1 Use this chip decoder ,you not need to remove the cartridges to reset it.
It can reset the chip automatically.
2 You can refill the ink into the cartridges directly,not need to take out it from the printer.
For use with following printer models.
HP Designjet 5100
HP Designjet 5500/
HP Designjet 5000PS
HP Designjet 1050
HP Designjet 1055