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Wiki Alutal
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Acessories
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Bimetallic thermometer
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Calibration
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Resistance Thermometers
- 01 - Introdução
- 02 - O Sensor
- 03 - Measurement principle
- 04 - Montagem típica
- 05 - Recomendações
- 06 - Termorresistência Padrão
- 07 - Industrial Thermoresistance
- 08 - Auto Aquecimento
- 09 - Resistência de isolação
- 10 - Vantagens em relação aos termopares
- 11 - Desvantagens em relação aos termopares
- 12 - Tolerância
- 13 - Tabela de Conversão Resistência x Temperatura
- 14 - Tempo de Resposta
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Temperature
- 01 - Heat and Temperature
- 02 - Heat Transmission
- 03 - Thermal Equilibrium
- 04 - Zeroth Law of Thermodynamics
- 06 - Second Law of Thermodynamics
- 07 - Third Law of Thermodynamics
- 08 – Thermometric Scales
- 09 - International Temperature Scale
- 10 – Types of Temperature Sensors
- 11 - Thermoelectric Theory
- 12 - Daniel Gabriel Fahrenheit
- 13 - Anders Celsius
- 14 - Thomas Johann Seebeck
- 15 - Jean Charles Athanase Peltier
- 16 - Willian Thomson (Lorde Kelvin)
- 17 - William John Macquorn Rankine
- 18 - René-Antoine Ferchault de Réaumur
- 19 - Max Karl Ernst Ludwig Planck
- 20 - Electromotive Force
- Temperature > 05 - First Law of Thermodynamics
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Temperature Transmitter
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Thermocouples
- 01 - Introdução
- 02 - Fios termopares
- 03 - Tipos de Termopares
- 04 - Efeito Seebeck
- 05 - Efeito Peltier
- 06 - Efeito Thomson
- 07 - Correlation of Electromotive Force (EMF)
- 08 - As Leis Termoelétricas
- 09 - Homogeneous Circuit Law
- 10 - Intermediate Metals Law
- 11 - Law of Intermediate Temperatures
- 12 - Envelhecimento de Termopares
- 13 - Oscilação de medidas
- 14 - Erros comuns de ligação
- 15 - Normas Temperatura
- 16 - Tipos de Atmosferas
- 17 - Termopar Convencional
- 18 - Termopar de Isolação Mineral
- 19 - Termopares Flexíveis
- 20 - Blindagem Eletrostática/Tempo de Resposta
- 21 - Termopar padrão
- 22 - Thermocouple association
- 23 - Recomendações para instalação de termopares
- 24 - Termopares Especiais
- 25 - Imersão do sensor
- 26 - Magnetização do termopar tipo K
- 27 - Green-Root
- 28 - Termopares partindo de Fios/cabos de Extensão
- 29 - Tabela de conversão Milivoltagem x Temperatura
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Wells
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Wires and extension cords / compensation
Temperature > 11 - Thermoelectric Theory
When, in a closed circuit, formed by two distinct metal conductors, A and B, they are subjected to a temperature difference between their ends, an electromotive force (emf) arises, the value of which does not exceed the order of magnitude of millivolts (mV), as a result of the redistribution of electrons in the conductors.
When this circuit is broken, the open circuit voltage becomes a function of the junction temperatures and the composition of the two metals.
We call the junction at which the temperature to be measured is subjected the Measuring Junction (or hot junction) and the other end that will be connected to the measuring instrument the Reference Junction (or cold junction).
When the temperature of the reference junction (Tr) is kept constant, it is found that the thermal E.M.F. (EAB) is a function of the temperature of the measuring junction (T1). This allows this circuit to be used as a temperature meter, since knowing the Tr and the generated E.M.F., T1 is determined.
EAB = f(ΔT)
EAB = ET1 - ETr
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