Instructions

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Observe the following symbols:
An exclamation mark in a triangle shows important notes in these operating instructions that must be
strictly observed.
The triangle containing a lightning symbol warns of danger of electrical shock or impairment of the electri-
cal safety of the device.
The arrow symbol indicates that special advice and notes on operation are provided.
This device is CE-compliant 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-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
For safety and approval reasons, unauthorised conversion and/or modication of the device are not permitted.
Consult an expert when in doubt as to the operation, safety or the connection of the device.
Meters and accessories are not toys and have no place in the hands of children!
In commercial institutions, the accident prevention regulations of the Employer’s Liability Insurance Association for
Electrical Systems and Operating Materials are to be observed.
In schools, training centres, computer and self-help workshops, handling of meters must be supervised by trained
personnel in a responsible manner.
Ensure before every measurement that the meter is not set to another measuring range. Also observe that the
HOLD button has not been pushed at the beginning of the measurement (display with the HOLD button pushed:
“H”). If the HOLD function is activated before commencement of the measurement, no measured value is displayed!
Probe assemblies to be used for MAINS measurements shall be RATED as appropriate for MEASUREMENT
CATEGORY III or IV according to IEC 61010-031 and shall have a voltage RATING of at least the voltage of the
circuit to be measured.