LabVIEW temperature measurement with DMM6500 and scanner card - part 2: LabVIEW flow with simulated cold junction temperature

RE: LabVIEW temperature measurement with DMM6500 and scanner card - part 2: LabVIEW flow with simulated cold junction temperature

Jan Cumps — Sun, 12 Mar 2023 17:09:09 GMT

I'm a bit ahead. I designed the flow with external PT100 as cold junction reference, and let the DMM run the design.
All measurements overflow, because the PT100 is not mounted (it's on order, expected somewhere in May).

But the setup definitely works. The channel 1 is set up as the PT100 reference, all other channels configured to use that reference:

Preview of some highlights of the new flow:

RE: LabVIEW temperature measurement with DMM6500 and scanner card - part 2: LabVIEW flow with simulated cold junction temperature

Jan Cumps — Sun, 12 Mar 2023 16:14:37 GMT

Here's the result of measuring my diner room temperature every minute, for an hour:

I measured the cold junction inside the DM6500, next to the contact, with another meter (not precise): 27.4°C at the start. The meter had been on for hours. It's winter here - a chilly day - with the thermostat set to 21.5°C. The heating is doing a reasonable job, it seems.