Velleman DVM851 User manual

DVM851
3 ½ DMM
3 ½-DIGIT DMM
MULTIMÈTRE NUMÉRIQUE LCD 3 ½
MULTÍMETRO 3 ½ DÍGITOS
3 ½-STELLIGES MULTIMETER
CYFROWY MULTIMIERNIK 3 ½
DMM 3 ½
USER MANUAL 3
GEBRUIKERSHANDLEIDING 15
MODE D’EMPLOI 28
MANUAL DEL USUARIO 41
BEDIENUNGSANLEITUNG 54
INSTRUKCJA OBSŁUGI 68
MANUAL DO UTILIZADOR 82

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USER MANUAL
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.
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

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Continuity
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.

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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.
This is an installation category CAT 2 measuring
instrument. Never use this equipment in a CAT 3 or CAT 4
environment. 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.
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.
During Use
Risk of electric shock during operation. Be very careful
when measuring live circuits.

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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 2 installations when measuring
voltages that might exceed the safety margin of 600V 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.
Always be careful when working with voltages above 60Vdc or 30Vac
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.
General Description
The DVM851 is a battery-operated, hand-held 3 ½ digital multi-meter
for measuring DC and AC voltages, DC current and resistance. It also
offers the possibility of executing continuity tests and of testing diodes
and transistors. The back light is optional.
Refer to the illustration on page 2 of this manual:
Display
3 ½ digits, 7 segments, LCD: 15mm high
Back light
When this button is pushed, the backlight will illuminate your
display for approximately 5 seconds.
Rotary switch
This switch is used to select functions and desired ranges as well
as to turn the meter on/off.
Hold button
Upon pushing this button, the display will retain the last reading
and the " "-symbol will remain on the LCD until the button is
pushed again.

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"10A" jack
Insert the red test lead in this connector in order to measure a
max. current of 10A.
"COM" jack
Insert the black (negative) test lead.
"VmA" jack
Insert the red (positive) test lead in this connector to measure
voltage, resistance and current (except 10A).
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
1
A CAT 1-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
2
A CAT 2-rated meter is suitable for measurements in CAT 1-
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 10m
apart from a CAT 3- or 20m apart from a CAT 4-environment.
E.g. household appliances, portable tools…
CAT
3
A CAT 3-rated meter is suitable for measurements in CAT 1-
and CAT 2-environments, as well as for measurements on
(fixed) mono- or poly-phased appliances which are at least 10m
apart from of a CAT 4-environment, and for measurements in
or on distribution level equipment (fuse boxes, lighting circuits,
electric ovens).
CAT
4
A CAT 4-rated meter is suitable for measuring in CAT 1-, CAT 2-
and CAT 3-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 4 meter must be used.
Warning:
This device was designed in accordance with EN 61010-1 installation
category CAT 2 600V. This implies that certain restrictions in use apply

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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 600V in
CAT 2
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.

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Specifications
This device is not calibrated when purchased!
Regulations concerning environment of use:
Use this meter only for measurements in CAT 1 and CAT 2
environments (see §7)
Use this meter only in a pollution degree 2 environment (see §8)
Ideal working conditions include:
temperature: 18 to 28°C (64°F to 82°F)
relative humidity: max. 80%
altitude: max. 2000m (6560ft)
Voltage
max. 600V
Fuse protection
F 500mA/600V, F10A/600V
Power
9V alkaline battery 6LR61
Display
LCD, 1999 counts
sampling rate
2-3/sec.
Measuring method
Dual-slope integration A/D
converter
Overrange indication
Only figure "1" on the display
Polarity indication
"-" displayed for negative
polarity
Operating temperature
0 to 40°C
Storage temperature
-10°C to 50°C
Low battery indication
appears on the display
Dimensions
138 x 69 x 31mm
Weight
Approx. 142g
9.1 DC VOLTAGE
Do not measure circuits that may contain voltages > 600V
Range
Resolution
Accuracy
200mV
100µV
0.5% of rdg 2 digits
2V
1mV
0.8% of rdg 2 digits
20V
10mV
200V
100mV
600V
1V
1.0% of rdg 2 digits

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9.2 DC CURRENT
Do not measure current in circuits with voltages > 600V
Range
Resolution
Accuracy
200µA
0.1µA
1% of rdg 2 digits
2mA
1µA
20mA
10µA
200mA
100µA
1.5% of rdg 2 digits
10A
10mA
3% of rdg 2 digits
Overload protection by fuse: 200mA range F 500mA/600V, 10A range
F10A/600V.
9.3 AC VOLTAGE
Do not measure circuits that may contain voltages > 600V
Range
Resolution
Accuracy
200V
100mV
1.2% of rdg 10 digits
600V
1V
Frequency range: 40Hz to 400Hz.
9.4 DIODE & CONTINUITY
Do not conduct diode- or continuity measurements on live
circuits.
Range
Description
If continuity exists (less than 60), built-in buzzer will sound
Displays the diode's approx. forward voltage drop
9.5 RESISTANCE
Do not conduct resistance measurements on live circuits.
Range
Resolution
Accuracy
200
0.1
0.8% of rdg 2 digits
2k
1
20k
10
200k
100
2M
1k
1.0% of rdg 2 digits
Maximum open circuit voltage: 3.2V