3
2.3.8 Event Recording ............................................................................................. 19
2.3.9 10/12-Cycle Block Recording.................................................................... 19
2.3.10 Variable time interval trends..................................................................... 20
2.3.11 Synchrophasors.............................................................................................. 20
2.3.12 Measured parameters .................................................................................. 21
2.3.13 Technical Specification ................................................................................ 24
2.4 Impedo Duo External Interfaces ..........................................................27
2.4.1 Physical Appearance .................................................................................... 27
2.4.2 Power Supply .................................................................................................. 29
2.4.3 Voltage Inputs ................................................................................................. 32
2.4.4 Current Sensor Inputs .................................................................................. 34
2.4.5 Current Transducer Inputs ........................................................................ 36
2.4.6 Relay Outputs.................................................................................................. 37
2.4.7 GPS ...................................................................................................................... 38
2.4.8 Ethernet Ports................................................................................................. 39
2.4.9 USB Peripheral Ports .................................................................................... 40
2.4.10 OLED Display .................................................................................................. 40
2.4.11 Multi-Touch Display ..................................................................................... 41
2.5 Firmware ....................................................................................................41
2.5.1 Upgrading ......................................................................................................... 41
3 Operating Instructions 42
3.1 Precautions when first using the device............................................42
3.2 Checking the Battery Level ....................................................................43
3.3 Powering up the Impedo Duo ...............................................................44
3.4 Impedo Duo Unlock Screen ...................................................................45
3.5 Shutting down ...........................................................................................46
3.6 Power Cycling with the Reset Switch ..................................................47