1. Introduction
The ANENG A3003 is a high-precision, multi-functional pen-type digital multimeter designed for electrical measurements. It offers a wide range of functions including AC/DC voltage, resistance, capacitance, frequency, non-contact voltage (NCV) detection, zero fire detection, and continuity testing. Its compact design and smart features make it an essential tool for both professionals and DIY enthusiasts.

Figure 1: ANENG A3003 Pen Type Multimeter highlighting its core functions.
2. Safety Information
Please read and understand all safety information before operating this multimeter. Failure to follow these instructions may result in electric shock, fire, or damage to the meter.
- Always ensure the meter is in the correct function and range for the measurement.
- Do not apply voltage exceeding the maximum rated voltage between the terminals or between any terminal and earth ground.
- Use caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
- Do not use the meter if it is damaged or if the test leads are damaged.
- Ensure the battery cover is securely closed before operation.
- Do not operate the meter in explosive gas, vapor, or dusty environments.
- Always disconnect the test leads from the circuit before changing functions.
3. Package Contents
Verify that all items are present in your package:
- 1 x ANENG A3003 Pen Type Multimeter
- 1 x Test Lead (Negative black test lead)
- 1 x User Manual

Figure 2: Package contents including the multimeter, test lead, and manual.
4. Product Overview
The ANENG A3003 features a user-friendly design with clear controls and a digital display. Key components include:
- Removable Cap: Protects the positive red test lead.
- Smart Meter: Automatically identifies measurement type.
- HOLD/* Button: Single press for Data Hold, Long press for Flashlight/Backlit Screen.
- SELECT Button: Function switch button.
- Hz Button: For frequency measurement.
- Power Button: Single press to turn on, Long press to shut down.
- LED Digital Display Screen: Shows measurement readings.
- Backlit Screen: For visibility in low-light conditions.
- Low Battery Symbol: Indicates when battery replacement is needed.
- Positive Red Test Lead End: Integrated into the pen tip.
- Negative Black Test Lead Socket: For connecting the external test lead.

Figure 3: Detailed view of the multimeter's components and controls.

Figure 4: Product dimensions (Length: 204mm/8.03in, Width: 39mm/1.53in, Thickness: 24.4mm/0.96in).
5. Setup
5.1 Battery Installation
The ANENG A3003 requires 2 AAA batteries (not included). To install or replace batteries:
- Locate the battery compartment on the back of the multimeter.
- Open the battery cover.
- Insert 2 AAA batteries, ensuring correct polarity (+/-).
- Close the battery cover securely.
5.2 Connecting Test Leads
The multimeter comes with an integrated red test lead and a detachable black test lead.
- Insert the negative black test lead into the 'COM' socket at the bottom of the multimeter.
- The positive red test lead is integrated into the pen tip.
6. Operating Instructions
The ANENG A3003 features an 'Auto Range' mode for simplified operation, automatically detecting the measurement type. You can also manually select functions using the 'SELECT' button.
Video 1: Demonstration of various measurement functions of the ANENG A3003 multimeter.
6.1 Power On/Off
- Power On: Single press the Power button (
). - Power Off: Long press the Power button.
- Automatic Shutdown: The device will automatically shut down after 15 minutes of no operation to save power.
6.2 DC Voltage Measurement
To measure DC voltage:
- Turn on the multimeter. It will typically enter 'Auto Range' mode.
- Connect the red test lead to the positive terminal and the black test lead to the negative terminal of the DC source.
- Read the voltage value on the display.

Figure 5: Example of DC voltage measurement on a 9V battery.
6.3 AC Voltage Measurement
To measure AC voltage:
- Turn on the multimeter.
- Insert the red test lead into one hole of the AC source and the black test lead into the other hole.
- Read the voltage value on the display.

Figure 6: Example of AC voltage measurement on a household circuit (e.g., 220V).
6.4 Resistance Measurement
To measure resistance:
- Turn on the multimeter.
- Place the test leads at both ends of the component to be measured.
- Read the resistance value on the display.

Figure 7: Example of resistance measurement.
6.5 Capacitance Measurement
To measure capacitance:
- Turn on the multimeter.
- Place the test leads on the terminals of the capacitor.
- Read the capacitance value on the display.

Figure 8: Example of capacitance measurement (e.g., 10uF).
6.6 Frequency (Hertz) Measurement
To measure frequency:
- Turn on the multimeter.
- Connect the test leads to the circuit where frequency needs to be measured.
- The display will show the frequency in Hertz (Hz).

Figure 9: Example of Hertz measurement.
6.7 Non-Contact Voltage (NCV) Induction Detection
To detect AC voltage without contact:
- Ensure the multimeter is in NCV mode (often indicated by 'EF' on the screen).
- Bring the tip of the multimeter close to the wire or outlet.
- If AC voltage is detected, the screen will show '---' and an audible alarm will sound, accompanied by a red LED light. If no AC voltage, 'EF' will be displayed.

Figure 10: NCV induction detection in action.
6.8 Zero Fire Detection
To detect live (fire) and neutral (zero) lines:
- Ensure the multimeter is in 'EF' interface (NCV mode).
- Insert the red test lead into the test port of the outlet.
- For a live line, the red LED will flash and an alarm sound will be emitted.
- For a zero line, 'EF' will be displayed on the screen.

Figure 11: Zero fire detection and line continuity detection.
6.9 Line Continuity Detection
To check for circuit continuity:
- Turn on the multimeter.
- Place the test leads at both ends of the wire or component.
- If the wire is normal (continuous), the red LED light will be on and a buzzer will sound. If there is no response, the wire is disconnected.
6.10 Data Hold and Backlight/Flashlight
- Data Hold: Single press the 'HOLD/*' button to freeze the current reading on the display. Press again to release.
- Backlight/Flashlight: Long press the 'HOLD/*' button to turn on the screen backlight and the integrated flashlight. Long press again to turn off. This is useful for working in dark environments.

Figure 12: Screen backlight and flashlight features for improved visibility.
7. Specifications
| Feature | Range | Accuracy |
|---|---|---|
| Brand | ANENG | |
| Model | A3003 | |
| Max Display | 4000 counts | |
| DC Voltage | 4V/40V/400V | ±(0.8%+3) |
| 600V | ±(1%+3) | |
| AC Voltage | 4V/40V/400V | ±(1%+3) |
| 600V | ±(1.2%+5) | |
| Capacitance | 4nF/40nF/400nF/4uF/40uF/400uF | ±(3%+5) |
| 4mF | ±(5%+10) | |
| Resistance | 4kΩ/40kΩ/400kΩ/4MΩ | ±(1%+5) |
| 40MΩ | ±(1.2%+8) | |
| Frequency | 40Hz/400Hz/4kHz/40kHz/400kHz | ±(0.8%+8) |
| 4MHz | ±(1.2%+8) | |
| Operating Mode | Auto Range | |
| Operating Temperature | 0 - 40 ℃ | |
| DIY Supplies | Electrical | |
| Certification | CE | |
| Origin | Mainland China | |
| Battery Model | AAA*2 (not included) | |
| Product Size | 204*39*24.4mm / 8.03*1.53*0.96in | |
| Weight | 65.6g | |
| Material | ABS | |
| Pen Material | Brass / PVC | |
| Total length of line | 92cm/36.2in | |
Table 1: ANENG A3003 Multimeter Specifications.
8. Maintenance
8.1 Cleaning
To clean the multimeter, wipe the case with a damp cloth and a mild detergent. Do not use abrasives or solvents. Ensure the meter is completely dry before use.
8.2 Battery Replacement
When the low battery symbol appears on the display, replace the batteries immediately to ensure accurate measurements. Refer to Section 5.1 for battery installation instructions.
8.3 Storage
If the meter is not to be used for a long period, remove the batteries to prevent leakage and damage to the device. Store the multimeter in a cool, dry place away from direct sunlight and extreme temperatures.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on | Dead or incorrectly installed batteries | Replace batteries, ensuring correct polarity. |
| Inaccurate readings | Low battery, incorrect function/range, poor test lead connection | Replace batteries, select appropriate function, ensure secure connections. |
| No NCV detection response | Not in 'EF' mode, no AC voltage present, too far from source | Switch to 'EF' mode, verify AC voltage, bring meter closer to source. |
| Buzzer not working for continuity | Open circuit, meter not in continuity mode | Check circuit for breaks, ensure meter is in continuity mode. |
10. User Tips
- For quick checks, rely on the 'Smart Meter' auto-ranging function.
- Always double-check your connections and selected function before taking a measurement, especially when dealing with live circuits.
- The compact pen-type design is ideal for tight spaces and one-handed operation.
- Utilize the flashlight feature when working in dimly lit areas to improve visibility and safety.
- Remember to long-press the power button to turn off the device completely, or it will auto-shutdown after 15 minutes of inactivity.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.





