Getting your local earth field value

[Willy Bayot]

The following document found at the link:

http://perso.infonie.be/j.g.delannoy/BAT/IntroductiontoMagnetometerTechnology.pdf

described this procedure but the links it gave are no longer active.
I have re-written a new procedure and this is the attached document.
I'll integrate later this description and a few other updates into the set of documents found at that link:

http://perso.infonie.be/j.g.delannoy/BAT/PPMGuidelines.htm

Willy