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observe the following 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 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)
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 con-
nected 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 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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