I have a NI9219 in Compact DAQ 4slots USB and i want to measure a PT1000 in 4-wire resistance mode.
It works in 2-wire resistance mode correctly, but in 4-wire mode it shows always 10.5 k!
The used test wiring is only 50 cm long. The real wiring lengh should be about 50 m.
So what can I do? What is wrong?
I have no ideas anymore.