1. Introduction
The ANENG AOS03 is a versatile handheld device that integrates the functions of an oscilloscope, a signal generator, and a multimeter into a single unit. It features a dual injection molding process for durability and a compact design for portability. The device is equipped with a 3.5-inch IPS full-view color display, providing clear readings and waveform visualization. With its superior performance and powerful functionality, the AOS03 is suitable for a wide range of electrical measurement and testing scenarios.
2. Safety Information
Always observe the following safety precautions to prevent electric shock, injury, or damage to the device:
- Ensure the device is powered off before connecting or disconnecting test leads.
- Do not exceed the maximum input ratings for any function. Refer to the specifications section for detailed limits.
- Use appropriate personal protective equipment (PPE), such as safety glasses and insulated gloves, when working with electrical circuits.
- Never use the device if it appears damaged or if the test leads are compromised.
- When measuring current, the multimeter must always be connected in series with the circuit. Connecting it in parallel will cause a short circuit and damage the device.
Current Measurement Precaution: When measuring electric current, it is crucial to connect the multimeter in series with the circuit. Avoid mixing voltage and current measurement methods. Use the appropriate current range (mA or 10A) and insert the red test lead into the corresponding current jack (mA or 10A) and the black test lead into the COM jack. If the current value is unknown, start with a higher range to prevent the multimeter from displaying an over-range '1'. Disconnect the circuit part where current is to be measured, then connect the red and black test leads in series to measure the current.
3. Package Contents
Verify that all items are present in your package:
- 1x ANENG AOS03 3-in-1 Oscilloscope Multimeter
- 1x User Manual
- 1x Storage Bag
- 1x Packaging Box
- 1x Extra Tip Pen
- 1x Oscilloscope Pen
- 2x Positioning Sleeves
- 8x Tag Rings
- 1x Probe Compensation Screwdriver
- 1x Alligator Clip Ground Lead
- 1x USB Data Cable (Type-C)
- 1x Pair of Test Leads (Red and Black)
4. Product Overview and Components
Familiarize yourself with the main components and controls of your ANENG AOS03 device:
- Dual channel input
- 3.5-Inch VA reverse color screen
- USB charging port/data cable connection
- Square wave input/ground terminal
- Function menu selection button (corresponds to top screen options)
- Switch/Multimeter function button (long press for relative value)
- Automatic waveform measurement/manual range switching
- Data hold/Save measurement data (long press to save)
- Oscilloscope/Multimeter mode switch
- Set value adjustment (up)
- Set value left/previous page
- Set value right/next page
- Set value down
- 10A current jack
- mA current jack
- Black test lead (negative) jack
- Red test lead (negative) jack
- Back support frame
- Anti-drop silicone layer
5. Setup
5.1. Battery Charging
The ANENG AOS03 is equipped with a built-in 3400mAh 3.7V 18650 lithium battery. Before first use, or when the low battery indicator appears, charge the device using the provided Type-C data cable. Connect the cable to the USB charging port (3) on the side of the device and to a suitable USB power source. The charging status will be indicated on the screen.
5.2. Initial Power On
Press the power button (located near F1) to turn on the device. The 3.5-inch IPS screen will illuminate and display the main interface. To power off, long-press the power button.
5.3. Language Selection
The device supports both Chinese and English languages. Refer to the on-screen menu or the detailed user manual for specific steps to navigate to the settings and change the language preference.
6. Operating Instructions
6.1. Multimeter Mode
To enter Multimeter mode, press the dedicated switch button (9) or long-press the switch/multimeter function button (6).
6.1.1. AC Voltage Measurement
Connect the red test lead to the VΩHz-f jack and the black test lead to the COM jack. Select the AC voltage (V~) gear. Connect the probes to the household AC voltage source in parallel.
6.1.2. DC Voltage Measurement
Connect the red test lead to the VΩHz-f jack and the black test lead to the COM jack. Select the DC voltage (V-) gear. Connect the probes to the positive and negative terminals of the battery or DC source in parallel.
6.1.3. AC Current Measurement
Connect the red test lead to the 10A or mA current jack (14 or 15) and the black test lead to the COM jack. Select the AC current (A~) gear. Measure the AC current by connecting the multimeter in series with the circuit, for example, with a light bulb.
6.1.4. DC Current Measurement
Connect the red test lead to the 10A or mA current jack (14 or 15) and the black test lead to the COM jack. Select the DC current (A-) gear. Measure the DC current by connecting the multimeter in series with the circuit, for example, with an LED strip.
6.1.5. Diode Measurement
Enter the diode test gear. Touch the positive and negative electrodes of the diode with the test pens. The display will show the forward voltage drop.
6.1.6. Resistance Measurement
Enter the resistance (Ω) gear. Connect the test leads across the component to measure its resistance value.
6.1.7. Capacitance Measurement
Enter the capacitance (F) gear. For safety, always short-circuit the capacitor to discharge it before connecting the test leads. Connect the test leads to both ends of the capacitor.
6.1.8. Buzzer (Continuity) Measurement
Enter the buzzer (continuity) gear. Touch the test leads to the points you want to check for continuity. A beep indicates a continuous path (low resistance), useful for checking fuse lines or circuit connections.
6.2. Oscilloscope Mode
To enter Oscilloscope mode, press the dedicated switch button (9) or long-press the switch/multimeter function button (6).
6.2.1. Dual Channel Waveform Detection
Connect the oscilloscope probes to the dual-channel input ports (1). Select automatic or manual measurement settings as needed. Press the SAVE button (8) for 2 seconds to save the displayed waveform data.
6.2.2. XY Display Mode
Navigate to the fifth page of the extended function menu. Press F1 to select the X-Y display mode. The screen will switch to display Channel 1 (CH1) and Channel 2 (CH2) perpendicular to each other, generating Lissajous figures that represent the frequency relationship between the two signals.
6.2.3. Computer View Waveform
To view saved waveforms on a computer, enter the menu on the third page and press F3 to access the data saving mode. Connect the Type-C data cable (3) from the oscilloscope to your computer. The waveforms can then be accessed and viewed from the 'Pic' folder on the device's disk drive, which will appear as a removable storage device on your computer.
6.3. Signal Generator Mode
6.3.1. Waveform Output
To generate waveforms, navigate to the menu on the sixth page. Press F1 to enter the extended application. Select the 'signal output' option and press the MENU key to confirm and begin generating the desired waveform.
6.3.2. Available Waveforms
The ANENG AOS03 can output the following 7 types of signal waveforms:
- Sine wave
- Square wave
- Triangular wave
- Half wave
- Full wave
- Sawtooth wave
- Arbitrary waveform (various complex waveforms)
Video 6.1: A brief overview of the ANENG AOS03's features and functions.
7. Specifications
7.1. Multimeter Technical Indicators
| Function | Range | Resolution | Precision |
|---|---|---|---|
| AC voltage (V) | 0V-750.0V | 0.0001V-0.1V | ±(0.5%+3) |
| DC voltage (V) | 0V-1000.0V | 0.0001V-0.1V | ±(0.05%+3) |
| AC/DC voltage (mV) | 25.000mV-250.00mV | 0.001mV-0.01mV | ±(0.05%+3) |
| AC/DC current (A) | 0A-10.000A | 0.0001A-0.001A | ±(0.5%+3) |
| AC current (μA/mA) | 25.000mA-250.00mA | 0.001mA-0.01mA | ±(0.8%+3) |
| DC current (mA) | 25.000mA-250.00mA | 0.001mA-0.01mA | ±(0.5%+3) |
| Resistance | 0Ω-250.0MΩ | 0.01Ω-0.1MΩ | ±(5.0%+5) |
| Capacitance | 0nF-99.99mF | 0.001nF-0.01mF | ±(5.0%+20) |
| Hz (detected in AC voltage gear) | 0Hz-999.9KHz | 0.01Hz-0.1KHz | ±(0.1%+2) |
| Diode/Buzzer | √ | Data retention | √ |
| Low battery indication | √ | Support frame | √ |
| USB charge | √ | True RMS | √ |
| Battery model | 3.7V 18650 Battery*1 | Weight | 380g |
| Data storage/viewing | USB Connect to computer | Material | ABS/TPE |
| Sampling rate | 3 times/second | Language optional | Chinese/English |
| Screen display | VA reverse color screen | Max count | 25000 Counts |
| Screen brightness can be adjusted | 30% 50% 80% 100% | Range | Auto/manual |
| Auto power off | Automatic shutdown time can be set (1 minute/10 minutes/30 minutes/60 minutes/120 minutes/shutdown (unlimited time)) |
7.2. Oscilloscope Technical Indicators
| Characteristic | Explain | Characteristic | Explain |
|---|---|---|---|
| Bandwidth | 50MHz | Sensitivity | 20mV/div-10V/div |
| Sampling Method | Real-time sampling | Offset Range | 4 grids (positive and negative) |
| Sampling Rate | 200M/280MSa/s | Analog Bandwidth | 50MHz |
| Channel | 2 | Low-frequency | More than 10Hz |
| Input coupling | DC, AC | Rise time | Less than 10ns |
| Input impedance | 1MΩ@16pf | DC gain accuracy | ±3% |
| Attenuation | X1, X10 | Auto measurement | Period/Frequency/Peak/Maximum/Minimum/RMS/Duty Cycle/Number of Pulses |
| Maximum input voltage | X1 range<150V, X10 range<300V(DC+AC peak) | Trigger Modes | Auto, normal, single |
| Rate Range | 1.5Sa/s-280MSa/s | Trigger Edges | Rising edge, falling edge |
| Interpolation | (sinx)x | Operating mode | Normal mode 200MSa/s, High-speed mode 280MSa/s |
| Sweep range | 10ns/div-20s/div | Display mode | YT / XY / Roll |
| Time Base | 20ppm | Afterglow mode | Minimum, 500ms, 1S, 10S, Infinite |
| Record length | Up to 128Kbyte | Signal generator output | Sine wave/square wave/sawtooth wave/half wave/full wave |
7.3. Environmental Specifications
| Environment | Characteristic | Value |
|---|---|---|
| Operating Environment | Temperature | 0~40℃ |
| Humidity | <75% | |
| Storage Environment | Temperature | -20~60℃ |
| Humidity | <80% |
8. Maintenance
- Cleaning: Keep the device clean and dry. Use a soft, damp cloth for cleaning; do not use abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures. If the device will not be used for an extended period, ensure the battery is partially charged before storage to prolong battery life.
- Battery Care: The device features double fuse protection (10A 250V/600mA 250V) for the lithium battery. Avoid over-discharging or over-charging the battery.
9. Troubleshooting
- Device not operating properly: If you encounter any issues during the use of the product, please record a detailed video of the product not operating normally and contact ANENG customer service. This will help their experts and technicians quickly diagnose the problem and provide a solution.
- Multimeter displays '1' (Over-range): If the multimeter shows '1' when measuring current, it indicates an over-range condition. Select a higher current range or ensure the measurement is correctly set up in series with the circuit.
- No waveform displayed on oscilloscope: Check that the oscilloscope probes are securely connected to both the device and the circuit under test. Verify the input coupling (AC/DC) and adjust the VOL/TIME and MOVE settings to properly scale and position the waveform on the screen. Ensure the signal source is active.
10. User Tips
- Capacitance Measurement Safety: Always short-circuit (discharge) capacitors before measuring their capacitance to prevent damage to the multimeter and ensure accurate readings.
- Current Measurement Connection: Remember that current measurements must always be performed with the multimeter connected in series with the circuit. Incorrect parallel connection can lead to device damage.
- Waveform Saving: Utilize the long-press function on the SAVE button (8) to quickly store important waveform data for later analysis or transfer to a computer.
11. Warranty and Support
ANENG provides comprehensive after-sales support for the AOS03. For any questions regarding product use, quality issues, or requests for replacement/refund, please contact ANENG customer service. When reporting an issue, providing detailed information or videos of the problem can significantly expedite the resolution process. Please note that issues arising from artificial damage may not be covered under standard support.
