Re: Arc and heat.

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 

The meter should have that in the instructions.  On some you actually enter
the emissivity as a parameter.

Emissivity is a function of the material and the finish.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, March 14, 2004 5:08 PM
Subject: RE: Arc and heat.


 > Original poster: "Luke" <Bluu-at-cox-dot-net>
 >
 > Thanx for the thoughts.
 > Would the emissivity of the copper be something located on a chart from
 > the manufacturer of the thermometer?  Or is there an emissivity property
 > to materials like specific heat etc?  and once I have the emissivity
 > number how to I apply it to the reading to obtain an accurate temp?
 >
 >
 >
 > Luke Galyan
 > Bluu-at-cox-dot-net
 > http://members.cox-dot-net/bluu
 >
 > -----Original Message-----
 > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 > Sent: Sunday, March 14, 2004 8:41 AM
 > To: tesla-at-pupman-dot-com
 > Subject: Re: Arc and heat.
 >
 > Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
 >
 >   > Any way I started playing with it with no water in it.  I let it run
 > for
 >   > about 2 minutes and found the copper pipe to be much hotter than the
 >   > loop.  I figured this was due to the loop having more thermal mass.
 > So I
 >   > turned it on and played with the spark for about 20 minutes.  Then I
 > found
 >   > the loop side had heated up but still not nearly as much as the
 > copper
 >   > pipe.  Got an infrared thermometer on order so it's the touch it and
 > see
 > if
 >   > it leaves a mark method for now. J
 >
 > Get one of those inexpensive "instant read" meat thermometers at the
 > supermarket.  Turn it on, touch the probe to the surface, and you get
 > the
 > temperature in a matter of seconds.
 >
 > or, if you want to measure temp while it's running, get a regular
 > mechanical
 > meat or barbecue thermometer (with the dial) and figure out how to
 > attach
 > it.  In both cases, the "sensitive tip" is what you need to attach (high
 > temp epoxy? A small hole that you press fit into?)
 >
 > BTW, those IR thermometers assume a particular emissivity of the thing
 > they're looking at so make sure you look it up for your copper and apply
 > the
 > right cal factor.
 >
 >   >
 >
 >