We have PT100 sensors directly connected to a cFP-RTD-122 and have the problem of instable temperatures while calibrating the complete system and noise on the signal. With a ferrite filter on the powersupply cable we partly eliminated the noise but still have instable measurements while calibrating, i.e.. yesterday adjusted to 1°C now giving 2°C. Even differences are noticed between inputs on 1 board! What can be the problem?
