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Newshound

wrote in message ...
On 9 Apr,
wrote:

Of course, that completely ignores the false negative potential for
them, and that is the real problem with them.

you should always test the tester before /and/ after use, which will
minimise
false negatives. If you understand how they work, /and/ their limitations
you
can't go far wrong. This applies to all test proceedures.

--
B Thumbs
Change lycos to yahoo to reply

Well said. Did anyone actually answer the original question? The neon tube
is in series with a big resistor, about 1 Megohm if I recall correctly, so
that only a fraction of a milliamp goes through you; this does you no harm
but is quite enough to light up the neon.