AMETEK 933 — Alarm Codes (Quick Actions)
Common AMETEK 933 alarm conditions with recommended first checks. Use decision trees for step-by-step isolation.
Field tip: For oxygen analyzers, solve flow/leaks/moisture before touching calibration or sensor replacement.
Flow / Sample System
- Low / No Flow — confirm sample supply, filter blockage, regulator setpoint, pump operation
- Flow unstable — regulator hunting, leaks, pump weak, condensation
- High DP / Filter blocked — replace/clean filter, check sample particulate
Reading Quality
- Unstable reading — moisture, leaks, unstable flow, loose wiring, grounding
- Slow response — long lines, restrictions, weak pump, moisture separation issue
High O₂ Bias
- O₂ reading too high — air ingress/leaks, cracked tubing, loose fittings, sample dilution
- Span seems high but process stable — verify calibration gas and sample integrity
Calibration / Sensor Health
- Calibration failure — wrong gas, leaking cal manifold, insufficient warm-up, sensor aging
- Zero/Span won’t stabilize — flow/leaks/moisture first, then sensor
⚠️ Reference only. Always follow site safety rules and manufacturer documentation.