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Velleman DCM140 Mode D'emploi page 6

Cat iii 600 v

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  • FRANÇAIS, page 30
Always be careful when working with voltages above 60 VDC or 30 VAC
rms. Keep your fingers behind the probe barriers at all times during
measurement.
Never perform resistance, diode or continuity measurements on live
circuits. Make sure all capacitors in the circuit are depleted.
6. General Description
Refer to the illustration on page 2 of this manual:
1.
NCV sensor
2.
Clamp jaws
3.
Flashlight
4.
NCV LED indicator
5.
Flashlight switch
6.
Clamp trigger
7.
Selection button
8.
Backlight button
9.
Display
3 ½ digits
10. Function buttons
11. Input jacks
7. Overvoltage/Installation Category
DMMs are categorized depending on the risk and severity of transient
overvoltage that might occur at the point of test. Transients are short-lived
bursts of energy induced in a system, e.g. caused by lightning strike on a
power line.
The existing categories according EN 61010-1 are:
A CAT I-rated meter is suitable for measurements on protected
CAT I
electronic circuits that are not directly connected to mains power, e.g.
electronics circuits, control signals...
A CAT II-rated meter is suitable for measurements in CAT I-
environments and mono-phase appliances that are connected to the
CAT
mains by means of a plug and circuits in a normal domestic
II
environment, provided that the circuit is at least 10 m apart from a
CAT III- or 20 m apart from a CAT IV-environment. E.g. household
appliances, portable tools...
A CAT III-rated meter is suitable for measurements in CAT I- and
CAT II-environments, as well as for measurements on (fixed) mono-
CAT
or poly-phased appliances which are at least 10 m apart from of a
III
CAT IV-environment, and for measurements in or on distribution level
equipment (fuse boxes, lighting circuits, electric ovens).
V. 01 – 26/02/2019
DCM140
6
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