Proper Grounding Techniques jim at g1jbg.co.uk Sat Mar 12
11:47:52 CST 2005 > Roger Merchberger wrote: > > Dontcha just
need to put a 1MegOhm resistor between the "Grounding > >
Station" (i.e. foil) and the earth ground connection? > Come to
think of it you do. How ever in my case the only time I'll be >
using a ground for static > electricity control is when I'll be
inserting the chips and that will be > with power off. Now
modern The idea of the 1M resistor (actually, there should be
two 1M resistors in series, in case one fails), is to protect
the engineer from shock IN BOTH DIRECTIONS, not only touching
live parts within the equipment, but also if you come between a
"floating" earth (Earth conductor in the UK can be several 10s
of volts - I've measured it as high as 80V above true earth) and
I can recomend the 3M products. These are a dissipative type
mat, which has a conductive layer between two insulating ones,
and discharges static by a capacitive method, the usual wrist
straps, and commoning blocks. T