Pollution Degree - Velleman DCM120 Mode D'emploi

The existing categories according EN 61010-1 are:
A CAT I-rated meter is suitable for measurements on protected
CAT I electronic circuits that are not directly connected to mains power, e.g.
electronics circuits, control signals...
A CAT II-rated meter is suitable for measurements in CAT I-
environments and mono-phase appliances that are connected to the
CAT mains by means of a plug and circuits in a normal domestic
II 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
appliances, portable tools...
A CAT III-rated meter is suitable for measurements in CAT I- and
CAT II-environments, as well as for measurements on (fixed) mono-
CAT
or poly-phased appliances which are at least 10 m apart from of a
III
CAT IV-environment, and for measurements in or on distribution level
equipment (fuse boxes, lighting circuits, electric ovens).
A CAT IV-rated meter is suitable for measuring in CAT I-, CAT II- and
CAT III-environments as well as on the primary supply level.
CAT
Note that for all measurements on equipment for which the supply
IV
cables run outdoors (either overhead or underground) a CAT IV
meter must be used.
Warning:
This device was designed in accordance with EN 61010-1 installation
category CAT III 600 V. This implies that certain restrictions in use apply
that are related to voltages and voltage peaks which can occur within the
environment of use. Refer to the table above.
This device is only suitable for measurements up to 600 V in
CAT III

8. Pollution Degree

IEC 61010-1 specifies different types of pollution environments, for which
different protective measures are necessary to ensure safety. Harsher
environments require more protection, and the protection against the
pollution which is to be found in a certain environment depends mainly on
the insulation and the enclosure properties. The pollution degree rating of
the DVM indicates in which environment the device may be used.
Pollution No pollution or only dry, nonconductive pollution occurs. The
degree 1 pollution has no influence. (only to be found in hermetically
sealed enclosures)
Pollution Only nonconductive pollution occurs. Occasionally, temporary
degree 2 conductivity caused by condensation is to be expected.(home
and office environments fall under this category)
V. 04 – 25/02/2020
DCM120
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