Just push it in.
When it says 'manual correction?' change it to 'No' and press OK
(No one understands how to do manual corrections. If you try you'll get baffled)
When you withdraw it it will say '24h day' and for some strange reason this means do you want a printout. Select No and press OK.
Glad i seen this thread , i got my digi card , work just sent me out in a wagon with one , no instructions what to do , i somehow bluffed my way through it , i've seen 2 different sorts of digital tacho machines so that really confused me !!
I'm not much help to the question , sorry , but i can relate to it.