What was the exact procedure - what have you done - step by step, what and when was weighed?
1) Weigh crucible = 21.5953g
2) Add copper wire to crucible
3) Weigh crucible + copper wire = 22.0194g
4) Add sulfur (approx .5 - 1.5g) to crucible. This was done by eye, no real measurements needed according to manual.
5) Heat crucible up till everything is black
6) Weigh crucible = 22.1339g
7) Add more sulfur
8.) Heat crucible up till everything is black
9) Weigh crucible = 22.1347g
And from this we need to determine the empirical formula.