carbon dioxide sensor mg811

[chal]

i recently purchased a carbon dioxide sensor ,MG811 but then i donot know how to test it.may you please help me on how best i can test the sensor without damaging it.i need to kno how to identify pins A and B. its not really clear in the data sheet

thank you in advance

[Acetronics]

Hi, Chal

Datasheets are provided to show people how devices run and are to be used ...

so, It's YOURS to read them as a first step ...

now ...

http://www.picbasic.co.uk/forum/showthread.php?t=8709

should show you how those littles things are to be wired.

Alain

[chal]

i have followed the link you provided, http://www.picbasic.co.uk/forum/showthread.php?t=8709 and now i do not understand how the H pins are connected, are we supposed to shot them and then connect them to 6V??
thank you in advance

[supra]

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Mg811.jpg (91.1 KiB) Viewed 3007 times

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[chal]

i have connected the sensor as per the picture above.i left the sensor to stabilize for about 10minutes and then checked the output voltage it was 56mV and then blew into the sensor.the output voltage dropped to about 47mV which is something i expected. i blew two more times and the output voltage stared increasing until it got to 2V.what could be the problem the circuit connections seem to be ok