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Please pay attention to the following symbols:
An exclamation mark in a triangle indicates important notices in these operating instructions which have
to be observed under all circumstances!
The triangle containing a lightning symbol warns of danger of an electric shock or of the impairment of the
electrical safety of the device.
The "arrow" symbol indicates special information and advice on operation of the device.
This product has been CE-tested and meets the necessary European guidelines.
Class 2 insulation (double or reinforced insulation)
CAT II
Measuring category II for measurements on electric and electronic devices connected to the mains sup-
ply with a power plug. This category also covers all smaller 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 permissible with cover caps at the measuring prods.
CAT IV
Measuring category IV for measuring at the source of the low-voltage installation (e.g. main distribution,
house-transfer points of energy providers, etc.).
Ground potential
The unauthorised conversion and/or modification of the unit is inadmissible because of safety and approval reasons
(CE).
Consult an expert when in doubt about the operation, the safety or the connection of the device.
Measuring instruments and accessories are not toys and have no place in the hands of children.
On industrial sites the accident prevention regulations of the association of the industrial workers' society for electri-
cal equipment and utilities must be followed.
In schools, training centres, computer and self-help workshops, handling of measuring instruments must be super-
vised by trained personnel in a responsible manner.
The voltage between the measuring instrument connection points and earth must never exceed 250 V DC/AC in
CAT III.
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