ZOYI ZOTEK ZT-703S Dual-Channel Oscilloscope Multimeter
User Manual
Introduction
The ZOYI ZOTEK ZT-703S is a versatile dual-channel oscilloscope multimeter featuring a 3.5-inch IPS display with 25,000 counts and a built-in signal generator. It is designed for professional use in electronics testing and measurement.
Key Features
- 3.5-inch IPS display
- 25,000 counts
- Dual-channel oscilloscope
- Built-in signal generator
- USB Type-C charging and data transfer
- Wide voltage input range (AC 25V, DC 36V)
- ABS + TPE housing
Display Indicators
- ▶️ RUN: Indicates normal operation.
- ⏳ WAIT: Indicates a waiting state or process.
- T'D: Trigger delay or time domain indicator.
- ⏹️ STOP: Indicates the device has stopped measurement or is in a halted state.
- ⏸️ HOLD: Indicates a held or frozen display.
Button Functions and Navigation
The device features several buttons for control and navigation:
- 1️⃣ CH 1 / 2️⃣ CH 2: Selects the channel for oscilloscope or measurement functions.
- ? VOL/TIME (F1): Adjusts voltage sensitivity or time base settings.
- ➡️ MOVE (F2): Navigates through menus or adjusts cursor positions.
- ☰ MENU (F3): Accesses the main menu or specific function menus.
- ? SAVE/LOAD (F4): Manages saving and loading of settings or waveforms.
- ⚙️ AUTO/RANGE: Automatically sets the optimal range for measurements or oscilloscope display.
- ? REL (Relative): Sets a reference point for measurements.
- Cursor Buttons: Used for precise positioning on waveforms or measurements.
- Numeric Keys (0-9): Inputting values or selecting options.
- +/- Keys: Adjusting values or polarity.
Operating Modes
The ZT-703S supports multiple operating modes:
Oscilloscope Modes
- ⚙️ AUTO: Automatically configures the oscilloscope settings for optimal display.
- MANUAL: Allows manual adjustment of settings like range, time base, and trigger.
- NORMAL: Standard oscilloscope operation.
- SINGLE: Captures a single trigger event.
- ⏸️ HOLD: Freezes the current waveform display.
Measurement Modes
- ⚡ DC Voltage: Measures direct current voltage.
- ⚡ AC Voltage: Measures alternating current voltage.
- ⚡ DC Current: Measures direct current.
- ⚡ AC Current: Measures alternating current.
- Ω Resistance: Measures electrical resistance.
- Capacitance: Measures electrical capacitance.
- Hertz Frequency: Measures signal frequency.
- Diode Test: Tests diode forward voltage drop.
- Continuity Test: Checks for electrical continuity with an audible beep.
- Signal Generator: Outputs various waveforms (Sine, Square, Sawtooth, etc.).
Oscilloscope Functions
The oscilloscope functionality includes:
- Dual Channels: Simultaneous display and analysis of two signals.
- Bandwidth: 50 MHz analog bandwidth.
- Sampling Rate: Up to 280 MSa/s real-time sampling.
- Record Length: Up to 128K bytes per channel.
- Triggering: Auto, Normal, Single modes with rising/falling edge triggers.
- Display Modes: YT (Time Domain), XY (Lissajous figures), Roll mode.
- Persistence: Minimum, 500ms, 1S, 10S, Infinite.
- Measurements: Auto measurement of Period, Frequency, Peak-to-Peak, Max, Min, RMS, Duty Cycle, Pulse Count.
- Cursors: Time and Voltage cursors for precise measurements.
Signal Generator
The integrated signal generator can produce the following waveforms:
- Sine wave
- Square wave
- Sawtooth wave
- Half wave
- Full wave
Frequency and amplitude can be adjusted.
Technical Specifications
| Parameter | Specification |
|---|---|
| Display | 3.5-inch IPS LCD |
| Counts | 25,000 |
| Channels | 2 |
| Power Supply | Built-in rechargeable battery (18650) |
| Charging Port | USB Type-C (5V DC) |
| Housing Material | ABS + TPE |
| Dimensions | 177mm x 89mm x 40mm |
| Weight | Approx. 380g |
| Function | Range | Resolution | Accuracy |
|---|---|---|---|
| DC Voltage | 250mV - 750V | 0.0001V - 0.1V | ±(0.05%+3) - ±(2.0%+5) |
| AC Voltage | 250mV - 750V | 0.0001V - 0.1V | ±(0.5%+3) - ±(5.0%+20) |
| DC Current | 25mA - 10A | 0.001mA - 0.1A | ±(0.5%+3) - ±(5.0%+5) |
| AC Current | 25mA - 10A | 0.001mA - 0.1A | ±(0.8%+3) - ±(5.0%+5) |
| Resistance | 250Ω - 250MΩ | 0.001Ω - 0.1MΩ | ±(0.5%+3) - ±(5.0%+5) |
| Capacitance | 2.5nF - 25mF | 0.001nF - 0.1mF | ±(0.2%+3) - ±(5.0%+20) |
| Frequency | 10Hz - 40MHz | 0.001Hz - 0.01MHz | ±(1%+3) - ±(5.0%+20) |
| Diode Test | N/A | N/A | Test Voltage ~3V |
| Continuity Test | N/A | N/A | Audible beep if R < 50Ω |
| Characteristic | Description |
|---|---|
| Bandwidth | 50 MHz |
| Channels | 2 |
| Sampling Rate | 200 MSa/s (Normal), 280 MSa/s (High-speed) |
| Input Coupling | DC, AC |
| Input Impedance | 1MΩ, @16pF |
| Attenuation | X1, X10 |
| Max Input Voltage | X1: <150V, X10: <300V (DC+AC peak) |
| Time Base Range | 10ns/div - 20s/div |
| Vertical Sensitivity | 20mV/div - 10V/div |
| Record Length | Up to 128K bytes |
| Trigger Modes | Auto, Normal, Single |
| Trigger Edges | Rising edge, Falling edge |
| Display Modes | YT, XY, Roll |
| Persistence Modes | Minimum, 500ms, 1S, 10S, Infinite |
| Waveform | Frequency Range | Amplitude Range |
|---|---|---|
| Sine, Square, Sawtooth, Half wave, Full wave | (Adjustable) | (Adjustable) |
Battery and Charging
The ZT-703S is powered by a built-in 18650 rechargeable battery. It can be charged via the USB Type-C port using a 5V DC power adapter. The battery typically lasts for a significant duration, and charging is indicated on the display. Recommended charging is at 50-70% capacity for optimal battery health.
Safety Precautions
- Always ensure the correct measurement range is selected before connecting the device to a circuit.
- Do not exceed the maximum input voltage or current ratings specified for each function.
- Avoid using the device in environments with excessive dust, moisture, or extreme temperatures.
- Ensure proper grounding when measuring high voltages.
- Refer to the manual for detailed safety instructions.
