This morning we investigated the issue. We found that the two channels were swapped at the level of the Napoli box ENV-DT located in DAQ room, so we swapped them back.

Presently:

• ENV_DLAB_TE associates to the temperature probe is located on the cable tray above EDB bench, and next to the one used by the air conditioner controller (named HVAC_DLAB_TE); see picture
• ENV_SDB2_TE associates to the temperature probe located in proximity of  SDB2 vacuum tank (but not in real termal contact, and in a very precarious placing, that has to be improved): see picture