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热处理車間的电爐一般采用—17型电子温度记录控制仪来控制温度。但这种仪表采用原来的接线方法,在使用当中,由于其他情况(保险絲断或其他电气线路断綫等)造成电源故障时,仪表本身停止了正常工作,而仪表內单独供电的接点調节机构的接点往往仍然閉合,以致于使中間电磁启动繼电器和强电流电磁繼电器仍然接通,电炉电阻絲繼續加热,无論爐温达到多高程度;从仪表上都很难控制和发現,因而造成电炉超温,一时注意
Heat treatment workshop electric furnace -17 type electronic temperature record controller to control the temperature. However, this instrument uses the original wiring method, in use, due to other circumstances (fuse broken or other electrical line disconnection, etc.) caused by power failure, the instrument itself to stop working properly, and the instrument individually powered contact adjustment The contacts of the mechanism are often still closed, so that the middle of the electromagnetic relay and high current electromagnetic relay is still connected, the electric resistance wire continues to heat, no matter how high the furnace temperature; are difficult to control and found from the instrument , Resulting in over-temperature electric furnace, temporary attention