14:24 AO2O2 jumps up (down abs) during LS cal, 14:31 And then jumps back down (up abs) during LT(I believe) cal. Slopey cals in between trending down in O2, then back up afterwards. Lots of slope to cals, except for WT and LS for the most part. 15:08 Big spike at takeoff, but system appears to have recovered well. 15:26 A reminder to anyone reading these notes that the MED_PSA, MEDSTAT2 MEDCO2, MEDH2O variables are periodically stopping reporting to the datasystem. No indication that MEDSTAT2 isn't reporting to display on Pump Box, and the fact that the DSM, rather than MEDUSA needs to be cycled to fix the problem suggests the A-D board in the DSM is to blame. Keeping an eye on this, since the signals still appear to fall out occasionally, as they did during leak check this morning. Also, a reminder, that John Cowan decided it best not to replace the A-D card, but to update the firmware, ("reflash"). He did this at about 3PM MDT on 15 Aug 2011, the maint day before RF03. 15:45:00-46:00 MEDUSA Breath test at inlet. Possible signal about 1.5 mins later... will redo. 15:55:30-56:30 AO2 inlet leak check breath test. Nothing apparent. Very stable signals in CO2 and O2 16:09:00-10:00 MEDUSA Breath test again. No obvious leak. 16:18:00 Noting WT Slope, SP Slope, Slope diff when cal jumps as it has a couple of times now. 16:28:45 -10.4 9.0 19.1 16:24:40-16:35:18 MED box 2 signals die and then come back online. 16:35:57-16:36:38 MED box 2 signals die and then come back online. 17:40 Conclusion, after looking at signals on AEROS at ADS rack is that the Analog card is definitely at fault, and should be replaced. 17:45:00-46:00 AO2 inlet Breath test 2. Strong signal of CO2 enrichment, O2 depletion about 1 minute later is suspicious, but shows up in MEDUSA CO2 also, so likely to be a real signal, or at least an artifact of the 18:04:00 While about to try another breath test to confirm previous, I Noted that NOAA ozone bulkhead nut could be loosened by hand. Now too late for breath test, since cal is starting. 18:13:43-57 MEDUSA MEDPSA etc. signals fall out in AEROS again. 20:18 Anne released bag of BC at cabin vent. Didn't see a BC signal corresponding on SP2