3.2. Field tests
Results obtained in the first field tests on the trip from Frankfurt
to Vitoria are represented in Fig. 6. The peaks obtained can be correlated
with the following travel events: section A of Fig. 6 illustrates
the room temperature at the offices of the Perishable
Centre in Frankfurt Airport, where the tags were written and activated.
After that, the polystyrene boxes were taken inside the cold
storage rooms of the Perishable Centre, which has a controlled
temperature between 2 and 3 C. This temperature decrease was