Hey, I'm attempting to build one of these things and actually i'm just finishing,

My question is I see little reference to CalR, What is CalR?

Also does anyone have any tips before I connect a $170 sensor to it?


Thank You

CalR is a resistor located within the sensor connector. It is used to calibrate the circuit to each different sensor. Check the sensor connector and note two pins that do not have wires to them. Those two pins are CalR. No polarity, it is just a resistor.

Make sure you hook up the power correctly. A 3 to 5 amp fuse is also recommended. There is a check out procedure on www.diy-wb.org. Note that the last steps (34 - 42?) may not work. If not do not worry about it. These are the ones where the voltage slowly changes.

Have fun and good luck,

RBob.

wow thanks!!

I was going to snip the connect off the wire, I guess i'm going to need a harness now.

Thanks so much, the directions for this kit are very very unclear sometimes. It makes me think you almost have to be an electrical engineer to figure it out.

thanks again!

Um, I haven't seen it mentioned anywhere, but the sensor wire leads appear to be stainless steel. If you clip off the connector, you can't solder the leads to anything - they'll need to be crimped.

Also, IIRC the Cal resistor can be removed ftom the connector box without cutting off the other pins - just pry the box open.

Sorry to bring an old post back up..but did you get the WB O2 running rooster? And if so did you build this one?