为了更有效地、灵活地使用动圈仪表,常常需要扩展其量程。常用的方法是,在表头及温度补偿回路参数不变的情况下,改变测量回路中串联电阻R_串,以达到扩展量程的目的。这种方法是按量程扩展前后流过动圈满 In order to more effectively and flexibly use dynamic instruments, often need to expand its range. The common method is to change the series resistance R_ string in the measurement loop under the condition of the constant head and temperature compensation loop parameters to achieve the purpose of expanding the range. This method is based on range expansion before and after the flow of moving full