Ulvac EMP-20W, Инструкция по эксплуатации

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10 ULVAC CRYOGENICS INCORPORATED
2.3 Inside view of EMP-20W front door and lower panel (Figure 2-3)
Liquid nitrogen dewar :Stores liquid nitrogen (Maximum 80 litters).
Cold head (S050) :The cold head works in conjunction with the
compressor to generate ultra-low temperature and
liquefy nitrogen. The cold head needs maintenance
services according to the time in operation.
Pressure gauge :Displays the pressure inside the dewar.
He PRESSUREMETER :Displays the pressure of Helium gas filled in UW404.
When suspended: 1.85 – 1.95 MPa
When in operation: 2.10 – 2.30 MPa
He Gas charge port :This port is inside the front panel of UW404.
Connect the charging hose to this port to charge
Helium gas. Do not touch this port except when
needed.
He Gas charge valve :Used when charging Helium gas. Do not touch the
valve except when needed, as touching it may result in
Helium leakage.
START/STOP switch :This button lights in green when UW404 is in
operation. This does not work to turn on and off
UW404 as it is remotely controlled in this
configuration.
RESET button :This button lights in red when UW404 is suspended
with some fault. Use this button to reset the
abnormal state.
POWER light This lights in red when UW404 is turned on.
Hour meter :Displays the total operation time of UW404. Use
this information to conduct maintenance work
properly.
2.4 EMP-20W Electrical circuit
（
Figure 2-4
）
Circuit breaker :This is a protective breaker for control circuit of
EMP-20W. It is tripped when an electric leak or
short-circuit occurs.
Fuse :There are protective fuses (F-1, 2: 3A) for AC circuit
and protective fuses (F3: 2A) for DC circuit.