Agilent Technologies 969-9462, User Manual

Page: 296 / 306

17
Technical Information
Use
With normal LOW SPEED operation, the pump will run at the
frequency set in ADJUST and achieves a base pressure somewhat
higher than the standard specifications. If the gas load becomes
higher, the controller output frequency and voltage start to decrease
automatically, and the Turbo-V pump is slowed down in proportion
to the gas load until it reaches about 3 KRPM.
If the LOW SPEED mode is selected after normal operating condition
is reached, the display shows:
A P P R O A C H I N G L S
X X K R P M L S
while approaching the low speed value.
When the low speed mode is deselected the pump starts to accelerate
to its rotational speed. When this is reached, the display shows:
N O R M A L O P E R A T I O N
X X K R P M
Pump Shutdown
Press the front panel STOP push-button or remove the remote signal;
the power from the turbopump will be removed and the pump will
begin to slow down.
296/306 Turbo-V 2000HT Controller User Manual / 87-900-913-01 (O )