Oxygen Analyzer Troubleshooting Check
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2 If the oxygen content is too high, and if the measurement results are not improved by repeatedly purging the sampling probe and filter by repeated calibration of the oxygen span, you should suspect that the thermomagnetic oxygen analyzer samples all air. Example analysis: The central control shows the analyzer 02 high report, on-site inspection of the sample gas flow is normal, after the repeated calibration of the 02 span is still reported high, carefully inspect the sample gas circuit, found that the trachea into the thermal magnetic oxygen analysis was flushed, recovery after treatment Normal, O2 content is about 8.6%. 3 The gas analyzer heat exchanger cannot start normally. Mostly, the temperature controller contact fails. As a result, the PLC monitoring unit has no input/output. After processing the contacts, it can return to normal.
4 If the control head is frequently jammed or stuck, the automatic probe purge time and automatic probe movement time in the program must be changed in time according to the change of working conditions in the kiln.
5 After the programmable controller program is lost, copy and restore can be performed according to the following steps: first turn off the power of the PLC, remove the lithium battery, take out the electrically washable memory unit “EPROMâ€, and then put it back. To restore the power to the PLC, turn the switch on the programmable controller to the "STOP" position for at least 5 seconds and then to the "Copy" position until the red light stops flashing. Then turn the switch to the “Run†position and replace the lithium battery. The green light should be illuminated at this time, and the PLC's input signal light should also display the normal state. In the worst case, the PLC central processing unit needs to be replaced.