Pump Shutdown; Power Failure; Remote Control Mode Operation; Rs 232 Control Mode Operation - Varian Turbo-V 250 969-9423 Bedienungshandbuch

With normal LOW SPEED operation, the pump will run
at about 2/3 of its nominal speed and achieves a base
pressure somewhat
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 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
X X
while approaching the low speed value.
When the low speed mode is deselected, the pump
starts to accelerate to its rotational speed. The display
shows:
N O R M A L
X X

Pump Shutdown

Press the front panel STOP pushbutton or remove the
remote signal; the power from the turbopump will be
removed and the pump will begin to slow down.

Power Failure

In the event of a power failure (momentary or long term), the
Turbo-V controller will stop the turbopump and all the
interconnected pumps/devices. The Turbo-V 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 controller automatically restarts the interconnected
devices and the turbopump in the proper sequence. The
display shows:
P U M P I S
1 2 X X
until normal operation achieved.
higher than the standard
I N G L S
K R P M
O P E R A T I O N
K R P M
S T A R T I
K R P M

Remote Control Mode Operation

If remote signals are used to operate the controller, it
must be programmed for remote operation (see
paragraph
when ready to start, the display shows:
R E A D Y
S O F T
If the Soft Start has been deselected the display shows:
L S
P U M P
R E M O T E
With or
START/STOP
pushbuttons
NUMBER and PUMP CURRENT pushbuttons are
always active.

RS 232 Control Mode Operation

If the RS 232 option is installed and the controller has
been programmed for RS 232 operation, the controller
may be driven by a computer and when ready to
operate, the display shows:
R E A D Y
S O F T
If the Soft Start has been deselected the display shows:
P U M P
R S 2 3 2
With or
N G
START/STOP, LOW SPEED functions are under
computer control, while the CYCLE NUMBER and
PUMP CURRENT front panel pushbuttons are always
active.
69
TECHNICAL INFORMATION
"FRONT/REMOTE/232
F O R R E M O T E
S T A R T
R E A D Y
S T A R T
wihout Soft Start mode
and LOW SPEED
are inoperative, while
F O R R S 2 3 2
S T A R T
R E A D Y
L I N E
wihout Soft Start mode
87-900-852-01 (B)
Selection") and
: U S E
selected the
front panel
the CYCLE
: U S E
selected the