1、PT100 热电阻分度表 圈子类别：现场仪表 (未知) 2009-8-26 13:19:00我要评论 加入收藏 加入圈子 工控朋友大家好！以下是 PT100 热电阻分度表。帮助有需要的朋友，我乐意!PT100 型热电阻分度表ORG 3000H;PT100 R_T TABLT ,-101267cPT100_TABLT:DW 5987,6025,6066,6106,6147,6187,6228,6268,6309,6349,6390,6430 ;-101-90cDW 6470,6511,6551,6591,6631,6672,6712,6752,6792,6833 ;-89 -80cDW 6873
2、,6913,6953,6993,7033,7073,7113,7153,7193,7233 ;-79-70cDW 7273,7313,7353,7393,7433,7473,7513,7553,7593,7633 ;-69-60cDW 7673,7713,7752,7792,7832,7872,7911,7951,7991,8031 ;-59-50cDW 8070,8110,8150,8189,8229,8269,8308,8348,8388,8427 ;-49-40cDW 8467,8506,8546,8585,8625,8664,8704,8743,8783,8822 ;-39-30cDW
3、 8862,8901,8940,8980,9019,9059,9098,9137,9177,9216 ;-29-20cDW 9255,9295,9334,9373,9412,9452,9491,9530,9569,9609 ;-19-10cDW 9648,9687,9726,9765,9804,9844,9883,9922,9961,10000 ;-90cDW 10039,10078,10117,10156,10195,10234,10273,10312,10351,10390 ;110cDW 10429,10468,10507,10546,10585,10624,10663,10702,10
4、740,10779 ;1120cDW 10818,10857,10896,10935,10973,11012,11051,11090,11128,11167 ;2130cDW 11206,11245,11283,11322,11361,11399,11438,11477,11515,11554 ;3140cDW 11593,11631,11670,11708,11747,11785,11824,11862,11901,11940 ;4150cDW 11978,12016,12055,12093,12132,12170,12209,12247,12286,12324 ;5160cDW 12362
5、,12401,12439,12477,12516,12554,12592,12631,12669,12707 ;6170cDW 12745,12784,12822,12860,12898,12937,12975,13013,13051,13089 ;7180cDW 13127,13166,13204,13242,13280,13318,13356,13394,13432,13470 ;8190cDW 13508,13546,13584,13622,13660,13698,13736,13774,13812,13850 ;91100cDW 13888,13926,13964,14002,1403
6、9,14077,14115,14153,14191,14229 ;101110cDW 14266,14304,14342,14380,14417,14455,14493,14531,14568,14606 ;111120cDW 14644,14681,14719,14757,14794,14832,14870,14907,14945,14982 ;121130cDW 15020,15057,15095,15133,15170,15208,15245,15283,15320,15358 ;131140cDW 15395,15432,15470,15507,15545,15582,15629,15
7、657,15694,15731 ;141150cDW 15769,15806,15843,15881,15918,15955,15993,16030,16067,16104 ;151160cDW 16142,16179,16216,16253,16290,16327,16365,16402,16439,16476 ;161170cDW 16513,16550,16587,16624,16661,16698,16735,16772,16809,16846 ;171180cDW 16883,16920,16957,16994,17031,17068,17105,17142,17179,17216
8、;181190cDW 17253,17290,17326,17363,17400,17437,17474,17510,17547,17584 ;191200cDW 17621,17657,17694,17731,17768,17804,17841,17878,17914,17951 ;201210cDW 17988,18024,18061,18097,18134,18171,18207,18244,18280,18317 ;211220cDW 18353,18390,18426,18463,18499,18536,18572,18609,18645,18682 ;221230cDW 18718
9、,18754,18791,18827,18863,18900,18936,18972,19009,19045 ;231240cDW 19081,19118,19154,19190,19226,19263,19299,19335,19371,19407 ;241250cDW 19444,19480,19516,19552,19588,19624,19660,19696,19733,19769 ;251260cDW 19805,19841,19877,19913,19949,19985,20021 ;261267c以上数据可以直接粘贴到你的汇编中。大家有空的话，请关注一下博客中的“CBA8000
10、温湿度控制器”。工控朋友大家好！以下是 T 型热电偶分度表。帮助有需要的朋友，我乐意!T 型热电偶分度表ORG 2000H;T TYPE THERMOCOUPLE NEGTIVE TEMPERATURE;THE DATA IN THE TABLT IS NEGTIVE NUMBERT_TABLT1:DW 0,39,77,116,154,193,231,269,307,345 ;0-9cDW 383,421,458,496,534,571,608,646,683,720 ;-10-19cDW 757,794,830,867,903,940,976,1013,1049,1085 ;-20-29cD
11、W 1121,1157,1192,1228,1263,1299,1334,1370,1405,1440 ;-30-39cDW 1475,1510,1544,1579,1614,1648,1682,1717,1751,1785 ;-40-49cDW 1819,1853,1886,1920,1953,1987,2020,2053,2087,2120 ;-50-59cDW 2152,2185,2218,2250,2283,2315,2348,2380,2412,2444 ;-60-69cDW 2475,2507,2539,2570,2602,2633,2664,2695,2726,2757 ;-70
12、-79cDW 2788,2818,2849,2879,2909,2939,2970,2999,3029,3059 ;-80-89cDW 3089,3118,3147,3177,3206,3235,3264,3293,3321,3350 ;-90-99cDW 3378,3407,3435,3463,3491,3519,3547,3574,3602,3629 ;-100-109cORG 2100H;T TYPE THERMOCOUPLE POSITIVE TEMPERATURE;THE DATA IN THE TABLT IS POSITIVE NUMBERT_TABLT2:DW 0,39,78,
13、117,156,195,234,273,312,351 ;09cDW 391,430,470,510,549,589,629,669,709,749 ;1019cDW 789,830,870,911,951,992,1032,1073,1114,1155 ;2029cDW 1196,1237,1279,1320,1361,1403,1444,1486,1528,1569 ;3039cDW 1611,1653,1695,1738,1780,1822,1865,1907,1950,1992 ;4049cDW 2035,2078,2121,2164,2207,2250,2294,2337,2380,
14、2424 ;5059cDW 2467,2511,2555,2599,2643,2687,2731,2775,2819,2864 ;6069cDW 2908,2953,2997,3042,3087,3131,3176,3221,3266,3312 ;7079cDW 3357,3402,3447,3493,3538,3584,3630,3676,3721,3767 ;8089cDW 3813,3859,3906,3952,3998,4044,4091,4137,4184,4231 ;9099cDW 4277,4324,4371,4418,4465,4512,4559,4607,4654,4701
15、;100109cDW 4749,4796,4844,4891,4939,4987,5035,5083,5131,5179 ;110119cDW 5227,5275,5324,5372,5420,5469,5517,5566,5615,5663 ;120129cDW 5712,5761,5810,5859,5908,5957,6007,6056,6105,6155 ;130139cDW 6204,6254,6303,6353,6403,6452,6502,6552,6602,6652 ;140149cDW 6702,6753,6803,6853,6903,6954,7004,7055,7106,
16、7156 ;150159cDW 7207,7258,7309,7360,7411,7462,7513,7564,7615,7666 ;160169cDW 7718,7769,7821,7872,7924,7975,8027,8079,8131,8183 ;170179cDW 8235,8287,8339,8391,8443,8495,8548,8600,8652,8705 ;180189cDW 8757,8810,8863,8915,8968,9021,9074,9127,9180,9233 ;190199cDW 9286,9339,9392,9446,9499,9553,9606,9659,
17、9713,9767 ;200209cDW 9820,9874,9928,9982,10036,10090,10144,10198,10252,10306 ;210219cDW 10360,10414,10469,10523,10578,10632,10687,10741,10796,10851 ;220229cDW 10905,10960,11015,11070,11125,11180,11235,11290,11345,11401 ;230239cDW 11456,11511,11566,11622,11677,11733,11788,11844,11900,11956 ;240249cDW
18、 12011,12067,12123,12179,12235,12291,12347,12403,12459,12515 ;250259cDW 12572,12628,12684,12741,12797,12854,12910,12967,13024,13080 ;260269cDW 13137,13194,13251,13307,13364,13421,13478,13535,13592,13650 ;270279cDW 13707,13764,13821,13879,13936,13993,14051,14108,14166,14223 ;280289cDW 14281,14339,143
19、96,14454,14512,14570,14628,14686,14744,14802 ;290299cDW 14860,14918,14976,15034,15092,15151,15209,15267,15326,15384 ;300309cDW 15443,15501,15560,15619,15677,15736,15795,15853,15912,15971 ;310319cDW 16030,16089,16148,16207,16266,16325,16384,16444,16503,16562 ;320329cDW 16621,16681,16470,16800,16859,1
20、6919,16978,17038,17097,17157 ;330339cDW 17217,17277,17336,17396,17456,17516,17576,17636,17696,17756 ;340349cDW 17816,17877,17937,17997,18057,18118,18178,18238,18299,18359 ;350359cDW 18420,18480,18541,18602,18662,18723,18784,18845,18905,18966 ;360369cDW 19027,19088,19149,19210,19271,19332,19393,19455
21、,19516,19577 ;370379cDW 19638,19699,19761,19822,19883,19945,20006,20068,20129,20191 ;380389cDW 20252,20314,20376,20437,20499,20560,20622,20684,20746,20807 ;390399cDW 20869 ;400c以上数据可以直接粘贴到你的汇编中。大家有空的话，请关注一下博客中的“CBA8000 温湿度控制器”。工控朋友大家好！以下是 K 型热电偶分度表。帮助有需要的朋友，我乐意!K 型热电偶分度表ORG 1000H;K TYPE THERMOCOUPLE
22、 NEGTIVE TEMPERATURE;THE DATA IN THE TABLT IS NEGTIVE NUMBERK_TABLT1:DW 0, 39, 79, 118, 157, 197, 236, 275, 314, 353 ;0-9cDW 392, 431, 469, 508, 547, 585, 624, 662, 701, 739 ;-10-19cDW 777, 816, 854, 892, 930, 968, 1005, 1043, 1081, 1118 ;-20-29cDW 1156, 1193, 1231, 1268, 1305, 1342, 1379, 1416, 145
23、3, 1490 ;-30-39cDW 1527, 1563, 1600, 1636, 1673, 1709, 1745, 1781, 1817, 1853 ;-40-49cDW 1889, 1925, 1961, 1996, 2032, 2067, 2102, 2137, 2173, 2208 ;-50-59cDW 2243, 2277, 2312, 2347, 2381, 2416, 2450, 2484, 2518, 2552 ;-60-69cDW 2586, 2620, 2654, 2687, 2721, 2754, 2788, 2821, 2854, 2887 ;-70-79cDW 2
24、920, 2953, 2985, 3018, 3050, 3082, 3115, 3147, 3179, 3211 ;-80-89cDW 3242, 3274, 3305, 3337, 3368, 3399, 3430, 3461, 3492, 3523 ;-90-99cDW 3553, 3584, 3614, 3644, 3674, 3704, 3734, 3764, 3793, 3823 ;-100-109cORG 1100H;K TYPE THERMOCOUPLE POSITIVE TEMPERATURE;THE DATA IN THE TABLT IS POSITIVE NUMBERK
25、_TABLT2:DW 0, 39, 79, 119, 158, 198, 238, 277, 317, 357 ;09cDW 397, 437, 477, 517, 557, 597, 637, 677, 718, 758 ;1019cDW 798, 838, 879, 919, 960, 1000, 1041, 1081, 1122, 1162 ;2029cDW 1203, 1244, 1285, 1325, 1366, 1407, 1448, 1489, 1529, 1570 ;3039cDW 1611, 1652, 1693, 1734, 1776, 1817, 1858, 1899,
26、1940, 1981 ;4049cDW 2022, 2064, 2105, 2146, 2188, 2229, 2270, 2312, 2353, 2394 ;5059cDW 2436, 2477, 2519, 2560, 2601, 2643, 2684, 2726, 2767, 2809 ;6069cDW 2850, 2892, 2933, 2975, 3016, 3058, 3100, 3141, 3183, 3224 ;7079cDW 3266, 3307, 3349, 3390, 3432, 3473, 3515, 3556, 3598, 3639 ;8089cDW 3681, 37
27、22, 3764, 3805, 3847, 3888, 3930, 3971, 4012, 4054 ;9099cDW 4095, 4137, 4178, 4219, 4261, 4302, 4343, 4384, 4426, 4467 ;100109cDW 4508, 4549, 4590, 4632, 4673, 4714, 4755, 4796, 4837, 4878 ;110119cDW 4919, 4960, 5001, 5042, 5083, 5124, 5164, 5205, 5246, 5287 ;120129cDW 5327, 5368, 5409, 5450, 5490,
28、5531, 5571, 5612, 5652, 5693 ;130139cDW 5733, 5774, 5814, 5855, 5895, 5936, 5976, 6016, 6057, 6097 ;140149cDW 6137, 6177, 6218, 6258, 6298, 6338, 6378, 6419, 6459, 6499 ;150159cDW 6539, 6579, 6619, 6659, 6699, 6739, 6779, 6819, 6859, 6899 ;160169cDW 6939, 6979, 7019, 7059, 7099, 7139, 7179, 7219, 72
29、59, 7299 ;170179cDW 7338, 7378, 7418, 7458, 7498, 7538, 7578, 7618, 7658, 7697 ;180189cDW 7737, 7777, 7817, 7857, 7897, 7937, 7977, 8017, 8057, 8097 ;190199cDW 8137, 8177, 8216, 8256, 8296, 8336, 8376, 8416, 8456, 8497 ;200209cDW 8537, 8577, 8617, 8657, 8697, 8737, 8777, 8817, 8857, 8898 ;210219cDW
30、8938, 8978, 9018, 9058, 9099, 9139, 9179, 9220, 9260, 9300 ;220229cDW 9341, 9381, 9421, 9462, 9502, 9543, 9583, 9624, 9664, 9705 ;230239cDW 9745, 9786, 9826, 9867, 9907, 9948, 9989, 10029, 10070, 10111 ;240249cDW 10151, 10192, 10233, 10274, 10315, 10355, 10396, 10437, 10478, 10519 ;250259cDW 10560,
31、10600, 10641, 10682, 10723, 10764, 10805, 10846, 10887, 10928 ;260269cDW 10969, 11010, 11051, 11093, 11134, 11175, 11216, 11257, 11298, 11339 ;270279cDW 11381, 11422, 11463, 11504, 11546, 11587, 11628, 11669, 11711, 11752 ;280289cDW 11793, 11835, 11876, 11918, 11959, 12000, 12042, 12083, 12125, 1216
32、6 ;290299cDW 12207, 12249, 12290, 12332, 12373, 12415, 12456, 12498, 12539, 12581 ;300309cDW 12623, 12664, 12706, 12747, 12789, 12831, 12872, 12914, 12955, 12997 ;310319cDW 13039, 13080, 13122, 13164, 13205, 13247, 13289, 13331, 13372, 13414 ;320329cDW 13456, 13497, 13539, 13581, 13623, 13665, 13706
33、, 13748, 13790, 13832 ;330339cDW 13874, 13915, 13957, 13999, 14041, 14083, 14125, 14167, 14208, 14250 ;340349cDW 14292, 14334, 14376, 14418, 14460, 14502, 14544, 14586, 14628, 14670 ;350359cDW 14712, 14754, 14796, 14838, 14880, 14922, 14964, 15006, 15048, 15090 ;360369cDW 15132, 15174, 15216, 15258,
34、 15300, 15342, 15384, 15426, 15468, 15510 ;370379cDW 15552, 15594, 15636, 15679, 15721, 15763, 15805, 15847, 15889, 15931 ;380389cDW 15974, 16016, 16058, 16100, 16142, 16184, 16227, 16269, 16311, 16353 ;390399cDW 16395, 16438, 16480, 16522, 16564, 16607, 16649, 16691, 16733, 16776 ;400409c以上数据可以直接粘贴
35、到你的汇编中。大家有空的话，请关注一下博客中的“CBA8000 温湿度控制器”。精确度达 0.1的温度测量模块设计时应注意事项 圈子类别：传感器 (未知) 2009-8-27 9:04:00我要评论 加入收藏 加入圈子 PT100 电阻测温仪工作原理及误差分析温度测量要取得很高的精确度，必须具有一个独特的电路设计。测量原理简化图如下参考电阻一般采用精密电阻，越精密越好，至少千分子 0.5 且稳定性好。因为 SPRT(PT100)与参考电阻串联在电路中，通过它们的电流相等，所以在它们身上产生的电压与电阻成正比。只要知道各自的电压及参考电阻的电阻值，就可以算出 PT100 的电阻值。算式为：PT1
36、00 的阻值 / 参考电阻阻值 = PT100 所产生 AD 值 / 参考电阻所产生 AD 值两者 AD 值通过测量得知，参考电阻值已知，PT100 的阻值就可以计算出来。再通过中央处理器进行查表得出温度值。原理很简单，但要取得很高的精确度，还有很多地方需要注意。归纳一下主要有以下几个方面。1. 引线电阻使用 PT100 传感器测量时可能会受到连接导线的影响。电阻也存在PT100 的连线及连接器的接头中，在常用的 2 线或 3 线电路中。这些电阻被附加到 PT100 上，就会造成 0.1 度至 1 度的误差。要取得很高的精确度，必须使用 4 线 PT100.我们再来看一下下面的原理图使用 4
37、线 PT100，电路图如上，它可以完全消除导线电阻的影响，在这种电路（通常称为 Kelvin 电路）中，传感器被来自一组导线的电流所驱动，所得到的电动势用另外一组感测。信号被输入到一个具有很高输入阻抗的放大器中，在经过放大器的用来感测的这个回路中，处于“虚断” 状态，没有电流，自然也不会产生电压降。那么放大器两端的电压反应的是真正 PT100 的电压，而 2 线 PT100, 放大器两端的电压实际上是 PT100 及 2 条导线上的电压；3 线PT100, 放大器两端的电压实际上是 PT100 及 1 条导线上的电压，请对照原理图细细体会。2. 杂散热电势PT100 测量时，会有几个不同金属导
38、线间的接头。它们的行为就像热电偶，可以产生被称为热电动势的微小电压。除非以某种方式得到抑制，否则就会影响测量的精确度要抑制这种电动势，得采用如下的技术进行二次测量，在第二次测量时，使电流源的方向相反。热电动势在两次测量中造成的误差是相同的。将两次测量的相减，即可消除热电动势。这样要得到一个温度值，需要进行 4 次测量。但是这种方法抑制热电动势及自加热问题是非常有效的。3. 电抗测量速度与准确度是有一定的矛盾的，因为要使用开关测量 4 次，过快的转换必然产生电抗，所以在每次测量之前，必须留出充足的延时让电流，电压稳定。如果必要，可以进一步增加延时。测量每个电压样本值需要 0.5 秒（0.25 秒
39、用来开关转换及稳压，0.25 秒用来测量及发送到中央处理器。由于需要 4 个样本点，整个测量下来需要 2 秒有些厂家往往号称每秒可以测多少多少通道，我在怀疑他的精确度，当然这也不能说什么，可能他要求的是速度，精确度要求没这么高。4. 泄漏PT100 对导线及感测元件周围绝缘材料的电漏泄非常敏感。泄漏在较高温度或较低温度较为显著，因为低温时，绝缘层会从周围吸收湿气，高温时，绝缘材料的电导有会相对较高。因此测量时，还要注意周围的环境温度，尽量保持常温和稳定。5. 自热效应自热效应来源与通过驱动电流耗散到传感器中的功率。它会造成温度偏高，这就要求驱动电流保持一个最小化得电流。同时上面采用二次测量的方
40、法也可以大大改善。6. 元件漂移元件漂移主要因为元件老化，不合理的 PCB 布板也有一定的影响。影响测温的主要漂移有：驱动电流的漂移、放大器的偏置电流、放大器偏移电压。放大器增益、ADC 偏移、参考电压偏移。参考电阻偏移。要求布板合理，元件尽量采用国际上质量可靠的 IC，尽量采用集成度高的 IC，被免分立元件。7. 噪声和分辨率任何电路中都会存在电噪声，它是不可被免。过量噪声在测量中随时间以随机变化形式出现，这样就不能检测被测参数的微小真实变化。噪声限制了测量仪器的有效分辨率。在电路设计时，要求电源非常稳定，层层滤波。模拟电路与数字电路完成隔离，一点共地等等。布线都有一定的讲究（一言难尽）。A
41、D 选用高分辨率，至少 16 位（如 AD7705）。甚至 24 位。也可以在后期采用数字滤波，但采用数字滤波，仪器对被测量的温度会反应迟缓一些。8. 非线性度在其他所有的误差来源得到控制后，剩下的就只有非线性度了。PT100 线性度比较好，但如果要精确到 0.1 度，用全程线性处理的话，还是会产生一定的误差，用公式法同样会产生一定的误差。在此先用查表法精确小数点前面的度数，小数点后面的数再线性化处理。根据电阻查表：首先确定小数点前面的度数，再把小数点后面的数在 1 度范围内线性化 100 份，使测量的数据分辨率达到 0.01 度，这样处理的结果在线性化的过程中可以精确到 0.1 度以上。整个
42、测量处理的方框图如下通过对以上 8 个方面处理，我公司所生产的 AD 测温模块精确度达到了 0.1 度。分辨率 0.01 度。温度范围（-80 度至 170 度）校验仪器采用美国 FLUKE 的测温仪器 1502A.大家有空的话，请关注一下博客中的“CBA8000 温湿度控制器(触摸屏、intel 远程测量、控制、记录)”。CBA8000 温湿度控制器中包含了此模块的具体运用Pt100（RTD）热电阻分度表()0 1 2 3 4 5 6 7 8 9温度 电阻值（）-200 18.52-190-180-170-160-15022.8327.1031.3435.5439.7222.4026.673
43、0.9135.1239.3121.9726.2430.4934.7038.8921.5425.8230.0734.2838.4721.1125.3929.6433.8638.0520.6824.9729.2233.4437.6420.2524.5428.8033.0237.2219.8224.1128.3732.6036.8019.3823.6827.9532.1836.3818.9523.2527.5231.7635.96-140-130-120-110-10043.8848.0052.1156.1960.2643.4647.5951.7055.7959.8543.0547.1851.295
44、5.3859.4442.6346.7750.8854.9759.0442.2246.3650.4754.5658.6341.8045.9450.0654.1558.2341.3945.5349.6553.7557.8240.9745.1249.2453.3457.4140.5644.7048.8352.9357.0140.1444.2948.4252.5256.60-90-80-70-60-5064.3068.3372.3376.3380.3163.9067.9271.9375.9379.9163.4967.5271.5375.5379.5163.0967.1271.1375.1379.116
45、2.6866.7270.7374.7378.7262.2866.3170.3374.3378.3261.8865.9169.9373.9377.9261.4765.5169.5373.5377.5261.0765.1169.1373.1377.1260.6664.7068.7372.7376.73-40-30-20-10084.2788.2292.1696.09100.0083.8787.8391.7795.6999.6183.4887.4391.3795.3099.2283.0887.0490.9894.9198.8382.6986.6490.5994.5298.4482.2986.2590
46、.1994.1298.0481.8985.8589.8093.7397.6581.5085.4689.4093.3497.2681.1085.0689.0192.9596.8780.7084.6788.6292.5596.48010203040100.00103.90107.79111.67115.54100.39104.29108.18112.06115.93100.78104.68108.57112.45116.31101.17105.07108.96112.83116.70101.56105.46109.35113.22117.08101.95105.85109.73113.61117.
47、47102.34106.24110.12114.00117.86102.73106.63110.51114.38118.24103.12107.02110.90114.77118.63103.51107.40111.29115.15119.015060708090 119.40123.24127.08130.90134.71119.78123.63127.46131.28135.09120.17124.01127.84131.66135.47120.55124.39128.22132.04135.85120.94124.78128.61132.42136.23121.32125.16128.99132.80136.61121.71125.54129.37133.18136.99122.09125.93129.75133.57137.37122.47126.31130.13133.95137.75122.86126.69130.52134.33138.13100110120130140138.51142.29146.07149.83153.58138.88142.67146.44150.21153.96139.26143.05146.82150.58154.33139.64143.43147.20150.96154.71140.02
