User Manual

V1.0
-4- -5- -6-
尺寸：100*140mm
-7- -8-
GETTING TO KNOW YOUR DEVICE
● BUTTON FUNCTIONS
Thank you for purchasing the True RMS 2000 Counts CLAMP
METER from AstroAI. The AstroAI True RMS Digital CLAMP
METER is designed to be safely and accurately used by
professionals and weekend DIYer’s alike. This manual
provides all safety information, operation instruction,
specifications, and maintenance for the meter. The instrument
performs AC Current AC/DC Voltage, Resistance, Audible
Continuity Testing, Diode Testing, NCV Detection, and
Capacitance Testing. Thank you again for choosing AstroAI, if
you have any questions or concerns regarding your product,
please contact us at [e-mail].
NOTE: Fully read and understand this manual before using
this Digital CLAMP METER, if you are a beginner to
multimeters, please read and keep this manual for reference.
WARNING
● Use the Meter strictly in accordance with this manual,
otherwise the protection function provided by the Meter may
be damaged or weakened.
● Please be especially careful when measuring over 60V DC,
30V AC RMS or 42V peak value as there is a danger of an
electric shock.
● Do not apply more than the rated voltage, as marked on the
Meter, between the terminals or between any terminal and
grounding.
● Check whether the Meter is working normally by measuring
the known voltage, do not use it if the readings are incorrect
or the Meter is damaged.
● Use the Meter according to the measurement category,
voltage or current rating specified on the meter or manual.
To avoid possible electric shocks or personal injury, and to
avoid possible damage to the Meter or to the equipment being
tested, adhere to the following rules :
● Before using the meter, please check whether there are
cracks or damage to the plastic parts of the meter casing.
Do not use the Meter if all or part of the exterior casing is
damaged.
● Before using the Meter, please check whether the test leads
are cracked or damaged. Please replace the test leads with
the same model and same electrical specifications if the
leads are damaged.
● Comply with local and national safety regulations. Wear
personal protective equipment (such as approved rubber
gloves, masks, and flame-retardant clothing, etc.) to prevent
injury from electric shocks and arcs when hazardous live
conductors are exposed.
● Replace the battery as soon as the low-battery indicator
appears to avoid measurement errors.
● Do not use the Meter around explosive gas or steam; or
humid environments.
● When using the test leads, keep your fingers behind the
finger guards.
● Do not measure the current when a test lead is inserted into
the INPUT Terminal.
● Do not let the Meter work alone without someone being
present.
● When measuring, connect the neutral wire or ground wire
first, and then connect the live wire; when disconnecting,
disconnect the live wire first, and then disconnect the neutral
wire and the ground wire.
● Before opening the case or battery cover, remove the test
leads from the Meter first. Do not use the Meter when it is
disassembled or the battery cover is opened.
● The Meter can only be used with the equipped test leads to
meet the requirements of safety standards. If the test leads
are damaged and need to be replaced, replace only with the
same model and the same electrical specifications.
ELECTRICAL SYMBOLS
DIMENSIONS
AUTO POWER OFF
● If the meter is not in operation for 15 minutes, it will turn off
automatically. To turn it on again, simply rotate the range
switch or press any button.
The meter is very sensitive. It will be affected by nearby
magnetic fields. Without touching any objects, there may be a
reading jumping on the screen when it is turned on. This is a
normal occurrence for a digital meter and it does not affect the
measurement results.
HOW TO USE THIS MULTIMETER
● After the reading stabilizes, record it from the LCD screen.
-3-
● Use the rotary switch to select a function. Use the
FUNC Button to further select the function if there
are multiple functions in one rotary setting.
For example: Switching between AC and DC
voltage tests; Choosing between the diode,
resistance, and continuity tests.
NOTE: Pay special attention to the selected setting
before performing any tests.
● Turn the rotary switch to the OFF position to turn off the
Meter.
Ⅱ.MEASURING AC/DC VOLTAGE
● Insert the red test lead into the INPUT terminal and the
black test lead into the COM terminal.
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● Connect the meter in parallel to the circuit under test.
NOTE: If the reading is negative when measuring the DC
voltage, it means that the positive and negative poles of the
test leads are reversed, please change the test leads.
● After the reading stabilizes, record the reading from the LCD
screen.
● Turn the rotary switch to the OFF position to turn off the
Meter.
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Ⅲ.MEASURING RESISTANCE
● Insert the red test lead into the INPUT terminal and the
black test lead into the COM terminal.
● Connect the test leads to both ends of the circuit or resistor
under test (connect the leads to the resistance under test in
parallel).
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● After the reading stabilizes, record the reading from the LCD
screen.
● Turn the rotary switch to the OFF position to turn off the
Meter.
RESISTANCE NOTES
● Do not change the resistance while taking a measurement.
Doing so may damage the Meter and affect the test results.
● Do not test parallel circuits. The accuracy of the
measurement will be affected, and the results may not be
accurate.
● Do not directly measure the internal resistance of
micrometers, galvanometers, batteries, and other
instruments.
Ⅳ.MEASURING CAPACITANCE
● Insert the red test lead into the INPUT terminal and the
black test lead into the COM terminal.
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CAPACITANCE TIPS
● If the measured value is significantly different from the value
marked on the capacitor, the capacitor is damaged .
Ⅴ.CONTINUITY TEST
● Insert the red test lead into the INPUT terminal and the
black test lead into the COM terminal.
● Connect the test leads to both ends of the circuit or resistor
under test (connect the leads to the resistance under test in
parallel).
CAPACITANCE NOTES
● Before measuring the capacitor, discharge it to avoid
damage to the Meter. Do so by connecting the capacitor to a
high-powered resistor.
● Discharge the capacitor after measurement to avoid any
potential safety hazards.
● If the capacitance is large, it may take a long time for the
reading to stabilize.
● After the reading stabilizes, record the reading from the LCD
screen.
● Turn the rotary switch to the OFF position to turn off the
Meter.
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Ⅵ.DIODE TEST
● Turn the rotary switch to the OFF position to turn off the
Meter.
● Insert the red test lead into the INPUT terminal and the
black test lead into the COM terminal.
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DIODE TEST TIPS
● Is the diode functioning correctly? If the red test lead is
connected to the positive pole of the diode and the black
lead is connected to negative, then the diode should be in a
forward conduction state, and the displayed value is the
forward voltage drop.
● Normal diode forward pressure drops: the general silicon
tube is 0.5- 0.7 V, germanium tube is 0.15-0.3V.
● If "0000" is displayed, the diode is broken.
● You can also verify that the red test lead is connected to the
negative pole of the tested diode and the black test rod is
connected to the positive pole. The diode should display
“OL”.
● The LCD screen will display the approximate voltage drop
reading of the diode. If the test leads are connected
reversely, “OL” will be displayed on the LCD screen. Please
replace the test leads to measure again.
● Turn the rotary switch to the OFF position to turn off the
Meter.
● Connect the red test lead to the anode of the diode under
test and the black test lead to the cathode of the diode.
NOTE: Usually the anode of the diode is the longer end.
POLARITY JUDGMENT METHOD
● Switch the Multimeter to the Resistance setting.
● Connect the two test leads to the two electrodes of the
diode.
● Measure one result, then swap the positions of the test
leads, then measure the second result.
● The larger result is the reverse resistance and the smaller
result is the forward resistance. The smaller resistance is
when the black test lead is connected to the positive end of
the diode and the red lead is connected to the negative end.
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Ⅶ.NON-CONTACT VOLTAGE
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SPECIFICATIONS
32°F~104°F (0℃~40℃；
<80% RH，<10°C Non-condensing)
“ - ” Automatically displayed
“OL” Displayed
displayed when battery
voltage is lower than normal
Polarity Indication
Overload Indication
Low Battery
Indication
Work Environment
Storage
Temperature
Power
Weight
Dimensions
Safety/Compliance
14°F~122°F (-10℃~6℃；
<70% RH, Remove the Battery)
2 x 1.5V AAA Batteries
Approximately 203g
195×68×29mm
CAT.III 600V; Pollution Level: 2;
Altitude <2000m.
Auto or Manual
Range Selection
35X25mm
LCD Dimensions
2000，3½
3 Times/Second
Digital Display
Sampling Speed
Digital Clamp Meter
User Manual
Ⅰ.PRECISION INDEX
Reference Conditions: Ambient Temperature :18°C to 28°C,
Relative Humidity: ≤ 80%;Accuracy: (%rdg + dgts)
The accuracy is applicable within one year after calibration.
DETAILED SPECIFICATION
Ⅱ.DC VOLTAGE
Range
2V
Resolution
Accuracy
0.001V
20V
0.01V
200V
0.01V
±(0.5% rdg +5 dgts)
600V
1V
● Input Impedance: 10MΩ
● Overload Protection: 600V
● Maximum Measuring Voltage: 600V
Ⅲ.AC VOLTAGE
Range
Resolution
Accuracy
2V
0.001V
20V
0.01V
±(1.0% rdg +5 dgts)
200V
0.1V
600V
1V
● Input Impedance: 10MΩ
● Overload Protection: 600V
● Maximum Measuring Voltage: 600V
● Frequency Range: 40Hz ~ 1kHz
● Response: True RMS
● Overload Protection: 250 V
● Overload Protection: 250 V
2nF 0.001nF
20nF 0.01nF
200nF 0.1nF
±(4.0% rdg +5 dgts)
2μF 0.001μF
20μF 0.01μF
200μF 0.1μF
2mF 0.001mF
Range
Resolution
Accuracy
Ⅵ.CAPACITANCE
The buzzer inside the
Meter will beep if the
resistance<50Ω.
Open Circuit Voltage:
approximately 1.0V;
Overload Protection:
250V
Ⅶ.CONTINUITY TEST
The approximate diode
forward voltage value
will be displayed.
Reverse DC Voltage:
approximately 2.0V ;
Overload Protection:
250V
Ⅷ.DIODE TEST
● 1 x Owner’s Manual
● 1 x Pair of Test Leads
● 1 x Storage Bag
● 1 x AstroAI 2000 Counts CLAMP METER
INCLUDED IN BOX
HOW TO DISPOSE OF THE METER
If you at some point intend to dispose of this product, please
keep in mind that many of its components consist of valuable
materials which can be recycled. Please do not discard it in
the garbage bin, but check with your local authorities for
recycling facilities in your area.
3 Year Warranty Limited Warranty from AstroAI Each AstroAI
Digital Multimeter will be free from defects in material and
workmanship. This warranty does not cover fuses, disposable
batteries and damage from neglect, misuse, contamination,
alteration, accident, or abnormal conditions of operation or
handling, including overvoltage failures caused by use outside
the Multimeter’s specified rating, or normal wear and tear of
mechanical components. This warranty covers the original
purchaser only and is not transferable.
If this product is defective, please contact AstroAI Customer
Support at [e-mail].
VOLTAGE NOTES
● To avoid damage to the meter, do not measure voltage
exceeding 600V DC or 600V AC CATIII.
● If the AC setting is used to measure DC and vice versa, an
overflow symbol will be displayed. Performing this has the
potential to damage the Meter or any components you are
attempting to test.
● When measuring voltage, the result will fluctuate depending
on the power supply. Generally speaking, the result will
fluctuate ±10V, which is NOT an inaccurate result.
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● Turn the rotary switch to the OFF position to turn off the
Meter.
Ⅷ.LIVE WIRE DETECTION
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● Turn the rotary switch to the OFF position to turn off the
Meter.
MAINTENANCE
CLEANING THE METER
If there is dust or humidity in the terminals, it may produce
erroneous measurements. Please clean the Meter as follows:
● Turn off the power to the Meter and remove the test leads.
● Turn the meter over and shake out the dust accumulated in
the input jack, wipe the case with a damp cloth or mild
detergent. Wipe the contacts in each terminal with a clean
cotton swab dampened in alcohol.
● Touch the point to be measured with the tip of the red test
lead:When the indicator light is on, it means that the
measured position is live wire, please pay attention to your
safety! The reason that the green light is on may be that the
test lead is not fully connected to the socket. Please test
again after the test lead is fully connected.
NOTE: When the meter senses a weak AC signal, the LCD
screen will display “---L”, and the buzzer will emit a slow
beep; When the meter senses a strong AC signal, the LCD
screen will display “---H”, and the buzzer will emit a quick
beep.
● Move the NCV detector close to the point to be tested:
When the Meter senses a weak AC signal, the green
indicator light will be on, the buzzer will emit a slow, audible
beep and the screen will display “---L”; When the Meter
senses a strong AC signal, the red indicator light will be on,
the buzzer will emit a quick beep and the screen will display
“---H”.
NOTE: When the indicator light is on, it means there is
voltage, please pay attention to your safety!
Ⅳ.AC CURRENT
Ⅴ.RESISTANCE
● Frequency Range: 40Hz ~ 400Hz
● Response: True RMS
2MΩ 0.001MΩ
20MΩ 0.01MΩ
200Ω 0.1Ω
2kΩ 0.001kΩ
20kΩ 0.01kΩ
±(1.0% rdg +5 dgts)
200kΩ 0.1kΩ
Range
Resolution
Accuracy
Web:.astroai.com
E-mail:[e-mail]
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Ω
AC
(Alternating Current)
DC
(Direct Current)
AC and DC
Current
Earth Ground
Resistance
Continuity Test
Diode Test
Voltage
Non-Contact
Voltage Setting
NCV
Capacitance
Low Battery
Warning
Dangerous Voltage
may be present
A V
6.8cm
19.5cm
！
600V
CAT Ⅲ
！
MAX
600A~
3
Rotary Switch
NCV Detector
1
Transformer Jaws
2
Backlight Button
4
MAX/MIN Button
5
Flashlight Button
6
FUNC Button
7
Trigger
8
Display
9
Flashlight
10
DATA HOLD Button
11
Indicator Light
12
Test Leads
13
Storage Bag
14
COM Terminal
15
INPUT Terminal
16
H
1615
11
13
14
1
2
3
9
4
10
12
！
600V
CAT Ⅲ
！
MAX
600A~
5
6
7
8
！
600V
CAT Ⅲ
！
MAX
600A~
● Press this button while performing a test to hold
(freeze) the reading for easy recording. The screen
will display when the hold function is activated. Press
the button again to cancel the data hold.
H
● Press this button to turn on/off the flashlight.
● Press this button to turn on the MAX/MIN hold
function, and press it again to view the maximum
value and minimum value, respectively; Press and
hold the button for more than two seconds to exit
this function.
● Press this button to turn on/off the screen’s
backlight.
● Plug in the red test lead for all measurements.
● Plug the black test lead into this terminal.
INPUT Jack
COM Jack
BATTERY REPLACEMENT
● If the low battery sign appears on the LCD display, the
battery should be replaced. Remove the screws and open
the back case, replace the expended battery with fresh
batteries. (Size AAA, 1.5V x2).
NOTE: Replace batteries immediately to prevent inaccurate
readings due to low power. This also prevents potential
safety hazards.
NOTE
● To avoid damage to the Meter, do not measure voltage
exceeding 600V.
● Pay special attention to safety when measuring high voltage
to avoid electric shock or personal injury.
● Before using the Meter to test a known voltage or current,
confirm that the Meter functions work properly.
Ⅰ.MEASURING AC CURRENT
● Turn the rotary dial to the “ ” or “ ” setting. The
screen will display “ ” indicating that the measurement
function is AC current.
● Press the trigger to open the transformer
jaws, clamp the conductor to be tested, and
then slowly release the trigger until the
clamp head is completely closed.
Determine whether the conductor to be
tested is clamped in the center of the clamp
head. Additional errors will occur if the
conductor is not placed in the center of the
clamp head.
● Turn the rotary dial to the continuity test,
touch the red test lead and the black test
need to check whether they are normal. The
buzzer will beep and the indicator light will
come on if the test leads are normal.
● Turn the rotary dial to the continuity test,
touch the red test lead and the black test
lead to check whether they are normal. The
buzzer will beep and the indicator light will
be on if the test leads are normal.
● Turn the rotary dial to the “ ”
setting. The screen will display
“Ω” indicating that the
measurement function is
resistance.
● Turn the rotary dial to the continuity test,
touch the red test lead and the black test
lead to check whether they are normal. The
buzzer will beep and the indicator light will
be on if the test leads are normal.
● Turn the rotary dial to the “ ”
setting. Press the FUNC button
to switch to capacitance test.
The screen will display “n F”
indicating that the measurement
function is capacitance.
● Turn the rotary dial to the “ ” setting. The
screen will display “ ” indicating that the
measurement function is continuity. Touch
the red test lead and the black test lead to
check whether they are normal. The buzzer
will beep if the test leads are normal.
● Connect the test leads to both ends of the circuit
or resistor under test (parallel). If the resistance
of the circuit or resistor under test is connected
and less than 50Ω, the buzzer will emit a beep
and the measured resistance value will be
displayed on the LCD display.
● If the circuit or resistor under test is
disconnected, or the resistance value is
greater than 50Ω, the LCD screen will
display “OL”.
● Turn the rotary dial to the continuity test,
touch the red test lead and the black test
lead to check whether they are normal. The
buzzer will beep and the indicator light will
come on if the test leads are normal.
● Turn the rotary dial to the “ ”
setting. Press the FUNC button
to switch to the diode test. The
screen will display “ ” indicating
that the measurement function is
diode.
● Turn the rotary dial to the
“NCV/Live” setting. The screen
will display “NCV” indicating that
the measurement function is non-
contact voltage.
● Turn the rotary dial to the “NCV/Live”
setting. Press the “FUNC” button to switch
to live wire detection. The screen will show
“Live” indicating that the measurement
function is live wire detection.
Range
2A
Resolution
Accuracy
0.001A
20A
0.01A
50~60Hz :
±(2.5 rdg +5 dgts)
Other :
±(3.0% rdg +10 dgts)
200A
0.1A
400A
1A
2.9cm
H
-9-
● Turn the rotary dial to the “ ”
setting. The screen will display
“ ” indicating that the
measurement function is AC
voltage.
● Turn the rotary dial to the “ ”
setting. The screen will display
“ ” indicating that the
measurement function is DC
voltage.
● Insert the red test lead into the INPUT terminal.
DIAGRAM