To ensure the oxygen probe is functioning properly, please follow the detailed steps below. Firstly, if you are not certain that the oxygen probe is the cause of the atmosphere control failure, do not attempt to remove the probe from the furnace. All subsequent operations should be based on the probe being installed or located inside the furnace, operating at normal working temperature, and under a reducing atmosphere.

1. Has the probe's display value been corrected using a dew point meter (or thin-film carbon determination) method? If so, the issue is not with the oxygen probe. If repeated testing still yields incorrect results (error greater than 15%), the following troubleshooting steps should be taken. 2. Check and confirm that the thermocouple's compensation wire and the oxygen probe's signal wire connections are clean and secure, and that they are correctly connected to the corresponding terminals of the instrument. 3. Is the control instrument's (instrument for oxygen probe signal input) coefficient set correctly? This coefficient has many aliases: process coefficient, probe coefficient, coefficient, loop coefficient, calibration coefficient, etc. Adjusting this coefficient can reduce or eliminate the deviation between the displayed value and the actual process data acting on the workpiece.