my name is John and i am a student at the technical university of Patras, Greece. I could really use some help here, with this RTD "PT 100" temperature sensor. I have developed a temperature data acquisition system using a card, connected to my PC serial port. I have tested it by using a LM 35 (requires Vcc = 5V) temperature sensor and it works. The thing is that i want to adjust a PT 100 temperature sensor. I bought one but...
The PT 100 has 4 wires (2 white, 2 Red), i have tried using my multimeter to measure the output but it doesn'y work (PT 100 ouput 1mV/Celsium). If i connect it to my card then i get 0 input. I was expecting to get an output from the sensor at about 30 mV. What am i doing wrong here? Does anyone has any idea or experience about PT 100 temperature sensors?
Thanks in advance