Precautions Before Use - AEMC 6550 User Manual

This instrument and its accessories comply with safety standards IEC 61010-1, IEC 61010-031, and
IEC 61010-2-030 for voltages of 1000V in Category IV at an altitude of less than 2000m, indoors, with
a degree of pollution of not more than 2. Failure to observe the safety instructions may result in electric
shock, fire, explosion, and destruction of the instrument and of the installations.
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The operator and/or the responsible authority must carefully read and clearly understand the
various precautions to be taken in use. Sound knowledge and a keen awareness of electrical
hazards are essential when using this instrument.
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If the instrument is used other than as specified, the protection it provides may be
compromised, thereby endangering you.
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Do not use the instrument on networks of which the voltage or category exceeds those
mentioned.
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Do not use the instrument if it seems to be damaged, incomplete, or poorly closed.
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Before each use, check the condition of the insulation on the leads, housing, and accessories.
Any item of which the insulation is deteriorated (even partially) must be set aside for repair or
scrapping.
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Use only the leads and accessories supplied. Using leads (or accessories) of a lower voltage or
category reduces the voltage or category of the combined instrument and leads (or accessories)
to that of the leads (or accessories).
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Use personal protection equipment systematically.
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Keep your hands away from the terminals of the instrument.
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When handling the leads, test probes, and alligator clips, keep your fingers behind the physical
guard.
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As a safety measure, and to avoid interference, do not move and do not handle the leads during
measurements.
Definition of Measurement Categories (CAT)
■ CAT IV - 3-Phase at utility connection, outdoor conductors:
- Origin of installation, or where low-voltage connection is made to utility power
- Electricity meters, primary overcurrent protection equipment
- Outside and service entrance, service drop from pole to building, runs between meter & panel
- Overhead line to detached building, underground line to well pump
■ CAT III - 3-Phase distribution, including single-phase commercial lighting:
- Equipment in fixed installations, such as switchgear and polyphase motors
- Bus and feeder in industrial plants
- Feeders and short branch circuits, distribution panel devices
- Appliance/equipment outlets with short connections to service entrance
■ CAT II - Single-phase, receptacle-connected loads:
- Appliances, portable tools, and other similar light industrial/household loads
- Outlet and long-branch circuits
- Outlets at more than 30 ft from CAT III source
- Outlets at more than 60 ft from CAT IV source
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