The start procedure for a new fuel cell membrane electrode assembly MEA may vary somewhat from application to application. What is important in any research or production environment is to be consistent with break in procedure that can be used. How the MEA is initially P(psig) N(%) MPD (mW.cm -2 ) i(mA.cm -2 ) at 0.8V i(mA.cm -2 ) at 0.5V i(mA.cm -2 ) at 0.3V R(mΩ) at 0.5V