GuliTech AOS05 3-in-1 Oscilloscope Multimeter User Manual

Introduction

The GuliTech AOS05 is a versatile 3-in-1 multifunctional test tool designed for engineers, technicians, and electronic enthusiasts. It integrates a digital oscilloscope, a signal generator, and a high-precision multimeter into a single compact device. This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your AOS05 device.

Safety Information

Please read all safety warnings and operating instructions carefully before using this device. Failure to follow these instructions may result in electric shock, fire, or damage to the device.

• Always ensure the device is powered off and disconnected from any power source before connecting or disconnecting test leads.
• Do not use the device if it appears damaged or if the insulation on the test leads is compromised.
• Observe all voltage and current ratings specified in the technical specifications. Exceeding these limits can cause damage to the device and pose a safety risk.
• Avoid operating the device in wet or damp environments.
• Do not attempt to repair or modify the device. Refer all servicing to qualified personnel.
• Use only the specified accessories and replacement parts.

Package Contents

Verify that all items are present and undamaged upon unpacking:

• GuliTech AOS05 3-in-1 Oscilloscope Multimeter
• Test Leads (Red and Black)
• Oscilloscope Probe
• USB Charging Cable
• User Manual

Device Overview

Familiarize yourself with the various components and controls of the AOS05 device.

Figure 1: Front and side view of the AOS05 device with numbered labels indicating key components and their functions.

1. Signal Generator Output: Port for outputting various waveforms.
2. CH1 Signal Input: Channel 1 input for oscilloscope measurements.
3. CH2 Signal Input: Channel 2 input for oscilloscope measurements.
4. Color LCD Display: 3.2-inch screen for displaying measurements and settings.
5. F1 ~ F4: Multifunction Keys: Press corresponding keys to select menu items in each mode.
6. AUTO Setup (Oscilloscope) / Range Switch (Multimeter): Automatically adjusts oscilloscope settings or switches measurement range in multimeter mode.
7. Run/Stop (Oscilloscope) / Signal Output ON/OFF / Relative Value (Multimeter): Controls oscilloscope operation, signal generator output, or relative measurement in multimeter mode.
8. Power Switch: Turns the device on or off.
9. Save/Hold (Multimeter): Saves data or holds the current reading in multimeter mode.
10. Oscilloscope / Signal Generator ↔ Multimeter Mode Switch: Toggles between the three main operating modes.
11. Back/Return: Navigates back in menus or exits a function.
12. Zoom/Pan: Adjusts the display zoom or pans the waveform.
13. Measure Menu (Oscilloscope) / Long-press to center waveform horizontally: Accesses measurement options or centers the waveform.
14. 10A Current (+) Input: Positive input terminal for 10A current measurements.
15. mA Current (+) Input: Positive input terminal for milliampere current measurements.
16. Black Test Lead (-) Input (COM): Common negative input terminal for all measurements.
17. Red Test Lead (+) Input (VΩHz): Positive input terminal for voltage, resistance, and frequency measurements.
18. Charging/USB Communication Port: For charging the internal battery and connecting to a computer.
19. Probe Compensation: 3V/1kHz Square Wave Output: Output for calibrating oscilloscope probes.

Setup

1. Charging the Device

The AOS05 features a built-in rechargeable battery. To charge, connect the provided USB charging cable to the Charging/USB Communication Port (18) on the device and to a standard USB power adapter (not included) or a computer's USB port. The charging indicator on the display will show the charging status. Ensure the device is fully charged before first use for optimal battery life.

2. Connecting Test Leads and Probes

Always ensure the device is powered off before connecting or disconnecting leads.

• For Multimeter Functions: Insert the black test lead into the COM (16) input. Insert the red test lead into the VΩHz (17) input for voltage, resistance, or frequency measurements. For current measurements, insert the red lead into the 10A (14) or mA (15) input as appropriate.
• For Oscilloscope Functions: Connect the oscilloscope probe to CH1 (2) or CH2 (3) input. Ensure the probe's ground clip is securely connected to the circuit's ground.
• For Signal Generator Functions: Connect the desired output cable to the Signal Generator Output (1).

3. Powering On/Off

Press and hold the Power Switch (8) for a few seconds to turn the device on or off. The device will boot up in the last used mode.

Operating Modes

The AOS05 features three primary operating modes: Oscilloscope, Signal Generator, and Multimeter. Use the Mode Switch (10) to toggle between these functions.

1. Oscilloscope Mode

This mode allows for waveform visualization and analysis with a 50MHz bandwidth and 200MSa/s real-time sampling rate across dual channels.

Figure 2: The AOS05 displaying dual-channel oscilloscope waveforms and multimeter readings.

• Connecting Probes: Connect oscilloscope probes to CH1 (2) and/or CH2 (3) inputs.
• Auto Setup: Press the AUTO button (6) to automatically adjust vertical scale, horizontal time base, and trigger level for a stable waveform display.
• Adjusting Settings: Use the F1-F4 multifunction keys (5) to navigate menus and adjust parameters like vertical sensitivity (Volts/Div), time base (Sec/Div), trigger settings, and coupling (AC/DC).
• Run/Stop: Press the RUN/STOP button (7) to pause or resume waveform acquisition.
• Measurements: Access the Measure Menu (13) to display automatic measurements such as Vpp, Vmax, Vmin, Frequency, Duty Cycle, etc.
• Zoom/Pan: Use the Zoom/Pan button (12) to magnify or move the displayed waveform.

2. Signal Generator Mode

The built-in signal generator can output 6 different waveforms for testing circuits.

Figure 3: The AOS05 operating in signal generator mode, outputting a waveform.

• Selecting Waveform: Use the F1-F4 keys (5) to select the desired waveform type (e.g., Sine, Square, Triangle).
• Adjusting Parameters: Adjust frequency, amplitude, and duty cycle using the multifunction keys.
• Output Control: Press the RUN/STOP button (7) to enable or disable the signal output.

3. Multimeter Mode

The multimeter function provides 25000 counts for high-precision measurements of voltage, current, resistance, capacitance, diode, and continuity.

Figure 4: Examples of the AOS05 performing various multimeter measurements.

• Connecting Leads: Ensure test leads are connected to the correct input terminals (COM, VΩHz, 10A, or mA) based on the desired measurement.
• Selecting Function: Use the F1-F4 keys (5) to select the specific measurement function (e.g., DCV, ACV, Resistance, Capacitance).
• Auto Range: Press the AUTO button (6) to enable or disable auto-ranging. When disabled, use the F1-F4 keys to manually select the range.
• Data Hold: Press the HOLD/SAVE button (9) to freeze the current reading on the display. Press again to release.
• Relative Measurement: Press the REL button (7) to measure the difference between the current reading and a stored reference value.

Maintenance

Proper maintenance ensures the longevity and accuracy of your AOS05 device.

• Cleaning: Use a soft, damp cloth with mild detergent to clean the device's exterior. Do not use abrasive cleaners or solvents. Ensure the device is powered off and disconnected from all leads before cleaning.
• Battery Care: Recharge the battery regularly, even if the device is not in frequent use, to maintain battery health. Avoid fully discharging the battery for extended periods.
• Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures. If storing for a long period, ensure the battery is partially charged (around 50%).
• Probe Compensation: Periodically check and adjust oscilloscope probe compensation using the 3V/1kHz square wave output (19) to ensure accurate waveform display.

Troubleshooting

If you encounter issues with your AOS05, refer to the following common problems and solutions:

• Device does not power on: Ensure the battery is charged. Connect the USB charging cable and try again. If the issue persists, contact support.
• No display or abnormal display: Check battery level. Try restarting the device. If the screen is blank, it might be in auto-power-off mode; press any button to wake it up.
• Inaccurate Multimeter readings: Verify test leads are correctly connected to the appropriate input terminals. Ensure the correct measurement function and range are selected. Check the battery level.
• Unstable Oscilloscope waveform: Adjust the trigger level and trigger mode. Use the AUTO button (6) to automatically set parameters. Ensure probes are properly compensated and connected. Check for external noise sources.
• Signal Generator output not working: Ensure the signal output is enabled via the RUN/STOP button (7). Verify the output cable connection.

Specifications

Detailed technical specifications for the GuliTech AOS05.

Figure 5: Multimeter Technical Specifications.

Warranty Information

The GuliTech AOS05 device comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or improper operation. Please retain your proof of purchase for warranty claims.

Support

For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact GuliTech customer support. Refer to the contact information provided with your product packaging or visit the official GuliTech website for the most up-to-date support details.

Online Resources: For additional resources, FAQs, and software updates, please visit the GuliTech support page.