When using an ultra-low temperature freezer, it is essential to operate it according to the instruction manual. This is to prevent equipment damage and sample deterioration. At the same time, regular maintenance is also crucial to ensure the freezer performs optimally.

How to fully utilize the function of ultra-low temperature refrigerators?

I. Operate in a standardized manner

1. Sample Storage: Wear anti-freeze gloves; limit door opening time to less than 30 seconds; plan the order of sample retrieval to minimize cold air loss; sample volume should be ≤80% of container capacity; pre-cool liquids before placing them in.

2. Temperature Management: Avoid placing too many warm items at once and cool them in batches; do not set the temperature too low.

3. Internal Management: Use freezer racks inside the freezer for categorized storage; place frequently-used samples on the upper shelves.

II. Maintenance and Care

1. Regular Cleaning: For example, clean the filter monthly; clean the condenser every two months; check the temperature sensor for frost every six months.

2. Component Replacement: Replace the vacuum pump oil annually; replace the dryer filter every two years; check the door seal for tightness every quarter.

3. Defrosting Requirements: Defrost naturally after power-off; do not use sharp objects or hot water; use an absorbent cloth to handle any melted water during cleaning.

Low temperature freezer is a type of freezer or storage box that can achieve ultra-low temperature preservation. It is generally used for the preservation of tuna, low-temperature testing of electrical components and special materials, and can also be used to preserve some vaccines, biological samples, reagents, etc.