Braun Berührungsfrei+stirnthermo. M. Age Precision 1 ST

I was ready to package this back up and return it as it simply showed "ERR" on the screen when switched on. After a quick google other people had this issue and all said within 5 minutes then it worked fine with no ongoing issue.... So a couple pf minutes later and it works perfectly with no issues. But weird but would recommend it as its an excellent bit of kit.