Umshini wokugcoba ithebhulethi (umshini wokufaka ushukela) usetshenziselwa amaphilisi ekhemisi kanye noshukela emboza amaphilisi nezimboni zokudla. Ibuye isetshenziselwe ukugingqa nokushisisa ubhontshisi namantongomane adliwayo noma imbewu.
Umshini wokugcoba ithebhulethi usetshenziswa kakhulu ekwenzeni amaphilisi, amaphilisi ejazi likashukela, ukupholisha nokugoqa ukudla okufunwa imboni yekhemisi, imboni yamakhemikhali, ukudla, izikhungo zocwaningo kanye nezibhedlela. Ingaphinde ikhiqize imithi emisha yezikhungo zocwaningo. Amaphilisi ejazi likashukela aphucuziwe anokubukeka okugqamile. Ijazi eliqinile eliqinile liyakhiwa futhi ukucwebezela kukashukela ongaphezulu kungavimbela i-chip ekuwohlokeni kwe-oxidative futhi kuvale ukunambitheka okungafanele kwe-chip. Ngale ndlela, amaphilisi kulula ukubonwa futhi isisombululo sawo ngaphakathi kwesisu somuntu singancishiswa.