1. Introduction
The TOOLTOP ET853C is a versatile 3-in-1 handheld device that integrates a digital oscilloscope, a true RMS multimeter, and a signal generator. Designed for electrical professionals and DIY enthusiasts, it offers a 70MHz analog bandwidth, 200Msps high-speed sampling, and a 20,000-count multimeter. This manual provides essential information for the safe and effective use of your ET853C.
Figure 1: TOOLTOP ET853C highlighting its 3-in-1 capabilities.
2. Package Contents
Before using the device, please check the package contents to ensure all items are present and undamaged. If any items are missing or damaged, please contact customer support.
- 1 x TOOLTOP ET853C Oscilloscope Multimeter Signal Generator
- 2 x Oscilloscope Probes
- 1 x Pair of Multimeter Test Leads
- 1 x USB Type-C Cable
- 1 x English User Manual
- 1 x Storage Pouch
- Small accessories (e.g., color rings, banana plugs)
Figure 2: Standard accessories included in the package.
3. Setup
3.1 Battery Installation and Charging
The ET853C is powered by a built-in rechargeable 18650 lithium battery. The battery is detachable for easy replacement. Ensure the battery is properly installed before first use.
- To charge the device, connect the provided USB Type-C cable to the charging port on the device and a standard 5V USB power adapter.
- A full charge provides approximately 4 hours of continuous use.
3.2 Initial Power On
Press and hold the power button to turn on the device. The TFT color screen will display the startup sequence. The device will typically default to the last used mode or a standard multimeter/oscilloscope view.
4. Operating Instructions
The ET853C features a rotary dial for mode selection and function buttons (F1-F4, AUTO, MENU, SAVE) for specific operations within each mode.
4.1 Oscilloscope Mode
To enter oscilloscope mode, turn the rotary dial to the 'Oscilloscope' position. Connect the oscilloscope probes to the CH1 and CH2 input ports as needed.
Figure 3: Dual-channel inputs (CH1, AWG, CH2).
- One-key Waveform Adjustment: Press the 'AUTO' button for automatic waveform adaptation and scaling.
- Amplitude and Timebase Adjustment: Use the F-buttons (F1-F4) to adjust vertical sensitivity (V/div) and horizontal timebase (s/div) manually.
- Measuring Multiple Waveforms: The device supports 12 waveform parameter measurements including Vpp, Vp, Vmax, Vmin, Vavg, Vrms, Freq, Period, +Width, -Width, +Duty, and -Duty. These parameters are displayed on the screen.
- Dual-Channel Measurement: Connect probes to both CH1 and CH2 to simultaneously measure two signals.
- Waveform Storage and Viewing: Press the 'SAVE' button to store waveform signals. The device can store up to 200 sets of waveform signals. Access stored waveforms via the 'MENU' button.
Video 1: Demonstration of oscilloscope functions including one-key adjustment, amplitude/timebase adjustment, multiple waveform measurement, dual-channel measurement, and waveform storage/viewing.
Figure 4: Waveform measurement display with various parameters.
Figure 5: Auto Oscilloscope function for quick waveform setup.
Figure 6: Waveform and data storage capabilities.
4.2 Signal Generator Mode
Turn the rotary dial to the 'Signal Generator' position. Connect the output to the circuit under test via the AWG port.
- Waveform Types: Generate Square, Sine, and Triangle waves.
- Frequency Adjustment:
- Sine Wave: 10Hz to 100kHz (stepped in 1-2-3-5 sequence)
- Triangle Wave: 10Hz to 100kHz (stepped in 1-2-3-5 sequence)
- Square Wave: 10Hz to 3MHz (stepped in 1-2-3-5 sequence)
- Output Amplitude: Adjustable to 3Vpp, 2Vpp, 1Vpp, 0.5Vpp, 0.2Vpp, 0.1Vpp, 0Vpp.
Figure 7: Signal Generator output options.
4.3 Multimeter Mode
Turn the rotary dial to the desired multimeter function (e.g., V~ for AC Voltage, V- for DC Voltage, A~ for AC Current, A- for DC Current, Ω for Resistance, etc.). Connect the test leads to the appropriate input jacks (VΩCx, mA, 10A, COM).
Figure 8: Input shift prompt to avoid operational errors when connecting test leads.
- AC Voltage Measurement: Select AC Voltage mode and connect test leads to measure AC voltage.
- MAX/MIN and REL Functions: Use the F-buttons to activate MAX/MIN recording or Relative measurement (REL) for comparing values.
- Resistance Measurement: Select Resistance mode (Ω) and connect test leads across the component to measure resistance.
- Diode Test: Select Diode mode and connect test leads to test diodes.
- Continuity Test: Select Continuity mode and connect test leads to check for circuit continuity (buzzer will sound for continuity).
- Capacitance Measurement: Select Capacitance mode (Cx) and connect test leads across the capacitor to measure capacitance.
- Frequency and Duty Cycle Measurement: Select Frequency (Hz) or Duty Cycle (%) mode to measure these parameters.
- Data Retention: Press the 'SAVE' button to store multimeter readings. The device can store up to 1000 sets of multimeter data.
Figure 9: Data retention feature for multimeter readings.
Figure 10: Multifunctional test capabilities of the multimeter.
5. Maintenance
5.1 Cleaning
Regularly clean the device with a soft, dry cloth. Do not use abrasive cleaners or solvents. Keep the screen free from dust and smudges for optimal visibility.
5.2 Battery Care
The 18650 lithium battery should be charged regularly, even if the device is not in use, to maintain battery health. Avoid fully discharging the battery for extended periods. If the device will not be used for a long time, remove the battery.
5.3 Fuse Replacement
The ET853C features intelligent anti-burn protection with dual fuses (200mA/250V and 10A/125V). If the current measurement functions stop working, the fuses may need replacement. Refer to the detailed instructions in the full user manual for safe fuse replacement procedures. Always use fuses with the correct ratings.
Figure 11: Smart anti-burning protection with dual fuses.
6. Troubleshooting
- Device does not power on: Ensure the 18650 battery is correctly installed and fully charged.
- No display or dim display: Check battery level. Adjust backlight brightness in settings.
- Incorrect multimeter readings: Verify test lead connections to the correct input jacks. Ensure the rotary dial is set to the appropriate measurement function. Check if fuses are blown for current measurements.
- Unstable oscilloscope waveform: Press the 'AUTO' button for automatic adjustment. Check probe connections and ensure proper coupling (DC/AC) and trigger settings.
- Signal generator output issues: Verify the output connection from the AWG port. Check selected waveform type, frequency, and amplitude settings.
For persistent issues, consult the full user manual or contact customer support.
7. Specifications
7.1 General Characteristics
- Display: 320x240 TFT color screen
- Backlight Brightness: Adjustable
- Battery: 18650 lithium battery
- Continuous Use Time: Approx. 4 hours
- Charging Standard: 5 V
- Charging Port: Type-C
- Input Impedance: 10MΩ
- Auto Sleep: 5-60 minutes or disabled
- Storage Capacity: 1000 DMM records, 200 Oscilloscope waveform records
- Storage Conditions: -10℃~+60℃; <90%RH
- Operating Environment: 0℃~+40℃; <75%RH
- Dimensions: 83 mm x 160 mm x 32mm
- Weight: About 220g
7.2 Oscilloscope Specifications
- Analog Bandwidth: 70 MHz (single channel), 40MHz (dual channel)
- Maximum Equivalent Sampling Rate: 200MspS
- Number of Channels: 2
- Input Impedance: Approx. 1MΩ
- Time Base Range: 6ns/div~50s/div
- Time Base Accuracy: ±(0.01% + 0.1div)
- Vertical Sensitivity Range: 50 mV/div to 10 V/div at MCX input
- Vertical Amplitude Accuracy: ±(5%+ 0.2div)
- Scan Modes: Auto/Normal/Single
- Trigger Edge Selection: Rising/Falling
- Coupling Modes: DC/AC
- Auto Setup: Automatically sets time base and vertical amplitude
- Voltage Measurement Parameters: Vp, Vmax, Vmin, Vpp, Vavg, Vrms
- Time Measurement Parameters: Freq, Period, +Width, -Width, +Duty, -Duty
7.3 Signal Generator Specifications
- Output Frequency:
- Sine Wave: 10Hz to 100kHz (stepped in 1-2-3-5 sequence)
- Triangle Wave: 10Hz to 100kHz (stepped in 1-2-3-5 sequence)
- Square Wave: 10Hz to 3MHz (stepped in 1-2-3-5 sequence)
- Output Amplitude: 3Vpp, 2Vpp, 1Vpp, 0.5Vpp, 0.2Vpp, 0.1Vpp, 0Vpp
7.4 Multimeter Specifications
- DC Voltage: 20.000mV/200.00mV/2V/20V/200V/1000V
- AC Voltage (True RMS): 20.000mV/200.00mV/2V/20V/200V/750V
- DC Current: 200.00uA/2000.0uA/20.000mA /200.00mA/2A/10A
- AC Current (True RMS): 200.00 uA/2000.0uA/20.000mA /200.00mA/2A/10A
- Resistance: 200Ω/2kΩ/20kΩ/200kΩ/2MΩ/20MΩ/200MΩ (Values above 50MΩ are for reference only)
- Capacitance: 9.999nF/99.99nF/999.9nF/9.999uF/99.99uF/999.9uF/9.999mF/99.99mF
- Frequency: 1.000Hz~20.000MHz (Above 20M for reference only)
- Diode Test: Open-circuit voltage approx. 3V, maximum test current approx. 2mA
- Continuity Test: Threshold resistance approx. 50Ω
- Fuse Ratings: 200mA/250V, 10A/125V
8. User Tips
- Always ensure the correct input jacks are used for multimeter measurements to prevent damage to the device or injury. The 'Input Shift Prompt' feature on the screen is a helpful visual guide.
- For stable oscilloscope readings, especially with noisy signals, utilize the 'AUTO' function first, then fine-tune the timebase and amplitude manually if needed.
- When using the signal generator, start with a low output amplitude and gradually increase it to avoid overdriving the circuit under test.
- Regularly back up important waveform and multimeter data to an external device if available, or note down critical measurements.
9. Warranty and Support
The TOOLTOP ET853C comes with a standard manufacturer's warranty. For detailed warranty terms, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official TOOLTOP website.
