NF DP420LS Instruction Manual page 164

 Switching the monitor output
1. Press the MENU key to move to the root menu, then select [System].
2. Put the cursor on [Setup] of the [Monitor] item, then press the ENTER key.
3. «Only for polyphase system» For the [Phs] item, select the desired phase.
DP420LS/DP480LS
4.10 Using Monitor Function
145