Velleman DCM120 User manual

DCM120
CAT III 600 V
USER MANUAL 3
HANDLEIDING 15
MODE D'EMPLOI 27
MANUAL DEL USUARIO 40
BEDIENUNGSANLEITUNG 53
INSTRUKCJA OBSŁUGI 67
MANUAL DO UTILIZADOR 80

DCM120
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DCM120
V. 04 –25/02/2020 3 ©Velleman nv
USER MANUAL
1. Introduction
To all residents of the European Union
Important environmental information about this product
This symbol on the device or the package indicates that disposal
of the device after its lifecycle could harm the environment. Do
not dispose of the unit (or batteries) as unsorted municipal
waste; it should be taken to a specialized company for recycling.
This device should be returned to your distributor or to a local
recycling service. Respect the local environmental rules.
If in doubt, contact your local waste disposal authorities.
Thank you for choosing Velleman! Please read the manual thoroughly before
bringing this device into service. If the device was damaged in transit, do
not install or use it and contact your dealer.
2. Used Symbols
AC (Alternating Current)
DC (Direct Current)
Both AC and DC
Risk of Electric shock. A potentially hazardous voltage is
possible.
Caution: risk of danger, refer to the user manual for safety
information.
Warning: a hazardous condition or action that may result in
injury or death
Caution: condition or action that may result in damage to the
meter or equipment under test
Double insulation (class 2-protection)
Earth
Fuse
Capacitor
Diode
Continuity

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3. General Guidelines
Refer to the Velleman®Service and Quality Warranty on the last pages of
this manual.
This symbol indicates: Read instructions
Not reading the instructions and manual can lead to damage,
injury or death.
This symbol indicates: Danger
A hazardous condition or action that may result in injury or death
This symbol indicates: Risk of danger/damage
Risk of a hazardous condition or action that may result in
damage, injury or death
This symbol indicates: Attention; important information
Ignoring this information can lead to hazardous situations.
WARNING: To avoid electrical shock always disconnect the test
leads prior to opening the housing. To prevent fire hazards, only
use fuses with the same ratings as specified in this manual.
Remark: refer to the warning on the battery compartment
Avoid cold, heat and large temperature fluctuations. When the
unit is moved from a cold to a warm location, leave it switched
off until it has reached room temperature. This to avoid
condensation and measuring errors.
Protect this device from shocks and abuse. Avoid brute force
when operating.
Pollution degree 2-device. For indoor use only. Keep this device
away from rain, moisture, splashing and dripping liquids. Not for
industrial use. Refer to §8 Pollution degree.
Keep the device away from children and unauthorised users.
Risk of electric shock during operation. Be very careful when
measuring live circuits.
There are no user-serviceable parts inside the device.
Refer to an authorized dealer for service and/or spare parts.

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This is an installation category CAT III measuring
instrument. Refer to §7 Overvoltage/installation category.
Read this addendum and the manual thoroughly. Familiarise
yourself with the functions of the device before actually using it.
All modifications of the device are forbidden for safety reasons.
Damage caused by user modifications to the device is not
covered by the warranty.
Only use the device for its intended purpose. Using the device in
an unauthorized way will void the warranty. Damage caused by
disregard of certain guidelines in this manual is not covered by
the warranty and the dealer will not accept responsibility for any
ensuing defects or problems.
Application around and removal from UNINSULATED HAZARDOUS
LIVE conductors is permitted.
The current sensor must not be used on UNINSULATED
conductors.
4. Maintenance
There are no user-serviceable parts inside the device.
Refer to an authorized dealer for service and/or spare parts.
Before performing any maintenance activities, disconnect the test leads
from the jacks.
For instructions on replacing battery or fuse, refer to §11 Battery and fuse
replacement.
Do not apply abrasives or solvents to the meter. Use a damp cloth and mild
detergent for cleaning purposes.
5. During Use
Risk of electric shock during operation. Be very careful when
measuring live circuits.
•Never exceed the limit value for protection. This limit value is listed
separately in the specifications for each range of measurement.
•Do not touch unused terminals when the meter is linked to a circuit,
which is being tested.
•Never use the meter with CAT III installations when measuring voltages
that might exceed the safety margin of 600 V above earth ground.
•Set the range selector at its highest position if the intensity of the
charge to be measured is unknown beforehand.

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•Disconnect the test leads from the tested circuit before rotating the
range selector in order to change functions.
•When carrying out measurements on a TV set or switching power
circuits, always remember that the meter may be damaged by any high
amplitude voltage pulses at test points.
•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.
•Always hold the device behind the finger guard (see General
Description, nr. 12).
•Comply with the local and national safety regulations. Use personal
protective equipment, such as approved rubber gloves, face protection
and flame-resistant clothing, to prevent shock and arc blast injury
where hazardous live conductors are exposed.
•Do not use this device to measure a current with a frequency
above 1 kHz.
•Only use this device as specified in this manual in order not to
compromise the protection supplied by the device.
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.

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The existing categories according EN 61010-1 are:
CAT I
A CAT I-rated meter is suitable for measurements on protected
electronic circuits that are not directly connected to mains power, e.g.
electronics circuits, control signals…
CAT
II
A CAT II-rated meter is suitable for measurements in CAT I-
environments and mono-phase appliances that are connected to the
mains by means of a plug and circuits in a normal domestic
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…
CAT
III
A CAT III-rated meter is suitable for measurements in CAT I- and
CAT II-environments, as well as for measurements on (fixed) mono-
or poly-phased appliances which are at least 10 m apart from of a
CAT IV-environment, and for measurements in or on distribution level
equipment (fuse boxes, lighting circuits, electric ovens).
CAT
IV
A CAT IV-rated meter is suitable for measuring in CAT I-, CAT II- and
CAT III-environments as well as on the primary supply level.
Note that for all measurements on equipment for which the supply
cables run outdoors (either overhead or underground) a CAT IV
meter must be used.
Warning:
This device was designed in accordance with EN 61010-1 installation
category CAT III 600 V. This implies that certain restrictions in use apply
that are related to voltages and voltage peaks which can occur within the
environment of use. Refer to the table above.
This device is only suitable for measurements up to 600 V in
CAT III
8. Pollution Degree
IEC 61010-1 specifies different types of pollution environments, for which
different protective measures are necessary to ensure safety. Harsher
environments require more protection, and the protection against the
pollution which is to be found in a certain environment depends mainly on
the insulation and the enclosure properties. The pollution degree rating of
the DVM indicates in which environment the device may be used.
Pollution
degree 1
No pollution or only dry, nonconductive pollution occurs. The
pollution has no influence. (only to be found in hermetically
sealed enclosures)
Pollution
degree 2
Only nonconductive pollution occurs. Occasionally, temporary
conductivity caused by condensation is to be expected.(home
and office environments fall under this category)

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Pollution
degree 3
Conductive pollution occurs, or dry nonconductive pollution
occurs that becomes conductive due to condensation that is
to be expected. (industrial environments and environments
exposed to outside air - but not in contact with precipitation)
Pollution
degree 4
The pollution generates persistent conductivity caused by
conductive dust or by rain or snow. (exposed outdoor
environments and environments where high humidity levels
or high concentrations of fine particles occur)
Warning: This device was designed in accordance with EN 61010-1
pollution degree 2. This implies that certain restrictions in use apply that
are related to pollution which can occur within the environment of use. Refer
to the table above.
This device is only suitable for measurements in Pollution
degree class 2 environments.
9. Specifications
This device is not calibrated when purchased!
Regulations concerning environment of use:
Use this meter only for measurements in CAT I, CAT II and CAT III
environments (see §7).
Use this meter only in a pollution degree 2 environment (see §8).
Ideal working conditions include:
temperature: 0 °C to 40 °C (32 °F to 104 °F)
relative humidity: max. 80 %
altitude: max. 2000 m (6560 ft)
IP rating ........................................................................... IP20
voltage ........................................................................... 600 V
power supply ....................................... 3 x 1.5 V AAA/LR03 (incl.)
display............................................................ LCD, 1999 counts
display dimensions ...................................................24 x 37 mm
over-range ..........................................................................yes
continuity buzzer..................................................................yes
diode test............................................................................yes
low-battery indication ...........................................................yes
ranging mode ......................................................... auto/manual
data hold ............................................................................yes
backlight .............................................................................yes
auto power-off .....................................................................yes
dimensions..................................................... 194 x 72 x 35 mm
weight (with battery) .........................................................230 g
storage environment
temperature ................................................. -20 °C to 60 °C
humidity ............................................................ < 90 % RH
test lead probe....... CAT III 1000 V / CAT IV 600 V, 10 A; L = 84 cm

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9.1 AC VOLTAGE
Do not measure circuits that may contain voltages
> 600 V AC or DC
range
resolution
accuracy
2 V
0.001 V
± (1.0 % + 5)
20 V
0.01 V
200 V
0.1 V
600 V
1 V
± (1.2 % + 5)
Impedance: 10 MΩ, max. input voltage: 600 V DC or AC rms
Frequency range: TRMS 40 Hz-1000 Hz
9.2 DC VOLTAGE
Do not measure circuits that may contain voltages
> 600 V AC or DC
range
resolution
accuracy
200 mV
0.1 mV
± (0.5 % + 3)
2 V
0.001 V
± (0.8 % + 5)
20 V
0.01 V
200 V
0.1 V
600 V
1 V
± (1.0 % + 5)
Impedance: 10 MΩ, max. input voltage: 600 V DC or AC rms
9.3 AC CURRENT
Do not measure circuits that may contain voltages
> 600 V AC or DC
range
resolution
accuracy
2 A
0.001 A
± (2.5 % + 10)
20 A
0.01 A
200 A
0.1 A
600 A
1 A
Frequency range: TRMS 40 Hz-1000 Hz

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9.4 RESISTANCE
Do not conduct resistance measurements on live circuits
range
resolution
accuracy
200 Ω
0.1 Ω
± (1.0 % + 10)
2 kΩ
0.001 kΩ
± (0.8 % + 5)
20 kΩ
0.01 kΩ
200 kΩ
0.1 kΩ
2 MΩ
0.001 MΩ
20 MΩ
0.01 MΩ
± (2.0 % + 10)
Overload protection: 250 V DC or AC rms
9.5 DIODE + AUDIBLE CONTINUITY
Do not conduct diode and continuity measurements on
live circuits
range
function
displays approx. forward voltage of the diode, reverse
shows OL
built-in buzzer sounds if resistance < 30 Ω
Overload protection: 250 V DC or AC rms
9.6 TEMPERATURE
range
-20 °C - 1000 °C
resolution
1 °C
accuracy
-20 °C - 0 °C
± (5.0 % + 4)
0 °C - 400 °C
± (2.0 % + 3)
400 °C - 1000 °C
± (3.0 % + 3)
range
0 °F - 1800 °F
resolution
1 °F
accuracy
0 °F - 50 °F
± (5.0 % + 4)
50 °F - 750 °F
± (2.0 % + 3)
750 °F - 1800 °F
± (3.0 % + 3)
Overload protection: 250 V DC or AC rms