Hioki CM4001 - Measuring Load Current; Precautions for Load Current Measurement

7
Making Measurements
Measuring load current
Precautions for measuring load current
IMPORTANT
• Clamp the instrument around only one conductor wire. The instrument cannot measure load
current when clamped around two or more wires together in a bundle, regardless of the single-
phase and three-phase.
• Put the conductor perpendicular to the sensor.
• The instrument may not be able to measure rush current or signicantly uctuating current
correctly.
• The instrument can display a readout of other than zero without input at a low temperature;
however, this does not a󰀨ect any measurement.
OK
NO
NO
• The instrument may not be able to measure special waveforms, such as those
owing through the secondary side of an inverter.
• Depending on the magnitude of the input current, the jaws may generate a sound
due to resonance; however, this does not a󰀨ect any measurement.
• When you cannot nd the magnitude of an input current, disable the lter function
and start measurement using the auto range or 600.0 A range.
HIOKI CM4001A963-00