Fujitsu PA03586-B205 Operator's Manual page 339

By the following procedure, you can check how many sheets have been scanned using the
consumables.
1.
Select [Check consumable supplies] from the Right-Click Menu.
⇒
The [ScanSnap Manager - Check consumable status] dialog box appears.
2.
Check how many times consumables have been used.
⇒
Replace consumables referring to [Target value to change supplies] as a rough
guideline.
Part Numbers and Replacement Cycle of Consumables
339