MAC TOOLS EM721 Manual Del Usuario página 5

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Especially in marine applications with inboard or inboard/outboard engines, make sure work area is
well ventilated. Operate bilge blower for at least four minutes before starting engine or making test lead
connections.
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Always avoid working alone.
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Do not use the meter if the meter or your hand is wet.
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Remaining endangerment: When an input terminal is connected to dangerous live potential, it is to be
noted that this potential can occur at all other terminals!
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CAT III - Measurement Category III is for measurements performed in the building installation. Examples
are measurements on distribution boards, circuit breakers, wiring, including cables, bus-bars, junction
boxes, switches, socket-outlets in the fixed installation, and equipment for industrial use and some other
equipment, for example, stationary motors with permanent connection to the fixed installation. Do not use
the meter for measurements within Measurement Categories IV.
TO AVOID POSSIBLE DAMAGE TO THE METER OR TO THE EQUIPMENT BEING TESTED,
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Disconnect circuit power and discharge all capacitors thoroughly before testing resistance, diode,
capacitor, temperature, and continuity.
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Use the proper terminals, function, and range for your measurements.
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Before measuring current, check the meter's fuses and turn off power to the circuit before connecting the
meter to the circuit.
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Before turning the rotary switch to change functions, disconnect the test leads from the circuit being tested.
800.MACTOOLS
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