ULVAC CRYOGENICS INCORPORATED
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9. Manual Dispense of Liquid Nitrogen
9.1 Connecting liquid nitrogen supply port
Connect the joint (coupler joint) of attached flexible hose to LN
2
supply port
located at the front of MP-300K. When connecting to the coupler joint, do so while
pushing down the outer ring part of the MP-300K side.
9.2 Dispense liquid nitrogen
To manually dispense liquid nitrogen, insert the head end of flexible hose in liquid
nitrogen dewar, and keep pressing the MANUAL START buttons for 3 seconds.
With the above steps, the MANUAL START buttons are lit in green, and liquid
nitrogen flows out of head end of flexible hose or pipe.
The dispense operation stops automatically 10 minutes later from the start-up of
supply. The MANUAL START flickers 30 seconds in advance of the automatic
termination. When more liquid nitrogen is needed, press MANUAL START buttons
again to extend the operation for another 10 minutes. Press MANUAL STOP
buttons to stop dispending.
LN
2
production stops during the manual dispense operation.
When nitrogen-gas supply stops, liquid nitrogen cannot be dispensed.
When AUTO READY is pressed and MP-300K is waiting for automatic
supply, the amount of LN2 that can be dispensed manually is limited to
25%. Manual desipense cannot be performed while automatically
supplied. Manual dispense should be started after the automatic
supply is completed.
CAUTION
Never leave the place while manually dispensing liquid nitrogen. Keep the place well
ventilated for prevention of lack of oxygen.
・
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 at the lowest temperature right after dispensing.
WARNING
