
22.04.2011
W
al
m
4. Ove
DMMs are c
that might o
induced in a
The existing
CAT I
A
cir
cir
CAT II
A
an
a
cir
en
CAT III
A
en
ph
en
(l
CAT IV
A
III
N
ru
us
Warning:
This device
IV 600V / C
related to v
use. Refer t
This devic
•
Protected
electronic
•
circuits th
o
measur
means
o
mono-p
domest
CAT IV-
more t
• measure
meter bo
• measure
CAT IV-e
bars, low-
This devic
• Measure
boxes an
e.g. circui
undergro
en carrying out m
ays be aware tha
ht dama
e the m
voltage/inst
tegorized dependi
ccur at the point o
system, e.g. caus
categories accordi
AT I-rated meter i
cuits that are not
cuits, control signa
AT II-rated meter
d mono-phase app
lug and circuits in
cuit is at least 10
vironment. E.g. ho
AT III-rated mete
vironments, as wel
ased appliances w
vironment, and for
w-voltage distribu
AT IV-rated mete
-environments as
te that for all mea
outdoors (either
d.
as designed in ac
T III 1000V. This i
ltages and voltage
the table above.
is suitable for m
electronic circuits
circuits, control si
t are directly con
ments on mono-p
f a plug
hase appliances an
c environment, pr
environment. E.g.
an 10m from a dis
ents in/on low-vol
)
ents on (fixed) m
vironments (e.g.
voltage distributio
is suitable for m
ents on distributio
equipment/circuit
s in sheds, garden
nd wiring e.g. gar
DVM4200
6
asurements on a
high amplitude vo
ter.
llation cate
g on the risk and
test. Transients a
d by lightning stri
g EN 61010-1 are
s suitable for mea
irectly connected t
ls…
is suitable for mea
iances that are co
a normal domestic
apart from a CAT
sehold appliances
is suitable for me
l as for measurem
ich are at least 10
measurements in
ion boards, lightin
is suitable for me
ell as on the prim
urements on equi
verhead or under
ordance with EN 6
mplies that certain
peaks which can o
easurements up
hat are not directl
gnals, circuits behi
ected to mains po
hase appliances th
d circuits directly c
vided that the circ
household applian
ribution board …
age distribution b
no- or poly-phase
ains outlets, elect
boards and circui
easurements up
equipment and o
outside or remot
houses and free-s
en lighting, pool-p
V set or switching
ltage pulses at the
ory
everity of transien
e short-lived burst
e on a power line.
:
urements on prote
mains power, e.g
surements in CAT
nected to the mai
environment, prov
II- or 20m apart f
portable tools…
surements in CAT
nts on (fixed) mon
apart from of a
r on distribution l
circuits, electric o
suring in CAT I-,
ry supply level.
ment for which th
round) a CAT IV m
1010-1 installation
restrictions in use
ccur within the en
o 1000V:
connected to mai
nd isolating transf
er, but limited to:
t are connected to
onnected to the m
it is at least 10m
es, portable tools,
ards (distribution
appliances and ci
ic ovens, lighting c
breakers).
o 600V:
tdoor installations
from the domesti
anding garages ,
mp...
©Velleman nv
power circuits,
test points
overvoltage
of energy
ted electronic
. electronics
-environments
s by means of
ided that the
om a CAT IV-
I- and CAT II-
o- or poly-
AT IV-
vel equipment
ens).
AT II- and CAT
supply cables
eter must be
category CAT
apply that are
ironment of
s power, e.g.
rmer…
the mains by
ins in a normal
part from a
light circuits at
oards behind
cuits except in
ircuits, bus
including meter
environment
r circuits using
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