  The chemically peculiar (CP) stars of the upper main sequence are excellent
astrophysical laboratories for investigating the diffusion, mass loss,
rotational mixing, and pulsation in the presence and absence of a stable local
magnetic field. For this, we need a homogeneous set of parameters, such as
effective temperature and surface gravity, to locate the stars in the
Hertzsprung-Russell diagram so that we can then estimate the mass, radius, and
age. In recent years, the results of several automatic pipelines have been
published; these use various techniques and data sets, including effective
temperature and surface gravity values for millions of stars. Because CP stars
are known to have flux anomalies, these astrophysical parameters must be tested
for their reliability and usefulness. If the outcome is positive, these can be
used to analyse the new and faint CP stars published recently. I compared
published effective temperature and surface gravity values of a set of CP
stars, which are mostly based on high-resolution spectroscopy, with values from
four automatic pipeline approaches. In doing so, I searched for possible
correlations and offsets. I present a detailed statistical analysis of a
comparison between the `standard' and published effective temperature and
surface gravity values. The accuracy depends on the presence of a magnetic
field and the spectral type of the CP subgroups. However, I obtain standard
deviations of between 2% and 20%. Considering the statistical errors, the
astrophysical parameters from the literature can be used for CP stars, although
caution is advised for magnetic CP stars.
