
22.06.2
4. O
DMMs a
occur at
caused
The exis
CAT I
CAT II
CAT III
CAT IV
Warnin
This de
II 1000
voltage
This de
•
Prot
circ
•
circ
o
m
pl
o
m
en
fr
th
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• mea
• mea
envi
distr
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• Volt
• Mea
equi
gard
light
5. Po
IEC 610
measur
protecti
the insu
which e
10
ervoltag
e categorized
the point of t
y lightning st
ting categorie
A CAT I-rated
are not direct
A CAT II-rate
phase applian
normal dome
III- or 20m a
A CAT III-rat
as well as for
least 10m ap
distribution le
A CAT IV-rate
environments
Note that for
(either overh
:
ice was desig
. This implies
eaks which c
ice is suita
cted electroni
its, control si
its which are
asurements o
g
no-phase app
ironment, pr
m a CAT IV-e
n 10m from a
ice is suita
urements in/
urements on
onments (e.g
ibution boards
ice is NOT s
ges above 10
urements on
ment/circuits
en houses an
ing, pool-pum
This device is
in CAT II en
llution de
10-1 specifies
s are necessa
n against the
ation and the
vironment th
/installat
depending on
st. Transients
ike on a powe
according EN
meter is suita
y connected t
meter is suit
ces which are
tic environme
art from a CA
d meter is sui
measurement
rt from of a C
el equipment
d meter is sui
as well as on
ll measurem
ad or undergr
ed in accorda
that certain r
n occur withi
le for measu
c circuits whic
nals, circuits
irectly conne
n mono-phase
liances and ci
vided that th
vironment. E.
distribution b
le for measu
n low-voltage
(fixed) mono-
mains outlet
and circuit br
itable for:
0V
istribution eq
outside or re
free-standing
...
only suitable
ironments.
ree
different type
y to ensure s
pollution whic
enclosure pro
device may
DVM11
5
ion categ
the risk and s
are short-live
r line.
61010-1 are:
ble for measu
mains power
ble for meas
connected to
nt, provided t
IV-environm
able for meas
on (fixed) m
T IV-environ
(fuse boxes, l
able for meas
he primary s
nts on equip
ound) a CAT I
ce with EN 6
strictions in u
the environ
ements up t
are not dire
ehind isolatin
ted to mains
appliances w
cuits directly
circuit is at l
g. household
ard …
ements up t
distribution b
or poly-phase
, electric ove
akers).
uipment and
ote from the
garages , or
or measurem
of pollution e
fety. Harsher
is to be foun
erties. The p
e used.
00
ry
verity of tran
bursts of en
ements on pr
, e.g. electron
rements in C
he mains by
at the circuit i
ent. E.g. hous
urements in C
no- or poly-p
ent, and for
ighting circuit
ring in CAT I-
pply level.
ent for which
meter must
010-1 installa
e apply that
ent of use. Re
1000V on:
tly connected
transformer
ower, but limi
ich are conne
onnected to t
ast 10m apar
ppliances, po
600V:
ards (distribu
appliances a
s, lighting circ
utdoor install
domestic envi
ircuits using
nts up to 60
nvironments,
environments
d in a certain
llution degree
ient overvolt
rgy induced i
tected electro
cs circuits, co
T I-environm
eans of a plu
s at least 10m
hold applianc
T I- and CAT
ased applian
easurement
, electric oven
, CAT II- and
he supply ca
be used.
ion category
re related to
fer to the tabl
to mains pow
ted to:
ted to the ma
e mains in a
from a CAT I
table tools, lig
tion boards b
d circuits exc
uits, bus bars,
tions includin
onment e.g.
nderground w
V in CAT III
or which diffe
require more
nvironment d
rating of the
Re
©Vellema
ge that might
a system, e.
nic circuits wh
trol signals…
nts and mono
and circuits i
apart from a
es, portable t
II-environme
es which are
in or on
s).
AT III-
les run outdo
AT III 600V /
oltages and
above.
r, e.g. electro
ins by means
ormal domest
I- or 20m apa
ht circuits at
hind meter bo
ept in CAT IV-
low-voltage
meter boxes
ircuits in shed
iring e.g. gard
and up to 10
ent protective
rotection, an
pends mainl
VM indicates
. 01
n nv
.
ich
a
AT
ols…
ts,
t
rs
CAT
ics
f a
ic
rt
ore
x)
and
,
n
0V
the
on
n
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