I have checked dE/dx results for the Part 2 (days 127-161)  of Run XIII pp 510 data with calibration constrants obtained in  Part 1 (days 074-126).
(See for reference Part 1 results at  https://drupal.star.bnl.gov/STAR/system/files/RunXIII_pp500p1_dEdx.pdf)

The results are summarize as two plot sets resolution and shift versus Tpc track length for P2 and P1.

The conclusions:
1. The resolution in P2 is increased by 0.1% (P1 :7.45 % => P2: 7.53%).
2. The systematical shift is increased by ~0.6% (P1: 0.11% => P2: 0.77%).
3. The full scale calibration will not give us much.
4. Any way it would be useful to make more checks but I would say that we can declare that 
we already have a resonable dE/dx calibration for Part 2 (days 127-161)  of Run XIII pp 510 data