On Tuesday 27 May 2008 11:31:49 pm Patrick wrote:
I tried to use a cheap IR thermometer to do some quick, pre-circuit
analysis tests, a couple of years ago on a particular job.
It went bad, the laser did not even line up with the area being
measured, I missed a burning hot capacitor and
I found a cheap IR sensor (not a spot meter) useful to identify the
one IC that's warmer than the others in a fully populated PWB.
I usually use my fingers for that sort of test. :)
Warning. Don't try it on really hot chips! I have a small lump on my thumb
leftover from touching a chip
Hello Patrick,
you got already a lot of good comments.
I am using since years a IR temp measurement tool from Snap-on,
mod. RTEMP2PB, with a resolution of 0.1 deg. showing in deg. C
and F. The distance to spot size is 8:1, a more narrow range would
be sometimes preferable but for most cases it
Patrick,
After many attempts to get repeatable results from
various IR spot thermometers, our design group
spent a few $$ with a local independent test lab
using their big $$ IR imaging system.
The results were amazing prompted us to just
bite the bullet get one. They have since dropped
in
Dear Time-Nuts,
A not so off the topic question:
Does anyone have some documentation on HP 2804a thermometer? It is
using a quarz crystal as the probe, and therefore is an object of
interest for the true time-nut.
Predrag Dukic
At 16:25 28.5.2008, you wrote:
Patrick,
After many attempts
Hey Everybody
I tried to use a cheap IR thermometer to do some quick, pre-circuit
analysis tests, a couple of years ago on a particular job.
It went bad, the laser did not even line up with the area being
measured, I missed a burning hot capacitor and wasted a lot of time.
I was thinking
Hi Patrick:
Many decades ago I used a Barnes Engineering spot IR sensor. It's cost tens of
thousands of dollars and had a microscope for alignment. The problem then and
now is that you need to know the IR emissivity of the thing you're looking at
in order to get temperatures. If you try to
I got one of the passive detectors from thinkgeek and it does a pretty
decent job. I can tell you which corner of a geode system-on-a-chip
has the bits that are working hardest, for example. Or when I need to
let my brakes cool off after doing laps at the race track.
measurement
Subject: Re: [time-nuts] Thoughts on IR thermometers?
Hi Patrick:
Many decades ago I used a Barnes Engineering spot IR sensor.
It's cost tens of thousands of dollars and had a microscope
for alignment. The problem then and now is that you need to
know the IR emissivity
On Tue, 27 May 2008 23:31:49 -0400, Patrick [EMAIL PROTECTED] wrote:
Hey Everybody
I tried to use a cheap IR thermometer to do some quick, pre-circuit
analysis tests, a couple of years ago on a particular job.
It went bad, the laser did not even line up with the area being
measured, I missed
Just on the subject of body temperature,
the IR thermometers are quite good for skin temperature as the
emmissivity of people is high,
BUT, skin temperature is about 31 C, and is not core temperature,
Hence the need to stick thermometers under tongue or elswhere where
it is close to core.
11 matches
Mail list logo
