ANENG CM80/CM81 Digital Clamp Meter User Manual

1. Introduction

This product is a battery-powered, true-rms, auto ranging digital clamp multimeter with a 6000 counts LCD display and a backlight. It is designed for measuring AC current, AC/DC voltage, capacitance, resistance, frequency, NCV, diode, and continuity.

ANENG CM81 AC Current Clamp Meter highlighting key features like 600A AC current, AC/DC voltage, capacitance, resistance, Hz, diode, NCV, data hold.

Icons representing 12 functional diversifications: AC/DC voltage, AC current, Diode, Buzzer, NCV, Hz, Capacitance, Resistance, Hold, Flashlight, Automatic shut-down, Screen backlight.

2. Safety Information

To avoid possible electrical shock, fire, or personal injury, please read all safety information before you use the product.

Do NOT exceed the "maximum value" indicated in the Specification.
Examine the connection of the test leads and the insulation of the product before measuring voltage higher than 36V DC or 25V AC.
Disconnect the test leads from the circuit before changing the mode.
Misuse of mode or range can lead to hazards; be cautious. "OL" will be shown on the display when the input is out of range.
Do NOT input voltage at the Current Mode, the Resistance Mode, the Diode Mode, the Continuity Mode, or the Temperature Mode.
Do NOT use the product when the batteries or the battery cover is not placed properly.
Turn off the product and remove the test leads from the test points before changing batteries or fuses.

Safety Symbols:

Symbol	Description
⚠️	Hazardous Voltage
⏚	Earth
⧈	Double Insulated
🔋	Low Battery
⚡	Risk of Danger. Check the User Manual.
N/L	N/L Wire Judgement

3. Setup

3.1. Package Contents

Before using the device, please check the package contents:

1 x Digital Clamp Multimeter (CM80/CM81)
1 x Test Leads
1 x User Manual

Complete accessories included with the digital clamp meter.

3.2. Battery Installation

The device requires 2 AAA batteries (1.5V). To install or replace batteries:

Loosen the screw and remove the battery cover on the back of the device.
Insert new batteries, ensuring correct polarity.
Place the battery cover back and fasten the screw.

Product demonstration video showing unboxing, battery installation, and various measurement functions.

3.3. Connecting Test Leads

For most measurements (except AC current clamping and NCV), you will need to connect the test leads:

Connect the black test lead to the COM Terminal.
Connect the red test lead to the INPUT Terminal.

ANENG CM81 with test leads and electrical outlet — ANENG CM81 clamp meter with test leads, demonstrating its use near an electrical outlet.

4. Operating Instructions

4.1. Front Panel Overview

Detailed diagram of the ANENG CM81 clamp meter components — Detailed diagram of the ANENG CM81 clamp meter with numbered components and dimensions.

Clamp head: Used for non-contact AC current measurement.
Flashlight: Illuminates the measurement area.
Pliers wrench: Opens the clamp head.
Power Button (Short press to power on / Long press to power off): Controls the device's power.
NCV indicator: Lights up during non-contact voltage detection.
Data Hold / Backlight Button (H/☀): Short press to hold/cancel value; Long press (2 seconds) to turn backlight on/off. Also clears data in capacitive mode.
Function Selection Button (SELECT): Press to cycle through automatic identification mode, Hz, NCV, and Temperature modes. Long press (2 seconds) to return to automatic identification mode.
LCD display: Shows measurement readings.
COM: Negative input jack for test leads.
INPUT: Positive input jack for test leads.

4.2. Power On/Off and Auto Power Off

Power On: Short press the power button. The device enters automatic identification mode by default.
Power Off: Long press the power button for about 2 seconds.
Auto Power Off: The product automatically powers off after 15 minutes of inactivity. The built-in beeper will beep 5 times 1 minute before power off. To disable this function, hold down the "SELECT" button when turning on the product. You will hear five beeps if successfully disabled.

4.3. Measuring AC/DC Voltage

Connect the black test lead to the COM Terminal and the red test lead to the INPUT Terminal.
The device will automatically match DC or AC voltage.
Touch the probes to the correct test points of the circuit.
Read the measured voltage on the display.

Caution: Do not measure voltage that exceeds the MAX Value indicated in the Specifications. Avoid touching high voltage circuits during measurements.

Demonstration of AC voltage, DC voltage, Resistance, and Capacitance measurements using test pens.

4.4. Measuring AC Current

Power on. The device will automatically identify the current.
Pull the trigger of the clamp head, pass a single wire through the center of the tongs, and tighten the tongs.
The monitor displays the measured current value.

Caution: Do not measure current that exceeds the MAX Value. Measure only one wire at a time; current moving in different directions will cancel each other out, leading to inaccurate readings.

ANENG CM81 measuring AC current on a single wire, illustrating the clamp function.

Visual guide for correct vs. incorrect AC current measurement — Visual guide for correct (single wire) vs. incorrect (multiple wires) AC current measurement with the clamp.

4.5. Measuring Resistance and Continuity

Connect the black test lead to the COM Terminal and the red test lead to the INPUT Terminal.
Resistance will be identified automatically.
Touch the probes to the desired test points of the circuit.
The monitor displays the measured resistance value.
If the measured resistance value is less than 50 Ω, the device automatically enters Continuity mode, and the buzzer will sound.

Caution: Disconnect circuit power and discharge all capacitors before testing resistance. Do not input voltage in Resistance Mode.

4.6. Measuring Diode

Connect the black test lead to the COM Terminal and the red test lead to the INPUT Terminal.
Press the power button to start, then press the "SELECT" button once to enter DIODE measurement mode.
Connect the red probe to the anode side and the black probe to the cathode side of the diode to be tested.
The display shows the measured values.

Demonstration of diode measurement using test leads on LEDs.

4.7. Measuring Capacitance

Discharge all capacitors before testing capacitance.
Connect the black test lead to the COM Terminal and the red test lead to the INPUT Terminal.
Press the power button to start, then press the "SELECT" button twice to enter capacitance measurement mode.
Connect the red probe to one side and the black probe to the other side of the capacitor to be tested.
The monitor displays the measured capacitance value.

4.8. Measuring Frequency (Hz)

Connect the black test lead to the COM Terminal and the red test lead to the INPUT Terminal.
Press the power button to start, then press the "SELECT" button three times to enter "Hz" mode.
Use the test pens to measure the frequency of the line voltage.
The display screen shows the measured frequency.

Demonstration of Hz (Frequency) measurement by touching test pens to an electrical outlet.

4.9. Measuring NCV (Non-Contact Voltage)

Press the power button to start, then press the "SELECT" button four times to enter "NCV" mode.
Move the device around. The built-in beeper will beep when the inner sensor detects AC voltage nearby. The stronger the voltage, the quicker the beeper beeps.

ANENG CM81 performing NCV detection — ANENG CM81 performing NCV (Non-Contact Voltage) detection near a circuit breaker.

4.10. Temperature Measurement

Press the power button to start. Press the "SELECT" button 5 times to enter the "°C" mode, or 6 times to enter "°F" mode.
The temperature inside the meter is displayed on the screen. If measuring ambient temperature, allow time for the meter to stabilize.
To measure the temperature of other objects or liquids, insert the temperature probe into the "COM" and "INPUT" sockets, and use the detection end of the sensor to contact the measuring object.

4.11. Flashlight and Backlight

Flashlight: Long press the H/☀ button to turn on the flashlight.
Backlight: Long press the H/☀ button to turn on the screen backlight.

Clamp meter demonstrating the flashlight lighting feature — Close-up of the clamp meter demonstrating the flashlight lighting feature.

View of the HD backlit screen displaying 6000 counts.

5. General Maintenance

Beyond replacing batteries, do not attempt to repair or service the product unless you are qualified and have the relevant calibration, performance test, and service instructions.

Do not operate the product around hot, wet, flammable, explosive, or magnetic environments.
Clean the product with a damp cloth and mild detergent; do not use abrasives or solvents.
Remove the input signals before cleaning the product.
Remove the batteries if you will not use the product for a long time to prevent possible battery leak.
When the low battery symbol (🔋) is shown on the display, batteries shall be replaced.

6. Troubleshooting

If your product does not function as normal, the following steps may help you. If the problem still cannot be solved, please contact your dealer.

Problem	Possible Reason
Display Malfunction	Low battery; replace batteries
🔋 Symbol	Replace batteries
"OL" on display	Input is out of range for the selected mode.

7. Specifications

General Specifications

Feature	CM80	CM81
Display (LCD)	4000 counts	6000 counts
Ranging	Auto
Material	ABS
Update Rate	3 times/second
Data Hold	√
Low Battery Alert	√
Auto Power Off	√
NCV	NO	√
Diode	NO	√
Temperature	NO	√
Dimensions	185 x 65 x 32mm
Weight	136g (CM81) / 150g (CM80)
Battery Type	2 x 1.5V AAA batteries
Operating Temperature	0-40°C
Operating Humidity	< 75%
Storage Temperature	-20-60°C
Storage Humidity	< 80%

Electrical Specifications (CM81)

Function	Range	Resolution	Precision	MAX. Value	Frequency Response
DC Voltage (V)	6V/60V	0.001V/0.01V	±(1.0%+5d)	600V
DC Voltage (V)	600V	0.1V	±(1.2%+5d)	600V
AC Voltage (V)	6V/60V	0.001V/0.01V	±(1.3%+5d)	600V	40Hz~400Hz
AC Voltage (V)	600V	0.1V	±(1.5%+8d)	600V	40Hz~400Hz
AC Current (A)	6A	0.001A	±(2.5%+5d)	600A	40Hz~400Hz
	60A	0.01A	±(2.5%+5d)
	600A	0.1A	±(2.8%+8d)
Resistance	600.0Ω	0.1Ω	±(1.3%+5d)	60MΩ
	6.000kΩ	1Ω	±(1.0%+5d)
	60.00kΩ	10Ω
	600.0kΩ	100Ω
	6.000MΩ	1KΩ	±(1.5%+5d)
	60.00MΩ	10KΩ	±(1.5%+5d)
Capacitance	6.000nF	1pF	±(30%+5d)	40mF
	60.00nF	10pF
	600.0nF	100pF
	6.000uF	1nF
	60.00uF	10nF
	600.0uF	100nF	±(3.5%+5d)
	6.000mF/40.00mF	1uF/10uF	±(4.5%+8d) / ±(6%+10d)
Frequency (Hz)	10Hz	0.1Hz	±(3.0%+5d)	10mHz	10Hz~10MHz
	1kHz/10kHz	1Hz/10Hz	±(1.5%+5d)
	100kHz	100Hz	±(2.0%+5d)
	1MHz	1kHz	±(3.0%+5d)
	10.00MHz	10kHz	±(4.0%+10d)
Diode	DC forward current is 5mA, voltage is 2.8V
Continuity	No more than 50Ω
Temperature	0~400°C/32~752°F	±(3.0% +1°C)
Temperature	400~750°C/752~1382°F	±(3.5% +2 °C)

8. User Tips

Probe Connection: Always ensure test leads are securely connected to the COM and INPUT terminals before taking measurements.
Understanding Auto-Ranging: The meter automatically selects the appropriate range. If you see "OL" (Overload) on the display, it means the input is out of the current range or the maximum measurable value for that function.
AC Current Measurement: Remember to clamp around only a single conductor for accurate AC current readings. Clamping around multiple wires (e.g., live and neutral together) will result in a zero reading as the magnetic fields cancel out.
Capacitor Discharge: Always discharge capacitors before measuring their capacitance to prevent damage to the meter or injury.

9. Warranty and Support

Limited Warranty and Limitation of Liability

Customers enjoy a one-year warranty from the date of purchase. This warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling.

For further assistance or detailed information, please refer to the official user manual PDF: View User Manual (PDF)

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ANENG CM80/CM81