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动圈式仪表的测量机构实际上是一个磁电式毫伏计表头,在同一测量机构上,配置不同测量电路就可以配接不同的测量元件,实现不同参数的测量。当配用热电偶测量元件时,输入信号是毫伏信号,配用热电阻测量元件时,采用不平衡电桥电路将电阻变化信号转换成毫伏信号,与动圈测量机构相配。因此,在现有的动圈显示仪表中,加装一切换开关就可以用来既能配热电偶测量毫伏信号,又能配热电阻测量电阻信号,从而达到一表两用的目的。提高了仪表利用率,减少了维护量,节约了资金,给实际应用带
Dynamic measuring instrument measuring mechanism is actually a millivolt millivoltmeter header, in the same measuring mechanism, the configuration of different measurement circuits can be equipped with different measuring elements, to achieve different parameters of the measurement. When equipped with thermocouple measurement components, the input signal is a millivolt signal, with thermal resistance measuring components, the use of unbalanced bridge circuit resistance change signal is converted to millivolt signals, and dynamic measuring institutions match. Therefore, in the existing dynamic display instrument, the installation of a change-over switch can be used not only with thermocouple measurement of millivolt signal, but also with a resistance measurement of thermal resistance signal, so as to achieve a dual purpose. Improve the utilization of instruments, reducing the amount of maintenance, saving money, to the practical application of band