Trying to calibrate AO2 PACAB operationally to cabin pressure. Alt: 40Kft PACAB: 644 torr Mean sea level pressure = 3800 m equivalent Differential P in-ou t= 10.06 psi = 520.1 torr PSXC = 187.7 hPa = 142.7 torr Expected cabin P from aircraft sensors = 142.7 torr + 520.1 torr = 662 torr. Present PACAB offset at 662 torr = -18 torr 16:45:00-16:46:00 AO2 inlet breath test, saved 110614_AO2_breathtest1_45_4615.png 17:28:30 AO2 brief (~5 secs) large spike in AO2CO2 to about 434ppm, as seen in TF02, and previous campaigns. 19:45ish AO2 comp and AEROS crash. Restart AEROS, but not able to connect. Try to VNC AO2 without luck. 19:55 Disconnect, reconnect ethernet cable to back of rack laptop. Nothing 19:58 Disconnect, reconnect ethernet cable to back of rack laptop. Worked 20:28:50 Spike in AO2CO2 up to 510 ppm 20:29:25 Spikes in AO2CO2 down to 345 ppm 20:35:00-20:36:00 AO2 inlet breath test, saved 110614_AO2_breathtest2_35_36.png 20:38:00-20:39:00 MEDUSA Inlet breath test, saved 110614_RF01_MEDbreathtest38_39.png