I have a problem with data collected with the PT-104 from 4 PT100 probes.
The data I am getting out fluctuates widely, going from around 50 degrees Celcius (Average) to 70-80 and down to zero.
I am measuring on a closed circuit consisting of a heat source that heats up oil, the oil is then passed through a heat exchanger, cooled by water passing through th other side of the system.
The 4 PT-100's are placed so that they measure the temperature of the oil and water as i goes in, and comes out of the heat exchanger.
I am using the picolog recorder v. 5.21.1
The setup has previously worked quite fine, with no problems, and only a small variation from one measurement to the next, not the giant steps that i see now.
Since it was last used, nothing has changed in the setup, all that has been done is to power down the system, and let it sit.