JAMSC-B2902
JAMSC-B2902
JAMSC-B2902
在电测指示仪表俭定中，阻尼时间是仪表性能的主要技术指标。所渭阻尼时问，就是指当仪表接/’被测量之后.其可动部分从开始转动到称定在偏转位置所需要的时间。
仪表阻尼时间的方法依仪表标度尺形式而定。不同标度尺形式的仪表，其阻尼时间方法各有所不同.现分别介绍如下。
(1)对于具有机械力矩或磁反作用力矩的单向标度尺 (如图1中a所示)的仪表，如C21、D26、T24型仪表，其阻尼时间是接人被测量后，指针从始点偏转至标度尺几何中心的时间.
(2)对于具有机械力矩或磁反作用力矩的双向对称标度尺(图1中b所示)的仪表。如C27型携带式直流电表，其阻尼时间是断开相当于标度尺大值的被测量之后，指针自然回到零点的时间。
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