In the development of the precision constant-current source, in order to ensure the stability of the high-power sampling resistors and rapid heat dissipation, need to make it into a flat structure and placed in oil bath. When constant temperature oil bath is working in different cases, the stability and uniformity of the temperature are different. The stability of the temperature in different working conditions is mainly analyzed, the theoretical analysis result is verified by experimental method. Finally, the best result is given.%在精密恒流源的研制中,为了保证大功率采样电阻的快速散热和阻值稳定性,需要把它做成平板结构并放入恒温油槽中.恒温油槽在空载运行和有试样放入及试样放置位置和方向不同的情况下,工作区内温度的稳定性和均匀度是不同的.主要分析恒温槽在不同工作状态下工作区温度的稳定性,通过实验方法验证理论分析的结果,最后确定恒温槽内平板电阻的最佳放置方式.
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