Thermistors calculation of base resistance

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SUMMARY

The discussion focuses on calculating the base resistance of a thermistor using the regression equation Y=1.54e^-0.059x, where Y represents resistance and x represents temperature. Participants clarify that the base resistance is typically defined at 25°C, and at 100°C, the resistance is noted as 0.08 ohms. The conversation emphasizes the importance of accurate measurements and understanding the relationship between temperature and resistance for reliable calculations.

PREREQUISITES
  • Understanding of thermistor characteristics, specifically NTC (Negative Temperature Coefficient) behavior.
  • Familiarity with regression equations and their applications in temperature-resistance calculations.
  • Basic knowledge of electrical resistance measurement techniques.
  • Ability to interpret and plot mathematical equations for data analysis.
NEXT STEPS
  • Learn how to accurately measure thermistor resistance at various temperatures.
  • Explore the principles of NTC thermistors and their applications in temperature sensing.
  • Study regression analysis techniques for modeling temperature-resistance relationships.
  • Investigate the effects of self-heating on thermistor measurements and how to mitigate them.
USEFUL FOR

Electrical engineers, students in thermodynamics, and anyone involved in temperature measurement and sensor design will benefit from this discussion.

physocs1
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Using the regression eqn. Find the base resistance of the thermistor.
Find the temp. Of the boiling water using this eqn.

Y=1.54e^-0.059x

How do I go about solving this problem
 
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Is this homework?

Plot the equation for temperatures from 0 to 100°C and study it's shape.

What is meant by the base resistance of the thermistor?
Is Y the resistance?
Is x the temperature?
What was the thermistor resistance when in the boiling water?

Can you put the resistance into the equation?
 
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The resistance value of a thermistor at a specified temperature with negligible electrical power to avoid self heating. Usually base resistance will be defined at 25 °C.
Its a NTC looking shape
I think Y is resistance
X is temp.
Not sure

At 100C: R= 0.08

Could I plug in 25 C and solve for Y?? .
 
physocs1 said:
I think Y is resistance
X is temp.
Not sure
At 100C: R= 0.08
Could I plug in 25 C and solve for Y?? .
You need to find out for sure.
If x is resistance and y is temperature then you need to plug in the resistance to get the temperature.
R= 0.08 ohms is a very low resistance. It is so low that it would be very hard to measure accurately.
You cannot build a reliable answer if you cannot be sure of the numbers and the units.
 

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