Velleman DVM894 User manual

DVM894
DIGITAL MULTIMETER 3½ DIGITS –32 RANGES
DIGITALE MULTIMETER 3½-DIGITS –32 BEREIKEN
MULTIMÈTRE NUMÉRIQUE 3½-DIGITS –32 GAMMES
MULTÍMETRO DIGITAL DE 3½ –32 RANGO
3½-STELLIGES MULTIMETER –32 BEREICHE
MULTIMETR CYFROWY LCD 3½ - 32 OPCJE
3½ DMM - 32 NÍVEIS
USER MANUAL 3
GEBRUIKERSHANDLEIDING 17
MODE D'EMPLOI 32
MANUAL DEL USUARIO 47
BEDIENUNGSANLEITUNG 61
INSTRUKCJA OBSŁUGI 76
MANUAL DO UTILIZADOR 92

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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.
Refer to the Velleman® Service and Quality Warranty on the last pages of this
manual.
2. Used Symbols
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.
AC (Alternating Current)
DC (Direct Current)
Both AC and DC
Double insulation (class 2-protection)
Earth
Fuse
Capacitor
Diode
Continuity

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3. Safety Instructions
Read this manual thoroughly. Familiarise yourself with the functions of
the device before actually using it.
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.
WARNING: To avoid electrical shock always disconnect the test leads
prior to opening the housing. To prevent damage or injury, only use
batteries and fuses of the same type and ratings as specified in this
manual.
Remark: Refer to the warning on the back of the meter.
Keep the device away from children and unauthorised users.
Protect this device from shocks and abuse. Avoid brute force when
operating.
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.
This is an installation category CAT III 600V measuring
instrument. Never use this equipment in a higher category than
indicated. Refer to §4 Overvoltage/installation category.
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 §5 Pollution degree.
For your safety, use only the test leads supplied with the instrument.
Before use, check that they are in good condition. Do not use the meter
or test leads if they look damaged. When damaged, replace them with
test leads of the same type and with the same specifications.
Always place your fingers behind the protective edges of the test probes
while measuring!
Never touch free terminals when the meter is connected to a circuit.
Use the correct input terminals, function, and range for your
measurements. When the range of the value to be measured is unknown,
check that the range initially set on the meter is the highest possible.
To avoid damages to the instrument, do not exceed the maximum limits
of the input values as shown in the technical specifications tables.
Risk of electric shock during operation. Be very careful when
measuring live circuits. Use extreme caution when measuring voltages
higher than 60 VDC or 30 VAC rms.

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When using the mA terminal: do not measure current in circuits with
voltages > 250 V.
When using the 10A terminal: do not measure current in circuits with
voltages > 500 V.
Disconnect circuit power and discharge all high-voltage capacitors before
testing resistance, continuity, capacitance or diodes. For transistor tests,
use the included transistor socket.
In TV repair work or when carrying out measurements on power switching
circuits, remember that high-amplitude voltage pulses at the test points
can damage the meter. Use of a TV filter will attenuate any such pulses.
Do not replace internal parts yourself. Replace damaged or lost
accessories by identical ones with the same specifications. Order spare
accessories, e.g. test leads, from your dealer.
Switch off the meter and remove test probes prior to replacing the
battery or fuses.
All modifications of the device are forbidden for safety reasons. Damage
caused by user modifications to the device is not covered by the
warranty.
If the meter is used near a source of electromagnetic interference, the display
may become unstable or may indicate large errors.
Use the meter only as specified in this manual; otherwise, the protection
provided by the meter may be impaired.
Use extreme caution when working around bare conductors or bus bars.
Do not operate the meter near explosive gases, vapour, or dust.
Verify the meter’s operation by measuring a known voltage. Do not use the
meter if it operates abnormally. Protection may be impaired. When in doubt,
have the meter serviced by a qualified technician. Make sure the device cannot
be used until it is repaired.
When making connections, connect the common test lead (black) before
connecting the live test lead (red). When disconnecting, disconnect the live test
lead (red) before disconnecting the common test lead (black).
Before changing functions or measuring range, disconnect the test leads from
the circuit under test.
For all DC functions, to avoid the risk of shock due to possible improper
readings, verify the presence of any AC voltages first by using the AC function.
Then select a DC voltage range equal to or greater than the AC range.
Use a 9 V battery, properly installed in the meter’s battery case, to power the meter.
Replace the battery as soon as the battery indicator appears. With a low
battery, the meter may produce false readings that can lead to electric shock
and personal injury.
Do not operate the meter with the case (or part of the case) removed.
Always verify that all connections are reliable and safe.
Avoid body contact with ground potential (e.g. metallic terminals, output
sockets, lead clamp…) while measuring. Make sure to be electrically insulated
from ground during measurement.

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4. 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 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 600V. 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 suitable for measurements up to 600 V:
measurements in/on low-voltage distribution boards (distribution boards behind
meter box)
measurements on (fixed) mono- or poly-phased appliances and circuits except
in CAT IV environments (e.g. mains outlets, electric ovens, lighting circuits, bus
bars, low-voltage distribution boards and circuit breakers).
This device is NOT suitable for:
Voltages above 1000 V
Measurements on distribution equipment and outdoor installations including
meter boxes and equipment/circuits outside or remote from the domestic
environment e.g. circuits in sheds, garden houses and free-standing garages, or
circuits using underground wiring e.g. garden lighting, pool-pump…
THIS DEVICE IS ONLY SUITABLE FOR MEASUREMENTS UP TO 600 V IN
CAT III.

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5. 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 DMM 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.
6. Overview
Refer to the illustrations on page 2of this manual.
1
LCD display: 3 ½ digits, 2000 counts
2
power button
3
HOLD: to hold the last reading
4
rotary switch: to select functions and the desired ranges
5
input sockets
Display
low battery
Warning: To avoid false readings, which can possibly
lead to electric shocks or personal injury, replace the
battery as soon as the battery indicator appears.
negative input polarity indication
HV
high-voltage symbol (600 VAC or 600 VDC)
HOLD
data-hold mode

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Input socket
COM
common inut terminal
V, Ω, Hz
TEMP
input terminal for all other measurements
mA
hFE
input terminal for transistor, capacitance, and current
measurements
10A
input terminal for currents between 200 mA and 10 A
7. Use
7.1 Preparation
1. Switch on the meter by turning the rotary switch. If the battery voltage is
lower than 7 V, the low-battery symbol will appear and the batteries should
be replaced.
2. The warning symbol next to the input lead shows that the input voltage or
current should not exceed the specified value in order to protect the internal
circuit from damage.
3. Turn the rotary switch to the required function and range to be measured.
4. Choose the highest range when the value to be measured is unknown.
5. When making connection, connect the common test lead first and then the
powered test lead.
6. Remove the charged test lead first when disconnecting.
7.2 Readings Hold
1. Press HOLD to hold the reading of the current measurements.
2. Press HOLD again to release the reading.
7.3 AC/DC Voltage Measurement
USE CAUTION WHEN MEASURING HIGH-VOLTAGE CIRCUITS TO AVOID
ELECTRICAL SHOCK AND INJURY. DO NOT TEST VOLTAGES HIGHER THAN
600 V AC/DC.
1. Plug the black test lead into the COM jack and the red test lead into the
VTempΩ Hz jack.
2. Set the rotary switch to the V position for DC measurement and V for AC
measurement. Select the proper range.
3. Connect the test leads to the voltage source or load for measurement.
4. Read the value on the main indicator of the LCD. The polarity symbol denotes
the polarity of the end connected by the red test lead.

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Notes
At small voltage ranges, unsteady readings will appear before the test leads
make contact with the circuit. This is normal since the meter is highly sensitive.
When the test leads are connected to the circuit, the tru readings will be shown.
When 1 appears on the LCD, it means the measurement has exceeded the
allowable range. A higher range should be selected.
When the scale of the value to be measured is unknown, select the highest
range first and lower the range accordingly.
7.4 AC/DC Current Measurement
USE CAUTION WHEN MEASURING HIGH-VOLTAGE CIRCUITS TO AVOID
ELECTRICAL SHOCK AND INJURY. DO NOT TEST VOLTAGES HIGHER THAN
600 V AC/DC.
TO AVOID ELECTRICAL SHOCK AND INJURY, POWER OFF THE CIRCUIT AND
DISCHARGE THE CAPACITORS BEFORE MEASURING CURRENT.
1. Plug the black test lead into the COM jack.
2. When the current to be measured is under 200 mA, plug the red test lead into
the mA jack. When the current to be measured is between 200 mA and 10 A,
plug the red test lead into the 10A jack.
3. Set the rotary switch to the A position for DC measurement and A for AC
measurement. Select the proper range.
4. Connect the test leads to the circuit.
5. Read the value on the display.
6. The polarity symbol denotes the polarity of the red test lead.
Notes
When 1 appears on the LCD, it means the measurement has exceeded the
allowable range. A higher range should be selected.
When the scale of the value to be measured is unknown, select the highest
range first and lower the range accordingly.
The warning symbol indicates that the maximum current of the mA jack is
200 mA and the maximum current of the 10A jack is 10 A. At either jack,
current exceeding the limit will blow the fuse.
7.5 Resistance Measurement
TO AVOID ELECTRICAL SHOCK AND INJURY, POWER OFF THE CIRCUIT AND
DISCHARGE THE CAPACITORS BEFORE MEASURING RESISTANCE.
1. Plug the black test lead into the COM jack and the red test lead into the
VTempΩ Hz jack.
2. Set the rotary switch to the Ω position and select the proper range.
3. Connect the test leads to the ends of the resistor or circuit.
4. Read the value on the LCD.

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Notes
When the input is open, 1 is displayed on the LCD to indicate overload. For
measuring resistance above 1 MΩ, it may take a few seconds to get a steady
reading. This is normal for high-resistance measurement.
7.6 Diode
1. Plug the black test lead into the COM jack and the red test lead into the
VTempΩ Hz jack.
2. Set the rotary switch to the position.
3. Connect the red test lead to the anode and the black test lead to the cathode
of the diode for testing.
4. Read the value on the LCD.
Notes
The meter will show the approximate forward voltage drop of the diode.
When the test leads are reversed or opened, 1 will appear on the LCD.
7.7 Continuity
TO AVOID ELECTRICAL SHOCK AND INJURY, POWER OFF THE CIRCUIT AND
DISCHARGE THE CAPACITORS BEFORE MEASURING CONTINUITY.
1. Plug the black test lead into the COM jack and the red test lead into the
VTempΩ Hz jack.
2. Set the rotary switch to the position.
3. Connect the test leads to two ends of the circuit. If resistance of the circuit is
less than 50 Ω, the built-in buzzer will sound.
7.8 Capacitance
TO AVOID ELECTRICAL SHOCK AND INJURY, POWER OFF THE CIRCUIT AND
DISCHARGE THE CAPACITORS BEFORE MEASURING CAPACITANCE.
1. Plug the black test lead into the COM jack and the red test lead into the
hFE mA jack.
2. Set the rotary switch to the position and select the proper range.
3. Connect the test leads to two ends of the circuit/capacitor and read the value
on the LCD.
7.9 Frequency Measurement
1. Plug the black test lead into the COM jack and the red test lead into the
VTempΩ Hz jack.
2. Set the rotary switch to the Hz position.
3. Connect the test leads to two ends of the circuit and read the value on the
LCD.