes to hit target under the optional core warm-up model.
Lethality Rate
0.525
Relative to 121.1 C using z = 10 C.
Model Report
Cycle Planning Output
Target
F0 120
Pressure + Elevation
12.24 PSI atmospheric + 15.0 PSI gauge = 27.24 PSI absolute.
Pressure-derived chamber temp 118.3 C
Steady-State Basis
At 118.3 C, the chamber accumulates lethality at 0.525 x the 121.1 C reference rate.
229 min
Observed Lag Model
No observed lag entered. Lag-adjusted hold currently matches the steady-state estimate.
229 min
Safety Cap Status
The pressure-derived plateau exceeds your cap, so the calculation is performed at 118.3 C instead.
Max uncapped gauge at this elevation: 15.0 PSI
Core Response Snapshot
Starting Core Temp
20.0 C
Core Temp At Lag Window
118.3 C
F0 Accrued During Lag Window
0.0
Core Temp When Target Is Reached
118.3 C
Interpretation
- Chamber pressure and altitude physics are deterministic here; the uncertainty lives in how quickly the core approaches plateau.
- If you do not have measured lag, treat the steady-state hold as a comparison baseline, not a release-ready cycle.
- If you do have probe data, use the lag-adjusted result as a better planning estimate, then validate against logged thermocouple evidence.
Decision Boundary
This utility is for planning, comparison, and audit literacy. It does not authorize product release, replace measured batch evidence, or override QA disposition tied to actual logged thermal data.