Velleman DVM840 User Manual page 5

When carrying out
always be aware th
damage the meter.
Do not replace inte
by identical ones w
test probes at your
Switch off the met
or fuses.
All modifications o
caused by user mo
4. Ov vervoltage/ins
DMMs are e categorized depen
that might t occur at the point
induced in n a system, e.g. caus
The existin ng categories accor
A C CAT I‐rated meter is
CAT I cir rcuits which are not
cir rcuits, control signa
A C CAT II‐rated meter i
mo ono‐phase applianc
CAT II an d circuits in a norm
lea ast 10m apart from
ho ousehold appliances
A C CAT III‐rated meter
en vironments, as wel
CAT III ap ppliances which are
me easurements in or o
cir rcuits, electric ovens
A C CAT IV‐rated meter
en vironments as well
CAT IV
No ote that for all meas
ou utdoors (either over
Warning:
This devic e was designed in a
600V. This s implies that certai
voltage pe eaks which can occu
above.
T This device is only su
environment. e
5. Po llution degree
IEC 61010 ‐1 specifies differen
protective e measures are nece
more prot tection, and the pro
certain en vironment depends
The pollut tion degree rating o
may be us sed.
18.10.201 0
DVM840
measurements on
hat high amplitude v
.
ernal parts yourself
with the same speci
r dealer.
er and remove test
of the device are for
odifications to the d
stallation cate
nding on the risk an
of test. Transients
sed by lightning stri
ding EN 61010‐1 ar
s suitable for measu
t directly connected
ls...
is suitable for meas
ces which are conne
mal domestic enviro
a CAT III‐ or 20m ap
s, portable tools...
is suitable for mea
l as for measureme
at least 10m apart
on distribution leve
s).
is suitable for mea
as on the primary s
surements on equip
rhead or undergrou
accordance with EN
n restrictions in use
ur within the enviro
uitable for measure
e
nt types of pollution
essary to ensure saf
otection against the
s mainly on the insu
of the DVM indicate
5
a TV set or switchin
voltage pulses at th
f. Replace damaged
fications. Order spa
t probes prior to rep
rbidden for safety re
evice is not covered
egory
nd severity of transi
are short‐lived burs
ike on a power line
re:
urements on protec
d to mains power, e
surements in CAT I‐e
ected to the mains b
nment, provided th
part from a CAT IV‐
surements in CAT I‐
ents on (fixed) mono
from of a CAT IV‐en
l equipment (fuse b
suring in CAT I‐, CA
supply level.
pment for which the
nd) a CAT IV meter
61010‐1 installatio
e apply that are rela
onment of use. Refe
ements up to 600V
n environments, for
fety. Harsher enviro
e pollution which is
ulation and the enc
es in which environm
ng power circuits,
e test points might
d or lost accessories
are accessories e.g.
placing the battery
easons. Damage
d by the warranty.
ent overvoltage
sts of energy
.
cted electronic
e.g. electronics
environments and
by means of a plug
hat the circuit is at
environment. E.g.
‐ and CAT II‐
o‐ or poly‐phased
nvironment, and fo
boxes, lighting
T II‐ and CAT III‐
e supply cables run
must be used.
on category CAT III
ated to voltages and
er to the table
in a CAT III
r which different
onments require
to be found in a
losure properties.
ment the device
©Velleman n
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