Hioki CM4141 Manual De Instrucciones página 14

Usage Notes
8
CAUTION
Avoid dropping or jarring the instrument, which could damage the jaw,
adversely affecting measurement.
IMPORTANT
Clamp the instrument around only one conductor. The instrument will
not be able to make a measurement if you clamp it around two or
more wires together, regardless of whether they are part of a single-
phase or three-phase circuit.