437. SOFTWARE UPGRADEA feature implemented in the N43 meters enablesto upgrade fi rmware using a PC with eCon software installed.FreeeConsoftwareandtheupdatefi lesareavailableatwww.lumel.com.pl.UpdatingcanbedonedirectlyviaUSBor RS485 interface using RS485 to USB converter, e.g.: PD10converter.a)b)Fig. 12. Program window view:a) eCon, b) software updates