NTC calibration and multiple temperature sensors: Difference between revisions

From wikiluntti
Line 4: Line 4:


== NTC ==
== NTC ==
Note that the temperature of the sensor rises when the current supplies through the resistor.


Negative Temperature Coefficient, NTCLE100E3101JB0 or similar (MF52B NTC Thermistor). The NTC is connected in series with a "shunt" resistor <math>R_1</math>, see [[Measurement of resistors: voltage divider]]. The total resistance of the circuit is <math>R = R_1 + R_{NTC}</math>, which gives  
Negative Temperature Coefficient, NTCLE100E3101JB0 or similar (MF52B NTC Thermistor). The NTC is connected in series with a "shunt" resistor <math>R_1</math>, see [[Measurement of resistors: voltage divider]]. The total resistance of the circuit is <math>R = R_1 + R_{NTC}</math>, which gives  


<math>
<math>
\begin{align*}
\begin{align}
R_{NTC} &= \frac{U_\text{measured}}{U-U_\text{measured}}R_1 \\
R_{NTC} &= \frac{U_\text{measured}}{U-U_\text{measured}}R_1 \\
\end{align*}
\end{align}
</math>
</math>




<math>
<math>
\begin{align*}
\begin{align}
R_{NTC} &= \frac{U_\text{measured}}{U-U_\text{measured}}R_1 \\
R_{NTC} &= \frac{U_\text{measured}}{U-U_\text{measured}}R_1 \\
\end{align*}
\end{align}
</math>
</math>


=== Calibarating: Steinhart-Hart Equation ===
Steinhart-Hart equation is widely used
<math>
\frac 1T = A + B \ln(Rt= + C (\ln (Rt))^3
</math>


=== LM35DZ ==  
=== LM35DZ ==  


==
==

Revision as of 15:36, 6 September 2023

Introduction

Calibration of NTC sensors and different

NTC

Note that the temperature of the sensor rises when the current supplies through the resistor.

Negative Temperature Coefficient, NTCLE100E3101JB0 or similar (MF52B NTC Thermistor). The NTC is connected in series with a "shunt" resistor , see Measurement of resistors: voltage divider. The total resistance of the circuit is , which gives


Calibarating: Steinhart-Hart Equation

Steinhart-Hart equation is widely used

= LM35DZ

==