NTC calibration and multiple temperature sensors: Difference between revisions
(→NTC) |
|||
| Line 5: | Line 5: | ||
== NTC == | == NTC == | ||
Note that the temperature of the sensor rises when the current supplies through the resistor. | Note that the temperature of the sensor rises when the current supplies through the resistor. The NTC is nonlinear; see below Calibration. | ||
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]]. Usually <math>R_1 = 10kOhms</math> is used. The total resistance of the circuit is <math>R = R_1 + R_{NTC}</math>, which gives | ||
<math> | <math> | ||
| Line 22: | Line 22: | ||
</math> | </math> | ||
=== | === Calibrating: Steinhart-Hart Equation === | ||
Steinhart-Hart equation is widely used | Steinhart-Hart equation is widely used | ||
Revision as of 15:40, 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. The NTC is nonlinear; see below Calibration.
Negative Temperature Coefficient, NTCLE100E3101JB0 or similar (MF52B NTC Thermistor). The NTC is connected in series with a "shunt" resistor Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle R_1} , see Measurement of resistors: voltage divider. Usually is used. The total resistance of the circuit is , which gives
Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \begin{align} R_{NTC} &= \frac{U_\text{measured}}{U-U_\text{measured}}R_1 \\ \end{align} }
Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \begin{align} R_{NTC} &= \frac{U_\text{measured}}{U-U_\text{measured}}R_1 \\ \end{align} }
Calibrating: Steinhart-Hart Equation
Steinhart-Hart equation is widely used
Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \frac 1T = A + B \ln(Rt) + C (\ln (Rt))^3 }
= LM35DZ
==
