Operating the Pump
After the starting period, if the system has a vacuum leak or the
pressure in the pump chamber is high (from 1 mbar to atmosphere),
the pump continues to operate indefinitely. If the gas load at the
turbopump inlet flange continues to stay high, the power drawn by
the turbopump increases up to the maximum value (325 W with
water cooling, or 221 W with air cooling).
Then the Turbo-V ICE pump is slowed down in pro- portion to the gas
load at least until it reaches about 4 or 3 KRPM. As soon as the gas
load decreases, the pump will automatically accelerate to reach
normal operation. The pump can be stopped at any rotational speed
and can be restarted at any rotational speed from either the front
panel buttons or the remote connections. The controller
automatically synchronizes the output to the rotational speed of the
pump and then accelerates linearly up to the nominal speed or
within steps if the Soft Start has been selected.
The display shows:
P
1
until normal operation achieved.
Remote Control Mode Operation
If remote signals are used to operate the controller, it must be
programmed for remote operation (see paragraph "Operating
parameter selections") and when ready to start, the display shows:
R
S
If the Soft Start has been deselected the display shows:
P
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