Siemens MAXUM II — Alarm Decision Trees
Start with utilities and stability before touching calibration factors.
Rule: If retention times are shifting, do not re-identify peaks yet.
Fix carrier flow/pressure and oven temperature stability first.
Baseline Noise / Drift
Noise, unstable baseline, drifting signal, poor integration.
Retention Time Shift
Peak timing shifts vs reference; peak ID becomes wrong.
Poor Repeatability
Repeat injections vary; unstable composition results.
FID Flameout (if FID installed)
FID flame not stable or ignition fails.