Safety - Extech Instruments EX520A User Manual

True rms industrial multimeter
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2

Safety

The following safety information must be observed to ensure maximum per-
sonal safety while operating this meter.
Improper use of this meter can cause damage, shock, injury or death. Read and under-
stand this user manual before operating the meter.
Do not use the meter if the meter or test leads appear damaged, or if the meter is not
operating properly.
If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
Use caution when working with signals > 60 V DC or 30 V AC RMS, such voltages pose
a shock hazard.
Never apply voltage or current to the meter that exceeds the specified maximum.
Measuring voltage which exceeds these limits can damage the meter and expose the
operator to a shock hazard. The voltage limits are printed on the front of the meter and
listed in the table in Section 2.2.
Never operate the meter unless the back cover and the battery and fuse covers are in
place and fastened securely.
Never ground yourself when taking electrical measurements. Do not touch exposed
metal pipes, outlets, fixtures, etc., which might be at ground potential. Keep your body
isolated from ground by using dry clothing, rubber shoes, rubber mats, or other ap-
proved insulating material.
When using the test lead probes, keep your fingers behind the finger guards on the test
lead probes.
Turn off power to the circuit under test before opening the circuit. Small amounts of cur-
rent can be dangerous.
Always discharge capacitors and remove power from the device under test before per-
forming Diode, Resistance or Continuity tests.
Never connect the meter leads across a voltage source while the function switch is in
the current, resistance, or diode mode. Doing so can damage the meter.
When changing ranges, always disconnect the test leads from the circuit under test.
Some test lead probe tips may not be long enough to reach the live parts inside some
voltage outlets (especially 240 V outlets) because the contacts are recessed deep in
the outlets. As a result, the reading may show zero (0) volts when the outlet is actually
live and has voltage present.
Do not place or use the device in strong direct sunlight for extended periods.
#NAS100179; r. AA/97576/97580; en-US
WARNING
WARNING
2

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