Troubleshooting & Procedures
Practical field reference: overview, calibration, maintenance, and shared AZ alarms.
Overview
The Endura AZ20 system uses a zirconia combustion oxygen probe with a transmitter. Select the probe, transmitter and accessories against the documented process limits; no relative accuracy ranking is established here.
Calibration
Follow the transmitter calibration instructions for the installed test-gas arrangement. The probe reference-air supply and test-gas connections serve separate functions; “reference gas calibration” is not an additional generic calibration step.
Maintenance
Inspect sensors, heaters, and reference gas/air path periodically. Replace components as recommended by the manufacturer.
- Inspect the fitted probe protection and gas connections according to the probe manual
- Confirm heater temperature stability (no hunting)
- Verify reference/air path is clean and dry
- Check wiring/earth for noise issues
Common Alarms
The linked archive is labelled AZ10. Verify AZ20 applicability against its own transmitter diagnostics.
Technical references
Updated against manufacturer documentation. Match the document to the installed model and options.
- ABB: Endura AZ20 Oxygen monitor — Combustion oxygen probe — IM/AZ20P-EN, Rev G; introduction, pneumatic connections and maintenance.
- ABB: Endura AZ20 Oxygen monitor — Transmitter — IM/AZ20E-EN, Rev B; calibration and diagnostics.