VTTEST23
V. 01 – 29/09/2023
7
©Velleman Group nv
CAT IV-environment, and for measurements in or on distribution
level equipment (fuse boxes, lighting circuits, electric ovens).
CAT
IV
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.
Note that for all measurements on equipment for which the supply
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 II 230 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 230 V
in
CAT II
7.
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
degree 1
No pollution or only dry, nonconductive pollution occurs. The
pollution has no influence. (only to be found in hermetically
sealed enclosures)
Pollution
degree 2
Only nonconductive pollution occurs. Occasionally,
temporary conductivity caused by condensation is to be
expected. (home and office environments fall under this
category)
Pollution
degree 3
Conductive pollution occurs, or dry nonconductive pollution
occurs that becomes conductive due to condensation that is
to be expected.
(industrial environments and environments exposed to
outside air - but not in contact with precipitation)
Pollution
degree 4
The pollution generates persistent conductivity caused by
conductive dust or by rain or snow. (exposed outdoor
environments and environments where high humidity levels
or high concentrations of fine particles occur)
