There are many materials in the laboratory that need to be stored at low temperature, such as electronic components, biological materials, vaccines, reagents, etc., so ultra-low temperature freezers are widely used in various laboratories.
Use of medical ultra-low temperature freezer
1. If it is a newly purchased ultra-low temperature freezer, it must be left for 24 hours before it can be powered on.
2. Do not put any items in the freezer after power-on, first lower the temperature in the freezer in stages. First drop to -40°C, then drop to -60°C after normal start and shutdown, and finally drop to -80°C after 8 hours of normal start and shutdown, and then observe for 24 hours. If there is no problem with normal start and shutdown, then the items can be stored in it.
3. After confirming the normal performance of the freezer, you can store items. Generally, if store items at -60°C, the amount should not exceed 1/3 of the capacity. If the temperature of the stored items exceeds -60°C, adjust the set temperature of the freezer to about 3°C higher than the temperature of the item. For example, if the item to be stored is -20°C, then adjust the set temperature of the freezer to -23°C.
4. Do not put too many hot items into the freezer at one time, which may cause the compressor to fail for a long time without stopping. When storing items, put them in batches, and cool down in stages until the required temperature is reached.
Laboratory ultra-low temperature refrigerators generally include -40°C, -60°C, -86°C, -120°C, -136°C, etc., and there are some extreme cryogenic freezers below -150°C. It has a wide range of applications in different fields now.
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