Currently, the interval is hardcoded in the javascript of the kiosk.

https://github.com/f-klubben/stregsystemet/blob/46d63d6e872b7e40779735d9c4e72707047658e1/kiosk/templates/kiosk.html#L72C5-L72C5

Hacktober: the kiosk is a separate system from the Stregsystem, but the admin panel is shared.