??? 08/24/05 14:50 Read: times |
#100004 - hooking the PT100s up to differential in Responding to: ???'s previous message |
what about hooking the PT100s up to differential inputs (of an op-amp)? even without twisted pair wiring(which I doubt you have) differential input cancel a whole lot of noise.
I think you may need individual pre-processing (e.g. above op-amp) before the MUX. Try one input in diff mode, if success, try diff mux, if fail, use individual op-amps Erik |