Please enable JavaScript.

Coggle requires JavaScript to display documents.

TEMPERATURE MEASUREMENT, MUHAMMAD AFIQ IKHWAN BIN RASHID 2018291594 -…

- - - - the metal at the bottom of the device is increase with temperature
        
        deflect the pointer scale of temperature
      - its follow the law of the contraction and expansion when heated and cooled
    - - low coeficient of metal expansion
        help to the pointer to deflect up as the temperature is high
      - high coeficient of metal expansion
        help the pointer to deflect down as the temperature is low
- - - - IT WORK UNDER 3 EFFECT
        -SEEBACK EFFECT
        -PELTIER EFFECT
        -THOMSAN EFFECT
        
        SEEBACK EFFECT
        
        CONSIST OF TWO JUNCTION
        -hot junction
        -cold junction
        
        the EMF is generated at 2 junction
        different value of EMF generated based on combination of metal
        
        PELTIER EFFECT
        
        CONSIST OF TWO JUNCTION
        -hot juntion
        -cold junction
        
        the EMF is generated in circuit
        different value of EMF generated based on the temperature between at two junction
        
        THOMSAN EFFECT
        
        CONSIST OF TWO JUCTION
        -hot juction
        -cold junction
        
        the potential difference exist in the circuit due t o temperature Gradient,along the entire length of the conductors with the circuit
        
        so, the value of EMF induced is very small and can be neglected
      - it work with the induced of EMF
- - - - this device consist of crystal that is cut in the form of LC
        
        -detect the change oin frequency of oscillation of 1Hz gives a resolution of 0.001 celcius
        
        the temperature in the range between -40 - 230c can be measured accurately