VENT OBJECTIVES:

1, Fix ETMX sus "jump issue"

2, First Contact clean the arms

3, Install new spare cold cathode and convectron gauges: InstruTech-Hornet

4, Install 50 mm apeture beam baffles

5, Check and clean optical quality viewport from inside

The following bullets were executed:

• Closed shutter of PSL-IR and green shutters at the ends 
• Checked jam nuts are protecting bellows 

• Check crane functionality & cleanliness last week

• Particle count must be under 10,000 counts / cf min for 0.5 micron 
• Checked all metal window covers are on. 
• Check 5 cylinders (24 cft size) of instrument grade air, called Alfa Gas 1 in stock.
• Took pictures of medm screens: sus-sum, aligned oplevs pos, alignment values and vac configuration
• Turned Oplev servos off
• Closed V1 and VM1, opened VM2
• Opened VV1 manual valve to Nitrogen cylinder and let the P1 to rise to 25 Torr
• Switched over to Instrument Grade Air Cylinder and continoed the vent with 8-10 PSI reading at the pressure regulator

We are venting the 40m IFO