E-Mon E-PS-S-HV-RTU - Manual (Page 150)

Chapter 6 Device Control and Upgrading Upgrading Meter Firmware
150 PowerSmart Socket Power Quality Meter
logon again so the IP address you used for connecting
to the meter will no longer be supported. You should
check the meter for a new GPRS network IP address
either from the front display, or via Power Software
using another communication port.