  We present long slit spectrophotometric emission line fluxes of bright and
extended (<5 arcsec in diameter) Planetary Nebulae (PNe) selected from Acker et
al. 1992 catalog with suitable equitorial coordinates for Northern hemisphere.
In total, 17 PNe have been choosen and observed in 2008--2010. To measure
absolute fluxes, broad slit sizes, ranging from 3.5\arcsec to 7.5\arcsec were
used and thus equivalent widths of all observable emission line fluxes were
also calculated. Among 17 PNe's observed, line flux measurements of 12 of them
were made for the first time. This work also aims to extend the sky coverage of
emission line flux standards in Northern hemisphere (Dopita & Hua 1997 - 52 PNe
in Southern hemisphere; Wright et al. 2005 - 6 PNe in Northern hemisphere).
Electron temperatures and densities, and chemical abundances of these PNe were
also calculated in this work. These data is expected to lead the photometric or
spectrometric further work for absolute emission line flux measurements needed
for \hii regions, supernova remnants etc.
