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


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