Aktakom AMM-1022 User manual

AMM-1022
Digital Multimeter
USER`S MANUAL
www.tmatlantic.com

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CONTENTS
1. SAFETY INFORMATION…………………………….3
2. DESCRIPTION………………………………………..6
3. SPECIFICATIONS…………………………………….8
4. OPERATING INSTRUCTION………………………..11
4.1 Voltage measurement…………………….……..11
4.2 Current measurement……………………………12
4.3 Resistance measurement…………………….....13
4.4 Diode test………………………………………….13
4.5 Continuity test…………………………………….14
4.6 Temperature measurement……………………...14
4.7 Transistor measurement…………………………15
5. MAINTENANCE………………………….…………..16

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1. SAFETY INFORMATION
WARNING
To ensure safe operation, and in order to
exploit to the full the functionality of the meter,
please follow the directions in this section
carefully.
This multimeter has been designed according to IEC-1010
concerning electronic measuring instruments with an
overvoltage category CAT II 1000V, CAT III 600V and
pollution 2.
Follow all safety and operating instructions to ensure that
the meter is used safely and is kept in good operating
condition.
With proper use and care, the digital meter will give you
years of satisfactory service.
1.1 PRELIMINARY
- When using the meter, the user must observe all
normal safety rules concerning:
Protection against the dangers of electrical current.
Protection of the meter against misuse.
- When the meter is delivered, check that it has not been
damaged in transit.
- When poor condition under harsh preservation or
shipping conditions caused, inspect and confirm this
meter without delay.
- Test leads must be in good condition. Before using verify
that the insulation on test leads is not damaged and/or
the leads wire is not exposed.

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- Full compliance with safety standards can be guaranteed
only if used with test leads supplied. If necessary, they
must be replaced with the same model or same electric
ratings.
1.2 DURING USE
- Before using, you must select the right input jack,
function and range.
- Never exceed the protection limit values indicated in
specifications for each range of measurement.
- When the value scale to be measured is unknown
beforehand, set the range selector at the highest
position.
- Do not measure voltage if the voltage on the terminals
exceeds 1000V above earth ground.
- Always be careful when working with voltages above 60V
DC or 30V AC rms, keep fingers behind the probe
barriers while measuring.
- Before rotating the transform switch to change functions
and ranges, disconnect test leads from the circuit under
test.
- Never perform resistance, temperature, transistor, diode
and continuity measurements on live circuits.
- Never use the meter under the condition of the explosive
air, steam or dirt.
- If any faults or abnormalities are observed, the meter can
not be used any more and it has to be checked out.
- Never use the meter unless the rear case is in place and
fastened fully.
- Please do not store or use meter in areas exposed to direct
sunlight, high temperature, humidity or condensation.

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1.3 SYMBOL
1.4 MAINTENANCE
- Please do not attempt to adjust or repair the meter by
removing the rear case while voltage is being applied. A
technician who fully understands danger involved should
only carry out such actions.
- Before opening the battery cover or case of the meter,
always disconnect test leads from all tested circuits.
- To avoid the wrong reading causing electricity attack, when
the meter displays “ ”, you must change the battery.
- For continue protection against fire, replace fuse only with
the specified voltage and current ratings: F 200mA/250V
(quick acting).
- Do not use abrasives or solvents on the meter, use a damp
cloth and mild detergent only.
- Always set the power switch to the OFF position when the
meter is not in use.
- If the meter is to be stored for a long period of time, the
batteries should be removed to prevent damage to the unit.
Caution:refer to the instr
uction manual.
Incorrect use may result in damage to the
device or its components.
Earth
This instrument has double insulation.
Fuse: F 200mA/250V

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2. DESCRIPTION
- This meter is a portable professional measuring
instrument with handsome LCD easily reading.
- Single operation of a transform switch makes
measurement convenient. Overload protection and low
battery indication are provided, this meter is ideal for use
in the fields, workshop, school, hobby and home
applications.
- This meter is with the functions of data hold.
NAME OF COMPONENTS
1. LCD display
2. Hold key
3. Rotary switch
4. hFE socket
5. Terminals

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3. SPECIFICATIONS
3.1 GENERAL SPECIFICATIONS
- Environment conditions:
600V CAT III and 1000V CAT II
Pollution degree: 2.Altitude < 2000 m.
- Operating temperature:
0~40°C (32℉to 104℉), (<80% RH, non-condensing)
- Storage temperature:
-10~50°C(14℉to 122℉), (<70% RH, battery removed)
- Temperature Coefficient:
0.1×(specified accuracy) /OC (<18°C or >28°C)
- MAX. Voltage between terminals and earth ground:
750V AC rms or 1000V DC
- Fuse Protection: mA: F 200mA/250V ∅5×20,
10A: unfused.
- Display: LCD, 1999 counts, updates 2-3/sec.
- Over Range indication: LCD will display "1".
- Low battery indication:
The " " is displayed on the LCD.
- Polarity indication: "−" displayed automatically.
- Power source: 4.5V
- Battery type: AAA 1.5V
- Dimensions: 158(L)×74(W)×31(H) mm.
- Weight: 220g. Approx. (battery included).
3.2 Measurement specifications
Accuracy: ±(% of reading + number of digits) at 18°C to
28°C (64°F to 82°F) with relative humidity to 80%.
(Accuracy is specified for a period one year after calibration)

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3.2.1 DC VOLTAGE
Range Resolution Accuracy
0.2V
0.1mV
±0.5%±2
2V
1mV
±0.5%±3
20V
0.01V
±0.8%±3
200V
0.1V
1000V
1V
±0.8%±5
- Input impedance: 1MΩ
- Max. input voltage: 200mV range: 250VDC orAC rms
2V-1000V ranges: 1000VDC or 750V rms
3.2.2 AC VOLTAGE
Range Resolution Accuracy
2V
1mV
-
20V
10mV
-
200V
0.01V
±1.2%±5
750V
1V
- Input impedance: 1MΩ
- Max. input voltage: 200mV range: 250VDC or AC rms
2V-1000V ranges: 1000VDC or 750V rms
- Frequency range: 40Hz-400Hz
- Response:Average, calibrated in rms of sine wave.

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3.2.3 DC CURRENT
Range Resolution Accuracy
200uA
0.1uA
±1.0%±2
2mA
1uA
20mA
10uA
±1.5%±2
200mA
100uA
10A
10mA
±3.0%±2
Overload protection: F250mA/250V fuse (10A range
unfused).
Max. Input Current: mAJack: 200mA, 10A Jack: 10A
3.2.4 Transistor hFE
Display: read approximate hFE value (0~1000) of transistor
under test (ALL TYPE).
Test condition: base current approx. 2µA.
VCE: approx. 2.8V
3.2.5 Resistance
Range Resolution Accuracy
200Ω
0.1Ω
±1.0%±3
2KΩ
1Ω
±1.0%±2
20KΩ
10Ω
200KΩ
100Ω
2MΩ
1kΩ
20MΩ
10kΩ
-
Overload protection: 250V DC or 250V AC rms.
3.2.6 Diode test
Display: read approximate forward voltage of diode
Forward DC Current: approx. 1mA

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Reversed DC Voltage: approx. 2.8V
Overload protection: 250V DC or 250V AC rms
3.2.7 Audible continuity test
Built-in buzzer sounds if resistance is less than approx.
50Ω.
Open circuit voltage: approx. 2.8V
Overload protection: 250V DC or 250V AC rms
3.2.8 Temperature
Range Resolution Accuracy
-20℃to 0℃
±5.0%±4
0℃to 400℃1℃±1.0%±3
400℃to 1000℃±2.0%±3
- Overload Protection: 250V DC or rmsAC
4. OPERATING INSTRUCTION
4.1 Voltage measurement
- Set rotary switch to the desired V or V~ range.
- Connect the black and red test leads to the COM and V
terminals respectively.
- Connect the test leads to the circuit being measured
- Read the displayed value. The polarity of red test lead
connection will be indicated when making a DCV
measurement.
- When only the figure “1” is displayed, it indicates
overrange situation and the higher range has to be
selected.

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To avoid electrical shock and/or damage to
the instrument, do not attempt to take any
voltage measurement that might exceeds
1000Vdc or 750Vac rms. Do not apply more
than 1000Vdc or 750Vac rms between the
common terminal and the earth ground.
4.2 Current measurement
- Set the rotary switch to the desiredA or A~ range.
- Connect the black test lead to the COM terminal and the
red test leads to the mA terminal for a maximum of 200mA.
For a maximum of 10A, move the red test lead to the 10A
terminal.
- Connect test leads in series with the load in which the
current is to be measured.
- Read the displayed value. The polarity of red test lead
connection will be indicated when making a DCA
measurement.
- When only the figure "1" displayed, it indicates overrange
situation and the higher range has to be selected.
To avoid damage to the meter, use the proper
terminals, function, and range for your
measurement.
NOTE:
- When only the figure ‘OL’ is displayed, it indicates
overrange situation and the higher range has to be
selected.
- When the value scale to be measured is unknown

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beforehand, set the range selector at the highest
position.
- “ ” means the socket of INPUT maximum current is
200mA, over current will destroy the fuse. 10A’s
maximum current is 10A, no fuse protection.
4.3 Resistance measurement
- Connect the black test lead to the COM jack and the red
test lead to the Ωjack.
- Set the transform switch at the Ωrange position.
- Connect test leads across the resistance under
measurement.
- You can get reading from LCD.
To avoid electrical shock and/or damage to
the instrument, disconnect circuit power and
discharge all high-voltage capacitors before
measuring resistance.
NOTE:
- For measuring resistance above 1MΩ, the meter may take
a few seconds to stabilize reading. This is normal for high
resistance measuring.
- If the resistance being measured exceeds the maximum
value of the range selected or the input is not connected,
an overrange indication "1" will be displayed.
4.4 Diode test
- Set the rotary switch to range.
- Connect the black and red test leads to the COM and Ω
terminals respectively.
- Connect the red test lead to the anode, black test lead to

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the cathode of the diode under testing.
- The meter will show the approx. forward voltage of the
diode. If the lead connection is reversed, only figure "1"
displayed.
To avoid electrical shock and/or damage to
the instrument, disconnect circuit power and
discharge all high-voltage capacitors before
testing diodes.
4.5 Continuity test
- Set the rotary switch to range.
- Connect the black and red test leads to the COM and Ω
terminals respectively.
- Connect the test leads to the resistance in the circuit being
measured.
- When the test lead to the circuit is below 50Ω, a
continuous beeping will indicate it.
To avoid electrical shock and/or damage to
the instrument, disconnect circuit power and
discharge all high-voltage capacitors before
testing for Continuity.
4.6 Temperature measurement
- Set the transform switch at the TEMP range position.
- The LCD display will show the current environment
temperature.
- When measuring the temperature with thermocouple, ‘K’
type probe for this meter can be used. Insert the black

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plug to the COM jack and the red one to the TEMP jack,
touch the end of the temperature sensor to the area or
surface of the object for measurement.
- You can get reading from LCD.
To avoid electrical shock, do not connect the
thermocouples with the electriferous circuit.
4.7 Transistor measurement
- Set the rotary switch to hFE range.
- Determine whether the transistor to be tested is NPN or
PNP type and locate the Emitter, Base and Collector
leads.
- Insert leads of the transistor into proper holes of the hFE
socket.
- The meter will show the approx. hFE value at test
condition of base current 10μA and Vce 2.8V.
To avoid electrical shock and/or damage to the
instrument, before attempting to insert
transistors for testing, always be sure that test
leads have been disconnected from any
measurement circuits
．

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5. MAINTENANCE
5.1 General Maintenance
Periodically wipe the case with a damp cloth and mild
detergent. Do not use abrasives or solvents.
Dirt or moisture in the terminals can affect readings.
To clean the terminals:
- Turn the meter off and remove all test leads.
- Shake out any dirt that may be in the terminals.
- Soak a new swab with a cleaning and oiling agent.
- Work the swab around in each terminal. The oiling agent
insulates the terminals from moisture-related contamination.
To avoid electrical shock or damage to the
meter, do not get water inside the case.
Remove the test leads and any input signals
before opening the case
5.2 Fuse replacement
To replace the Meter's fuse (see the Figure):
- Set the rotary switch to OFF range.
- Disconnect test leads from any inputs terminals.
- Use a screwdriver to unscrew the two screws secured on
the battery cover.
- Separate the battery cover from the bottom case.
- Replace the fuse only with specified ratings:
F 200mA/250V ∅5×20 (quick acting).
- Replace the battery cover and secure by the two screws.
Before replacing the fuse, disconnect test
leads from any circuit under test.
To prevent damage or injury, replace the fuse
only with specified ratings.

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5.3 Battery replacement
To replace the battery (see the Figure):
- When the battery voltage drop below proper operation
range the symbol will appear on the LCD display and
the battery need to be replaced.
- Turn the meter off and remove all test leads.
- Use a screwdriver to unscrew the two screws secured on
the battery cover, and remove the battery cover.
- Replace the battery with three new 1.5V battery (AAA).
- Reinstall the battery cover and secure by the two screws.
Before replacing the battery, disconnect test
leads from any circuit under test, turn the
meter off and remove test leads from the
input terminals.
ACCESSORIES
⑴Test Leads one set
⑵Battery:1.5V, AAA three pieces
⑶Instruction Manual one piece
⑷Thermocouple (K type) one piece

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CAUTION
Using this appliance in an environment with a strong
radiated radio-frequency electromagnetic field (approx.
3V/m), may influence its measuring accuracy. The
measuring result can be strongly deviating from the
actual value.