Type J

Type J Thermocouple

Type J Thermocouple
Data and Polynomial


  • Description
    Fe / Cu-Ni
  • Data source
    National Institute of Science and Technology (NIST)
  • Raw Data
  • Octave format
  • Curve fit
    • mV -> temperature (C)
      e is maximum error (in degrees C)
      v1 andf v2 partition the domain into three segments, each with a polynomial fit
      c is vector of coefficients: a10, a9, ... a0
      Note: Each column of c corresponds to one range (<v1,v1 to v2, >v2)

      e = 0.022665

      v1 = 14.055

      v2 = 27.057

      c =

         -1.8622e-09    1.0470e-09   
      4.7507e-13

          7.0620e-08   -2.1228e-07  
      -2.3768e-10

         -7.4076e-07    1.9278e-05   
      5.2834e-08

         -1.6808e-06   -1.0326e-03   -6.8649e-06

          5.6296e-05   
      3.6124e-02    5.7683e-04

          3.0893e-05   -8.6240e-01  
      -3.2731e-02

         -3.4200e-03    1.4228e+01   
      1.2699e+00

          2.3324e-02   -1.6016e+02  
      -3.3265e+01

         -2.1761e-01    1.1771e+03   
      5.6321e+02

          1.9817e+01   -5.0820e+03  
      -5.5489e+03

         -3.4296e-02    9.8975e+03  
      2.4405e+04





      type_j mV->C
    • temperature -> mV (range -127C-127C)
      e is maximum error (in mV)
      c is vector of coefficients: a10, a9, ... a0

      e = 0.00057012

      c =

         -6.9749e-24

          1.3658e-21

          2.0429e-19

         -5.0990e-17

         -1.4948e-15

          4.6764e-13

          1.3473e-10

         -8.8655e-08

          3.0485e-05

          5.0385e-02

         -1.0519e-06






      type_j temperature->mV curve fit

Previous page: Type E
Next page: Type K