The scale of energies for DOS?

[BandTheory]

I am looking at the density of states for a CNT in a two probe system. All the calculations are going fine, but I was wondering what range of energies to look at.  I just looked at +/- 7eV around the zero energy level. Is there some range that is generally considered to be adequate ?

Thanks.

[Nordland]

Yes that should be just fine. I would perhaps limit it to -3 to 3 - or perhaps -5 to 5 in order to save time.

[BandTheory]

Excellent, thank you.