Yokogawa – Alarm Decision Trees
Step-by-step alarm troubleshooting flows written for analyzer technicians. Follow in sequence — fix sampling & utilities before electronics.
Golden rule: If readings are unstable, drifting, or wrong —
check sample condition, pressure/flow, purge/reference air before calibration or parts replacement.
Select Analyzer
ZR22G – Zirconia O₂ Analyzer
Heater issues, drift, calibration failures, no response.
OX400 – In-situ O₂ Analyzer
Unstable reading, probe fouling, calibration & communication issues.
GC8000 – Process Gas Chromatograph
Carrier pressure, oven readiness, valve switching, detector faults.