Extech Instruments 7470 Operation Manual page 11

NFPA 70E
OSHA 1910 subpart (S)
EN50191
Dress
Operators should not wear jewelry that could accidentally complete a circuit.
Medical Restrictions
Personnel with heart ailments or devices such as pacemakers should be informed that
the voltages and currents generated by the
instrument are very dangerous. If contacted
it may cause heart-related problems that a
person of good health may not experience.
Please have the test operator consult their
physician for recommendations.
1.4.4. Instrument Connections
The instrument is equipped with a safety ground connection, be sure that this
is connected to a good earth ground.
Always connect the return lead first, regardless of whether the item under test is a
sample of insulating material, a component tested with the high voltage test lead, or a
cord-connected device with a two or three prong plug. The return lead should be
connected first for any type of hipot testing.
Plug in the high voltage test lead only when it is being used. Handle its clip only by the
insulator---never touch the clip directly. Be certain that the operator has control
over any remote test switches connected to the Hipot. Double check the return and
high voltage connections from the Hipot and the Line, Neutral, Ground and Case
connections from the Line Leakage tester to be certain that they are proper and secure.
ESD protocols should not be observed while performing
electrical safety tests. Intentionally grounding the test operator
could lead to a harmful or fatal electric shock.
Never perform a hipot test on energized circuitry or equipment.
KEY SAFETY POINTS TO
REMEMBER
Keep unqualified and
unauthorized personnel away
from the test area.
Arrange the test station in a safe
and orderly manner.
In case of any problem, turn off
the high voltage first.
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