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本文叙述一个单层高环路增益自动控制恒温器,用来保存标准电池,以满足核磁共振法测定γ′_P和用超导约瑟夫逊效应测定2e/h的试验中电压单位传递的需要,并准备用于实现我国标准电池的巡回比对和检定。其温度稳定系数为50μ℃/℃(实测值),半年温度变化<1m℃。整机重量15公斤。内附24伏、3安时蓄电池,交直流供电自动切换;环境温度20℃时,脱离市电可连续供电48小时以上。均湿区间为φ110×110,可放置6个标准电池。其垂直方向温差<20μ℃,水平温差更小。
This article describes a single-layer, high-loop-gain, autocontrol thermostat that holds standard cells to meet the need for NMR transmission for the measurement of γ’_P and for the 2e / h test with the superconducting Josephson effect Preparation for the realization of China’s standard battery tour than the alignment and verification. The temperature stability coefficient of 50μ ℃ / ℃ (measured value), six months temperature change <1m ℃. Machine weight 15 kg. Containing 24 V, 3 Ah battery, AC and DC power supply automatically switches; ambient temperature 20 ℃, from the mains for 48 hours of continuous power supply. Are wet section for the φ110 × 110, can be placed six standard batteries. The vertical temperature difference <20μ ℃, the temperature difference is smaller.