Vacuum Pump Procedures

Starting point

Gate valve open, pumps running, and chamber under vacuum.

ON

ON

OPEN

10-5 Torr

10-5 Torr

Log into vacuum pump webserver

On a computer on the KPF private network, open a web browser and go to 192.168.23.125.

At top right of page, log in using the kpfdev account credentials.

Remain on the ‘Main’ page.

ON

ON

OPEN

10-5 Torr

10-5 Torr

Find PDU and Outlet for gate valve power supply

On the same computer, open another web browser tab/window and go to the PDU Outlet Registry.

Find the gate valve on this page and note:

• the IP address of the PDU it is plugged into, and

• which outlet on the PDU it is plugged in to.

ON

ON

OPEN

10-5 Torr

10-5 Torr

Log into PDU webserver

On same computer, open another web browser tab/window and go to the IP address for the gate valve PDU.

Log in using the kpfdev account credentials.

Navigate to the ‘Outlet’ page shown in hierarchy at top left of screen.

ON

ON

OPEN

10-5 Torr

10-5 Torr

Close gate valve

On the PDU webserver, turn off power to the appropriate outlet for the gate valve. This closes the gate valve.

ON

ON

CLOSED

Starts to fall towards 10-8 Torr

Starts to rise

Turn off turbo pump

Now go back to the webserver page for the vacuum pump.

Turn off the vacuum pump using the red ‘STOP' button at bottom center of page.

Note pump will not instantaneously stop, but the pump frequency will slowly start to drop. The user has no control here, this process is internally regulated by the pump.

Note it might take 1.5 hours for it to gracefully slow from 1000 Hz to 0 Hz.

ON

OFF

CLOSED

Once pump frequency slows down below 500 Hz the pressure will start to rise.

Rising

Ending point

The turbo has stopped rotating and is showing a frequency of 0 Hz, and a power of 0 W.

Roots pump is still running, and has reached a steady pressure of 1.5 x 10-2 Torr.

ON

OFF

CLOSED

1.5 x 10-2 Torr

Rising