Duratool D03143 User manual

1
Models: D03143 / D03144
Digital Multimeter

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

3
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
specications 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 count. Updates 2/sec
LCD Size 66 x 34mm
Polarity Indication “-” displayed automatically
Overrange 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
+ -
Model DCV ACV DCA ACA ΩhFE CAP Hz °C
D03143
D03144
FUNCTIONS

4
OVERVIEW
LCD
Range
switch
VΩ terminal
COM terminal
10A terminal
A/mA terminal
Power button
SPECIFICATIONS
• Accuracy is guaranteed for one year, 23°C ± 5°C, less than 80% RH.
DC VOLTAGE
Range Resolution Accuracy
200mV 0.1mV ± (0.5% rdg + 3 digits)
2V 1mV
± (0.8% rdg + 5 digits)20V 10mV
200V 100mV
600V 1V ± (1.0% rdg + 5 digits)
• Input impedance: 10MΩ.
• Overload protection: 600V DC
AC rms.
• Max. input voltage: 600V DC.
AC VOLTAGE
Range Resolution Accuracy
200mV 0.1mV ± (1.2% rdg + 5 digits)
2V 1mV
± (1.0% rdg + 5 digits)20V 10mV
200V 100mV
600V 1V ± (1.2% rdg + 5 digits)
• 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 ~
1370°C 1°C -40°~150°C ± (1.0% + 4)
150°C~1370°C ± (1.5% + 15)
• Overload protection:
250V DC/AC rms.

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DC CURRENT
Range Resolution Accuracy
20µA 10nA
± (1.8% of rdg + 2 digits)
200µA 100nA
2mA 1µA
20mA 10µA
200mA 100µA ± (2.0% of rdg + 2 digits)
2A 1mA ± (2.0% of rdg + 10
digits)
10A 10mA
Overload protection:
• mA: F0.5A/600V fuse
(D03144).
• A: F2A/600V fuse (D03143).
• 10A: F10A/600V fuse.
• Voltage drop: 200mV.
AC CURRENT
Range Resolution Accuracy
20µA 10nA ± (2.0% of rdg + 5 digits)
200µA 100nA
± (2.0% of rdg + 3 digits)2mA 1µA
20mA 10µA
200mA 100µA ± (2.0% of rdg + 5 digits)
2A 1mA ± (2.5% of rdg + 10
digits)
10A 10mA
Overload protection:
• 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.
TRANSISTOR hFE TEST
Range hFE Test Current Test Voltage
PNP & NPN 0~1000 lb≈10µA Vce≈2.8V
RESISTANCE
Range Resolution Accuracy
200Ω 0.1Ω ± (1.0% of rdg + 10 digits)
2kΩ 1Ω
± (1.0% of rdg + 4 digits)20kΩ 10Ω
200kΩ 100Ω
2MΩ 1kΩ ± (1.0% of rdg + 10 digits)
20MΩ 10kΩ ± (5% (rdg - 10) + 10
digits)
200MΩ 100kΩ
• Open circuit voltage: about
3V.
• Overload protection: 250V
DC/AC rms.
DIODE & CONTINUITY
Range Introduction Remark
The approximate forward
voltage drop will be displayed
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 + 5 digits)
20nF 10pF
200nF 100pF
2µF 1nF
20µF 10nF
• Overload protection:
F0.5A/600V fuse.
• Overload protect: 250V DC/
AC rms.
FREQUENCY
Range Resolution Accuracy
2kHz 1Hz ± (3.0% of rdg + 5 digits)
20kHz 10Hz
• Overload protect: 250V
DC/AC rms.
OPERATION - MEASURING VOLTAGE
• Connect the black test lead to the “COM” jack and the red lead to the “VΩ” jack.
• Set the function switch to the desired range: V~ or V.
• If the voltage magnitude to be measured is unknown beforehand, select the
highest range.
• Connect the test leads across the source or load to be measured.
• Read the LCD. The polarity of the red lead connection will be indicated when
making a DC measurement.
Note: 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. This is normal and will not affect
the measurements.
When the meter shows the overrange symbol “1”, a higher range must be selected.
To avoid damage to the meter, don’t 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 for D03144, or less than 2A for D03143, connect the red test lead to
the “mA”/“A” 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 unknown beforehand, set the ranges
switch to the highest range position and then reduce it range by range until the
desired resolution is obtained.
• Connect the test leads in series with the circuit to be measured.
• Read the display. For DC current measurement, the polarity of the red test lead
The built-in buzzer will sound
if the resistance is less than
about 30 ± 20Ω
Open circuit
voltage: about 2.8V

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connection will be indicated as well.
Note: When the display shows the overrange symbol “1”, a higher range must be
selected.
MEASURING RESISTANCE
• Connect the black test lead to the “COM” jack and the red test lead to the “VΩ”
jack.
Note: The polarity of the red test lead is positive.
• Set the range switch to the desired “Ω” range.
• If the current magnitude to be measured is unknown beforehand, select the
highest range.
• Connect the test leads across the load to be measured, before reading the display.
• 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 is not connected, i.e. an open circuit, the symbol “1” will be
displayed as an overrange indicator.
Note: Before measuring in-circuit resistance, be sure that the circuit under test has all
power removed and all capacitors fully discharged.
CONTINUITY TEST
• Connect the black test lead to the “COM” jack and the red test lead to the “VΩ”
jack.
Note: The polarity of the red test lead is positive.
• Set the range switch to the “ ” range.
• Connect the test leads across the load to be measured.
• If the circuit resistance is lower than about 30 ± 20Ω, the built-in buzzer will sound.
DIODE TEST
• Connect the black test lead to the “COM” jack and the red lead 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 or the diode to be tested and the black test
lead to the cathode.
• The meter will shows the approximate forward voltage drop of diode. If the
connections are reversed, “1” will be shown on the display.
TRANSISTOR TEST (W/MULTIFUNCTION ADAPTOR)
• Set the range switch to the “hFE” range.
• Connect the adaptor to the “COM” jack and the “hFE” jack. Do not reverse the
connection.
• Identify whether the transistor is NPN or PNP type and locate the emitter, base
and collector lead. Insert the lead of the transistor to be tested into the proper
holes of the transistor test socket of the adaptor.
• The LCD will show the approximate hFE value.
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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CAPACITANCE MEASURING
• Connect the black test lead to the “COM” jack and the red lead to the “mA” jack.
• Set the function switch at position “F”.
Note: The polarity of the red test lead is positive.
• Connect the test leads across the capacitor under pressure and be sure that the
polarity of the connection is observed.
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 as the meter could be seriously damaged.
FREQUENCY MEASURING
• Set the function range switch to the required “Hz” position.
•Connect the black test lead to the “COM” jack and the red lead to the “VΩ” jack.
Note: The polarity of the red test lead is positive.
• Connect the test leads across the load to be measured.
• Do not apply more than 250V rms to the input. Indication is possible to a voltage
higher than 100V rms, but the reading may be out of specication.
AUTO POWER OFF
• If the meter is not used or operated for 15 minutes, it will automatically turn off.
• To turn it on again, just push the power button twice.
BATTERY & FUSE REPLACEMENT
• Before replacing the battery or the fuse ensure that all test leads have been
disconnected and the power is off.
• If the low battery indicator ( ) appears on the display, replace the battery
immediately.
• Remove the screws and open the back case.
•Then replace the exhausted battery with a new one of the same specication (9V
IEC 6F22, NEDA 1604).
• The meter is protected by a fuse:
- mA: F0.5A/600V fast, breaking capacity is 10kA, dimensions 5 x 20mm.
- 10A: F10A/600V fast, breaking capacity is 10kA, dimensions 5 x 20mm.
- A (D03143): F2A/600V fast, breaking capacity is 10kA, dimensions 5 x
20mm.
+ -
• 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.
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.
PO Box 13362 Dublin 2
PR2 9PP
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