... monitoring system, a data acquisition and processing device. It is used for continuous monitoring of smoke, SO2, NOx and ... 4. Particulate Monitor 5. Purge Device 6. Data Acquisition and Processing Device 7. Calibrator 8. Measuring Device for Temperature, Humidity, Flow, Oxygen ... calibration zero and calibration of SO2, NOx, O2 measuring device.4.3 Timing automatic calibration4.4 Function of calibration ...