It’s #sensorsunday and this weekend I finally got to use my DIY thermal chamber 😃
Along with a Fluke thermocouple meter it turned out really good 👍🏼

Doing temperature test on the 1M #vintage reference resistor - it’s big and heavy, so I left it to soak at the wanted temperature for at least 8hrs, continuously monitoring chamber and device temperature.

Testing at 10,20 and 40C, I found a slightly negative temperature coefficient, but still well inside the 0.02% specification.

My measurements are a bit lower altogether compared with my initial test where I saw precisely 1M. This is due to coupling between the test wires, when entering the thermal chamber. It’s really hard to avoid, even giga-ohms in parallel, will affect the result.

#testandmeasurement #electronics #metrology #electronicsengineering #engineer #fluke #sourcemeasureunit #keithley #keithleyinstruments