hi guys i was hoping someone might be able to help me. I am currently trying to design a digital thermometer using a pt100 sensor and a 8051. The pt100 is a (A class) and has an accuracy of +/- 0.15 degrees at 0 degrees. At 0 degrees its resistance is exactly 100.00 ohms.I am trying to keep to that accuracy with my thermometer. But in oder to calibrate it i need to be able to measure the resistance to eg. to 100.00. To keep that accurcy but my multimeter will only show eg. 100.0. Which could cause a error of +/- 0.25 degrees. So my idea is to calculate the resistance using ohms law. And puting a voltage across it and measure the current. But the problem with that is my multimeter accuracy. Which for voltage is 0.3% of the reading + 2 digits. The accuracy the current is 1% of the reading + 2 digits.I was planning on using the 400 microamps range and the 400 mv range. Can anyone suggest how i might be able to calculate what the true readings would be on my multimeter. with those ranges and the accuracy specs i have given as i haven't done much of this stuff before.