ULVAC CRYOGENICS INCORPORATED
1
Safety Instructions
To this unit, voltage that would cause electrocution or serious injuries is applied. It is
extremely dangerous to touch the live part inside the unit. Make sure to turn OFF the
main power source before performing installation, maintenance or repair. Contacting
the internal parts that are not insulated may damage human body or equipments such
as electrical shock.
Connect the earth wire to D type grounding.
Nitrogen gas itself is not toxic to human bodies but it reduces the oxygen
concentration in the atmosphere (the oxygen concentration of 18% or below is defined
as an oxygen-depleted state). Choose a well-ventilated and good-air-circulated
location to install the present unit, or install a ventilator with a capacity of at least 2000
m3/Hr airflow. In addition, do not stay together with a dewar containing liquid nitrogen
in a sealed space, such as an elevator or a car.
The volume of nitrogen gas is 700 times of liquid nitrogen. Confining atmospheric
pressure liquid nitrogen in an airtight space produces high-pressure gas as high as
700 Atm, possibly resulting in explosion. Use liquid nitrogen in the condition constantly
open to air.
1. Danger of electric shock:
Do not touch the live part.
2. Danger of oxygen deficiency:
Ventilate well.
3. Danger of explosion: Do not seal LN
2
.
