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Voltcraft VC-450 E Manual

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2. Explanation of symbols
The symbol with a lightning bolt in a triangle is used where there is a health hazard, e.g. from electric shock.
The exclamation mark in a triangle indicates important notes in these operating instructions that must be
observed strictly.
The arrow symbol indicates that special advice and notes on operation are provided.
This device is CE-compliance and meets the applicable European directives.
Protection class 2 (double or reinforced insulation, protective insulation)
IP65 Protection against ingression of dust (dust-tight) and jet water
CAT I Measuring category I for measurements at electrical and electronic devices that are not directly supplied
with mains voltage (e.g. battery-powered devices, protective low voltages, signal and control voltages, etc.)
CAT II Measuring category II for measurements at electrical and electronic devices connected to the mains supply
directly with a mains plug. This category also covers all lower categories (e.g. CAT I for measuring signal
and control voltages).
CAT III Measuring category III for measuring in building installation (e.g. outlets or sub-distribution). This category
also covers all lower categories (e.g. CAT II for measuring electronic devices). Measuring operation in CAT
III is only permitted with measuring prods with a maximum free contact length of 4 mm or with cover caps
above the measuring prods.
CAT IV Measuring category IV for measurements at the source of the low-voltage installation (e.g. main distribu-
tion, building handover points of the energy suppliers, etc.), and outdoors (e.g. work at earthing cable,
outdoor line, etc.). This category also contains all lower categories. Measuring operation in CAT IV is only
permitted with measuring prods with a maximum free contact length of 4 mm or with cover caps above the
measuring prods.
Earth potential
… 37 …


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