BK Precision 1804D Manual De Instrucciones página 12

TEST INSTRUMENT SAFETY
6. Some equipment with a two-wire ac power cord, including some with polarized power plugs, is the "hot chassis" type. This includes most
recent television receivers and audio equipment. A plastic or wooden cabinet insulates the chassis to protect the customer. When the
cabinet is removed for servicing, a serious shock hazard exists if the chassis is touched. Not only does this present a dangerous shock
hazard, but damage to test instruments or the equipment under test may result from connecting the ground lead of most test instruments to
a "hot chassis". To test "hot chassis" equipment, always connect an isolation transformer between the ac outlet and the equipment under
test. The B+K Precision Model TR-110 or 1604 Isolation Transformer, or Model 1653 or 1655 AC Power Supply is suitable for most
applications. To be on the safe side, treat all two- wire ac equipment as "hot-chassis" unless you are sure it has an isolated chassis or an
earth ground chassis.
7. On test instruments or any equipment with a 3-wire ac power plug, use only a 3-wire outlet. This is a safety feature to keep the housing or
other exposed elements at earth ground.
8. Never work alone. Someone should be nearby to render aid if necessary. Training in CPR (cardio-pulmonary resuscitation) first aid is
highly recommended.
(continued from inside front cover)
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