XC系列测温仪表,由于采用张丝支承和晶体管控制线路,比老式的轴承、电子管结构的仪表,具有结构简单、灵敏度高和易于维修等特点,因而大量用于工业生产中。下面谈一谈我们检修该类仪表的一点体会。 (一)測量系统 1.示值偏差的调修在实际工作中,对于XC系列测温仪发生的示值偏差,一般都是采用图1中R_s电阻和磁分路片的调整来解决。但有时因永久磁铁的严重失磁(如永久磁铁有气孔和沙眼或使用中因某些原因引起永久磁铁的磁感应强度减弱)而引起偏转力矩减小,致使指针示值偏低。此时,调整磁分路片已不起作用。若调整R_s,则必须调整一个很小值才能满足要求,这样做比较困难。因此,我们在实际工作中,往往采取稍微 XC series thermometer, due to the use of wire support and transistor control circuit than older bearings, tube structure of the instrument, with a simple, high sensitivity and easy maintenance features, which are widely used in industrial production. Here to talk about our maintenance of this instrument a little experience. (A) of the measuring system 1. Indication Deviation Adjustment In actual work, for the XC series thermometer indication error occurs, are generally used in Figure 1 R_s resistance and magnetic shunt adjustment to solve. But sometimes the permanent magnet due to a serious loss of magnetism (such as the permanent magnet stomata and trachoma or in use due to some reasons caused by the magnetic induction of the permanent magnet weakening) caused by the reduction of the yaw moment, resulting in low indicator shows. At this point, adjust the magnetic shunt has no effect. If you adjust R_s, you must adjust a small value to meet the requirements, this is more difficult. Therefore, we often take a little while in actual work