Wednesday, January 26, 2011

CrazyEngineers Forum - Other Engineering Trades

CrazyEngineers Forum - Other Engineering Trades

Experienced instrumentation engineers wanted urgently....

Posted: 26 Jan 2011 04:16 AM PST

O.K,please help me, i need help ASAP


i have a little challenge and i have been on it for the past 4 days now. we did an experiment with a thermistor, and ii took the reading of the thermistor both while heating the thermistor,and while it was cooling. (from 20 degree - 70 degree). got my reading, and i plot the graph of Ln R Against 1/T to get the intercept and slope for my A and B

R= r A exp(B/T)

and i have a non linear graph, i have calculated the non linearity and the sensitivity of this thermistor, but the question for this experiment is "design a model to make this thermistor have a linear characteristic."

i have been on it for 4 days now, and am not just heading anywhere.. i need your help sir, how do i go abt it, and how do i calculate the variable i need....

i saw this site

http://www.dutchforce.com/~eforum/index.php?showtopic=35150

and even got more confused, because i dnt know what type of thermistor it is. but all i know is the thermistor has a very very thin finger and a plier like shape.

please sir, how can you help me.am freaking out and confused
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