Log entry time 15:55:19 on October 27, 2008

Entry number 244954

Followups:

• 244979 10/27/08 17:21 brads BB Cerenkov Purge/Fill rate is roughly 5 lbs/hour
• 244984 10/27/08 17:31 brads C4F8O bottle qinitial weight was 227 lbs, not 237 lbs
• 245015 10/28/08 00:15 brads BB Cerenkov on slow purge overnight
• 245111 10/28/08 10:43 brads Increased flow and pressure trip point for BB Cerenkov
• 245154 10/28/08 14:47 brads BB Cerenkov is full

- Put the C4F8O bottle up on the scale (initial reading 237 lbs).

- Attached to the regulator and checked for leaks using Snoop.

- Installed 13X molecular sieve (Labclear RK-400 material) to filter for water and other impurities.

- Note: The bottle pressure is very low and doesn't register on the high pressure gauge. Max pressure observed on the low pressure side when outflow valve shut was 10--15psi.

- Tank is ~1800 liters so a single volume swap will require about 40 lbs of gas (1 kg ~= 100 liters STP). This could take ~8 hours at the current estimated flow rate (want to see 200lbs on the scale). I'll check on the mass flow rate in a couple of hours...