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本文简述了这种仪器测损耗的基本原理和公式,討論了由标准样品和被試样品的损耗不同所引起的误差,列举了冶轧鋼和热轧钢的試驗数据,并与絕对法做了比较。指出,如果被試样品的损耗大于标准样品的损耗时,用此法获得的损耗值偏低;反之則偏高。本文又提出了一种改作电阻箱的方案,这可以使测量中不必考虑瓦特表的内阻,使操作大大简化。
In this paper, the basic principles and formulas of measuring loss for this instrument are briefly introduced. The errors caused by the different losses of the standard sample and the tested sample are discussed. The test data of the smelting and hot rolling steel are listed and compared with the absolute method A Pointed out that if the test sample loss greater than the loss of the standard sample, the loss value obtained by this method is low; the other hand, high. This paper also proposed a solution for the resistance box, which makes the measurement without having to consider the internal resistance of the wattmeter, the operation greatly simplified.