Usage Notes
8
Before Connecting Measurement Cables
• The maximum input voltage is 1500 VDC, 1500 Vrms. Attempting to measure
voltage in excess of the maximum input could destroy the instrument and
result in personal injury or death.
• Never exceed a current sensor’s input current rating. Doing so could destroy
the instrument and cause personal injury.
• The maximum rated voltage between input terminals and the ground is as follows;
(CAT II) 1000 VDC, 1000 Vrms
(CAT III) 600 VDC, 600 Vrms
Attempting to measure voltages exceeding this level with respect to ground
could damage the instrument and result in personal injury.
• Before turning the instrument on, make sure the source voltage matches that
indicated on the instrument's power connector. Connection to an improper
supply voltage may damage the product and present an electrical hazard.
• To avoid electrical accidents and to maintain the safety specifications of this
instrument, connect the power cord only to a 3-contact (two-conductor +
ground) outlet.
The power supply voltage for this product is switchable. To avoid electrical acci-
dents, check that the voltage selector is set correctly for the supply voltage you
are using.
Before Connecting to the Lines to be Measured
To avoid electrical hazards and damage to the instrument, do not apply voltage/
exceeding the rated maximum to the external input terminals.
• To avoid electrical accidents, confirm that all connections are secure. The
increased resistance of loose connections can lead to overheating and fire.
• Ensure that the input does not exceed the maximum input voltage or current to
avoid instrument damage, short-circuiting and electric shock resulting from
heat building.
• When the power is turned off, do not apply voltage or current to the voltage input termi-
nals, current input terminals, or current sensors. Doing so may damage the instrument.
• Note that the instrument may be damaged if the applied voltage or current exceeds
the measurement range.
While Measuring
If an abnormality such as smoke, strange sound or offensive smell occurs, stop
measuring immediately, disconnect from the measurement lines, turn off the
instrument, unplug the power cord from the outlet, and undo any changes to the
wiring. Contact your dealer or Hioki representative as soon as possible. Continu-
ing to use the instrument may result in fire or electric shock.
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