Re: Arduino + MCP9600 + thermocouple help needed

On Tue, 19 Mar 2024 11:31:57 -0400, Leon Fisk <lfiskgr@gmail.invalid>
wrote:

On Tue, 19 Mar 2024 10:44:31 -0400
"Jim Wilkins" <muratlanne@gmail.com> wrote:
>
<snip>

A 5-1/2 digit Fluke 8800A bench multimeter from around 1980 that I bought
for $25 still matches a calibrated voltage standard to the last count.
Industry dumps equipment (and people) when age makes their reliability
questionable.

>
I picked up (Ebay) a Fluke 8010A and a 37 a few years ago. Was
hoping for the best but they both need work. Would really like to get
the 37 working. It's a lot like my 87 but not quite the same spec. Has
a bargraph display which can be handy when tuning circuits. Made to
sit on a bench or portable. Uses a 9v battery, same as 87 series.
Suspect the input protection, "Varistors" maybe flakey. I ordered some
in but have been too lazy to seriously dig into it? The 8010A may need
some serious switch work/cleaning. Used to see those switches in radio
equipment and they were prone for dirt/noise. Royal pain to desolder
and probably unobtanium to replace nowadays. So need to be carefully
disassembled and cleaned...
>
I don't lack for projects just the drive to do it?

 I've found Stabilant22 can make a HUGE difference in electronic
connections that are "noisy" or intermitternt. Pricy stuff at about
$400 an ounce but it goes a long way. 1/4 ounce mixed with 3/4 oz of
99.9 ethanol makes an ounce of 22E for about $100 - the last ounce
lasted me about 20 years. Just mixed 2 oz of 22E and 2 oz of 22A
(mixed with 99% IPA) yesterday. $5 an ounce for the ethanol and $7 for
half a liter of IPA - (and no, not the hoppy beverage libation 111)

One drop of the stuff can make a noisy control DEAD QUIET. or an
intermittent connection rock solid Used on test lead plugs? fantastic
- electrically virtually identical to a good soldered joint and no
worries about shorts between pins etc. I stumbled across the stuff
when working on American Megatrends mother boards back when all the
memory and most other chips were still socketted and the pin
connections would get flaky from heat cycling. You could re-seat the
chips once every 2 months - or use a bit of Stabilant22 and never
touch them again for 5 years. with 3 year warrany on our machines the
stuff was worth it's weight in platinum in eliminating over 90% of
warranty claims