Power Failure; Operating The Pump - Agilent Technologies Turbo-V 2000 ICE Bedienungshandbuch

17 Technical Information
Use

Power Failure

In the event of a power failure (momentary or long term), the Turbo-
V ICE controller will stop the turbopump and all the interconnected
pumps/devices. The Turbo-V ICE vent valve device, if used, will vent
the turbopump only if the power failure is longer than the preset
delay time. When power is restored, the Turbo-V ICE controller
automatically restarts the interconnected devices and the turbopump
in the proper sequence.
Figure 34

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.
Then the Turbo-V ICE pump is slowed down in pro- portion to the gas
load at least until it reaches 3 KRPM.
250/260
Cycle diagram
Turbo-V 2000 ICE Controller User Manual / 87-900-929-01 (L)