EXFO FTB-2 - Manual (Page 117)

Setting Up Your FTB-2 and FTB-2 Pro
FTB-2 and FTB-2 Pro 107
Configuring the Power Management Options
7. If you want to delete the power plan, tap Delete this plan, and then
confirm the deletion.
8. Close the window.
The changes are taken into account immediately.