Operating The Pump - Varian PTB Turbo V 700 HT 969 9445 Notice D'emploi

N
where: XX = indicates the rotational speed (33 KRPM for high speed,
or 28 KRPM for low speed).

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 (350 W with
water cooling, or 220 W with air cooling).
Than the Turbo-V pump is slowed down in pro- portion to the gas
load at least until it reaches about 4 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.
Turbo-V 700HT Controller User Manual / 87-900-877-01 (F)
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Technical Information
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