一.PT100鉑熱電阻定義:
PT100鉑熱電阻的阻值跟溫度的變化成正比。PT100的阻值與溫度變化關(guān)系為:當(dāng)PT100溫度為0℃時(shí)它的阻值為100歐姆,在100℃時(shí)它的阻值約為138.5歐姆。它的工業(yè)原理:當(dāng)PT100在0攝氏度的時(shí)候他的阻值為100歐姆,它的阻值會(huì)隨著溫度上升而成勻速增長(zhǎng)的。金屬熱電阻的電阻值和溫度一般可以用以下的近似關(guān)系式表示,即 Rt=Rt0[1+α(t-t0)] 式中,Rt為溫度t時(shí)的阻值;Rt0為溫度t0(通常t0=0℃)時(shí)對(duì)應(yīng)電阻值;α為溫度系數(shù)?!“雽?dǎo)體熱敏電阻的阻值和溫度關(guān)系為:Rt=AeB/t式中Rt為溫度為t時(shí)的阻值;A、B取決于半導(dǎo)體材料的結(jié)構(gòu)的常數(shù)。相比較而言,熱敏電阻的溫度系數(shù)更大,常溫下的電阻值更高(通常在數(shù)千歐以上),但互換性較差,非線性嚴(yán)重,測(cè)溫范圍只有-50~300℃左右,大量用于家電和汽車用溫度檢測(cè)和控制。熱電阻一般適用于-200~500℃范圍內(nèi)的溫度測(cè)量,其特點(diǎn)是測(cè)量準(zhǔn)確、穩(wěn)定性好、性能可靠,在程控制中的應(yīng)用極其廣泛。PT100鉑熱電阻應(yīng)用范圍:醫(yī)療、電機(jī)、工業(yè)、溫度計(jì)算、阻值計(jì)算等高精溫度設(shè)備,應(yīng)用范圍非常之廣泛。
二.PT100分度表:
Pt100 型鉑熱電阻分度表 | ||||||||||
溫度℃ | 電阻值(Ω)(JJG 229-2010)R0=100.00Ω | |||||||||
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
-200 | 18.49 | - | - | - | - | - | - | - | - | - |
-190 | 22.8 | 22.37 | 21.94 | 21.51 | 21.08 | 20.65 | 20.22 | 19.79 | 19.36 | 18.93 |
-180 | 27.08 | 26.65 | 26.23 | 25.8 | 25.37 | 24.94 | 24.52 | 24.09 | 23.66 | 23.23 |
-170 | 31.32 | 30.9 | 30.47 | 30.05 | 29.63 | 29.2 | 28.78 | 28.35 | 27.93 | 27.5 |
-160 | 35.53 | 35.11 | 34.69 | 34.27 | 33.85 | 33.43 | 33.01 | 32.59 | 32.16 | 31.74 |
-150 | 39.71 | 39.3 | 38.88 | 38.46 | 38.04 | 37.63 | 37.21 | 36.79 | 36.37 | 35.95 |
-140 | 43.87 | 43.45 | 43.04 | 42.63 | 42.21 | 41.79 | 41.38 | 40.96 | 40.55 | 40.13 |
-130 | 48 | 47.59 | 47.18 | 46.76 | 46.35 | 45.94 | 45.52 | 45.11 | 44.7 | 44.28 |
-120 | 52.11 | 51.7 | 51.2 | 50.88 | 50.47 | 50.06 | 49.64 | 49.23 | 48.82 | 48.41 |
-110 | 56.19 | 55.78 | 55.38 | 54.97 | 54.56 | 54.15 | 53.74 | 53.33 | 52.92 | 52.52 |
-100 | 60.25 | 59.85 | 59.44 | 59.04 | 58.63 | 58.22 | 57.82 | 57.41 | 57 | 56.6 |
-90 | 64.3 | 63.9 | 63.49 | 63.09 | 62.68 | 62.28 | 61.87 | 61.47 | 61.06 | 60.66 |
-80 | 68.33 | 67.92 | 67.52 | 67.12 | 66.72 | 66.31 | 65.91 | 65.51 | 65.11 | 64.7 |
-70 | 72.33 | 71.93 | 71.53 | 71.13 | 70.73 | 70.33 | 69.93 | 69.53 | 69.13 | 68.73 |
-60 | 76.33 | 75.93 | 75.53 | 75.13 | 74.73 | 74.33 | 73.93 | 73.53 | 73.13 | 72.73 |
-50 | 80.31 | 79.91 | 79.51 | 79.11 | 78.72 | 78.32 | 77.92 | 77.52 | 77.13 | 76.73 |
-40 | 84.27 | 83.88 | 83.48 | 83.08 | 82.69 | 82.29 | 81.89 | 81.5 | 81.1 | 80.7 |
-30 | 88.22 | 87.83 | 87.43 | 87.04 | 86.64 | 86.25 | 85.85 | 85.46 | 85.06 | 84.67 |
-20 | 92.16 | 91.77 | 91.37 | 90.98 | 90.59 | 90.19 | 89.8 | 89.4 | 89.01 | 88.62 |
-10 | 96.09 | 95.69 | 95.3 | 94.91 | 94.52 | 94.12 | 93.75 | 93.34 | 92.95 | 92.55 |
0 | 100 | 99.61 | 99.22 | 98.83 | 98.44 | 98.04 | 97.65 | 97.26 | 96.87 | 96.48 |
溫度℃ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
0 | 100 | 100.39 | 100.78 | 101.17 | 101.56 | 101.95 | 102.34 | 102.73 | 103.12 | 103.51 |
10 | 103.9 | 104.29 | 104.68 | 105.07 | 105.46 | 105.85 | 106.24 | 106.63 | 107.02 | 107.4 |
20 | 107.79 | 108.18 | 108.57 | 108.96 | 109.35 | 109.73 | 110.12 | 110.51 | 110.9 | 111.28 |
30 | 111.67 | 112.06 | 112.45 | 112.83 | 113.22 | 113.61 | 113.99 | 114.38 | 114.77 | 115.15 |
40 | 115.54 | 115.93 | 116.31 | 116.7 | 117.08 | 117.47 | 117.85 | 118.24 | 118.62 | 119.01 |
50 | 119.4 | 119.78 | 120.16 | 120.55 | 120.93 | 121.32 | 121.7 | 122.09 | 122.47 | 122.86 |
60 | 123.24 | 123.62 | 124.01 | 124.39 | 124.77 | 125.16 | 125.54 | 125.92 | 126.31 | 126.69 |
70 | 127.07 | 127.45 | 127.84 | 128.22 | 128.6 | 128.98 | 129.37 | 129.75 | 130.13 | 130.51 |
80 | 130.89 | 131.27 | 131.66 | 132.04 | 132.42 | 132.8 | 133.18 | 133.56 | 133.94 | 134.32 |
90 | 134.7 | 135.08 | 135.46 | 135.84 | 136.22 | 136.6 | 136.98 | 137.36 | 137.74 | 138.12 |
100 | 138.5 | 138.88 | 139.26 | 139.64 | 140.02 | 140.39 | 140.77 | 141.15 | 141.53 | 141.91 |
110 | 142.29 | 142.66 | 143.04 | 143.42 | 143.8 | 144.17 | 144.55 | 144.93 | 145.31 | 145.68 |
120 | 146.06 | 146.44 | 146.81 | 147.19 | 147.57 | 147.94 | 148.32 | 148.7 | 149.07 | 149.45 |
130 | 149.82 | 150.2 | 150.57 | 150.95 | 151.33 | 151.7 | 152.08 | 152.45 | 152.83 | 153.2 |
140 | 153.58 | 153.95 | 154.32 | 154.7 | 155.07 | 155.45 | 155.82 | 156.19 | 156.57 | 156.94 |
150 | 157.31 | 157.69 | 158.06 | 158.43 | 158.81 | 159.18 | 159.55 | 159.93 | 160.3 | 160.67 |
160 | 161.04 | 161.42 | 161.79 | 162.16 | 162.53 | 162.9 | 163.27 | 163.65 | 164.02 | 164.39 |
170 | 164.76 | 165.13 | 165.5 | 165.87 | 166.14 | 166.61 | 166.98 | 167.35 | 167.72 | 168.09 |
180 | 168.46 | 168.83 | 169.2 | 169.57 | 169.94 | 170.31 | 170.68 | 171.05 | 171.42 | 171.79 |
190 | 172.16 | 172.53 | 172.9 | 173.26 | 173.63 | 174 | 174.37 | 174.74 | 175.1 | 175.47 |
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