Interesting part, thanks. The accuracy is pretty good.
These Pt guys are a bit more expensive but nice:
1206 and 0805 thinfilm platinum RTDs are nice and have the virtue of being multi-sourced.
There's a cute one-opamp conditioning and linearizing circuit for platinum RTDs, assuming you don't want to do it in software.
The John Doe troll stated the following in message-id <sdhn7c$pkp$ snipped-for-privacy@dont-email.me:
And the John Doe troll stated the following in message-id <sg3kr7$qt5$ snipped-for-privacy@dont-email.me:
And yet, the clueless John Doe troll has itself posted yet another incorrectly formatted USENET posting on Tue, 14 Dec 2021 06:40:44 -0000 (UTC) in message-id <sp9e9b$q3d$ snipped-for-privacy@dont-email.me.
This posting is a public service announcement for any google groups readers who happen by to point out that the John Doe troll does not even follow it's own rules that it uses to troll other posters.
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John Doe posted his usual drivel (which I've snipped)- he seems to be even more ignorant about low TC resistors than Phil Allison, and even more dedicated to being obnoxious.
On a sunny day (Fri, 10 Dec 2021 22:50:31 +1100) it happened Sylvia Else snipped-for-privacy@email.invalid wrote in snipped-for-privacy@mid.individual.net>:
Used a simple Si diode as temp sensor in some equipment.
-2 mV / degree C or there about, linear at that.
I worked on a design last year where the charging circuit had a thermistor to adjust the batter voltage. I pointed out the resistor was on a board near a motor and other power circuits that would certainly make the PWB hotter than the battery at the other end of the cabinet. The designer didn't care. He would often wax on about the various nits he had picked up over the years and yet could not understand something so simple as a temperature sensing thermistor needed to be thermally coupled to the battery rather than the motor the battery would be driving.
The John Doe troll stated the following in message-id <sdhn7c$pkp$ snipped-for-privacy@dont-email.me:
And the John Doe troll stated the following in message-id <sg3kr7$qt5$ snipped-for-privacy@dont-email.me:
And yet, the clueless John Doe troll has itself posted yet another incorrectly formatted USENET posting on Wed, 15 Dec 2021 18:12:56 -0000 (UTC) in message-id <spdb78$p47$ snipped-for-privacy@dont-email.me.
This posting is a public service announcement for any google groups readers who happen by to point out that the John Doe troll does not even follow it's own rules that it uses to troll other posters.
1jqv3YkW8CYw
In the end, it became apparent that this thermistor is in parallel with an ordinary resistor far away on the board.
Also, that the temperature compensation it provides is much too low. That will be fixed, along with putting the thermistor on the batteries.
Sylvia.
As I've indicated in my reply to Jan, I believe that the circuit in my UPS is not providing anything like the required compensation. Perhaps the designer's remit was to provide some temperature compensation, so he did, without caring whether it was the correct amount.
Sylvia.
Sylvia Else wrote: =================
**As if a lying, autistic tenth wit like you would know . ** Maybe he, she, it had brain tumor - big as yours....... love, Phil
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