Dynex Router Static IP Setup

I am trying to get a customer up and running online. We are using a NUUO surveillance DVR and a Dynex router. I would like to create a static route (reserve an IP address) for the NUUO PC. I basically need this PC to obtain the same IP address in case of power outages so we don’t have to go back in the router and modify the IP address of the port forwarding every time there is a power outage. Does anyone have any experience with setting up static internal IP addreses using Dynex routers?