SLAA976 October 2020 MSP430FR5041 , MSP430FR5043 , MSP430FR6005 , MSP430FR6007 , MSP430FR6041 , MSP430FR6043 , MSP430FR6045 , MSP430FR6047
3 Test Results
The test results in Figure 3-1 show the captured ADC waveform and Figure 3-2 shows the sensor readings as the device starts operation from an initial off state. The circled section shows the absolute TOF values when the machine is off. At this point, the gas inside the pipe is simply air. Since air is approximately 21% oxygen, you can use this as a calibration point for the system.
Figure 3-1 ADC Capture and Experimental
Results
Figure 3-2 Waveform ResultsThe pulses from the pulsed oxygen concentrator can be seen in the Waveforms Window. In order to extract the oxygen concentration, save the data as a .cvs file and do the conversion in a spreadsheet.