国产 X_Q~D D 型多点平衡电桥无切换显示装置,各被测点的区分通常是依靠记录墨水的颜色来分辨的。但是由于打印字头较小,各种颜色间互相混淆,以致实际使用中不容易实现各点的区分,给操作人员带来一定的麻烦。另外这类仪表标尺长度短,电机力矩小,很难通过改进机械传动结构的方式,实现类似一般大型自动平衡记录仪那样的小窗 Domestic X_Q ~ D D multi-point balance bridge without switching display device, the measured points are usually distinguished by the color of the recording ink to distinguish. However, due to the print prefix is ​​small, the various colors confused with each other, so that the actual use is not easy to achieve the distinction between the various points to the operator to bring some trouble. In addition such instrument ruler length is short, the motor torque is small, it is difficult to improve the mechanical transmission structure, similar to the general large automatic balance recorder that small window