If you are in the middle of entering data and wish to continue, then you have to log in to portal in another browser window.
After that you can close that window and click on the Check for ongoing session in the warning message that appeared.
If the warning disapears you have successfully extended your session.
If you are not entering data or wish to log in to the portal in the same window, without preserving your work, click here.
If you wish to finish using the portal, click here.
