Operating Precautions
8
Handling the Instrument
• Do not allow the instrument to get wet, and do not take measure-
ments with wet hands. This may cause an electric shock.
• Never modify the instrument. Only Hioki service engineers
sho
uld disassemble or repair the instrument. Failure to observe
these precautions may result in fire, electric shock, or injury.
• To avoid electric shock when measuring live lines, wear appro-
priate protective gear, such as insulated rubber gloves, boots
and
a safety helmet.
To avoid damage to the instrument, protect it from physical shock when
transporting and handling. Be especially careful to avoid physical shock
from dropping.
This instrument may cause interference if used in residential areas. Such use must be
avoided unless the user takes special measures to reduce electromagnetic emissions
to prevent interference to the reception of radio and television broadcasts.
Handling the cords and clamps
Connect the clamp-on sensors or voltage cords to the instrument
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,
nev
er attach the clamp to a circuit that operates at more than the
maximum rated voltage to earth (9660: 300 VAC, 9661: 600 VAC,
9667: 1000 VAC, 9669: 600 VAC, 9694:300 VAC), or over bare con-
ductors.
• Clamp sensor and voltage cords should only be connected to the
seco
ndary side of a breaker, so the breaker can prevent an acci-
dent if a short circuit occurs. Connections should never be made
t
o the primary side of a breaker, because unrestricted current
flow could cause a serious accident if a short circuit occurs.
• Do not allow the voltage cord clips to touch two wires at the
same t
ime. Never touch the edge of the metal clips.
• Use only the supplied L9438-55 Voltage Cord to connect the
pr
oduct input terminals to the circuit to be tested.
• 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.
Maximum rated voltage to earth Clamp sensors
AC1000 V 9667
AC600 V 9661, 9669
AC300 V
9660, 9694, 9695-02, 9695-03,
9657-10, 9675
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