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在普通的恒温器中加以下列二改进,可以减小由于调节器迴差及加热器热量起伏所引起之时滞,提高精密度达10倍以上。在室温20—30℃,槽温40℃可维持柏克曼温度计(估计0.002℃)读数不变(±0.001℃以上)。改进:(1)由电动搅拌器使调节器(汞膨胀式)产生振动,可以减小汞柱迴差。 (2)在替续器之加热开关上并联电阻,使有一定功率经常加热,可以减小热量起伏。
In the ordinary thermostat to be the following two improvements, can reduce the hysteresis caused by the regulator backlash and heater heat fluctuations, improve the precision of more than 10 times. At room temperature 20-30 ℃, the bath temperature 40 ℃ can maintain the Berkman thermometer (estimated 0.002 ℃) readings unchanged (± 0.001 ℃ above). Improvements: (1) The vibration of the regulator (mercury expansion) by the electric mixer can reduce the hysteresis of mercury. (2) in parallel to the heater switch on the parallel resistance, so that there is a certain amount of regular heating, can reduce the heat fluctuations.