經過一年多的研究,上海工業試驗所最近已將第一隻電子型連續自動平衡電位計的樣機完全試製成功。除了四隻真空管外,全部都是自行設計製造。主要的零件如同期震動器、高倍率輸入變壓器、兩相平衡小馬達、標準電池等的製造上的問題也都一一解决。 這一架儀器的刻度在試車時是按鉑銠熱電偶特性而標定的。其滿刻度的行程時間已達4 1/2秒, After more than a year of research, Shanghai Industrial Testing Institute has recently completed the prototype trial of the first electronic continuous self-balancing potentiometer. In addition to four vacuum tubes, all are designed and manufactured. Major parts such as the same period vibrator, high-rate input transformers, two-phase balanced small motors, standard batteries and other manufacturing problems are also solved one by one. The scale of this instrument is calibrated for platinum rhodium thermocouple characteristics during commissioning. Its full scale travel time has reached 4 1/2 seconds,