1. Introduction
Thank you for choosing the ZOYI ZT-702S 2-in-1 Digital Oscilloscope Multimeter. This device combines the functionality of a digital oscilloscope and a high-precision multimeter into a single, compact, and easy-to-use tool. It is designed for professionals and hobbyists alike, offering reliable measurements and waveform analysis for various electrical and electronic applications. Please read this manual thoroughly before operation to ensure safe and correct usage.
2. Safety Information
Always observe the following safety precautions when using the ZOYI ZT-702S:
- Ensure the device is in good working condition before use.
- Do not attempt to measure voltages or currents exceeding the specified maximum ratings.
- Use only the provided test leads and probes, or compatible accessories that meet safety standards.
- Avoid using the device in wet environments or in the presence of explosive gases or dust.
- Always disconnect power to the circuit under test before connecting or disconnecting test leads.
- Be cautious when working with high voltages; always assume circuits are live until proven otherwise.
- Replace the battery only with the specified type (18650 Lithium rechargeable battery).
3. Package Contents
Upon unpacking, please verify that all items listed below are present and undamaged:
- ZOYI ZT-702S Main Unit
- Color Box (Packaging)
- Cloth Bag (Carrying Case)
- Meter Pen (Test Leads)
- Temperature Probe
- Data Cable (USB Type-C)
- Oscillometric Probe
- 18650 Battery
- Instruction Manual
4. Product Overview
The ZOYI ZT-702S is a versatile 2-in-1 device featuring a 2.8-inch full-view color screen and a robust design for durability.
4.1 Key Features
- Display: 2.8-inch IPS full-view color screen (320x240 resolution) for clear visibility, even in strong outdoor light.
- Multimeter: 9999 counts, True RMS, Data retention.
- Oscilloscope: 10 MHz bandwidth, 48 MSa/s real-time sampling rate, Peak Voltage 400V.
- Protection: Double injection molding (ABS+TPE) with reinforced rib structure for enhanced durability.
- Power: 2000mAh Lithium rechargeable battery, Type-C charging.
- Convenience: One-key automatic waveform acquisition (Auto Range), one-key selection of multi-function interface (Menu), adjustable shutdown time.
4.2 Physical Description and Controls
The device is designed for easy handling with dimensions of approximately 177mm (height) x 89mm (width) x 40mm (depth).
Control Functions:
- Power On/Off Button: Located on the side for turning the device on or off.
- F1-F4 Buttons: Function buttons for specific operations within different modes.
- REL Button: Relative measurement function.
- AUTO RANGE Button: One-key automatic range selection for multimeter functions and waveform acquisition for oscilloscope.
- HOLD/SAVE Button: To hold current readings or save data.
- MODE Button: Switches between different measurement modes (e.g., Multimeter, Oscilloscope).
- MENU Button: Accesses the expanded menu of system functions.
- Arrow Keys: For navigation within menus and adjusting parameters.
Input Ports:
- 10A Input: For measuring high DC/AC currents (up to 10A).
- mA Input: For measuring milliamp DC/AC currents.
- COM Input: Common input port for all measurements.
- VΩHz-II Input: For measuring voltage, resistance, capacitance, diode, temperature, and continuity.
- CH1 Input (Top): BNC connector for oscilloscope probe.
- Type-C Port (Side): For charging and data transfer.
5. Setup
5.1 Battery Installation and Charging
The ZT-702S uses a 2000mAh 18650 Lithium rechargeable battery. Ensure the battery is correctly installed before first use.
- Open the battery compartment cover on the back of the device.
- Insert the 18650 battery, observing the correct polarity.
- Close the battery compartment cover securely.
- To charge, connect the provided Type-C USB cable to the side port of the device and to a suitable USB power adapter (not included). The charging status will be indicated on the screen.
5.2 Connecting Test Leads and Probes
- For multimeter functions, insert the black test lead into the 'COM' jack and the red test lead into the appropriate function jack (e.g., 'VΩHz-II' for voltage/resistance, 'mA' or '10A' for current).
- For oscilloscope functions, connect the oscillometric probe to the BNC connector at the top of the device.
- For temperature measurements, connect the temperature probe to the 'VΩHz-II' and 'COM' jacks.
6. Operating Instructions
6.1 Power On/Off
Press and hold the Power On/Off button located on the side of the device to turn it on or off.
6.2 Switching Modes
Press the 'MODE' button to switch between Multimeter mode and Oscilloscope mode. The current mode will be displayed on the screen.
6.3 Multimeter Mode Operation
In Multimeter mode, the device can measure various electrical parameters. Use the 'MODE' button to cycle through different measurement types (Voltage, Current, Resistance, etc.) and the 'AUTO RANGE' button for automatic scaling.
- DC/AC Voltage: Connect test leads to 'VΩHz-II' and 'COM'. Select voltage mode.
- DC/AC Current: Connect test leads to 'mA' or '10A' and 'COM'. Select current mode.
- Resistance: Connect test leads to 'VΩHz-II' and 'COM'. Select resistance mode.
- Capacitance: Connect test leads to 'VΩHz-II' and 'COM'. Select capacitance mode.
- Temperature: Connect temperature probe to 'VΩHz-II' and 'COM'. Select temperature mode.
- Diode/Continuity: Connect test leads to 'VΩHz-II' and 'COM'. Select diode or continuity mode.
- Frequency: Connect test leads to 'VΩHz-II' and 'COM'. Select frequency mode.
6.4 Oscilloscope Mode Operation
In Oscilloscope mode, the device displays waveforms for analysis.
- Connect the oscillometric probe to the CH1 BNC input.
- Press the 'MODE' button to enter Oscilloscope mode.
- Use the 'AUTO RANGE' button for automatic waveform acquisition and scaling.
- Use the arrow keys and function buttons (F1-F4) to adjust parameters such as VOLT/TIME, MOVE, TRIGGER, and AC/DC coupling.
7. Maintenance
7.1 Cleaning
To clean the device, use a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure the device is powered off and disconnected from any power source before cleaning.
7.2 Battery Care
To prolong battery life, charge the 18650 Lithium battery regularly. If the device will not be used for an extended period, it is recommended to fully charge the battery and store the device in a cool, dry place. Avoid extreme temperatures.
7.3 Storage
Store the ZT-702S in its protective cloth bag when not in use to prevent scratches and minor impacts. Keep it away from direct sunlight, high humidity, and extreme temperatures.
8. Troubleshooting
If you encounter issues with your ZOYI ZT-702S, please refer to the following common problems and solutions:
- Device does not power on: Check if the battery is properly installed and charged. Connect the Type-C charger to see if it powers on.
- Inaccurate readings: Ensure test leads are correctly connected to the appropriate jacks for the selected measurement mode. Check for damaged test leads or probes. Calibrate the device if necessary (refer to advanced settings in the menu).
- No waveform display in oscilloscope mode: Verify the oscillometric probe is securely connected to the CH1 BNC input. Ensure the probe is properly connected to the circuit under test. Adjust the VOLT/TIME and TRIGGER settings. Use 'AUTO RANGE' to attempt automatic setup.
- Screen is dim or unresponsive: Adjust screen brightness in the system settings. If unresponsive, try restarting the device.
- Battery not charging: Check the Type-C cable and power adapter. Ensure the charging port is clean and free of debris.
If the problem persists, please contact ZOYI customer support.
9. Specifications
Below are the detailed technical specifications for the ZOYI ZT-702S:
9.1 General Specifications
| Characteristic | Description |
|---|---|
| Display | 9999 Counts |
| Range | Auto+Manual |
| Material | ABS+TPE |
| Sampling Rate (Multimeter) | 3 times/sec |
| True RMS | Yes |
| Data Hold | Yes |
| Screen backlight | Yes |
| Auto Power Off | Yes |
| Low battery alert | Yes |
| Language | Chinese/English |
| Weight | 345g |
| Battery | 18650 Battery*1 |
| Dimensions | 177x89x40mm |
| Operating Temperature | 0 - 40 ℃ |
| Certification | CE, RoHS |
9.2 Multimeter Specifications
| Function | Measurement Range | Precision |
|---|---|---|
| DC Voltage | 9.999mV-999.9V | ±(0.5%+3) |
| AC Voltage | 9.999mV-750.0V | ±(1.0%+3) |
| DC Current | 9999μA-9.999A | ±(1.0%+3) |
| AC Current | 9999μA-9.999A | ±(1.0%+3) |
| Resistance | 99.99Ω-99.99MΩ | ±(0.5%+3) |
| Capacitance | 0.001nF-99.99mF | ±(2.0%+5) |
| Temperature | -20~1000℃ / -4~1832℉ | ±(2.5%+5) |
| Frequency | 0.01Hz-999.9KHz | |
| Diode | Yes | |
| On/Off beep | Yes |
9.3 Oscilloscope Specifications
| Characteristic | Description |
|---|---|
| Bandwidth | 10MHz |
| Sampling Method | Real-time sampling |
| Real-time Sample Rate | 48MSa/s |
| Number of Channels | 1 |
| Input Coupling | DC, AC |
| Input Impedance | 1MΩ, @16pF |
| Probe Attenuation | X1, X10 |
| Maximum Input Voltage | 150V (DC+AC peak) |
| Sampling Rate Range | 1.5Sa/s-48MSa/s |
| Waveform Interpolation | (sinx)x |
| Sweep Speed Range | 50ns/div-20s/div |
| Time Base Accuracy | 20ppm |
| Recording Length | Up to 65Kbyte |
| Sensitivity | 20mV/div-10V/div |
| Displacement Range | 4 cells (positive and negative) |
| Analog Bandwidth | 10MHz |
| Low Frequency Response | Greater than 10Hz |
| Rise Time | Less than 10ns |
| DC Gain Accuracy | ±3% |
| Automatic Measurement | Period, frequency, peak-to-peak, maximum, minimum, value, RMS |
| Trigger Method | Auto, Normal, Single |
| Trigger Edge | Rising Edge, Falling Edge |
10. User Tips
Based on general usage and product features, here are some tips for optimizing your experience with the ZOYI ZT-702S:
- Utilize the 'AUTO RANGE' feature frequently, especially when starting a new measurement, to quickly get a stable reading or waveform.
- For precise oscilloscope measurements, manually adjust the VOLT/TIME and TRIGGER settings after using auto-range to fine-tune the display.
- The 2.8-inch full-view color screen is designed for outdoor visibility; take advantage of this when working in bright conditions.
- Regularly transfer saved data to your computer via the Type-C connection to keep your device's memory clear and for detailed analysis.
- Always ensure the correct input jacks are used for current measurements (mA or 10A) to prevent damage to the device. The double ceramic fuse provides protection, but proper connection is key.
No specific user tips were available from external reviews or Q&A for this product.
11. Warranty and Support
ZOYI products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the warranty card included in your package or contact the official ZOYI customer service channels. Keep your purchase receipt as proof of purchase for warranty claims.
