I’m trying to measure temperature with a PT1000 using ADS124S06 utiliting a 4-wire measurement.
However, I’m experiencing a little bit of error in the measurement. When I try to substitute the PT1000 with a 1kOhm precision resistor, I get a constant difference of ~19.5Ohm in reading.
How can I get rid of this error? Do I need to do any kinds of calibration prior to starting up the device?
This is my schematic:
My Registers settings are:
IMAG = 250uA
PGA Gain = 1
Internal REF always on.
Thank you very much in advance