Troubleshooting & Procedures
Practical field reference: overview, calibration, maintenance, and shared AZ alarms.
Overview
The ABB AZ20 is suitable for industrial combustion processes with mid-level accuracy and extended diagnostics for stable O₂ measurement.
Calibration
Perform zero, span, and reference gas calibration as per the manual. Use diagnostics tools to confirm sensor stability and response.
Field tip: If calibration shifts often, check sample leaks, moisture/condensation,
and reference path restrictions before blaming the sensor.
Maintenance
Inspect sensors, heaters, and reference gas/air path periodically. Replace components as recommended by the manufacturer.
- Check filter condition and sample flow stability
- Confirm heater temperature stability (no hunting)
- Verify reference/air path is clean and dry
- Check wiring/earth for noise issues