Started N2 loop 1/30/0/<60 @ 8:58
Removed USB stick to move data over, and USB error showed up. 
Output graph flatlined
Solenoid valves failed open
Had to reboot computer and restart program running to get valves to close
Need watchdog timer in new circuit to avoid this in the future

Decided to gnd shields to box ground and box ground to earth ground to eliminate (hopefully) spurious jumps in output
Shield on 24 V power and to NI6218 both tied to back plate of Meeco. Door stud (gnd tied with 110 VAC plug to power strip (earth ground)

N2 loop started
Second loop at 13:18
CB10144 (recently filled by Duane for O2 Secondary) loaded and vented x 4
Start loop @ 14:05
2nd loop @ 14:51
N2 loop @ 16:40