Experienced instrumentation engineers wanted urgently....
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
#-Link-Snipped-#
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. I am freaking out and confused.
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
#-Link-Snipped-#
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. I am freaking out and confused.
Replies
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Ramani Aswath"design a model to make this thermistor have a linear characteristic."
You can only develop an algorithm to linearise the graph. The behaviour of the thermistor is strictly governed by the material it is made of. It may be a Positive Temperature coefficient material or a Negative Temperature Coefficient one. If your semilog plot is linear you have achieved your goal.
#-Link-Snipped-#
Here is a set of semilog linear graphs:
#-Link-Snipped-#
Bioramani
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