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箱式电炉常配用电子电位差计 ,原线路如图 1所示。在生产中经常会出现这种现象 :在电炉通电时 ,仪表的温度指示骤然偏低一数值 (有时偏低几百度 ) ,但在电炉断电后 ,仪表温度指针又回升 ,反应出真实炉温。此故障因为现象较隐蔽 ,一般不易被察觉 ,但却极易造成产品大量报废 ,危
Box-type electric furnace often with electronic potentiometer, the original line shown in Figure 1. This phenomenon often occurs in production: when the electric furnace is energized, the temperature of the instrument suddenly drops below a certain value (sometimes a few hundred degrees lower), but after the electric furnace is powered off, the instrument temperature pointer rises again, reflecting the true furnace temperature . This fault because the phenomenon is more subtle, generally not easily detected, but it can easily lead to a large number of scrapped products, dangerous