Hioki 3144-20, Руководство пользователя

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Chapter 2 Measurement Preparations
32
2.4.2 Connecting the Instrument to the Line
being Measured
The 9741 CLAMP ON VOLTAGE SENSOR
should first be plugged into the 3144-20
before being connected to the live line being
measured. To avoid short-circuiting or elec-
tric shock, observe the precautions below.
• To avoid short circuits and potentially life-
threatening hazards, never attach the
clamp to a circuit that operates at more
than 200 VAC, or over bare conductors.
• The 9741 should only be connected to the
secondary side of a breaker, so the
breaker can prevent an accident if a short
circuit occurs. Connections should never
be made to the primary side of a breaker,
because unrestricted current flow could
cause a serious accident if a short circuit
occurs.
To avoid electric shock when measuring live
lines, wear appropriate protective gear, such
as insulated rubber gloves, boots and a
safety helmet.
To prevent damage to the instrument and sensor,
never connect or disconnect a sensor while the
power is on, or while the sensor is clamped around
a conductor.