Comparison between the chemical abundances and U values introduced as inputs for the models (x-axis) with the estimations from HCM-IR when all lines plus [S III]λ33 μm are used (y-axis). For all plots we present Seyferts as blue circles and LINERs as green squares. The offsets are given using the median value (dashed line) and RMSE (dot-dashed lines). Bottom plots show the residuals from the offset and their distribution in a histogram (bottom-right plot).