Hioki CM3289 Manuel D'instructions page 12

Safety Notes
Symbols affixed to the device
Precaution or hazard (See corresponding
topic.)
Risk of electric shock
Protected throughout by double insulation
or reinforced insulation
Device may be connected to or
disconnected from a live conductor
Flexible sensors can be connected to or
disconnected from live conductors when
using appropriate protective insulation.
Other sensors can only be connected to
or disconnected from insulated conductors
suited to the voltage of the conductor under
measurement.
Grounding terminal
DC (direct current)
AC (alternating current)
EN-2
Actions that must be performed