Updated example code.

Support forum for the Lambda Shield designed to connect Bosch LSU 4.9 wideband oxygen sensors to Arduino projects.
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Christian_Bylund
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Joined: 07 Mar 2015 18:09

Updated example code.

Postby Christian_Bylund » 25 Oct 2018 23:47

The calculations used in the example code should only be considered when operating at lambda levels near λ 1. Using this approximation outside the intended area of operation will result in a proportional error. The following table shows the accuracy between λ 0.750 and λ 10.119.



The calculation should be used for educational purposes and the accuracy is adequate when operating near λ 1. When measuring at much leaner or richer gases an improved method of converting the CJ125 output voltage is needed. A lookup table have been implemented to the example code to correct this error.
Best Regards,
Christian Bylund
Bylund Automotive AB