Electronics > Metrology

High precision thermocouple scanners?

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mzzj:
Got any hints on "metrology grade" thermocouple scanners?
Looking for something like 16+ channels, built-in CJC with 0.1...0.2 Cel accuracy.

CJC accuracy is usually the weak link in "general purpose" scanners like Keysight 34970A.
AFAIK 34970A CJC specification is something like 0.8Cel and it's not performing any better in real life  :P

3roomlab:
search for "scanner"

https://www.eevblog.com/forum/metrology/scannermultiplexers-for-voltage-references/msg3468296/#msg3468296

https://www.eevblog.com/forum/projects/scan-2000-lv-20-a-low-voltage-scanner-card-for-keithley-2000/msg3328264/#msg3328264

https://www.eevblog.com/forum/projects/20-channel-diy-scanner-card-for-keithley-dmms-and-daqs/

and this is my fav
https://www.eevblog.com/forum/projects/diy-low-thermal-emf-switchscanner-for-comparisons-of-voltage-and-resistor-stand/?all

voltsandjolts:
34970A + PT100

bck:
Additel ADT 286

datasheet is attached
CJC Accuracy is 0.1C

mzzj:

--- Quote from: 3roomlab on October 16, 2021, 04:28:03 pm ---search for "scanner"


--- End quote ---
Didn't see anything specific to my task. I'm looking for thermocouple scanner, not just low thermal EMF scanner.

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