Emos MD-230 User manual

2202020000_31-M0230_00_01 74 × 105 mm
M0230
GB Digital Multimeter
CZ Digitální multimetr
SK Digitálny multimeter
PL Multimetr cyfrowy
HU Digitális multiméter
SI Digitalni multimeter
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DE Digitales Multimeter
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www.emos.eu

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MAX
INPUTCOM
FUSED
MAX
FUSED
500mA
10A
10SEC
EACH 15MIN
MAX
600V
A
H
Select
OFF
200
10
200m
1.5V
9V
200
2
20
2M
200k
20k
2k
600
200
600
TEMP
BATT
V
V
A
EN61010- 1
CAT III 600V
°C°F
TRUE RMS
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GB | Digital Multimeter
Read this instruction manual thoroughly before you begin using
the M0230. It contains particularly important passages concerning
occupational safety principles when using the device. Such passages
are highlighted. Reading the manual will prevent potential injury by
electric current or damage to the device.
The multimeter was designed in accordance with standard EN
61010-1, applying to electronic measuring instruments belonging
to category CAT III 600 V, pollution degree 2. CAT III is intended for
measuring circuits powered by xed wiring installations, such as
relays, sockets, distribution boxes, feeder lines and short branching
circuits and lighting systems in large buildings.
Do not use the multimeter to measure ranges that fall into the
category IV!
Warning:
Use the M0230 multimeter only in the manner specied below. Other
uses may cause damage to the device or endanger your health.
Comply with the following instructions:
• Before measuring resistance, diodes or current, disconnect the
circuits from the power supply and discharge any high-voltage
capacitors. Use a function appropriate for the given measure-
ment. Before changing the range (or switching functions) dis-
connect the conductors from the circuit that is being measured.
• Make sure the device is undamaged before you begin using the
multimeter. If you nd obvious signs of damage on the body of
the device, do not make any measurements! Check that the
surface of the multimeter does not have scratches and that the
side joints are not coming apart.
• Also check the insulation on the measuring probes. Damaged
insulation may result in injury by electric current. Do not use
damaged measuring probes!
• Do not measure voltages above 600 V! If you intend to measure
current, check the multimeter‘s fuse and turn o the power
supply to the circuit before you connect the multimeter. Before

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measuring, make sure the circular switch for setting measuring
range is in the correct position. Under no circumstances should
you make any changes to the measuring range (by moving the
circular switch for changing measuring programmes) while
measuring! Doing so could damage the device. When you are
measuring, rst connect the black conductor (probe) and then
the red conductor (probe). When disconnecting the testing
conductors, disconnect the red one rst.
• If you nd that the multimeter is making abnormal measure-
ments, stop using it. The fuse may be damaged. If you are unsure
of the cause of the defect, contact a service centre.
• Do not measure voltages higher than listed on the front panel
of the multimeter. Risk of injury by electric current or damage
to the multimeter!
• Check that the multimeter is working properly before use. Test
on a circuit with known electrical values.
• Before you connect the multimeter to a circuit you intend to
measure, turn o the power to the circuit.
• Do not use or store the multimeter in environments with high
temperature, dust or humidity. It is also not recommended to
use the device in environments with potentially strong magnetic
elds or risk of explosion or re.
• When changing parts of the multimeter (e.g. the battery or fuse)
use spare parts of the same type and specications. Change
parts only when the multimeter is disconnected and turned o.
• Disconnect the testing conductors from the tested circuit before
opening the rear casing of the device.
• Do not alter or otherwise interfere with the internal circuitry
of the multimeter!
• Be extra careful when measuring voltages higher than 30 V AC
rms, 42 V peak or 60 V DC. Risk of injury by electric current!
• When using measuring tips, make sure you are holding them
behind the nger barriers.
• Do not perform measurements if the multimeter‘s casing is
removed or loose.

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• Once the screen shows the low battery icon , replace the
batteries. Otherwise, subsequent measurements may be in-
accurate. Incorrect measurements may then result in injuries
by electric current! Use alkaline batteries only; do not use
re-chargeable batteries.
Maintenance Instructions
Attention
Do not attempt to repair or modify the multimeter in any way if you
are not qualied to do so or do not have access to the necessary
calibration equipment. Make sure that water does not get into the
multimeter – prevents injury by electric current!
• Disconnect the measuring tips from the tested circuit before
opening the casing of the multimeter.
• Regularly clean the body of the multimeter with a moist cloth and
a mild detergent. Perform cleaning only when the multimeter is
disconnected and turned o.
• Do not use solvents or abrasive agents for cleaning!
• If you will not be using the multimeter for an extended period
of time, turn it o and remove the battery.
• Do not store the multimeter in places with high humidity and
temperature or in environments with strong magnetic elds!
Changing Batteries
When the symbol appears on the screen, it indicates the bat-
teries are close to depletion and must be immediately replaced. To
replace the batteries, unfasten the screw at the rear of the casing
and remove the casing. Replace the at batteries with new ones of
the same type (1.5 V, AAA) and make sure to observe the correct
polarity. Replace the rear casing.
Electrical Symbols
Alternating current (AC)
Direct current (DC)
Alternating and direct current (AC/DC)
Warning symbol, hazard. Pay particular attention to sections of
the manual marked with this symbol.
Risk of injury by electric current

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Fuse
Earthing
Double insulation
The product complies with applicable EU standards
Batteries low
Continuity test
°C Celsius temperature unit
°F Fahrenheit temperature unit
Automatic switch-o (15 minutes)
Data hold
Description of the Device (see Fig. 1)
The M0230 is a compact, 3 ½ digit, digital multimeter with manual
range adjustment for measuring DC and AC voltage, DC and AC
current, resistance and temperature, and for testing continuity
and diodes.
1 – protective casing
2 – screen
3 – select button
4 – hold button
5 – circular switch for changing measuring range/choosing a
function
6 – INPUT socket – for the plug at the end of the red (positive)
tipped measuring conductor for measuring voltage, resistance,
diodes, continuity, temperature and current up to 200 mA
7 – COM socket – for the plug at the end of the black (negative)
tipped measuring conductor
8 – 10 A socket – for the plug at the end of the red (positive) tipped
measuring conductor for measuring current in a current range
of 10 A AC/DC
9 – removing the probe cover
Technical Information
Screen: 3 ½ digit LCD with a maximum displayable value of 1,999
Negative polarity indication: the screen automatically displays „-“
Overload indication: the screen displays „OL“
Reading frequency: approx. 2× a second

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Temperature measurement range: -40°C to 1,370°C
(-40°C to 300°C with the enclosed thermocouple)
Power supply: 3× 1.5 V AAA batteries
Operating temperature: 0°C to 40°C, relative humidity < 80%
Storage temperature: -10°C to 50°C, relative humidity < 85%
Dimensions: 155 × 75 × 35 mm
Weight: 232 g including battery
Measurement Accuracy
Accuracy is specied for the duration of one year after calibration
and at a temperature of 23°C (±5°C) and air humidity up to 80%.
Accuracy specications are:
±[(% of reading) + (lowest valid digits)]
DC Voltage
Range Resolution Accuracy
2 V 1 mV
±(0.8% + 5)20 V 10 mV
200 V 100 mV
600 V 1 V ±(1% + 5)
Overload protection: 600 V DC or 600 V rms
AC Voltage
Range Resolution Accuracy
200 V 100 mV ±(1.2% + 8)
600 V 1 V
Frequency range: 40 Hz to 400 Hz
Maximum input voltage: 600 V AC or 600 V rms
Response: True RMS, corresponding to a calibrated eective value
of a sine wave.
Direct Current (DC)
Range Resolution Accuracy
200 mA 100 µA
±(1.2% + 8)2 A 1 mA
10 A 10 mA

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Overload protection:
200 mA range: 500 mA/600 V fuse, type F, Ø 5 × 20 mm.
2 A and 10 A range: 10 A/600 V fuse, type F, Ø 5 × 20 mm.
Maximum input current: INPUT socket max. 200 mA; A socket
max. 10 A (when measuring current above 5 A; the measurement
duration must be max. 10 seconds and further measurement may
only be made after 15 minutes)
Voltage drop: 200 mV for 200 mA/10 A range, 20 mV for 2 A range
Alternating Current (AC)
Range Resolution Accuracy
200 mA 100 µA ±(1.5% + 10)
2 A 1 mA ±(2% + 10)
10 A 10 mA
Overload protection:
200 mA range: 500 mA/600 V fuse, type F, Ø 5 × 20 mm.
2 A and 10 A range: 10 A/600 V fuse, type F, Ø 5 × 20 mm.
Maximum input current: INPUT socket max. 200 mA; A socket
max. 10 A (when measuring current above 5 A; the measurement
duration must be max. 10 seconds and further measurement may
only be made after 15 minutes)
Frequency range: 40 Hz to 400 Hz
Response: True RMS, corresponding to a calibrated eective value
of a sine wave.
Voltage drop: 200 mV for 200 mA/10 A range, 20 mV for 2 A range
Resistance
Range Resolution Accuracy
200 Ω 0.1 Ω
±(1% + 10)
2 kΩ 1 Ω
20 kΩ 10 Ω
200 kΩ 100 Ω
2 MΩ 1 kΩ
Overload protection: 250 V DC/AC rms

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Battery Test
Range Resolution Electrical load
1.5 V 1 mV approximately 20 mA
9 V 10 mV approximately 5 mA
Continuity Test
Symbol Description Note
The built-in buzzer will ring
constantly if resistance is lower
than 50 Ω.
Voltage of an
open circuit:
approximately 1 V
Overload protection: 250 V DC/AC rms
Diode Test
Symbol Description Note
The approximate voltage of
the diode in the direction of
the current ow will appear
on the screen.
Voltage of an open
circuit: approximately
2.2 V
Overload protection: 250 V DC/AC rms
Temperature Measurement
Range Resolution Accuracy
-40°C to 150°C 1°C ±(1% + 4)
150°C to 1,370°C ±(1.5% + 15)
-40 °F to 302 °F 1 °F ±(1% + 4)
302 °F to 1,999 °F ±(1.5% + 15)
Measuring outside of the range may damage the thermocouple and
result in major deviations in measurement accuracy.
DATA HOLD function
After the button is pressed, the currently measured value will
remain on the screen and a icon will appear. Pressing the button
again will cancel the function and the icon will disappear.
Screen Illumination
Long-pressing the button illuminates the screen for approx.
15 seconds; illumination then turns o again automatically.

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Operating Procedure
AC Voltage/DC Voltage Measurement
Connect the plug of the black (negative) tipped measuring conductor
into the COM socket and the plug of the red (positive) conductor for
measuring voltage into the INPUT socket. Use the circular switch
to select the DC voltage function, marked with the symbol, or
the AC voltage function, marked with the symbol. Select the
voltage range.
Place the measuring tips onto to spot you want to measure. The
voltage value and polarity (for DC voltage) will appear on the screen.
If you do not know the voltage range beforehand, set the largest
possible range and gradually reduce it as you measure. Connect the
measuring tips to the device or circuit where you will be measuring
voltage. Turn on the device you want to measure. The voltage value
will appear on the screen.
Note: To prevent electric shock and damaging the device, do not
connect the multimeter to voltages higher than 600 V.
Alternating Current/Direct Current Measurement
Note:
When measuring current up to 200 mA, connect the plug of the black
(negative) tipped measuring conductor into the COM socket and the
plug of the red (positive) for measuring voltage into the INPUT socket.
Switch to the function marked as and select the range. Repeat-
edly pressing the Select button switches between measuring direct
current (DC) or alternating current (AC). When measuring current up
to 10 A, rst select the 10 A measuring range and then connect the
plug of the black (negative) tipped measuring conductor into the COM
socket and the plug of the red (positive) for measuring voltage into
the A socket. If you do not know the current range beforehand, set
the highest range possible and gradually reduce it as you measure.
Connect the measuring tips to the device or circuit where you will
be measuring current. Turn on the device you want to measure. The
screen will display the current value and polarity (for DC) relative
to the red measuring tip.