Explanation Of Symbols - VOLTCRAFT VC-519 Mode D'emploi

5. EXPLANATION OF SYMBOLS

An exclamation mark in a triangle shows important notes in these operating instruc-
tions that must be strictly observed.
The triangle containing a lightning symbol warns of danger of electrical shock or
impairment of the electrical safety of the device.
A lightning symbol in the square permits current measurement on uninsulated, dan-
gerously active conductors and warns of the possible dangers. Personal protection
equipment must be worn.
The arrow symbol indicates special advice and operating information.
This device is CE-compliance and meets the applicable European directives.
Protection class 2 (double or reinforced insulation, protective insulation)
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-dis-
tribution). 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 installa-
tion (e.g. main distribution, 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
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