AstroAI Auto Ranging 4000 Counts Digital Clamp Meter

Model: V1.0

A visual representation of the AstroAI Auto Ranging 4000 Counts Digital Clamp Meter. It features a clamp for measuring current, a digital display showing '4000', a rotary dial with various measurement settings, several buttons, and ports for test leads. The model is rated for CAT III 600V and MAX 600A.

Thank you for purchasing the Auto Ranging 4000 Counts Digital Clamp Meter from AstroAI. This manual provides all safety information, operation instructions, specifications, and maintenance for the meter. The instrument performs AC/DC Voltage, AC/DC Current, Resistance, Audible Continuity, Diode, Frequency, Capacitance, CV, LIVE TEST, and Duty Cycle.

If you have any questions or concerns regarding your product, please contact AstroAI Customer Support at support@astroai.com.

NOTE: Fully read and understand this manual before using this Digital Multimeter.

This Digital Clamp Meter has been designed according to EN61010-1 for electronic measuring instruments with an over voltage category (CAT III 600V) and Pollution degree 2.

⚠️ WARNING

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:

• 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 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 a known voltage; do not use it if the readings are incorrect or the Meter is damaged.
• 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.
• Use the Meter according to the measurement category, voltage or current rating specified on the meter or manual.
• 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 in humid environments.
• When using the test leads, keep your fingers behind the finger guards.
• Do not measure the current when the 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 finally 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 the same model and the same electrical specifications.

ELECTRICAL SYMBOLS

SIZE

Dimensions: Approximately 7.7 inches (Height) x 2.7 inches (Width) x 1.1 inches (Depth). Rated for MAX 600A and 600V CAT III.

DIAGRAM

Labeled diagram of the clamp meter:

• 1: NCV Detector
• 2: Transformer Jaws
• 3: Flashlight
• 4: Trigger
• 5: FUNC Button
• 6: ZERO Button
• 7: LCD Screen
• 8: MAX/MIN Button
• 9: Backlight Button/Flashlight Button
• 10: Rotary Switch
• 11: OFF (Power Off)
• 12: AC/DC Current Test Setting
• 13: Frequency Test/Low Pass Filtering Setting
• 14: AC/DC Voltage Test Setting
• 15: Capacitance/Resistance Setting
• 16: Continuity Test/Diode Test Setting
• 17: Frequency Test/Duty Cycle Setting
• 18: NCV Detection Setting
• 19: Indicator Light
• 20: COM Terminal (Common)
• 21: INPUT Terminal (Positive Input)
• 22: HOLD Button
• 23: Test Leads
• 24: Storage Bag

GETTING TO KNOW YOUR DEVICE

BUTTONS FUNCTIONS

AUTO POWER OFF

Rotating the rotary switch from the OFF position to any gear will turn on the power. After 15 minutes of standby, the Meter will automatically power off. To turn it on again, rotate the range switch or press the ZERO button.

OPERATION INSTRUCTIONS

General Precautions:

• 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/DC CURRENT

Turn the rotary dial to the "A" (DC Current) or "~A" (AC Current) setting. The screen will display " " (indicating DC Current) or " " (indicating AC Current) respectively.

NOTE: Under the DC current function, press the ZERO button to reset the reading on the screen before measuring; "ZERO" will be displayed.

When measuring AC current, press the FUNC button to switch to AC current test. The screen will display " " indicating AC current. Pressing the FUNC button again can check the frequency and enter the low pass filtering (LPF) function. The screen will display "Hz" and " " respectively.

Procedure:

• Press the trigger to open the transformer jaws.
• Clamp the conductor to be tested.
• Slowly release the trigger until the clamp head is completely closed.
• Ensure the conductor to be tested is clamped in the center of the clamp head for accuracy. Additional error will occur if the conductor is not placed in the center.
• After the reading stabilizes, record the reading from the LCD screen.
• 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.

Turn the rotary dial to the "V" (DC Voltage) or "~V" (AC Voltage) setting. The screen will display " " (indicating DC Voltage) or " " (indicating AC Voltage) respectively.

NOTE: When measuring AC voltage, press the FUNC button to view the frequency and enter the low pass filtering (LPF) function. The screen will display "Hz" and " " respectively.

Procedure:

• Connect the meter in parallel to the circuit under test.
• NOTE: If the reading is negative when measuring 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.

VOLTAGE NOTES

• To avoid damage to the meter, do not measure voltage exceeding 600V DC or 600V AC CATIII.
• Pay special attention to the voltage setting of the Multimeter. The LCD screen will indicate whether the setting is in AC or DC. Use the "FUNC" button to choose the correct setting. If the AC setting is used to measure DC and vice versa, an overflow symbol ("OL") 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.

III. MEASURING RESISTANCE

Insert the red test lead into the INPUT terminal and the black test lead into the COM terminal.

Turn the rotary dial to the "Ω" (Resistance) setting. The screen will display " " indicating that the measurement function is resistance.

Procedure:

• Connect the test leads to both ends of the circuit or resistor under test (connect the leads to the resistance under test in parallel).
• 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.

Turn the rotary dial to the " " (Capacitance) setting. Press the FUNC button to switch to capacitance test. The screen will display "n F" indicating that the measurement function is capacitance.

Procedure:

• Connect the test leads to both ends of the circuit or capacitor under test (connect the leads in parallel).
• After the reading stabilizes, record the reading from the LCD screen.
• Turn the rotary switch to the OFF position to turn off the Meter.

CAPACITANCE TIPS & NOTES

• If the measured value is significantly different from the value marked on the capacitor, the capacitor is damaged.
• Before measuring the capacitance, discharge the capacitor 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.

V. CONTINUITY TEST

Insert the red test lead into the INPUT terminal and the black test lead into the COM terminal.

Turn the rotary dial to the " " (Continuity) 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.

Procedure:

• 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 switch to the OFF position to turn off the Meter.

VI. DIODE TEST

Insert the red test lead into the INPUT terminal and the black test lead into the COM terminal.

Turn the rotary dial to the " " (Diode Test) setting. Press the FUNC button to switch to diode test. The screen will display " " indicating that the measurement function is diode.

Procedure:

• 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.
• 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.

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 0.5-0.7V, 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".

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.

VII. FREQUENCY TEST

Insert the red test lead into the INPUT terminal and the black test lead into the COM terminal.

Turn the rotary dial to the "Hz/%" (Frequency) setting. The screen will display "Hz" indicating that the measurement function is frequency.

Procedure:

• Connect the test leads in parallel to both ends of the tested power supply or circuit.
• After the reading stabilizes, record the reading from the LCD screen.
• Turn the rotary switch to the OFF position to turn off the Meter.

VIII. DUTY CYCLE TEST

Insert the red test lead into the INPUT terminal and the black test lead into the COM terminal.

Turn the rotary dial to the "Hz/%" setting. Press the FUNC button to switch to duty cycle test. The screen will display " % " indicating that the measurement function is duty cycle.

Procedure:

• Connect the test leads in parallel to both ends of the tested power supply or circuit.
• After the reading stabilizes, record the reading from the LCD screen.
• Turn the rotary switch to the OFF position to turn off the Meter.

IX. NON-CONTACT VOLTAGE (NCV)

Turn the rotary dial to the "NCV/Live" setting. The screen will display "NCV" indicating that the measurement function is non-contact voltage.

Procedure:

• 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!

Turn the rotary switch to the OFF position to turn off the Meter.

X. LIVE WIRE DETECTION

Insert the red test lead into the INPUT terminal.

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.

Procedure:

• 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.

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.

REPLACING THE BATTERY

• Turn off the Meter and remove the test leads.
• Unscrew the screws fixing the battery cover with a screwdriver, and remove the battery cover.
• Remove the old battery and replace it with a new battery of the same specification.
• Put the battery cover back to its original position and fix the battery cover with the removed screws.
• Battery Type: 2 x 1.5V AAA Batteries

SPECIFICATIONS

DETAILED SPECIFICATION

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.

II. DC VOLTAGE

Input Impedance: 10MΩ

Overload Protection: 600V

Maximum Measuring Voltage: 600V

III. AC VOLTAGE

Input Impedance: 10MΩ

Overload Protection: 600V

Maximum Measuring Voltage: 600V

Frequency Range: 40Hz ~ 1kHz

Response: True RMS

IV. DC CURRENT

V. AC CURRENT

Frequency Range: 40Hz ~ 400Hz

Response: True RMS

VI. RESISTANCE

Overload Protection: 250V

VII. CAPACITANCE

Overload Protection: 250V

VIII. FREQUENCY/DUTY CYCLE

FREQUENCY MEASUREMENT BY "Hz" SETTING

Measuring range: 0 ~ 4MHz

Voltage range: 0.2~10V AC (the higher the measured frequency, the higher the voltage should be)

Overload Protection: 250V

FREQUENCY MEASUREMENT BY "V" SETTING

Measuring range: 0 ~ 100 kHz

Voltage range: 0.5~600V AC (the higher the measured frequency, the higher the voltage should be)

Overload Protection: 250V

FREQUENCY MEASUREMENT BY "A" SETTING

Measuring range: 0 ~ 1kHz

Signal range: 1/4 range (the higher the measured frequency, the higher the current should be)

IX. CONTINUITY TEST

The buzzer inside the Meter will beep if the resistance < 50Ω.

Open Circuit Voltage: approximately 1.0V;

Overload Protection: 250 V

X. DIODE TEST

The approximate diode forward voltage value will be displayed.

Reverse DC Voltage: approximately 2.0V ;

Overload Protection: 250V

INCLUDED IN BOX

• 1 x Owner's Manual
• 1 x Pair of Test Leads
• 1 x Storage Bag
• 1 x AstroAI 4000 Counts CLAMP METER

HOW TO DISPOSE OF THE METER

If you 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.

WARRANTY

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 over-voltage 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 support@astroai.com.

Web: www.astroai.com

E-mail: support@astroai.com