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Old 07-19-2003, 09:16 PM   #17
Jon [in CT]
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Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
Vehicle:
02 WRX Sedan
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Quote:
Originally posted by Austin
The wideband unit itself gives a 1.8-2.8volt rich to lean signal, which is extremely accurate compared to the digital readout on the meter. You use an inverter/amp card (basically just a voltage divider) to change the signal to a 0-1volt lean to rich. I've tried several different inverter amp cards from Lambdaboy, with several different styles of power supply, and several different calibration curves... none come close.
I wonder whether your "accuracy" problem might be due to "offset voltages." The main OZ DIY guy mentions it here:
http://autos.groups.yahoo.com/group/...b/message/3770
And if you don't feel like signing up to read that, go to the bottom of this page:
http://techedge.com.au/vehicle/wbo2/wblambda.htm
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