It begins to refrigerate when the temperature in the milk jar is higher than the temperature upper limit , and stops refrigerating when the temperature is below temperature lower limit ：当奶罐内温度高于“温度上限”时，开始制冷，一直到温度降到低于“温度下限”时停止制冷。
How to set the upper limit temperature and the lower limit temperature ? press the select key to make the light of temperature upper limit light , the nixietube shows the upper limit temperature , press the key 按“选择”键使“温度上限”灯亮，数码显示器上显示上限温度，用上或下键改变设定值“
To insure more densification but deformation of glass beads , the green density should be increased , and the burnout temperature of binder should be below the toplimit of transformation temperature 为保证绝缘子获得较高致密度而不变形，应尽量提高生坯密度，温度同时排蜡应低于该种玻璃的转变温度上限。
