15
4. Operations
4.1. Before Switching ON
Sections 4.1. to 4.3. refer only to operating the pump in its
condition on delivery, without the DCU operating unit. The
bridges ”venting release”, ”motor, TMP ON” and ”pumping
station ON” are fitted in the remote control plug.
Turbopump rotors rotate at high speed. When
the high vacuum flange is open there is a
danger of injury and of damage to the pump
caused by objects falling into the pump.
Therefore never operate the pump with open
high vacuum flange.
Take care when pumping hazardous gases and
observe the safety precautions of the gas manu-
facturer.
➡
With sealing gas: Open the sealing gas supply.
➡
With water cooling: Open cooling water supply and check
flow.
➡
With connecting cable 8a (see Section 11. Accessories)
connect the TC 600 and Power Supply TPS 300 on X2
(please see Section 3.8.).
Please note:
The following pre-settings have been programmed:
– Running up time
8 min
– Rotation speed switchpoint
80%
– Automatic venting
50%
These settings can only be altered via Serial Interface RS 485
(DCU, HPU or PC); please refer to the respective operating
instructions.
CAUTION
WARNING
Rear panel, TPS 300
S1 ON/OFF switch
X1 Mains connection
X2 Connection TC 600
F1
Fuse
F2
Fuse
F1
F2
S1
X1
X2
4.2. Switching ON
➡
Switch on the turbopump with switch S1 on the power
supply.
– With air cooling the cooling fan is also switched on via
Electronic Drive Unit TC 600.
– Once the self test has been successfully completed on the
TC 600 (duration approximately 15 seconds), both the
turbopump and the backing pump (if connected) begin
operating.
4.3. Switching OFF And Venting
Before coming to rest after switching off, the turbopump must
be vented in order to prevent contamination.
➡
Close the fore-vacuum.
➡
Switch off both turbopump and backing pump with switch
S1 on the power supply.
➡
Venting
There are three possibilities to vent turbopump:
–
Manual venting
with the use of the venting screw
(status on delivery).
–
Venting with the venting valve
which is selectable
via the remote control (please see Section 4.7.), or via
the DCU or HPU (see respective operating instructions).
–
Venting in two stages
when the vacuum chamber
should be vented as quickly as possible. First stage:
venting with a pressure increase rate of 15 mbar/s for
20 seconds.
Second stage: venting with an optionally large venting
valve.
The valve cross-section for a venting rate of 15 mbar/s
must be compatible with the size of the vacuum chamber.
Where small vacuum chambers are involved, the
Pfeiffer Vacuum Venting Valve TVF 005 can be used for
first stage venting.
➡
Shut off water supply.
