● Place the sample that needs to be frozen directly into the hole of the program cooling box,cover it and then place the program cooling box in a clean freezing environment at-80℃forat least 3 hours,during which time it cannot be opened.After the cooling is completed,the sample can be taken out and transferred to the liquid nitrogen container.
● lf continuous use is required,open the upper and lower covers of the product in a normal'temperature environment and restore it to normal temperature before reuse.
