Jed, if I find the time tomorrow during work, I do the test myself.
This is better. I fear your test will not be correct.
I will use a resistor in an aluminium housing as a heat source and two
thermoelements and two instruments.
One thermocouple will be in close metallic contact to the resistor and
the other will be isolated by a piece of duct tape.
I will provide a macrophotography. I will also provide an overall
photography that shows both thermometers and the measuring instrument in
comparison.
I upload this to my home page, when ready.
best regards.
Am 08.12.2011 23:17, schrieb Jed Rothwell:
Mary Yugo<[email protected]> wrote:
There is no problem in measuring temperature on a pipe in general
especially if the thermocouple is properly bonded to the pipe and somewhat
insulated from the surroundings.
I have shown there is no problem even if the thermocopule is improperly
bonded. With a Band Aid! That was deliberate. It was the worst method of
bonding I could come up. I improved it with better tape and insulation. It
made no measurable difference.
Today I shall try to measure the difference in temperature between the
outside of the pipe and the fluid on the inside. I predict that no matter
how badly I bond the thermocouple, it will be reasonably accurate. We'll
see.
There is a big problem if the way the thermocouple is attached
No, there isn't.
and its proximity to the pipe are questionable . . .
Prove it. Do a test and prove it.
- Jed
