Hioki MR8880-20, Instruction Manual

Page: 26 / 300

Operating Precautions
16
Connect the clamp-on sensors or connection cords to the instru-
ment first, and then to the active lines to be measured. Observe
the following to avoid electric shock and short circuits.
• To avoid short circuits and potentially life-threatening hazards,
never attach the clamp to a circuit that operates at more than the
maximum rated voltage to earth, or over bare conductors.
• Do not allow the connection cord clips to touch two wires at the
same time. Never touch the edge of the metal clips.
• When the clamp sensor is opened, do not allow the metal part of
the clamp to touch any exposed metal, or to short between two
lines, and do not use over bare conductors.
• Do not leave the Memory HiCorder connected to test objects in
environments where a voltage surge might exceed the dielectric
withstand voltage. Doing so could result in damage to the Mem-
ory HiCorder, bodily injury or fatal accident.
• Do not connect a cable to the instrument while it is connected to
the object to be measured. Otherwise, an electric shock accident
may occur.
• To avoid short-circuit accidents, make certain that connections
are secure.
To prevent damage to the instrument and sensor, never connect or dis-
connect a sensor while the power is on, or while the sensor is clamped
around a conductor.
• Lay the connection cords and various cables away from the power
supply line and ground wire.
• Connecting the connection cords and various cables in a parallel con-
figuration with the inputs of another device (see the figure below) may
result in variations in measurement values and incorrect operation of
the instrument. When connecting with another device in a parallel
configuration, be sure to verify operation.
Measurement Object Memory HiCorder
Other instrument