Hioki CT6700, Instruction Manual, Page: 25 / 72

21
Usage Notes
Reference
• At high frequencies, common mode noise may affect
measurements taken on the high voltage side of
circuits. If this occurs, reduce the frequency range of
the waveform measurement instrument, or clamp onto
the low-voltage side of the circuit, as appropriate.
H L
OK
Load
Power
source
• Depending on the amplitude and frequency of the
current being measured, the sensor head may emit
a resonant sound. This sound may also occur during
demagnetizing operation, but it does not represent a
malfunction (device failure).
• If foreign matter becomes adhered to the facing
surfaces on the sensor head so that a slight gap exists
between the upper and lower sensors, the sensor head
may emit a resonant sound. Any foreign matter should
be removed using the cleaning method described in this
manual (see “4.3 Cleaning” (p. 63)).