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7 Calibration with “Pyro Oxygen Logger”This chapter describes the possible calibration modes for oxygensensors using the logger software “Pyro Oxygen Logger”. Pleasenote that the possible calibration modes differ depending on theconnected FireStingO2 device:If your device has integrated humidity and pressure sensors (e.g.FireStingO2 devices with micro-USB connector, firmware >3.0)proceed with chapter 7.1.If your device does not possess integrated humidity and pressuresensors (e.g. FireStingO2 devices with classical full-size USBconnector, firmware 2.30), then proceed with chapter 7.2.For many calibration modes, the atmospheric pressure and therelative humidity of the ambient air are important parametersensuring a high precision of the calibration. Formerly it was on theuser´s authority to measure and adjust manually these parameters.But the FireStingO2 devices come with integrated pressure andhumidity sensors, which measure these parameters nowautomatically, ensuring a straightforward calibration procedureand eliminating many possible error sources.This chapter covers only the necessary steps during the calibrationprocedure. For details regarding the preparation of the calibrationstandards refer to chapter 8.48