Are you sure you have the 3-phase sketch? You cannot sensibly use the 3-phase sketch in an emonPi, as it has only 2 current inputs. In any case, that line does not appear in the 3-phase sketch. The nominal calibration coefficient for the emonTx with the ‘shop’ a.c. adapter (Ideal Power 77DA-10-09 (US Plug type)) is 130 here.