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最近,上海电工仪器厂根据广大计量部门的要求,研制了“81—1型标准电池恒温箱”,外型见封底照片。标准电池恒温箱由二个同心金属盒及二套控温系统组成,在内外盒间及外盒各有一个加热器及温度调节器,这样,在10℃～28℃环境温度下,恒温箱控制温度接近+30℃,箱内电池温度变化小于±0.005℃。该恒温箱选用精密温度计和晶体管开关电路控制温度,不另需任何设备即可监视电池的温度。结构上还装有自动超温保护装置,使用方便,安全可靠。
Recently, Shanghai Electrical Instrument Factory based on the requirements of the majority of the measurement department, developed a “81-1 standard battery incubator,” see photos at the end of the back cover. Standard battery incubator consists of two concentric metal boxes and two sets of temperature control system, inside and outside the box and the box have a heater and thermostat, so that at 10 ℃ ~ 28 ℃ ambient temperature, thermostat control Temperature close to +30 ℃, the battery temperature within the box less than ± 0.005 ℃. The incubator use precision thermistor and transistor switching circuit temperature control, without any additional equipment to monitor the battery temperature. Structure also equipped with automatic over-temperature protection device, easy to use, safe and reliable.