In article ,
LaserMark wrote:
A little knowledge would be a dangerous thing if I ignored
perceived anomolies rather than find out what they are.
But it's basic electrical theory. If you use a very high input impedance
device you'll always get strange readings on an open circuit. Just
touching the leads will give some sort of reading. It is high impedance to
give an accurate reading under working conditions.
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*A closed mouth gathers no feet.
Dave Plowman
London SW
To e-mail, change noise into sound.