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| Originally Posted by Andy_Corkill Still playing with my homebrew electroinics facing the question 'How to calibrate my O2 sensors ?' I'm currently using individual pot's on my Op amp to calibrate my sensors, which has it's advantages & disadvantages. |
The real problem is that as they age they drift so you will be forever going in with the screwdriver.
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I realise there must be a different approach I can take because you don't calibrate using pots on the Inspiration. If I was to take this approach do I have to calibrate using the software only (using an error factor perhaps ?)
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The YBOD just reads the raw voltages and during its set up phase blows pure oxygen in and when the cells stabalise says 'so that is what 100% looks like today' and generates a factor to multiply volts by to get bar. It also asks for the current air pressure as that will show in the second decimal place but few of us bother with that as I doubt my body is calibrated to be within a few percent of tables standard. Calibrating on 100% is much better as any errors at 21% are multiplied by 5 at one bar ppO2.