You may see the van at night, between 11 pm and 5 am, in any of five parts of Espoo. Leppävaara-Perkkaa will be examined first, then Näkinkylä-Blominmäki-Mikkelä, then Otaniemi-Tapiola, the fourth area is Eestinmalmi-Eestinlaakso, and the final area is Karakallio.
The device in the van identifies electric fields and determines whether there are any faults in the electricity network. If any are found, a mark will be made on the ground, and Caruna will investigate the root cause. The results of the study will also be used to draw up the network refurbishment programme and improve the network's energy efficiency.