1. Introduction
The TOOLTOP ET852C is a versatile and portable 3-in-1 instrument designed for a wide range of electrical and electronic testing applications. It integrates the functionalities of a 50MHz dual-channel oscilloscope, a 25000-count true RMS multimeter, and a 5MHz multi-waveform signal generator into a single compact device. Featuring a 3.2-inch high-definition color LCD display, the ET852C provides clear readings and rich visual colors, making it an essential tool for engineers, technicians, and hobbyists.
2. Safety Information
Please read and understand all safety instructions before operating the ET852C to prevent injury or damage to the device. Keep this manual for future reference.
- Always use the correct input terminals, function, range, and probes for your measurements.
- Do not apply voltage or current that exceeds the maximum ratings specified for the device. The device features anti-burn and overload protection, but exceeding limits can still cause damage.
- Ensure the device and probes are in good condition before use. Do not use if damaged.
- Avoid operating the device in wet or damp environments.
- Do not operate the device in explosive atmospheres.
- When measuring high voltages or currents, exercise extreme caution.
- Always disconnect power to the circuit under test before connecting or disconnecting probes, especially for current measurements.
- The device contains a built-in lithium battery. Do not disassemble, crush, heat above 60°C (140°F), or incinerate the battery.
3. Product Overview
The ET852C combines three essential test instruments into one portable unit. Below is an overview of its components and key features.
3.1 Device Layout and Dimensions
3.2 Front Panel Components
- Display Screen
- Multi-functional buttons (F1, F2, F3, F4)
- Automatic setting/range switching (AUTO RANGE)
- Stop/Run or Output/Close or Relative Value (Play/Pause button)
- Power switch
- Menu/directional keys (Up, Down, Left, Right, MENU)
- Signal generator output connector (GEN Out)
- CH1, CH2 interfaces (Oscilloscope input terminals)
- Probe compensation output
- Charging/USB Type-C interface
- Save Settings/Data Preservation (SAVE HOLD)
- Switch button (MODE)
- Return button
- Input terminal of multimeter (MAX 10A FUSED, MAX 250mA FUSED, COM, VΩHz)
3.3 Key Features Summary
- Oscilloscope: Dual channel input, 50MHz bandwidth, 200MSa/s real-time sampling, 128Kbyte record length, max input voltage x1<150V, x10<300V (DC+AC peak), cursor measurement, multiple automatic measurement functions, YT/XY display modes, automatic/normal/single trigger modes, afterglow mode.
- Multimeter: 4 1/2 digit color screen with true effective value display, 25000 readings (9999 for capacitance), max input voltage AC: 750V DC: 1000V, max input current AC: 10A DC: 10A, automatic range, data retention.
- Signal Generator: Max waveform output frequency 5MHz, 6 waveform types (sine, square, triangular, half, full, saw tooth wave), 200MSa/s real-time sampling rate, 1Hz frequency resolution, 256Byte waveform length, 8-bit vertical resolution.
4. Setup
Before using your ET852C, please ensure it is properly set up and charged.
4.1 Package Contents
Verify that all items are present in your package:
- 1 x ET852C Oscilloscope Multimeter Signal Generator (Host)
- 2 x Passive Probes (for Oscilloscope)
- 1 x Test Leads (for Multimeter)
- 1 x Crocodile Clip Line
- 1 x USB Type-C Cable
- 1 x Storage Bag
- 1 x English User Manual
- 1 x Attachment (likely a small tool or accessory)
4.2 Charging the Device
The ET852C has a built-in 3.7V 2200mAh rechargeable lithium battery. To charge, connect the included USB Type-C cable to the device's charging/USB interface (component 10 in Figure 4) and to a standard USB power adapter (not included).
4.3 Initial Power On
Press and hold the Power switch (component 5 in Figure 4) to turn on the device. The color LCD display will illuminate, and the device will boot into its default mode.
4.4 Probe Compensation
Before making accurate oscilloscope measurements, it is recommended to perform probe compensation. Connect the oscilloscope probe to the CH1 or CH2 interface and the probe compensation output (component 9 in Figure 4). Adjust the probe until a stable square wave is displayed on the screen.
5. Operating Instructions
The ET852C offers three main operating modes: Oscilloscope, Multimeter, and Signal Generator. Use the MODE button (component 12 in Figure 4) to switch between these functions.
5.1 Oscilloscope Mode
This mode allows you to visualize and analyze electrical signals.
- Connecting Probes: Connect the passive probes to the CH1 or CH2 input interfaces (component 8 in Figure 4).
- Automatic Adjustment: For quick setup, press the "AUTO RANGE" button (component 3 in Figure 4). This function automatically adjusts the amplitude and frequency of the waveform, and sets the horizontal and vertical scales for optimal display.
- Trigger Mode: The device supports Automatic, Normal, and Single Time trigger modes. The trigger edge can be set to Rising or Falling.
- Afterglow Mode: This feature helps in capturing transient signals by retaining previous waveforms on the screen. Options include Minimum, 500ms, 1S, 10S, and Unlimited.
- Waveform Saving: The ET852C allows for one-click waveform screenshot saving. Saved waveforms can be exported to a computer via the USB Type-C interface.
5.2 Multimeter Mode
The multimeter function provides precise measurements of various electrical parameters.
- Connecting Test Leads: Connect the test leads to the appropriate multimeter input terminals (component 14 in Figure 4).
- Function Selection: Use the directional keys and MENU button to select the desired measurement function (DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Capacitance, Frequency, On-off Test, Diode Test).
- Automatic Ranging: The multimeter features automatic ranging for ease of use.
5.3 Signal Generator Mode
The signal generator can output various waveforms for testing circuits.
- Connecting Output: Connect the crocodile clip line or other appropriate cable to the Signal generator output connector (component 7 in Figure 4).
- Waveform Selection: Use the multi-functional buttons (F1-F4) and directional keys to select the desired waveform type (Sine, Square, Triangular, Half, Full, Sawtooth).
- Parameter Adjustment: Adjust the frequency and amplitude of the output signal as needed using the controls.
6. Maintenance
Proper maintenance ensures the longevity and accuracy of your ET852C.
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
- Battery Care: Recharge the lithium 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. Use the provided storage bag for protection.
- Fuse Replacement: The device has built-in double fuses for protection. If a fuse blows, it indicates an overload condition. Fuse replacement should only be performed by qualified personnel. Refer to the specifications for fuse type and rating.
7. Troubleshooting
If you encounter issues with your ET852C, try the following troubleshooting steps:
- Device does not power on: Ensure the battery is charged. Connect the device to a USB charger and try again.
- No display or dim display: Check battery level. Adjust display brightness if available in settings.
- Incorrect readings in Multimeter mode: Ensure test leads are correctly connected to the appropriate terminals and the correct function is selected. Check for damaged test leads.
- No waveform on Oscilloscope: Verify probes are securely connected to both the device and the circuit under test. Check probe attenuation settings. Ensure the trigger settings are appropriate for the signal. Try the "AUTO RANGE" function.
- Signal Generator not outputting: Ensure the output cable is correctly connected and the signal generator function is active with appropriate parameters set.
- Device unresponsive: Try performing a soft reset by holding down the power button for an extended period (e.g., 10-15 seconds) until the device restarts or powers off.
8. Specifications
Detailed technical specifications for the ET852C are provided below.
8.1 General Specifications
| Characteristic | Description |
|---|---|
| Display type | 3.2-inch color LCD display |
| Resolution | 320*240 Pixels |
| Power supply | 3.7V 2200mAh rechargeable lithium battery |
| Work environment | 0°C~40°C |
| Relative humidity | <80% |
| Product size | 181*89*40mm |
| Product weight | About 380g (excluding battery) |
8.2 Oscilloscope Parameters
| Characteristic | Description |
|---|---|
| Bandwidth | 50MHz |
| Sampling rate | 200MSa/s (Real-time sampling) |
| Number of channels | 2 (Dual channel) |
| Input Coupling | AC, DC |
| Input impedance | 1MΩ@16pF |
| Probe Attenuation | x1, x10, x100 |
| Max input voltage | x1: 150V, x10: 300V |
| Sampling rate range | 1.5MSa/s |
| Waveform interpolation | (Sinx)x |
| Scanning speed range | 10ns/div - 20s/div |
| Time base accuracy | 20ppm |
| Record length | Up to 128Kbyte |
| Sensitivity | 20mV/div - 10V/div |
| Displacement range | 4 grids (positive and negative) |
| Analog bandwidth | 50MHz |
| Low-frequency response | Greater than 10Hz |
| Rise time | Less than 10ns |
| DC gain accuracy | ±3% |
| Automatic measurement | Cycle, frequency, peak to peak value, maximum value, minimum value, root mean square, duty cycle, average value |
| Trigger Mode | Automatic, normal, single time |
| Trigger edge | Rising edge, falling edge |
| Signal generator output | Sine wave, square wave, triangular wave, half wave, full wave, sawtooth wave |
| Display mode | YT, XY |
| Afterglow Mode | Minimum, 500ms, 1S, 10S, Unlimited |
8.3 Multimeter Parameters
| Function | Range | Accuracy |
|---|---|---|
| DC voltage (mV) | 25.000mV/250.00mV | ±(0.05%+5) |
| DC voltage (V) | 2.5000V/25.000V/250.00V/1000.0V | ±(0.1%+10) |
| DC Current | 25.000mA/250.00mA/2.5000A/10.000A | ±(0.5%+10) |
| AC voltage (mV) | 25.000mV/250.00mV | ±(0.5%+8) |
| AC voltage (V) | 2.5000V/25.000V/250.00V/750.0V | ±(0.5%+10) |
| AC current (mA) | 25.000mA/250.00mA | ±(0.5%+10) |
| AC current (A) | 2.5000A/10.000A | ±(0.8%+10) |
| Resistance | 250.00Ω/2.5000KΩ/25.000KΩ/250.00KΩ/2.5000MΩ/25.000MΩ/250.0MΩ | ±(1.0%+10) |
| Capacitance | 9.999nF~99.99mF | ±(2.0%+10) |
| Frequency | 99.99Hz~999.9kHz | ±(0.1%+2) |
| On-off Test | The buzzer sounds for a long time | |
| Diode tube | Open circuit voltage is about 3.2V | |
| Digital display | 25000 readings/capacitance (9999 readings) |
8.4 Signal Generator Parameters
| Function | Describe |
|---|---|
| Sine wave | 1Hz~5MHz |
| Square wave | 1Hz~2MHz |
| Triangular wave | 1Hz~2MHz |
| Half-wave | 1Hz~2MHz |
| Full wave | 1Hz~2MHz |
| Sawtooth wave | 1Hz~500kHz |
| Sampling rate | 200MSa/s |
| Amplitude (50 Ω) | Sine wave: 0.3Vpp~3Vpp (1Hz~5MHz), 0.3Vpp~2.8Vpp (1Hz~5MHz) Square wave: 1Hz~3.99999MHz (1Hz~5MHz) Triangular wave: 1Hz~2MHz (1Hz~5MHz) Half-wave: 1Hz~1.7MHz (1Hz~5MHz) Full wave: 1Hz~1.7MHz (1Hz~5MHz) Sawtooth wave: 1Hz~300kHz (1Hz~500kHz) |
| DC offset range | 0 |
| Frequency resolution | 1Hz |
| Thoroughfare | 1 |
| Waveform length | 256Byte |
| Vertical Resolution | 8-bit |
| Output Impedance | 50Ω |
9. User Tips
- Explore Auto-Range: For beginners or quick checks, the "AUTO RANGE" feature in oscilloscope mode is incredibly useful for automatically scaling the waveform to fit the screen.
- Data Export: Remember to utilize the USB Type-C interface to export saved waveforms and data to your computer for further analysis or documentation.
- Battery Management: To maximize battery life, avoid leaving the device fully discharged for long periods. Charge it periodically even when not in use.
- Digital Manual: While a physical PDF manual might be sought after, this digital manual contains all necessary instructions and specifications for operating your ET852C.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
