The nELBE Online Logbook is of the PSI ELOG Type. The software is running on the server elog.fzd.de. To open the logbook you have to connect to the server using a web browser of your choice and opening the address: https://elog.hzde.de/nELBE/. Now you can login as ntofdaq using the usual password. (Note: Sometimes you have to type the login information twice.)
A detailed user's guide can be found at the PSI ELOG Home Page.