Duratool D03143 User manual

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Digital Multimeter
Models: D03143 & D03144

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WHAT’S INCLUDED
• One digital multimeter
• One user manual
• One pair of test leads
• One K-Type thermocouple (D03144)
• One adaptor
CONTENTS
Page Number Details
2 What’s Included
3 Important Safety Information
3General Specication
3Function Table
4 Product Overview
4 DC Voltage
4 AC Voltage
4 Temperature
4Transistor hFE Test
5 DC Current
5 AC Current
5 Resistance
5 Diode & Continuity
6 Capacitance
6 Frequency
6 Operation - Measuring Voltage
6 Measuring Current
7 Measuring Resistance
7Continuity Test
7Diode Test
7Transistor Test (w/Multifunction Adaptor)
7Measuring Temperature (w/Multifunction Adaptor)
8 Measuring Capacitance
8 Measuring Frequency
8 Auto Power Off
8 Battery & Fuse Replacement

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IMPORTANT SAFETY INFORMATION
Please read these instructions carefully before use and retain for future
reference.
• When using electrical appliances basic safety precautions should always be
followed.
• Do not apply more than the rated voltage, as marked on the meter, between the
terminals, or between any terminal and grounding.
• The rotary switch must be placed in the correct position and no changeover of
range must be made while conducting measurements, in order to prevent damage
to the meter.
• Use the proper terminals, function and range for measurements.
• Do not use or store the meter in an environment of high temperature or high
humidity as the performance of the meter may deteriorate.
• When using the test leads, keep your ngers behind the nger guards.
• Disconnect circuit power and discharge all high voltage capacitors before testing
resistance, continuity, diodes or hFE.
• This meter is designed for indoor use only.
• Replace the battery as soon as the low battery indicator appears.
• Before opening the case of the meter, remove the connection between the testing
leads and the circuit being tested and turn the power off.
• When servicing the meter, only use the same model number or identical electrical
specications for replacement parts.
• Turn the meter off when it is not in use and remove the battery when not in use for
a long period of time.
GENERAL SPECIFICATION
Display LCD, 1999 counts updates 2/sec
LCD size 66 x 34mm
Polarity indication “-” displayed automatically
Over-range indication “1” displayed
Low battery indication “ ” displayed.
Range select Manual
Operation temperature 0°C to 40°C, less than 80% RH
Storage temperature -10°C to 50°C, less than 85% RH
Battery type 9V battery IEC 6F22, NEDA 1604
Dimensions 193 x 90 x 37mm
Weight Approx. 251g
FUNCTION TABLE
Model DCV ACV DCA ACA ΩhFE CAP Hz °C
D03143 
D03144 
• Accuracy is
guaranteed for
1 year 23°C ±
5°C less than
80% RH.

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DC VOLTAGE
Range Resolution Accuracy
200mV 0.1mV ± (0.5% of rdg + 3dgts)
2V 1mV
± (0.8% of rdg + 5dgts)20V 10mV
200V 100mV
600V 1V ± (1.0% of rdg + 5dgts)
• Input impedance: 10MΩ.
• Overload protection: 600V DC
AC rms.
• Max. input voltage: 600V.
AC VOLTAGE
Range Resolution Accuracy
200mV 0.1mV ± (1.2% of rdg + 5dgts)
2V 1mV
± (1.0% of rdg + 5dgts)20V 10mV
200V 100mV
600V 1V ± (1.2% of rdg + 5dgts)
• Input impedance: 10MΩ.
• Frequency range: 40Hz~400Hz.
• Overload protection: 600V DC
AC rms.
• Response: Average, calibrated
in rms of sine wave.
• Max. input voltage: 600V AC
rms.
TEMPERATURE
Range Resolution Accuracy
-40°C ~
1370°C 1.0°C -40°C~150°C: ± (1.0% + 4)
± (1.0% of rdg + 5dgts)
• Overload protection: 250V
DC/AC rms.
TRANSISTOR hFE TEST
Range hFE Test Current Test Voltage
PNP & NPN 0~1000 lb≈10µA Vce≈2.8V
PRODUCT OVERVIEW
LCD
Range switch
VΩ terminal
COM terminal
Power button
A/mA terminal
10A terminal

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DC CURRENT
Range Resolution Accuracy
20µA 10nA
± (1.8% of rdg + 2dgts)
200µA 100nA
2000µA 1µA
20mA 10µA
200mA 100µA ± (2.0% of rdg + 2dgts)
2A 1mA ± (2.0% of rdg +
10dgts)
10A 10mA
• mA: F0.5A/600V fuse (D03144).
• A: F2A/600V fuse (D03143).
• 10A: F10A/600V fuse.
• Voltage drop: 200mV.
Range Resolution Accuracy
20µA 10nA ± (2.0% of rdg + 5dgts)
200µA 100nA
± (2.0% of rdg + 3dgts)2000µA 1µA
20mA 10µA
200mA 100µA ± (2.0% of rdg + 5dgts)
2A 1mA ± (2.5% of rdg +
10dgts)
10A 10mA
AC CURRENT
• mA: F0.5A/600V fuse (D03144).
• A: F2A/600V fuse (D03143).
• 10A: F10A/600V fuse.
• Voltage drop: 200mV.
• Frequency range: 40Hz~400Hz.
• Response: Average, calibrated
in rms of sine wave.
RESISTANCE
Range Resolution Accuracy
200Ω 0.1Ω ± (1.0% of rdg + 10dgts)
2kΩ 1Ω
± (1.0% of rdg + 4dgts)
20kΩ 10Ω
200kΩ 100Ω
2MΩ 1kΩ
20MΩ 10kΩ ± (1.0% of rdg + 10dgts)
200MΩ 100kΩ ± (5.0%* (rdg - 10) + 10dgts)
• Open circuit voltage: about
3V.
• Overload protection: 250V
DC/AC rms.
DIODE & CONTINUITY
Range Introduction Remark
The approx. forward voltage
drop will be displayed
Open circuit
voltage: about 2.8V
The built-in buzzer will
sound if resistance is less
than about 30±20Ω
Open circuit
voltage:about 2.8V
• Overload
protection: 250V
DC/AC rms.

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CAPACITANCE
Range Resolution Accuracy
2nF 1pF
± (4.0% of rdg + 5dgts)
20nF 10pF
200nF 100pF
2µF 1nF
20µF 10nF
• Overload protection:
F0.5A/600V fuse.
• Over-load protect: 250V DC/
AC rms.
FREQUENCY
Range Resolution Accuracy
2kHz 1Hz ± (3.0% of rdg + 5dgts)
20kHz 10Hz
• Overload protection: 250V DC/
AC rms.
OPERATION - MEASURING VOLTAGE
• Connect the black test lead to the “COM” jack and the red to the “VΩ” jack.
• Set the function switch to the desired V~ or Vrange.
• If the voltage magnitude to be measured is unknown beforehand, select the
highest range.
• Connect the test leads across the source or load to measured.
• Read the LCD. The polarity of the red lead connection will be indicated when
making a DC measurement.
Notes:
• In a small range, the meter may display an unstable reading when the test leads
have not been connected to the load to be measured. It is normal and will not
affect the measurements.
• When the meter shows the over range symbol “1”, a higher range must be
selected.
• To avoid damage to the meter, do not measure a voltage that exceeds 600V DC or
600V AC.
MEASURING CURRENT
• Connect the black test lead to the “COM” jack. If the current to be measured is less
than 200mA (2A for for D03143), connect the red test lead to the “mA”/“A2” jack. If
the current is between 200mA/2A and 10A, connect the red test lead to the “10A”
jack instead.
• Set the function switch to the desired A~ or A range.
• If the current magnitude to be measured is not known beforehand, set the ranges
switch to the highest range position and then reduce it range by range until the
satisfactory resolution is obtained.
• If the current magnitude to be measured is not known beforehand, select the
highest range.
• Connect the test leads in series with the circuit to be measured.
• Read the reading on the display. For DC current measurement, the polarity of the

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red test lead connection will be indicated as well.
Note: When the display shows the over range symbol “1”, a higher range must be
selected.
MEASURING RESISTANCE
• Connect the black test lead to the “COM” jack and the red to the “VΩ” jack (note:
the polarity of the red test lead is positive).
• Set the range switch to the desired Ωrange.
• If the current magnitude to be measured is not known beforehand, select the
highest range.
• Connect the test leads across the load to be measured.
• Read the reading on the display.
Notes:
• For resistance measurements >1MΩ, the meter may take a few seconds to
stabilise the reading. This is normal for high-resistance measurement.
• When the input symbol is not connected i.e. at open circuit, the symbol “1” will be
displayed as an over range indicator.
• Before measuring in-circuit resistance, make sure that the circuit under test has all
the power removed and all capacitors are fully discharged.
CONTINUITY TEST
• Connect the black test lead to the “COM” jack and the red to the “VΩ” jack (note:
the polarity of the red test lead is positive).
• Set the range switch to range.
• Connect the test leads across the load to be measured.
• If the circuit resistance is lower than 30 ± 20Ω, the built-in buzzer will sound.
DIODE TEST
• Connect the black test lead to the “COM” jack and the red to the “VΩ” jack (note:
the polarity of the red test lead is positive).
• Set the range switch to the range.
• Connect the red test lead to the anode of the diode to be tested and the black test
lead to the cathode.
• The meter will show the approximate forward voltage of the diode. If the
connections are reversed, “1” will be shown on the display.
TRANSISTOR TEST (W/MULTIFUNCTION ADAPTOR)
• Set the range switch to the °C range.
• Connect the adaptor to the “COM” jack and the “°C” jack. Do not reverse the
connection.
• Insert the black plug of the K-type thermocouple to the adaptor “-” socket and the
red plug to the adaptor “+” socket.
• Carefully touch the end of the thermocouple to the object to be measured.
• Wait a short while and then read the reading on the display.
MEASURING TEMPERATURE (W/MULTIFUNCTION ADAPTOR)
• Set the range switch to the °C range.
• Connect the adaptor to the “COM” jack and “°C” jack. Do not reverse the
connection.

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MEASURING CAPACITANCE
• Connect the black test lead to the “COM” jack and the red to the “mA” jack.
• Set the function switch to Fposition (note: the polarity of the red lead is positive).
• Connect the test leads across the capacitor under measurement and ensure you
observe the polarity of the connection.
• Note: To avoid damage to the meter, disconnect the circuit power and discharge
all high-voltage capacitors before measuring capacitance. The tested capacitor
should be discharged before the testing procedure. Never apply voltage to the
input, or serious damage may result.
MEASURING FREQUENCY
• Set the function range switch to the required Hz position.
• Connect the black test lead to the “COM” jack and the red to the “VΩ” jack (note:
the polarity of the red test lead is positive).
• Connect the test leads across the load to be measured.
Note: Do not apply more than 250V rms to the input. Indication is possible for a voltage
higher than 100V rms, but may be out of specication.
AUTO POWER OFF
• If you do not operate the meter for 15 minutes, it will turn off automatically. To
switch it on again push the power button twice.
INFORMATION ON WASTE DISPOSAL FOR CONSUMERS OF
ELECTRICAL & ELECTRONIC EQUIPMENT.
When this product has reached the end of its life it must be treated as Waste Electrical
& Electronic Equipment (WEEE). Any WEEE marked products must not be mixed with
general household waste, but kept separate for the treatment, recovery and recycling
of the materials used. Contact your local authority for details of recycling schemes in
your area.
Made in China. PR2 9PP
V 1.1
REPLACING THE BATTERY & FUSE
• Prior to replacing the battery or fuse, disconnect the test leads and ensure the
power is off.
• If the low battery symbol appears on the display it indicates that the battery should
be replaced. Remove the screws and open the back case, replace the old battery
with the new battery (9V IEC 6F22, NEDA 1604 or equivalent specication).
• Snap the battery connector leads to the terminals of a new battery and reinsert the
battery into the case top. Dress the battery leads so that they will not be pinched
between the case bottom and top.
• The meter is protected by a fuse:
- mA: F0.5A/600V fast, breaking capacity is 10kA, dimensions ɸ5x20mm
- 10A: F10A/600V fast, breaking capacity is 10kA, dimensions ɸ5x20mm
- A (D03143): F2A/600V fast, breaking cacpacity is 10kA, dimensions ɸ5x20mm
• Replace the case bottom and reinstall the three screws. Never operate the meter
unless the case bottom is fully closed.
• Insert the black plug of the K-type thermocouple to the adaptor “-” socket and the
red plug to the adaptor “+” socket.
• Carefully touch the end of the thermocouple to the object to be measured.
• Wait a short while and read the display.