Velleman DVM851, Руководство пользователя

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DVM851
V. 03 – 23/10/2015 7 ©Velleman nv

"10A" jack
Insert the red test lead in this connector in order to measure a
max. current of 10A.

"COM" jack
Insert the black (negative) test lead.

"V  mA" jack
Insert the red (positive) test lead in this connector to measure
voltage, resistance and current (except 10A).
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
1
A CAT 1-rated meter is suitable for measurements on protected
electronic circuits that are not directly connected to mains
power, e.g. electronics circuits, control signals…
CAT
2
A CAT 2-rated meter is suitable for measurements in CAT 1-
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 10m
apart from a CAT 3- or 20m apart from a CAT 4-environment.
E.g. household appliances, portable tools…
CAT
3
A CAT 3-rated meter is suitable for measurements in CAT 1-
and CAT 2-environments, as well as for measurements on
(fixed) mono- or poly-phased appliances which are at least 10m
apart from of a CAT 4-environment, and for measurements in
or on distribution level equipment (fuse boxes, lighting circuits,
electric ovens).
CAT
4
A CAT 4-rated meter is suitable for measuring in CAT 1-, CAT 2-
and CAT 3-environments as well as on the primary supply level.
Note that for all measurements on equipment for which the
supply cables run outdoors (either overhead or underground) a
CAT 4 meter
must be used.
Warning:
This device was designed in accordance with EN 61010-1 installation
category CAT 2 600V. This implies that certain restrictions in use apply