Ulvac UMP-40W, Instruction Manual

Page: 14 / 52

8 ULVAC CRYOGENICS INCORPORATED
ON ON
L1 L2 L3 PE
ELB MC1 PWS PLC A/D1 A/D2
CP1 RL1 CP2 A11 A12
Electromagnetic contactor
Gas flow rate sensor
Liquid level indicator
2-Circuit protectors
3-Sequencers
Terminal blocks
Terminal blocks
DC Power supply
Earth bar
(Power supply connection)
Terminal blocks
Circuit breaker
Figure 4-3 Electrical circuit
Inside view of UMP-40W front door and lower panel ( Figure 4-2 )
Liquid nitrogen dewar : Container that stores liquid nitrogen up to 100 litters.
Cold head (RMS150T) :The cold head works in conjunction with the compressor to
generate ultra-low temperature and produce liquid nitrogen.
The cold head needs maintenance services according to the
time in operation.
Pressure gauge :Displays the pressure inside the dewar.
He Pressure Meter :Displays the pressure of Helium gas filled in C30PMVRT.
When suspended: 1.26 – 1.34 MPa
When in operation: 1.70 – 2.20 MPa
He gas charge fitting :This port is inside the front panel of C30PMVRT. Connect
the charging hose to this port to charge Helium gas. Do not
touch this port except when needed, as it may result in helium
leakage.