Operating The Pump - Varian Turbo-V 250 969-9504 Bedienungshandbuch

•
When the last digit is entered, the display shows:
D E L A Y E V E N
T H R E S H O L D :
where: XXX = YES or NO.
•
Press the CYCLE NUMBER pushbutton and select
YES or NO.
If YES is selected, R2 energizes from the start of
the turbopump and deenergizes after the run-up
time when the pump rotational speed becomes
lower than the programmed threshold value.
If NO is selected, R2 energizes from the start of the
yutbopump and, after the rotational speed of the
pump exceeds for the first time the speed threshold
value, R2 deenergizes once the pump speed
becomes lower than the programmed speed
threshold value (see the preceding cycle diagram).
This function is factory-set to YES.
D E L A Y E V E N
T H R E S H O L D :
•
Press PUMP CURRENT to confirm; the display
shows:
C O N T R O L L E R
W H E N R 2
where: XXX = YES or NO.
If YES is selected when R2 deenergizes the
controller, and the interconnecting devices are
automatically switched off.
This function is factory set to YES.
A F T E R
X X X
A F T E R
Y E S
O F F
O F F
•
Press PUMP CURRENT to confirm, and the display
shows:
P U M P L
R E S E T ?
where:
•
PUMP LIFE = is the elapsed operating time range
000 to 99999 hours.
•
RESET XXX = YES or NO.
The controller is factory-set to NO.
•
If YES is selected, the pump life shall be reset to 000.
After selecting YES, press the PUMP CURRENT push-
button to enter the command and the display shows:
S O F T S T A R T
[
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When PUMP LIFE is reset to 000, the CYCLE number
is also reset to 000.

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. Than
the Turbo-V pump is slowed down in proportion to the
gas load at
3 KRPM.
Even if any previous display selection was made.
This will occur either in NORMAL operation or with the
LOW SPEED selected.
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.
58
TECHNICAL INFORMATION
I F E X X X X X h
X X X
O N
]
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NOTE
least until it
87-900-856-01 (B)
reaches