I do not know how it is recored when the test is carried out for the Tachograph in the UK; However over here when the tacho has been newly recalibrated, we get a sticker which is affixed on the door jamb stamped and signed by testing station , we have never been pulled up by any one when they have checked the tachograph and seen this, also that the seals are still in place , I would try appealing against this if I was you .