Power failure procedure: molecular beam setup US 4.1

This walkthrough will help you to re-start the pumps in the molecular beam instrument at US4.

Normal pressures:

When power is out

1. In case of a power outage contact Sjors at +31 6 23848434 or Sander at +31618875389 The setup should be filled with nitrogen

2. If power is back up, the backing pumps should be running and the setup should be pre-pumped

3. Check the MEMB pressure

4. if MEMB pressure is several mbar, you can turn on the turbo pumps

5. first turn on the big turbopump using the on/off button on the top right controller (DCU 600)

6. then turn on the other turbo pumps using the two bottom controllers:

The pfeiffer pump (bottom left) can be turned on by simply pushing the on/off button

The edwards pump (bottom right) can be turned on by menu button (three stripes) several times until there is an alomst empty menu.

Then press the cycle button, then move the cursor down using the arrow buttons to 'turbo' and finally pressing the cycle button again.