
27.10.2010
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4. Ov
DMMs are
that might
induced in
The existin
CAT I
A
c
c
CAT II
A
a
a
c
e
CAT III
A
e
p
e
(l
CAT IV
A
I
N
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Warning:
This device
IV 600V /
related to
use. Refer
This devic
•
Protecte
electroni
•
circuits t
o
measu
mean
o
mono-
dome
CAT I
more
• measure
meter b
• measure
CAT IV-e
bars, lo
ircuit.
witch off the met
r fuses.
hen carrying out
lways be aware t
i
ht dama
e the
rvoltage/in
ategorized depen
occur at the point
system, e.g. ca
categories acco
CAT I-rated met
rcuits that are no
rcuits, control sig
CAT II-rated met
nd mono-phase a
plug and circuits
rcuit is at least 1
nvironment. E.g.
CAT III-rated me
nvironments, as
hased appliances
nvironment, and
ow-voltage distri
CAT IV-rated me
I-environments a
ote that for all m
n outdoors (eith
sed.
was designed in
AT III 1000V. Thi
oltages and volta
o the table abov
e is suitable for
electronic circuit
s circuits, control
at are directly co
rements on mono
of a plug
phase appliances
tic environment,
-environment. E.
han 10m from a
ents in/on low-
x)
ents on (fixed)
nvironments (e.g.
-voltage distribut
DVM4x0
6
er and remove te
measurements o
at high amplitud
meter.
tallation ca
ing on the risk a
of test. Transient
sed by lightning
ding EN 61010-1
r is suitable for
directly connect
als…
er is suitable for
pliances that are
in a normal dome
m apart from a C
ousehold applian
ter is suitable for
ell as for measur
hich are at least
or measurements
ution boards, ligh
er is suitable for
well as on the p
asurements on e
r overhead or un
ccordance with E
s implies that cer
e peaks which ca
.
measurements
that are not dir
signals, circuits
nnected to mains
-phase appliance
and circuits direct
rovided that the
. household appli
istribution board
oltage distributio
ono- or poly-ph
mains outlets, el
on boards and cir
0
t probes prior to
a TV set or switc
voltage pulses a
egory
d severity of tra
are short-lived
trike on a power l
are:
easurements on
d to mains powe
easurements in
connected to the
tic environment,
T III- or 20m ap
es, portable tool
measurements in
ments on (fixed)
10m apart from
in or on distributi
ting circuits, elect
easuring in CAT
imary supply lev
uipment for whic
erground) a CAT
61010-1 install
ain restrictions in
n occur within th
p to 1000V:
ctly connected to
ehind isolating tr
power, but limite
that are connect
ly connected to t
ircuit is at least 1
ances, portable t
boards (distribut
sed appliances a
ctric ovens, light
uit breakers).
©Velleman
eplacing the batt
hing power circuit
the test points
sient overvoltage
ursts of energy
ine.
rotected electroni
, e.g. electronics
AT I-environmen
mains by means
provided that the
rt from a CAT IV
…
CAT I- and CAT I
mono- or poly-
f a CAT IV-
n level equipme
ric ovens).
I-, CAT II- and C
l.
the supply cabl
IV meter must b
tion category CA
use apply that ar
environment of
mains power, e.g
nsformer…
to:
d to the mains b
e mains in a nor
0m apart from a
ols, light circuits
ion boards behind
d circuits except i
ng circuits, bus
nv
ry
s,
c
s
f
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t
T
s
al
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