Chandra had to run some errands on the way to work but is on her way.  

As found this morning, the GN2 flow into CP3 via the sensing line hookup had increased overnight from > 2 LPM to > 5 LPM this morning (0950 hrs. local).  The GN2 bottle still had 1200 psi this morning and the regulator output (when adjusted for near zero flow) was still as left, i.e., 25 psi.  ->   I valved-in the parallel connected magnahelic diff. pressure gauge and it was in good agreement with the pressure transducer used by CDS.  I manually filled CP3 via CDS by changing the LLCV %open from 20% to 50%.  The exhaust thermocouples responded in 1 1/2 minutes or so.  Thinking that the 2 LPM contribution from the GN2 may have caused the T/Cs to respond prematurely, I went outside and opened the LLCM bypass valve 1/2 turn and observed LN2 at the exhaust after a minute or so.  So, CP3 is full.  I experimented by increasing the regulator output to 40 psi and increasing the GN2 flow to >> 5 LPM (5 LPM is max on this flow meter).  

I am leaving the setup at 40 psi regulator output, 3 LPM flow and the magnehelic gauge valved-out.