补偿导线特点EX-HBRP电缆质量

主要用于某些特殊场合的测量。标准化热电偶我国从1988年1月1日起，热电偶和热电阻全部按IEC标准生产，并S、B、E、K、R、J、T七种标准化热电偶为我国统一设计型热电偶。
热电偶的结构形式为了保证热电偶可靠、稳定地工作，对它的结构要求如下：
①组成热电偶的两个热电极的焊接必须牢固；
②两个热电极彼此之间应很好地绝缘，以防短路；
③补偿导线与热电偶自由端的连接要方便可靠；
④保护套管应能保证热电极与有害介质充分隔离。
3．热电偶冷端的温度补偿由于热电偶的材料一般都比较贵重（特别是采用贵金属时），而测温点到仪表的距离都很远，为了节省热电偶材料，降低成本，通常采用补偿导线把热电偶的冷端（自由端）延伸到温度比较稳定的控制室内，连接到仪表端子上。必须指出，热电偶补偿导线的作用只起延伸热电极，使热电偶的冷端移动到控制室的仪表端子上，它本身并不能消除冷端温度变化对测温的影响，不起补偿作用。因此，还需采用其他修正方法来补偿冷端温度t0≠0℃时对测温的影响。在使用热电偶补偿导线时必须注意型号相配，极性不能接错，补偿导线与热电偶连接端的温度不能超过100℃。热电阻热电阻是中低温区zui常用的一种温度检测器。它的主要特点是测量精度高，性能稳定。其中铂热是阻的测量精确度是zui高的，它不仅广泛应用于工业测温，而且被制成标准的基准仪。补偿导线特点EX-HBRP电缆质量

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