SMART TUNER SMT6 - CALIBRATION OFAIRFLOW & TEMPERATURE SENSORS
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Perfect Power Application Notes. |
Application Note : AN 3.3 |
Introduction
The principles in this application note hold true in both the SMT and PRS range of products. The PRS and SMT units are all about sensor readings, if you have the correct signal it does not matter where it comes from, the unit will read it. We can claim that these units are compatible with such a wide range of sensors for two reasons :
- Most sensors have an analog range between 0-5V, with exception of the frequency-based signals
- In both units we can calibrate the software to read a portion of the 0-5V range, it makes better sense to adjust the sensor range to read between 2-3V if the sensor being used only moves between 2-3V.
It is the ability to calibrate the curves that gives it flexibility but we have found that it is also a bit difficult to understand, hence this application note.
Diagrams
The following diagrams show the installation of Perfect Power temperature and airflow sensors, diagrams for other types of sensors can be found in the PRS development manual.
Software Calibration
Conclusion
Windows software should be coming out with a graphical method of calibration that will be a lot easier to use, but because of the dos recognition in Windows the above methods will work in Windows software as well.