run-13 commissioning:
01/18/2013 14:15 start 1500ccm (MTD-only) from existing (not full) bottle
01/22/2013 09:15 flow decreased to 750ccm
01/25/2013 16:15 flow stopped 
02/04/2013 15:15 start 2350ccm (TOF 1600, MTD 750), MTD flow direction reversed
02/06/2013 12:15 increase to 2850ccm (TOF 1600, MTD 1250)
02/07/2013 16:15 still at 2850ccm (but now TOF 1900, MTD 950)
02/08/2013 11:15 decreased to 1250 ccm (TOF 750ccm, MTD 500ccm)
02/13/2013 09:15 increased to 2000 ccm (TOF 1250ccm, MTD 750ccm)
02/17/2013 00:45 flow stopped