Pumping down the mirrors and filling with He

1. Check valve states:  He should be shut off at the tank, and the valve closest to the gauge on the KB should be shut
   
2. Connect pump to mirror box
3. Confirm that the valve connecting the vacuum hose to the mirror box is closed (no green visible on valve)
4. Slowly open the valve, watching the gauge on the opposite side of the mirror box.  The vacuum rate should be ~ 1mbar/second
5. Continue to open valve as vacuum is reached (~ 1 x 10^-2)
   
6. Monitor down to 1 mbar on the gauge attached to the mirror box.  Later monitor on the Pfeiffer gauge (upper left, labeled ID23-2 KB.  The pressure for the mirrors is on channel 2.  You might have to turn this Pfeiffer on as, it is usually left off
   
7. Close valve leading to vacuum pump
8. Turn He feed to a high level (~0.4 mbar) near the optics hutch
9. open valve connecting He to the mirror box slowly, allowing the box to come back to atmospheric pressure (or close to it).  This is easier with two people!  ~10 mbar/minute or slower at the beginning.  You can monitor the prssure remotely on soldiersam with the vac.py command:  log into soldiersam and type "python vac.py".  See below if vac.py has been erased for source code
   
10. close valve on mirror box connecting to He line
11. Re vacuum down
    
12. Once vacuum is achieved, close valve to vacuum pump
13. Turn off vacuum pump and let it come up to atmospheric pressure overnight
14. Slowly open valve on mirror box connected to red He line as in step 9
    
15. Adjust flow rate on the He regulator to reduce the flow to the minimum level

vac.py:

import TacoDevice

dev=TacoDevice.TacoDevice("id23/pir/101")

import time

g=0

while True:

    print dev.DevStatus()

    print g

    time.sleep(1)

    g=g+1