10
IM 702915-01EN
• Do not bring conductors running 10 kHz or higher current near
the instrument’s sensor head. The sensor head temperature
may increase due to self-heating from the current running
through the conductor and may be damaged. As shown in the
figure below, if one of a bidirectional conductor is clamped
and the other conductor is near the sensor head, the self-
heating induced by the bidirectional current, even if the
current is less than the maximum rated current, will cause a
large temperature increase. Be careful as this may damage
the sensor head.
• Even when the current is less than the maximum rated
current, self-heating may damage the instrument.
The maximum rated current is a recommended value when
a sine signal is applied under standard conditions. Self-
heating increases if the ambient temperature increases or
if the measured current waveform contains other frequency
components. See the derating characteristics in the product
specifications.
• In addition to the maximum rated current, the product
specifications that indicate the maximum input range include
“maximum peak current (discontinuous),” which is an absolute
upper limit that cannot be exceeded even for an instant. To
prevent damaging the instrument, do not measure current that
exceeds the maximum peak current.
• The overload warning may not work when current outside the
overload detection frequency range is measured. Regardless
of whether the OVERLOAD LED is blinking, be careful not to
exceed the maximum rated current.
Safety Precautions
