Calibration

Support forum for the Lambda Shield designed to connect Bosch LSU 4.9 wideband oxygen sensors to Arduino projects.
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Fgodinho
Posts: 3
Joined: 23 Oct 2019 15:50

Calibration

Post by Fgodinho » 28 Oct 2019 01:59

Is it possible to do some probe calibration by Shield? Is there any procedure?

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Christian_Bylund
Posts: 58
Joined: 07 Mar 2015 18:09

Re: Calibration

Post by Christian_Bylund » 28 Oct 2019 18:31

Fgodinho wrote:
28 Oct 2019 01:59
Is it possible to do some probe calibration by Shield? Is there any procedure?
The 2 types of calibration that I know of is the following:

1. Propane gas calibration (Not very safe):
https://performancetrends.com/PDFs/A-F%20Checker.pdf

2. Free air calibration (Very safe):
https://www.aga.se/sv/images/Synthetic%20Air_en_se.1.0_tcm586-443665.pdf

Free air calibration can also be done in "free air" without any gas, just take in consideration that humidity, temperature, pressure affects the reading. But this is usually sufficient. The Lambda Shield for Arduino is typically showing between 20-21% in free air with a healthy sensor.

For high precision instrumentation, you would ideally need a calibration gas close to the measured gas but then we are far from the capabilities of the Lambda Shield.

Thank you.
Best Regards,
Christian Bylund
Bylund Automotive AB

billlask
Posts: 1
Joined: 20 Nov 2019 13:26

Re: Calibration

Post by billlask » 24 Nov 2019 00:18

Hello
Have we found a way to calibrate the data?

Thank you

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Christian_Bylund
Posts: 58
Joined: 07 Mar 2015 18:09

Re: Calibration

Post by Christian_Bylund » 24 Nov 2019 14:46

billlask wrote:
24 Nov 2019 00:18
Have we found a way to calibrate the data?
Hello.

Yes, the most common solution is to calibrate or rather verify the data in open air.

Here is a video we have made on how to get the most accuracy out of your Arduino and Lambda Shield.

https://www.youtube.com/watch?v=YBFQFQDi_Lo

Thank you.
Best Regards,
Christian Bylund
Bylund Automotive AB

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