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DVM1500
V. 03 04/11/2013 5 ©Velleman nv
category.
Read this manual thoroughly. Familiarise yourself with the functions
of the device before actually using it.
All modifications of the device are forbidden for safety reasons.
Damage caused by user modifications to the device is not covered
by the warranty.
Only use the device for its intended purpose. Using the device in an
unauthorized way will void the warranty. Damage caused by
disregard of certain guidelines in this manual is not covered by the
warranty and the dealer will not accept responsibility for any
ensuing defects or problems.
Make sure the meter is in the appropriate measuring range before
connecting it to a test circuit.
Do not measure circuits that may contain voltages > 600 V.
Do not measure current in circuits with voltages > 250 V.
Do not conduct resistance, diode, or continuity measurements on
live circuits.
Before each use, make sure the test probes are in good condition.
Always place your fingers behind the protective edges of the test
probes while measuring! Never touch free terminals when the
meter is connected to a circuit.
Switch off the meter and remove test probes prior to replacing the
battery or fuses.
When carrying out measurements on a TV set or switching power
circuits, always be aware that high amplitude voltage pulses at the
test points might damage the meter.
4. Overvoltage/Installation Category
DMMs are categorized depending on the risk and severity of transient
overvoltage that might occur at the point of test. Transients are short-lived
bursts of energy induced in a system, e.g. caused by lightning strike on a
power line.
The existing categories according EN 61010-1 are:
CAT I
A CAT I-rated meter is suitable for measurements on protected
electronic circuits that are not directly connected to mains power,

CAT II
A CAT II-rated meter is suitable for measurements in CAT I
environments and mono-phase appliances that are connected to the
mains by means of a plug and circuits in a normal domestic
environment, provided that the circuit is at least 10 m apart from a
CAT III, or 20 m apart from a CAT IV environment. E.g. household

5


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