A properly adjusted burner requires a reliable analyzer. If the instrument provides incorrect measurements, it can lead to improper adjustment.
Sensors
O₂ and CO sensors have a specific service life and must be checked according to the manufacturer's schedule.
Filters
Dirty filters or water traps can restrict sample flow and affect readings.
Sampling probe
Check for leaks, cracks, condensate, and proper connection.
Zero and calibration
The instrument must be zeroed and calibrated according to the manufacturer's instructions and application requirements.

