how do you calibrate electronic compass

 

Don't buy one, they are a piece of crap and don't work!

 

Every one I've seen is calibrated by going slowly in a large circle (or around the block). The instructions usually say they will also calibrate during normal driving (just takes a little longer.
Yours may be different, but I've had several vehicles that came with them and the instructions all said to do the 360 degree circle.

 

If it is a Harley Compass ditto above re not buying one