Velleman DVM856 User manual

DVM856
CAT III 300 V / CAT II 500 V
USER MANUAL 3
HANDLEIDING 14
MODE D'EMPLOI 26
MANUAL DEL USUARIO 38
BEDIENUNGSANLEITUNG 49
INSTRUKCJA OBSŁUGI 61
MANUAL DO UTILIZADOR 74

DVM856
V. 01 –06/08/2018 2 ©Velleman nv

DVM856
V. 01 –06/08/2018 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

DVM856
V. 01 –06/08/2018 4 ©Velleman nv
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.

DVM856
V. 01 –06/08/2018 5 ©Velleman nv
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.
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 II installations when measuring voltages
that might exceed the safety margin of 500 V above earth ground.
Never use the meter with CAT III installations when measuring voltages
that might exceed the safety margin of 300 V above earth ground.
Set the range selector at its highest position if the intensity of the
charge to be measured is unknown beforehand.
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.

DVM856
V. 01 –06/08/2018 6 ©Velleman nv
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. Display
3 ½ digits
2. Hold button
3. Backlight button
4. Selection button
5. “VmA”jack
Insert the red (positive) test lead in this connector to measure voltage,
resistance and current.
6. “COM” jack
Insert the black (negative) test lead.
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:
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).

DVM856
V. 01 –06/08/2018 7 ©Velleman nv
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 II 500 V and CAT III 300 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 500 V in CAT II
and up to 300 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)
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.

DVM856
V. 01 –06/08/2018 8 ©Velleman nv
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 %
accuracy: ± (a% reading + b digit)
voltage ........................................................................... 500 V
fuse protection
F0.5 A/500 V, 5 x 20 mm
power supply .........................................2 x 1.5 V AAA/R03 (incl.)
display............................................................ LCD, 1999 counts
over-range ..........................................................................yes
continuity buzzer..................................................................yes
diode test............................................................................yes
low-battery indication ...........................................................yes
ranging mode ................................................................ manual
data hold ............................................................................yes
backlight.............................................................................yes
auto power-off .....................................................................yes
dimensions..................................................... 134 x 75 x 25 mm
weight (with battery) .........................................................110 g
storage environment
temperature ................................................. -20 °C to 60 °C
humidity ............................................................ < 90 % RH
test lead probe...................... RE10, CAT II 500 V, 10 A; L = 90 cm
9.1 DC VOLTAGE
Do not measure circuits that may contain voltages
> 500 VDC or > 500 VAC
range
resolution
accuracy
200 mV
0.1 mV
± (1.0 % rdg + 2 digits)
2 V
1 mV
20 V
10 mV
200 V
100 mV
500 V
1 V
± (1.2 % rdg + 2 digits)
Overload protection: 500 V DC or AC rms
Impedance: 1 MΩ

DVM856
V. 01 –06/08/2018 9 ©Velleman nv
9.2 AC VOLTAGE
Do not measure circuits that may contain voltages
> 500 VDC or > 500 VAC
range
resolution
accuracy
200 V
100 mV
± (1.5 % rdg + 3 digits)
500 V
1 V
Average sensing, calibrated to rms of sine wave
Frequency range: 40 Hz-500 Hz
Overload protection: 500 V DC or AC rms
Impedance: 450 kΩ
9.3 DC CURRENT
Do not measure circuits that may contain voltages
> 600 VDC or > 600 VAC
range
resolution
accuracy
200 µA
0.1 µA
± (1.5 % rdg + 2 digits)
2 mA
1 µA
20 mA
10 µA
200 mA
100 µA
± (2.0 % rdg + 3 digits)
Overload protection: F0.5 A/500 V fuse
9.4 RESISTANCE
Do not conduct resistance measurements on live
circuits
range
resolution
accuracy
200 Ω
0.1 Ω
± (1.0 % rdg + 5 digits)
2 kΩ
1 Ω
± (1.0 % rdg + 3 digits)
20 kΩ
10 Ω
200 kΩ
100 Ω
2 MΩ
1 kΩ
± (1.5 % rdg + 3 digits)
Overload protection: F0.5 A/500 V fuse

DVM856
V. 01 –06/08/2018 10 ©Velleman nv
9.5 DIODE AND CONTINUITY
Do not conduct diode or continuity measurements on
live circuits
range
description
test condition
display reads the
approximate forward
voltage of the diode
forward DC current ± 10 µA
reversed DC voltage ± 1.8 V
built-in buzzer sounds
if resistance < 50 Ω
open-circuit voltage ± 1.8 V
Overload protection: F0.5 A/500 V fuse
9.6 NON-CONTACT AC VOLTAGE DETECTION
Test voltage range: 90 V-1000 V AC rms
The built-in buzzer will sound when live voltage is detected.
10. Operation
10.1 DC VOLTAGE MEASUREMENT
Do not measure circuits that may contain voltages > 500 VDC or
> 500 VAC
Use extreme caution when measuring voltages higher than 60 VDC
or 30 VAC rms.
Always place your fingers behind the protective edges of the test
probes while measuring!
1. Set the rotary switch in the desired “ ” position.
2. Connect the red test lead to the “VmA”jack and the black lead to the
“COM” jack.
3. Connect the test leads to the source being measured.
4. Read the voltage value and the polarity of the red test lead on the LCD
display.
Notes
If the range is not known beforehand, set the selector switch to a high
range and lower gradually.
An over-range is indicated by 1 or -1. Set to a higher range.
The maximum input current is 500 V rms.