Icel Manaus MD-6456 User manual

MANUAL DE INSTRUÇÕES
DO MULTÍMETRO DIGITAL
MODELO MD-6456
Inglês
Novembro 2016
Leia atentamente as instruções
contidas neste manual antes de
iniciar o uso do multímetro

I
Table of Contents
The Statement.......................................................................................................................................................................1
Safety Statement..........................................................................................................................................................1
Safety Instructions........................................................................................................................................................2
Safety Operation Specifications.................................................................................................................................2
Safety Symbols.............................................................................................................................................................5
Overview................................................................................................................................................................................6
Display............................................................................................................................................................................6
Buttons ...........................................................................................................................................................................7
Rotary Switch................................................................................................................................................................7
Input Socket...................................................................................................................................................................8
At the top........................................................................................................................................................................9
Measurement Operation....................................................................................................................................................10
Manual and Automatic Range..................................................................................................................................10
Relative Value Measurement....................................................................................................................................10
Maximum Value/Minimum Value/Maximum-minimum Value Hold.....................................................................11
USB Interface Function.............................................................................................................................................12
Measure AC or DC Voltage.......................................................................................................................................13
Measure DC or AC mV Voltage ...............................................................................................................................14
Measure Frequency and Duty Ratio .......................................................................................................................16
Measure AC or DC Current.......................................................................................................................................17
Measure Resistance..................................................................................................................................................18

II
Measure Connectivity................................................................................................................................................19
Measure Capacitance................................................................................................................................................20
Measure Diode............................................................................................................................................................21
Measure Temperature................................................................................................................................................22
Measure Transistor.....................................................................................................................................................24
Auto Power-off Function....................................................................................................................................................25
Backlight Function..............................................................................................................................................................25
Data Hold.............................................................................................................................................................................26
General Technical Specifications.....................................................................................................................................27
Accuracy Specifications.....................................................................................................................................................28
DC Voltage...................................................................................................................................................................28
AC Voltage...................................................................................................................................................................29
DC Current...................................................................................................................................................................29
AC Current...................................................................................................................................................................30
Resistance...................................................................................................................................................................30
Capacitance.................................................................................................................................................................31
Frequency and duty ratio ..........................................................................................................................................31
Diode Test....................................................................................................................................................................32
Connectivity Test.........................................................................................................................................................32
Temperature ................................................................................................................................................................33
Maintenance........................................................................................................................................................................34
Clean the Instrument..................................................................................................................................................34
Replace Battery and Fuse ........................................................................................................................................34

1
The Statement
In accordance with the international copyright law, without permission and written consent, do not copy the
contents of this manual in any form (including storage and retrieval or translation into languages of other
countries or regions). The manual is subject to change in future edition without prior notice.
Safety Statement
Caution
“Caution” mark refers to the condition and operation which may cause damage to the instrument or
equipment.
It requires that you must be careful during the execution of the operation. If incorrectly perform the
operation or do not follow the procedure, it may damage the instrument or equipment. In the circumstances
that such conditions are not met or not fully understood, please do not continue to perform any operation
indicated by the caution mark.
Warning
“Warning” mark indicates the condition and operation which may cause danger to users.
It requires that you must pay attention during the execution of this operation. If incorrectly perform the
operation or do not follow the procedure, it may result in personal injury or casualties. In the circumstances that
such conditions are not met or not fully understood, please do not continue to perform any operation indicated
by the warning mark.

2
Before using the instrument, please read this manual carefully and
pay attention to the relevant safety warning information.
Safety Instructions
The instrument is designed in accordance with the safety requirements on electronic measurement
instruments in International Electrical Safety Standards IEC61010. The instrument is designed and
manufactured strictly in accordance with provisions in IEC61010-1 CAT.III/1000V, over-voltage safety
standard CAT.IV/600V and pollution level 2.
Safety Operation Specifications
Warning: In order to avoid possible electric shock or peronal injury and other safety accidents,
please abide by the following specifications:
Before using the instrument, please read this manual carefully, and pay attention to the safety warning
information.
Check whether there are any cracks or damage on the plastic parts of the outer cabinet before using the
instrument, if any, please do not use it.

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Before using the instrument, please check whether the instrument works properly, if it’s not or it has been
damaged, please do not use.
Before using the instrument, please carefully check the insulator around the input terminals of the
instrument, please do not use if any damage.
Before using the instrument, please check whether there’s any crack or damage on the probe, if any, please
replace the probe with same specifications.
Before using the instrument, please check whether there’s any damage, metal exposed or sign of wear on
the insulating layer of the probe, if any damage, please do not use.
Before using the instrument, please use it to measure a known voltage to verify whether the instrument
works properly.
Use the instrument strictly in accordance with the operation in the manual, otherwise the protection function
provided by the instrument may be damaged or weakened.
The instrument shall be used in accordance with the specified measurement category, voltage or current
rating.
Please comply with local and national safety code. Wear personal protection equipment (such as approved
rubber gloves, masks and flame retardant clothes, etc.) to prevent being damaged by electric shock and
electric arc due to exposed hazardous live conductor.
Before connecting the instrument to the circuit under test, be sure to choose the correct input terminal and
switch position.
The voltage applied between input terminals or between any terminal and earth point cannot exceed the

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specified ratings of the instrument.
Please be careful if the measurement exceeds 30V AC true RMS, 42V AC peak or 60V DC. There may be
danger of electric shock at this kind of voltage.
When it shows low battery indicator, please replace the battery in time in case of any measurement error.
Do not use the instrument around explosive gas, steam or in wet environment.
When using the probe, please put your fingers behind the finger protector of the probe.
When measuring, please connect the zero line or the ground line firstly, then connect the live wire; but when
disconnecting, please disconnect the live wire firstly, then disconnect the zero line and ground line.
Before opening the outer cabinet or battery cover, please remove the probe on the instrument. Do not use
the instrument in the circumstances that the instrument is taken apart or battery cover is opened.
It only meets the safety standards when the instrument is used together with the supplied probe. If the
probe is damaged and needs to replace, the probe with same model number and same electrical
specifications must be used for replacement.

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Safety Symbols
High voltage warning
AC (Alternating current)
DC (Direct current)
AC or DC
Warning, important safety signs
Ground
Fuse
Equipment with double insulation or reinforced insulation protection
Battery undervoltage
Product complies with all relevant European laws
The additional product label shows that do not discard this
electrical/electronic product into household garbage.
CAT. III 1000V
CAT III 1000 V over-voltage protection
CAT. IV 600V
CAT IV 600 V over-voltage protection

6
Overview
The instrument is a hand-held measurement instrument, a true RMS high precision multimeter with
simulation bar and digital dual display. With large LCD screen and backlight, it’s easy for user to read, with
overload protection and battery undervoltage indication. Whether for professionals, factories, schools,
amateurs or family, it’s an ideal multi-functional instrument.
Display

Auto Power-off indicator

DC indicator

Maximum/Minimum value
measurement

Simulation bar, indicating
rapid change trend

Resistance or frequency unit

USB interface open indication

Battery undervoltage indicator

Voltage or current unit

Data display area

Connectivity measurement

Capacitance unit

Relative value measurement

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indicator
indicator

Diode measurement indicator

Temperature unit

Data hold indicator

Minus

Transistor indicator

Automatic range indicator

AC indicator

Duty ratio unit
Buttons

RANGE: switch between automatic range and manual
range

Hz%: switch between frequency and duty ratio

REL/USB: turn on relative measurement and USB

°C/°F: switch between centigrade and Fahrenheit

/H: turn on backlight and data hold

MAX/MIN: turn on Maximum value, minimum value,
maximum-minimum measurement

FUNC.: switch among function selections
Rotary Switch

OFF

AC or DC voltage, press FUNC. button to switch

AC or DC voltage mV, press FUNC. button to switch

Frequency, duty ratio, press Hz% button to switch

Resistance, diode, connectivity, capacitance, press FUNC. button to
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switch

Temperature measurement, press °C/°F button to switch unit

Transistor amplification test

AC and DC current microampere measurement, press FUNC. button
to switch

AC and DC current milliampere measurement, press FUNC. button
to switch

AC and DC current ampere measurement, press FUNC. button to
switch

OFF
Input Socket

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
Used for AC and DC current measurement (can measure maximum 10A), input socket for frequency/duty
ratio measurement (frequency measurement in current mode); when testing transistor, multi function test
socket “IN” input socket.

Used for AC and DC microampere (μA) and milliampere (mA) measurement (can measure maximum
600mA) and input socket for frequency/duty ratio (frequency measurement in current mode); when
testing transistor, multi function test socket “COM” input socket.

Used for public terminal of all measurement; negative input socket of K type thermocouple temperature
measurement.

Input socket for voltage, resistance, connectivity, diode, capacitance, frequency, duty ratio measurement;
positive input socket of K type thermocouple temperature measurement.
At the top
USB socket, used to connect to the computer.

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Measurement Operation
Manual and Automatic Range
The instrument is equipped with manual and automatic range. In automatic range mode, the instrument
will select the best range for the input signal detected, so it is convenient that the user does not need to
re-select range when changing the measuring signal. The instrument can also be set to manual range. It is
defaulted as automatic range mode after the unit is turned on or function is switched, the instrument displays
“AUTO” symbol. The operations of entering or quitting manual range are as follows:
1. In automatic range mode, press button, “AUTO” symbol hides.
2. Press button to increase the range, when reached the maximum range, the instrument will return to
the minimum range.
3. Press and hold button for 2 seconds to quit manual range mode, the instrument displays “AUTO”
symbol.
Note: duty ratio, connectivity, diode, temperature and transistor measurement function has only
one range.
Relative Value Measurement
The instrument is equipped with relative value measurement function. In this mode, the instrument display
value=actual value-set reference value. Operations of entering or quitting relative measurement are as follows:

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1. Set the instrument to the measurement function you need, contact the probe to the measured object
which you want to set as reference value, the instrument displays the measured value.
2. Press button and store the measured value as reference value, enter the relative measurement
mode, the instrument displays “REL” symbol.
3. Measure, the instrument will display “actual value-set reference value”.
4. Then press button and quit relative value measurement mode, the “REL” symbol hides.
Note: frequency, duty ratio, diode, connectivity, temperature and transistor measurement has no
relative value measurement mode.
Maximum Value/Minimum Value/Maximum-minimum Value Hold
The instrument is equipped with maximum value, minimum value and maximum-minimum value hold
function. Operations of entering or quitting this function are as follows:
1. Set the instrument to the measurement function you need.
2. Press button to enter maximum value hold mode, the instrument displays “MAX” symbol.
3. Press button again to enter minimum value hold mode, the instrument displays “MIN” symbol.
4. Press button again to enter maximum-minimum value hold mode, the instrument displays
“MAX-MIN” symbol.

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5. Press and hold button longer than 2 seconds, the instrument returns to normal measurement
mode.
Note: Frequency, duty ratio, diode, connectivity and transistor measurement does not have this
function.
USB Interface Function
The instrument is equipped with USB interface function, instrument measured data can be uploaded to the
computer for display, record and analysis via USB port. Operations of entering or quitting this function are as
follows:
1. Scroll the rotary switch of the instrument to any shift except “OFF”.
2. Press and hold button longer than 2 seconds, the instrument displays “USB” symbol, the function of
instrument data transmission is enabled.
3. Press and hold button longer than 2 seconds, the “USB” symbol hides, the function of instrument
data transmission is off.
Note: please refer to the interface software operation instructions for detailed operations.

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Measure AC or DC Voltage
As shown in the figure on the right:
1. Scroll the rotary knob to , press “FUNC.”button and
switch to AC voltage or DC voltage function.
2. Insert the red probe in “ ” socket, and the black
probe in “COM” socket.
3. Contact the probe to the measured circuit (connect to
the measured power supply or circuit in parallel),
measure the voltage.
4. Read the measurement result on the screen.
Note:
1. In AC voltage function, press Hz% button to
measure the frequency and duty ratio of the AC
voltage source, please refer to Measure Frequency.
2. The AC voltage value measured by using this instrument is true RMS (root mean square). For
sine wave and other wave (no DC offset), such as square wave, triangle wave and step wave,
these measurements are accurate.
Warning!
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Do not allow measurement of any voltage higher than DC 1000V or AC 750VRMS, otherwise it may
cause instrument damage, electric shock or personal injuries.
Do not allow applying voltage exceeding DC 1000V or AC 750V RMS between a public terminal and
the earth, otherwise it may cause instrument damage, electric shock or personal injuries.
Measure DC or AC mV Voltage
As shown in the figure on the right:
1. Scroll the rotary knob to “ ”, press “FUNC.”button and
switch to DC or AC voltage function.
2. Insert the red probe in “ ”socket and the black probe in
“COM” socket.
3. Contact the probe to the measured circuit (connect to the
measured power supply or circuit in parallel), measure the
voltage.
4. Read the measurement result on the screen.
Note:
1. In AC voltage function, press Hz% button to measure the
frequency and duty ratio of the AC voltage source, please refer to Measure Frequency.
2. The AC voltage value measured by using this instrument is true RMS (root mean square). For
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sine wave and other wave (no DC offset), such as square wave, triangle wave and step wave,
these measurements are accurate.
3. The maximum range for AC/DC mV (60/600mV) voltage measurement is 600mV, input
impedance up to 1011Ω, and the weak signal of measurement will not weaken, therefore the
measurement precision is high. But it’s normal in the circumstances that the probe is in open
circuit or contacting the measured circuit, the probe will be back to zero as long as in short
circuit, the reading will stabilize.
Warning!
Do not allow measurement of any voltage higher than DC 1000V or AC 750VRMS, otherwise it may
cause instrument damage, electric shock or personal injuries.
Do not allow applying voltage exceeding DC 1000V or AC 750V RMS between a public terminal and
the earth, otherwise it may cause instrument damage, electric shock or personal injuries.

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Measure Frequency and Duty Ratio
As shown in the figure on the right:
1. Scroll the rotary knob to “Hz%”, press “Hz%” button and switch
between frequency and duty ratio. (or inAC voltage or AC
current shift frequency and duty ratio can also be measured)
2. Insert the red probe in “ ” socket and the black probe in
“COM” socket.
3. Contact the probe to the measured circuit (connect to the
measured power supply or circuit in parallel), measure the
frequency or duty ratio.
4. Read the measurement result on the screen.
Warning!
1. Do not allow measurement of any voltage higher than DC 1000V or AC 750VRMS, otherwise it
may cause instrument damage, electric shock or personal injuries.
2. Do not allow applying voltage exceeding DC 1000V or AC 750V RMS between a public terminal
and the earth, otherwise it may cause instrument damage, electric shock or personal injuries.
Caution: To avoid any damage on the instrument or the equipment, do not input frequency or duty
ratio signal higher than 10V RMS.
Hz
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Measure AC or DC Current
As shown in the figure below:
1. According to the current of measurement scroll the rotary knob to any shift among “ ”, “ ” and “ ”,
press “FUNC.”button and switch to AC or DC function.
2. According to the shift of measurement insert the red probe in “mA”socket or 10A socket, and the
black probe in “COM” socket.
3. Disconnect the power supply of the measured circuit, connect the probe to the measured circuit in
series, and turn on the power supply of the circuit.
4. Read the measurement result on the screen.
Warning!
Do not allow measurement of any voltage higher than DC 1000V or AC 750V RMS, otherwise it may
cause instrument damage, electric shock or personal injuries. The power supply of the measured
circuit must be switched off firstly, otherwise it may cause electric shock or personal injuries.
Caution: to avoid any damage on the instrument or equipment, please check the fuse before
measurement, and use correct input socket.