Changing from one lorry to another

Hi
Would anyone be able to help me with this question.

I’m new to driving 7.5 tonne.
When changing from one lorry to another and back again,
what is the procedure for using my digi card?

Assuming that you’re taking all the vehicles onto public roads you take your card out of one lorry and put it in the other, if necessary do a manual entry for other work to cover the time the card was out of the tachograph, when you change back to the original vehicle you do the same again.

If you’re asking how to do the manual entries we would need to know what make and type of tachographs you use, by type I mean the software version (it will be type 1 or 2), if you don’t know the type the age of the vehicle should suffice.

Thanks for the reply.
I’m going to use type 1 then 2 and back to 1.
type 1 is set to now time and 2 is set to one hour ahead.