D
Warning
Check
ventilation
Please make sure to ventilate the room when using liquid
nitrogen.
The nitrogen can potentially reduce the oxygen in the
room.
This may cause an oxygen deficiency accident.
Caution
Wear gloves
When using liquid nitrogen, wear gloves to protect your
hands.
If liquid nitrogen splashes and adheres to your skin, you may feel
acute pain momentary.
Confirm
complete close
After confirming complete closure of the main valve, let out
the air in the bell jar.
If air comes into the oil diffusion pump during operation, it deteriorates
the oil and lowers the performance.
Operation failure of the three-way valve may occur.
An inflow of air during liquid nitrogen injection will cause condensable
gases to adhere to the trap excessively, thus degrading the
performance.
Operations
