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From: firstname.lastname@example.org (Kooner)
Subject: Re: question on measuring temperarures at high voltages
Date: 23 Oct 2002 17:56:12 -0700
NNTP-Posting-Date: 24 Oct 2002 00:56:12 GMT
email@example.com (N. Thornton) wrote in message news:...
> "Ban" wrote in message news:...
> > "Kooner" schrieb im Newsbeitrag
> > news:firstname.lastname@example.org...
> > > I tried to measure the temperature of a LT1084 voltage regulator that
> > > is floating at 10kV. The 10kV is the output of a switching power
> > > supply. The regulator is in a TO-247 package. I placed a thermocouple
> > > on the body, which is supposed to be isolated from the leads and case
> > > (which are at high voltage). The thermocouple was plugged into a hand
> > > held temperature meter powered by a 9V battery.
> > I wouldn't hold that meter in the hand! consider that a 10kV potential can
> > bridge a substantial distance of air and zap...
> Exactly! Thats the first thing that crossed my cells! Good luck :)
> Regards, NT
Perhaps I used poor choice of words. When I said hand held meter, I
didn't mean I would actually hold the meter in my hand. My point was
the meter is powered by a battery and therefore not referenced to
earth ground as apposed to one of those data loggers that are plugged
into a 120VAC outlet. It seems to me that a data logger would present
a problem because it and the 10kV power supply are both referenced to
ground and this could damage the data logger couldn't it ?
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