遥控遥测电离计是用单片机控制的真空计［１］的应用之一，在有放射性的空间，观察 者离现场有时有２５０ｍ的距离，传统的方法是用长电缆线将规管与控制单元连起来［２］ 其缺点是大的灯丝电流要求很粗的电缆线，长的屏蔽线使放大器的时间常数增大．用单 片机控制的真空计可将压强数值用单片机进行传送．２５０ｍ的距离只用很细的电缆线即 可完成遥控遥测任务． Remote telemetry ionization meter is a one-chip computer-controlled vacuum gauge [1] application, in a radioactive space, the observer sometimes away from the scene with a distance of 250m, the traditional method is to use the long cable to the regulatory and control unit The disadvantage [2] is that a large filament current requires a very thick cable, and a long shield leads to an increase in the time constant of the amplifier. The vacuum gauge controlled by the single chip microcomputer can transmit the pressure value with the single chip microcomputer. 250m distance using only a very thin cable to complete remote telemetry tasks.