ITS-90 Table for type N thermocouple °C 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 Thermoelectric Voltage in mV -270 -4.345 -260 -4.336 -4.337 -4.339 -4.340 -4.341 -4.342 -4.343 -4.344 -4.344 -4.345 -4.345 -250 -4.313 -4.316 -4.319 -4.321 -4.324 -4.326 -4.328 -4.330 -4.332 -4.334 -4.336 -240 -4.277 -4.281 -4.285 -4.289 -4.293 -4.297 -4.300 -4.304 -4.307 -4.310 -4.313 -230 -4.226 -4.232 -4.238 -4.243 -4.248 -4.254 -4.258 -4.263 -4.268 -4.273 -4.277 -220 -4.162 -4.169 -4.176 -4.183 -4.189 -4.196 -4.202 -4.209 -4.215 -4.221 -4.226 -210 -4.083 -4.091 -4.100 -4.108 -4.116 -4.124 -4.132 -4.140 -4.147 -4.154 -4.162 -200 -3.990 -4.000 -4.010 -4.020 -4.029 -4.038 -4.048 -4.057 -4.066 -4.074 -4.083 -190 -3.884 -3.896 -3.907 -3.918 -3.928 -3.939 -3.950 -3.960 -3.970 -3.980 -3.990 -180 -3.766 -3.778 -3.790 -3.803 -3.815 -3.827 -3.838 -3.850 -3.862 -3.873 -3.884 -170 -3.634 -3.648 -3.662 -3.675 -3.688 -3.702 -3.715 -3.728 -3.740 -3.753 -3.766 -160 -3.491 -3.506 -3.521 -3.535 -3.550 -3.564 -3.578 -3.593 -3.607 -3.621 -3.634 -150 -3.336 -3.352 -3.368 -3.384 -3.400 -3.415 -3.431 -3.446 -3.461 -3.476 -3.491 -140 -3.171 -3.188 -3.205 -3.221 -3.238 -3.255 -3.271 -3.288 -3.304 -3.320 -3.336 -130 -2.994 -3.012 -3.030 -3.048 -3.066 -3.084 -3.101 -3.119 -3.136 -3.153 -3.171 -120 -2.808 -2.827 -2.846 -2.865 -2.883 -2.902 -2.921 -2.939 -2.958 -2.976 -2.994 -110 -2.612 -2.632 -2.652 -2.672 -2.691 -2.711 -2.730 -2.750 -2.769 -2.789 -2.808 -100 -2.407 -2.428 -2.448 -2.469 -2.490 -2.510 -2.531 -2.551 -2.571 -2.592 -2.612 -90 -2.193 -2.215 -2.237 -2.258 -2.280 -2.301 -2.322 -2.344 -2.365 -2.386 -2.407 -80 -1.972 -1.995 -2.017 -2.039 -2.062 -2.084 -2.106 -2.128 -2.150 -2.172 -2.193 -70 -1.744 -1.767 -1.790 -1.813 -1.836 -1.859 -1.882 -1.905 -1.927 -1.950 -1.972 -60 -1.509 -1.533 -1.557 -1.580 -1.604 -1.627 -1.651 -1.674 -1.698 -1.721 -1.744 -50 -1.269 -1.293 -1.317 -1.341 -1.366 -1.390 -1.414 -1.438 -1.462 -1.485 -1.509 -40 -1.023 -1.048 -1.072 -1.097 -1.122 -1.146 -1.171 -1.195 -1.220 -1.244 -1.269 -30 -0.772 -0.798 -0.823 -0.848 -0.873 -0.898 -0.923 -0.948 -0.973 -0.998 -1.023 -20 -0.518 -0.544 -0.569 -0.595 -0.620 -0.646 -0.671 -0.696 -0.722 -0.747 -0.772 -10 -0.260 -0.286 -0.312 -0.338 -0.364 -0.390 -0.415 -0.441 -0.467 -0.492 -0.518 0 0.000 -0.026 -0.052 -0.078 -0.104 -0.131 -0.157 -0.183 -0.209 -0.234 -0.260 °C 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 ITS-90 Table for type N thermocouple °C 0 1 2 3 4 5 6 7 8 9 10 Thermoelectric Voltage in mV 0 0.000 0.026 0.052 0.078 0.104 0.130 0.156 0.182 0.208 0.235 0.261 10 0.261 0.287 0.313 0.340 0.366 0.393 0.419 0.446 0.472 0.499 0.525 20 0.525 0.552 0.578 0.605 0.632 0.659 0.685 0.712 0.739 0.766 0.793 30 0.793 0.820 0.847 0.874 0.901 0.928 0.955 0.983 1.010 1.037 1.065 40 1.065 1.092 1.119 1.147 1.174 1.202 1.229 1.257 1.284 1.312 1.340 50 1.340 1.368 1.395 1.423 1.451 1.479 1.507 1.535 1.563 1.591 1.619 60 1.619 1.647 1.675 1.703 1.732 1.760 1.788 1.817 1.845 1.873 1.902 70 1.902 1.930 1.959 1.988 2.016 2.045 2.074 2.102 2.131 2.160 2.189 80 2.189 2.218 2.247 2.276 2.305 2.334 2.363 2.392 2.421 2.450 2.480 90 2.480 2.509 2.538 2.568 2.597 2.626 2.656 2.685 2.715 2.744 2.774 100 2.774 2.804 2.833 2.863 2.893 2.923 2.953 2.983 3.012 3.042 3.072 110 3.072 3.102 3.133 3.163 3.193 3.223 3.253 3.283 3.314 3.344 3.374 120 3.374 3.405 3.435 3.466 3.496 3.527 3.557 3.588 3.619 3.649 3.680 130 3.680 3.711 3.742 3.772 3.803 3.834 3.865 3.896 3.927 3.958 3.989 140 3.989 4.020 4.051 4.083 4.114 4.145 4.176 4.208 4.239 4.270 4.302 150 4.302 4.333 4.365 4.396 4.428 4.459 4.491 4.523 4.554 4.586 4.618 160 4.618 4.650 4.681 4.713 4.745 4.777 4.809 4.841 4.873 4.905 4.937 170 4.937 4.969 5.001 5.033 5.066 5.098 5.130 5.162 5.195 5.227 5.259 180 5.259 5.292 5.324 5.357 5.389 5.422 5.454 5.487 5.520 5.552 5.585 190 5.585 5.618 5.650 5.683 5.716 5.749 5.782 5.815 5.847 5.880 5.913 200 5.913 5.946 5.979 6.013 6.046 6.079 6.112 6.145 6.178 6.211 6.245 210 6.245 6.278 6.311 6.345 6.378 6.411 6.445 6.478 6.512 6.545 6.579 220 6.579 6.612 6.646 6.680 6.713 6.747 6.781 6.814 6.848 6.882 6.916 230 6.916 6.949 6.983 7.017 7.051 7.085 7.119 7.153 7.187 7.221 7.255 240 7.255 7.289 7.323 7.357 7.392 7.426 7.460 7.494 7.528 7.563 7.597 250 7.597 7.631 7.666 7.700 7.734 7.769 7.803 7.838 7.872 7.907 7.941 260 7.941 7.976 8.010 8.045 8.080 8.114 8.149 8.184 8.218 8.253 8.288 270 8.288 8.323 8.358 8.392 8.427 8.462 8.497 8.532 8.567 8.602 8.637 280 8.637 8.672 8.707 8.742 8.777 8.812 8.847 8.882 8.918 8.953 8.988 290 8.988 9.023 9.058 9.094 9.129 9.164 9.200 9.235 9.270 9.306 9.341 300 9.341 9.377 9.412 9.448 9.483 9.519 9.554 9.590 9.625 9.661 9.696 310 9.696 9.732 9.768 9.803 9.839 9.875 9.910 9.946 9.982 10.018 10.054 320 10.054 10.089 10.125 10.161 10.197 10.233 10.269 10.305 10.341 10.377 10.413 330 10.413 10.449 10.485 10.521 10.557 10.593 10.629 10.665 10.701 10.737 10.774 340 10.774 10.810 10.846 10.882 10.918 10.955 10.991 11.027 11.064 11.100 11.136 350 11.136 11.173 11.209 11.245 11.282 11.318 11.355 11.391 11.428 11.464 11.501 360 11.501 11.537 11.574 11.610 11.647 11.683 11.720 11.757 11.793 11.830 11.867 370 11.867 11.903 11.940 11.977 12.013 12.050 12.087 12.124 12.160 12.197 12.234 380 12.234 12.271 12.308 12.345 12.382 12.418 12.455 12.492 12.529 12.566 12.603 390 12.603 12.640 12.677 12.714 12.751 12.788 12.825 12.862 12.899 12.937 12.974 400 12.974 13.011 13.048 13.085 13.122 13.159 13.197 13.234 13.271 13.308 13.346 410 13.346 13.383 13.420 13.457 13.495 13.532 13.569 13.607 13.644 13.682 13.719 420 13.719 13.756 13.794 13.831 13.869 13.906 13.944 13.981 14.019 14.056 14.094 430 14.094 14.131 14.169 14.206 14.244 14.281 14.319 14.356 14.394 14.432 14.469 440 14.469 14.507 14.545 14.582 14.620 14.658 14.695 14.733 14.771 14.809 14.846 450 14.846 14.884 14.922 14.960 14.998 15.035 15.073 15.111 15.149 15.187 15.225 460 15.225 15.262 15.300 15.338 15.376 15.414 15.452 15.490 15.528 15.566 15.604 470 15.604 15.642 15.680 15.718 15.756 15.794 15.832 15.870 15.908 15.946 15.984 480 15.984 16.022 16.060 16.099 16.137 16.175 16.213 16.251 16.289 16.327 16.366 490 16.366 16.404 16.442 16.480 16.518 16.557 16.595 16.633 16.671 16.710 16.748 °C 0 1 2 3 4 5 6 7 8 9 10 ITS-90 Table for type N thermocouple °C 0 1 2 3 4 5 6 7 8 9 10 Thermoelectric Voltage in mV 500 16.748 16.786 16.824 16.863 16.901 16.939 16.978 17.016 17.054 17.093 17.131 510 17.131 17.169 17.208 17.246 17.285 17.323 17.361 17.400 17.438 17.477 17.515 520 17.515 17.554 17.592 17.630 17.669 17.707 17.746 17.784 17.823 17.861 17.900 530 17.900 17.938 17.977 18.016 18.054 18.093 18.131 18.170 18.208 18.247 18.286 540 18.286 18.324 18.363 18.401 18.440 18.479 18.517 18.556 18.595 18.633 18.672 550 18.672 18.711 18.749 18.788 18.827 18.865 18.904 18.943 18.982 19.020 19.059 560 19.059 19.098 19.136 19.175 19.214 19.253 19.292 19.330 19.369 19.408 19.447 570 19.447 19.485 19.524 19.563 19.602 19.641 19.680 19.718 19.757 19.796 19.835 580 19.835 19.874 19.913 19.952 19.990 20.029 20.068 20.107 20.146 20.185 20.224 590 20.224 20.263 20.302 20.341 20.379 20.418 20.457 20.496 20.535 20.574 20.613 600 20.613 20.652 20.691 20.730 20.769 20.808 20.847 20.886 20.925 20.964 21.003 610 21.003 21.042 21.081 21.120 21.159 21.198 21.237 21.276 21.315 21.354 21.393 620 21.393 21.432 21.471 21.510 21.549 21.588 21.628 21.667 21.706 21.745 21.784 630 21.784 21.823 21.862 21.901 21.940 21.979 22.018 22.058 22.097 22.136 22.175 640 22.175 22.214 22.253 22.292 22.331 22.370 22.410 22.449 22.488 22.527 22.566 650 22.566 22.605 22.644 22.684 22.723 22.762 22.801 22.840 22.879 22.919 22.958 660 22.958 22.997 23.036 23.075 23.115 23.154 23.193 23.232 23.271 23.311 23.350 670 23.350 23.389 23.428 23.467 23.507 23.546 23.585 23.624 23.663 23.703 23.742 680 23.742 23.781 23.820 23.860 23.899 23.938 23.977 24.016 24.056 24.095 24.134 690 24.134 24.173 24.213 24.252 24.291 24.330 24.370 24.409 24.448 24.487 24.527 700 24.527 24.566 24.605 24.644 24.684 24.723 24.762 24.801 24.841 24.880 24.919 710 24.919 24.959 24.998 25.037 25.076 25.116 25.155 25.194 25.233 25.273 25.312 720 25.312 25.351 25.391 25.430 25.469 25.508 25.548 25.587 25.626 25.666 25.705 730 25.705 25.744 25.783 25.823 25.862 25.901 25.941 25.980 26.019 26.058 26.098 740 26.098 26.137 26.176 26.216 26.255 26.294 26.333 26.373 26.412 26.451 26.491 750 26.491 26.530 26.569 26.608 26.648 26.687 26.726 26.766 26.805 26.844 26.883 760 26.883 26.923 26.962 27.001 27.041 27.080 27.119 27.158 27.198 27.237 27.276 770 27.276 27.316 27.355 27.394 27.433 27.473 27.512 27.551 27.591 27.630 27.669 780 27.669 27.708 27.748 27.787 27.826 27.866 27.905 27.944 27.983 28.023 28.062 790 28.062 28.101 28.140 28.180 28.219 28.258 28.297 28.337 28.376 28.415 28.455 800 28.455 28.494 28.533 28.572 28.612 28.651 28.690 28.729 28.769 28.808 28.847 810 28.847 28.886 28.926 28.965 29.004 29.043 29.083 29.122 29.161 29.200 29.239 820 29.239 29.279 29.318 29.357 29.396 29.436 29.475 29.514 29.553 29.592 29.632 830 29.632 29.671 29.710 29.749 29.789 29.828 29.867 29.906 29.945 29.985 30.024 840 30.024 30.063 30.102 30.141 30.181 30.220 30.259 30.298 30.337 30.376 30.416 850 30.416 30.455 30.494 30.533 30.572 30.611 30.651 30.690 30.729 30.768 30.807 860 30.807 30.846 30.886 30.925 30.964 31.003 31.042 31.081 31.120 31.160 31.199 870 31.199 31.238 31.277 31.316 31.355 31.394 31.433 31.473 31.512 31.551 31.590 880 31.590 31.629 31.668 31.707 31.746 31.785 31.824 31.863 31.903 31.942 31.981 890 31.981 32.020 32.059 32.098 32.137 32.176 32.215 32.254 32.293 32.332 32.371 900 32.371 32.410 32.449 32.488 32.527 32.566 32.605 32.644 32.683 32.722 32.761 910 32.761 32.800 32.839 32.878 32.917 32.956 32.995 33.034 33.073 33.112 33.151 920 33.151 33.190 33.229 33.268 33.307 33.346 33.385 33.424 33.463 33.502 33.541 930 33.541 33.580 33.619 33.658 33.697 33.736 33.774 33.813 33.852 33.891 33.930 940 33.930 33.969 34.008 34.047 34.086 34.124 34.163 34.202 34.241 34.280 34.319 950 34.319 34.358 34.396 34.435 34.474 34.513 34.552 34.591 34.629 34.668 34.707 960 34.707 34.746 34.785 34.823 34.862 34.901 34.940 34.979 35.017 35.056 35.095 970 35.095 35.134 35.172 35.211 35.250 35.289 35.327 35.366 35.405 35.444 35.482 980 35.482 35.521 35.560 35.598 35.637 35.676 35.714 35.753 35.792 35.831 35.869 990 35.869 35.908 35.946 35.985 36.024 36.062 36.101 36.140 36.178 36.217 36.256 °C 0 1 2 3 4 5 6 7 8 9 10 ITS-90 Table for type N thermocouple °C 0 1 2 3 4 5 6 7 8 9 10 Thermoelectric Voltage in mV 1000 36.256 36.294 36.333 36.371 36.410 36.449 36.487 36.526 36.564 36.603 36.641 1010 36.641 36.680 36.718 36.757 36.796 36.834 36.873 36.911 36.950 36.988 37.027 1020 37.027 37.065 37.104 37.142 37.181 37.219 37.258 37.296 37.334 37.373 37.411 1030 37.411 37.450 37.488 37.527 37.565 37.603 37.642 37.680 37.719 37.757 37.795 1040 37.795 37.834 37.872 37.911 37.949 37.987 38.026 38.064 38.102 38.141 38.179 1050 38.179 38.217 38.256 38.294 38.332 38.370 38.409 38.447 38.485 38.524 38.562 1060 38.562 38.600 38.638 38.677 38.715 38.753 38.791 38.829 38.868 38.906 38.944 1070 38.944 38.982 39.020 39.059 39.097 39.135 39.173 39.211 39.249 39.287 39.326 1080 39.326 39.364 39.402 39.440 39.478 39.516 39.554 39.592 39.630 39.668 39.706 1090 39.706 39.744 39.783 39.821 39.859 39.897 39.935 39.973 40.011 40.049 40.087 1100 40.087 40.125 40.163 40.201 40.238 40.276 40.314 40.352 40.390 40.428 40.466 1110 40.466 40.504 40.542 40.580 40.618 40.655 40.693 40.731 40.769 40.807 40.845 1120 40.845 40.883 40.920 40.958 40.996 41.034 41.072 41.109 41.147 41.185 41.223 1130 41.223 41.260 41.298 41.336 41.374 41.411 41.449 41.487 41.525 41.562 41.600 1140 41.600 41.638 41.675 41.713 41.751 41.788 41.826 41.864 41.901 41.939 41.976 1150 41.976 42.014 42.052 42.089 42.127 42.164 42.202 42.239 42.277 42.314 42.352 1160 42.352 42.390 42.427 42.465 42.502 42.540 42.577 42.614 42.652 42.689 42.727 1170 42.727 42.764 42.802 42.839 42.877 42.914 42.951 42.989 43.026 43.064 43.101 1180 43.101 43.138 43.176 43.213 43.250 43.288 43.325 43.362 43.399 43.437 43.474 1190 43.474 43.511 43.549 43.586 43.623 43.660 43.698 43.735 43.772 43.809 43.846 1200 43.846 43.884 43.921 43.958 43.995 44.032 44.069 44.106 44.144 44.181 44.218 1210 44.218 44.255 44.292 44.329 44.366 44.403 44.440 44.477 44.514 44.551 44.588 1220 44.588 44.625 44.662 44.699 44.736 44.773 44.810 44.847 44.884 44.921 44.958 1230 44.958 44.995 45.032 45.069 45.105 45.142 45.179 45.216 45.253 45.290 45.326 1240 45.326 45.363 45.400 45.437 45.474 45.510 45.547 45.584 45.621 45.657 45.694 1250 45.694 45.731 45.767 45.804 45.841 45.877 45.914 45.951 45.987 46.024 46.060 1260 46.060 46.097 46.133 46.170 46.207 46.243 46.280 46.316 46.353 46.389 46.425 1270 46.425 46.462 46.498 46.535 46.571 46.608 46.644 46.680 46.717 46.753 46.789 1280 46.789 46.826 46.862 46.898 46.935 46.971 47.007 47.043 47.079 47.116 47.152 1290 47.152 47.188 47.224 47.260 47.296 47.333 47.369 47.405 47.441 47.477 47.513 1300 47.513 °C 0 1 2 3 4 5 6 7 8 9 10 ************************************ * This section contains coefficients for type N thermocouples for * the two subranges of temperature listed below. The coefficients * are in units of °C and mV and are listed in the order of constant * term up to the highest order. The equation is of the form * E = sum(i=0 to n) c_i t^i. * * Temperature Range (°C) * -270.000 to 0.000 * 0.000 to 1300.000 ************************************ name: reference function on ITS-90 type: N temperature units: °C emf units: mV range: -270.000, 0.000, 8 0.000000000000E+00 0.261591059620E-01 0.109574842280E-04 -0.938411115540E-07 -0.464120397590E-10 -0.263033577160E-11 -0.226534380030E-13 -0.760893007910E-16 -0.934196678350E-19 range: 0.000, 1300.000, 10 0.000000000000E+00 0.259293946010E-01 0.157101418800E-04 0.438256272370E-07 -0.252611697940E-09 0.643118193390E-12 -0.100634715190E-14 0.997453389920E-18 -0.608632456070E-21 0.208492293390E-24 -0.306821961510E-28 ************************************ * This section contains coefficients of approximate inverse * functions for type N thermocouples for the subranges of * temperature and voltage listed below. The range of errors of * the approximate inverse function for each subrange is also given. * The coefficients are in units of °C and mV and are listed in * the order of constant term up to the highest order. * The equation is of the form t_90 = d_0 + d_1*E + d_2*E^2 + ... * + d_n*E^n, * where E is in mV and t_90 is in °C. * * Temperature Voltage Error * range range range * (°C) (mV) (° C) * -200. to 0. -3.990 to 0.000 -0.02 to 0.03 * 0. to 600. 0.000 to 20.613 -0.02 to 0.03 * 600. to 1300. 20.613 to 47.513 -0.04 to 0.02 ******************************************************** Inverse coefficients for type N: Temperature -200. 0. 600. Range: 0. 600. 1300. Voltage -3.990 0.000 20.613 Range: 0.000 20.613 47.513 0.0000000E+00 0.00000E+00 1.972485E+01 3.8436847E+01 3.86896E+01 3.300943E+01 1.1010485E+00 -1.08267E+00 -3.915159E-01 5.2229312E+00 4.70205E-02 9.855391E-03 7.2060525E+00 -2.12169E-06 -1.274371E-04 5.8488586E+00 -1.17272E-04 7.767022E-07 2.7754916E+00 5.39280E-06 0.000000E+00 7.7075166E-01 -7.98156E-08 0.000000E+00 1.1582665E-01 0.00000E+00 0.000000E+00 7.3138868E-03 0.00000E+00 0.000000E+00 Error -0.02 -0.02 -0.04 Range: 0.03 0.03 0.02