Ulvac UMP-40W, Instruction Manual

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ULVAC CRYOGENICS INCORPORATED 31
Operation
Checks prior to operation
Check the following items before starting the operation.
(1) The power source of the UMP-40W and GN-30i are connected correctly.
(2) The air inlet and outlet opening of GN-30i is cleared.
(3) Cooling water hose is connected correctly between UMP-40W and cooling water supply.
(4) The nitrogen gas tube is connected correctly between UMP-40W and the nitrogen generators.
(5) The touchscreen of UMP-40W is turned OFF (lights off).
(6) The main power source of UMP-40W and GN-30i are ON.
(7) Nitrogen generator remote cables are properly connected between UMP-40W and the
nitrogen generator.
Operation preparation
Start nitrogen gas supply with GN-30i
(1) Press RUN/STOP and GN ON/OFF of UMP-40W touchscreen (not of GN-30i) to start up
GN-30i. When it starts operation normally, the GN ON/OFF on UMP-40W touchscreen
flashes of 1 second each.
Note: Once operation starts, RUN/STOP switch does not work for the following 6
minutes. If you wish to stop, press the emergency stop button of the UMP-40W.
(2) Nitrogen gas is started to be supplied 6 minutes later than the start-up of the GN-30i.
Check that the GN2 monitor indicates the N
2
gas flow rate of 26-30 L/min. When shifted,
please refer to the operation manual of GN-30i and adjust the flow rate by control valve.
When it starts operation normally, the GN ON/OFF on UMP-40W operation display
flashes of 0.5 second each
Start-up
(1) When nitrogen gas is supplied to UMP-40W, C30PMVRT starts up and starts to liquefy
nitrogen.
If liquefaction does not start and the ALARM lights up, refer to alarm menu of
touchscreen in the Chapter 9.
(2) Purity of nitrogen in the dewar must be improved at the time of initial start-up.
Since inside of liquid nitrogen dewar is at room temperature at the initial start-up, it is
necessary to take the time to cool inside of the dewar. (It normally requires about half a day.)
Use nitrogen gas with recommended flow rate and pressure. Otherwise, liquid nitrogen
generation may be hindered.
CAUTION