Ulvac EMP-20W, Instruction Manual

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ULVAC CRYOGENICS INCORPORATED 27
9. Dispense Liquid Nitrogen Manually
・
When dispensing liquid nitrogen, make sure to keep the room well
ventilated in order to prevent oxygen shortage.
・
Never attempt to seal liquid nitrogen.
・
When dispensing liquid nitrogen, be sure to put on protective fittings such
as leather gloves. Also, use caution with handling liquid nitrogen supply
flexible hose as it is in extremely low temperature right after dispensing.
WARNING
9.1 Connecting liquid nitrogen supply flexible hose
Connect the joint (coupler joint) of attached flexible hose to LN2 manual dispense port
located at the front of EMP-20W. When connecting to the coupler joint, do so while
pushing the outer ring part of the EMP-20W side.
9.2 Supply of liquid nitrogen
To manually dispense liquid nitrogen, insert the head end of flexible hose in your liquid
nitrogen container, and press-and-hold the MANUAL START button for 3 seconds. With
the above steps, liquid nitrogen flows out of head end of flexible hose.
The dispense operation stops automatically in 10 minutes from the start of supply. The
MANUAL START button flickers 30 seconds in advance of the automatic termination.
When more liquid nitrogen is needed, press MANUAL START button again to extend the
operation for another 10 minutes. Press MANUAL STOP button to stop dispensing.
CAUTION
Never leave the place while manually dispensing liquid nitrogen. Keep the place
well ventilated for prevention of lack of oxygen.
— Liquefynig operation stops during the manual dispense operation.
— When nitrogen-gas supply stops, liquid nitrogen cannot be supplied.
— When the automatic supply is selected (when the AUTO READY is turned on),
manual dispense is limited to 25%. Also, you cannot manually dispense liquid
nitrogen while automatic transfer is taking place. Manual dispense can be started
after the automatic transfer finishes.