热电偶如何校准?求解答

2025-03-14 22:17:19
推荐回答(3个)
回答1:

校验设备:恒温槽、高精度数显表、连接导线(四线制)校验方法:将热电阻插入恒温槽,插入深度一般为300mm左右,将恒温槽温度控制于0度和100度,用导线将数显表和热电阻连接起来,0度和100度测试三次,取平均值,看显示数据,热电阻为PT100、PT20、PT10、PT500、CU50等一系列分度,看0度的显示数据,然后将100度的数据除以0度的数据,得到一个系数。根据这些数据和系数和分度表进行对照,A级:+-0.06欧姆,B级:+-0.12欧姆]

回答2:

最好多校一些点。tj001009(站内联系TA)校准之后,一般的控制器都可以调初始温度ymnh(站内联系TA)使用说明书上有的
我的是 长按 AT键后 进入功能选择魏兵(站内联系TA)热电偶有一个自整定功能,用一段时间整定一会,比较准。切记,整定时的温度要在你常用稳定下。tj001009(站内联系TA)我觉得自整定功能是控制器上的,目的是控制加热速率,防止温冲,与热电偶是否准确无关,不知是否正确tj001009(站内联系TA)有时控制反应器温度的控温仪表显示不准是因为控制器上热电偶型号设错了,比如K型设成E型yuchaoying(站内联系TA)最好还是和标准热电偶或温度计校正,绘出偏差曲线。
自整定不能矫正温度,它是温控参数:加热频率、输出功率等,其参数和环境有关;
有些偏差是室温热偶补偿坏了。yuchaoying(站内联系TA)热电偶型号设错,那就是错误了,不叫偏差,呵呵zhangwengui330(站内联系TA)在控制器上设置好示值偏移值就可以了
一般常用冰水混合物校正或者沸水校正
不过我一般都是用室温示值或者体温校正。(用玻璃温度计参比即可)

回答3:

一般采用比较法,即和标准器进行比较,从而求得其差值可参阅JJG 141-2000 工作用贵金属热电偶检定规程、JJG 351-1996 工作用廉金属热电偶检定规程]

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