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在检修动圈仪表时,无法调整磁分流片的方法将表头灵敏度调到所需范围时,就需要调整量程电阻。通常用电阻箱替代法调整。本文介绍一种无需用电阻箱就可以将仪表调整好的简便方法。其具体步骤如下:将仪表指针调到满度,测出此时示值为 M_1(设仪表示值为 M_0);将外接电阻除去,再次将仪表调到满度,其示值为 M_2,则量程电阻的调整量为:
In the maintenance of moving coil instrument, can not adjust the method of magnetic shunt table sensitivity will be transferred to the desired range, you need to adjust the range of resistance. Usually resistance box alternative method of adjustment. This article describes a simple way to tune the instrument without the need for a resistance box. The specific steps are as follows: the instrument pointer is adjusted to fullness, measured at this time showed that the value of M_1 (set the instrument indicates the value of M_0); the external resistor is removed, the instrument again to full scale, which shows the value of M_2, then The adjustment of the range resistance is: