B) Symbols On The Product - VOLTCRAFT VC-330 Operating Instructions Manual

b) Symbols on the product

Symbol Meaning
This product conforms to CE standards and complies with the
necessary European directives.
The device is built according to protection class II (double or reinforced
insulation, protective insulation).
The lightning symbol in the square permits current measurements on
uninsulated, hazardous active conductors and warns of the possible
hazards. Personal protective equipment must be used.
Measurement category II for measurements on electrical and
electronic devices that are directly connected to the mains voltage via
CAT II
a mains plug. This category also includes all lower categories (e.g.
CAT I for measuring signal and control voltages).
Measurement category III for measurements in building installations
(e.g. power outlets and sub-distribution units). This category also
includes all lower categories (e.g. CAT II for measuring electrical
CAT III
devices). Measuring in CAT III is only permitted with test prods with
a maximum free contact length of 4 mm or with cover caps over the
test prods.
Earth potential
Symbol for the capacitance measuring range
Polarity markings (positive and negative) for direct current
measurement. The symbols show the direction of the current flow to
ensure the correct polarity when measuring.
Position marker for the conductor to ensure the correct current
measurement.
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