John Mitchell wrote:Perhaps Pico could think about addressing this problem in future.
I think they should do so.
We, as part of an accredited lab, uses the TC08-USB with all sensors (type-T) in some applications. The TCÂ´s are of course calibrated and via calculated fit and some look-up tables and other neat software, we can measure accurate to less than 0.1 Â°C, but this has only been achieved by placing the converter in an isolating foam enclosure.
Without insulating, the uncertainty is more than 0,15 Â°C alone from drift of the CJC. Especially the inputs 1 to 4 differs from 5 to 8 (the two rows) if the converter is near some heat source (a human for example).
The input connectors should ideally all have been embedded in a copper rail and the internal temperature sensor bored into that rail.
Alternative a CJC sensor for each input, placed close to the terminal instead of one common thermistor placed in the center of the input terminal area.
On the other hand, I agree that the unit is value for money.