Notes. The models in the top part (MA1 and MA2) are particularly useful for studying the line emission of the atomic species (the FS lines). Since molecular line emission is too low to be relevant in these two low-density models, higher density models are also considered (M1 to M4). All these models are identical to the reference models from Paper I and Meijerink & Spaans (2005). M1 and M2 correspond to low-density clouds in starbursting galaxy centres, whereas M3 and M4 correspond to much denser clouds where excitation of high density gas tracers such as HCN are possible. These models are also shown in our template grid in Fig. 1.