To check and stream Impedances or EEG-data to LSL use the LSLapp.exe in eegoApps\ALLinONEapp.
Follow the instructions in eegoApps\ALLinONEapp\README_guide to install the requirements to run LSLapp.exe.
Use Labrecorder.exe to record and write data to an .xdf file. Click the Update Button to refresh the streams and see your amp and all your other devices which are linked to LSL, check the box if you want have the data in the .xdf file. Then select your Storage Location and name your file. Click Start when you are ready to record. Stop when your done.