1. Introduction
The HoldPeak BT-50M is a versatile 3-in-1 handheld device designed for engineers, hobbyists, and technicians. It integrates the functionalities of a dual-channel oscilloscope, a signal generator, and a True RMS multimeter into a single portable unit, offering comprehensive testing and diagnostic capabilities.
This device combines a 50MHz dual-channel oscilloscope, a 2MHz signal generator (supporting sine, square, triangle, pulse, and DC waveforms), and a True RMS multimeter with 12 functions. It features lab-grade precision with 280MSa/s sampling and 50MHz bandwidth for the oscilloscope, and ±0.5% DC voltage accuracy with a 6000-count display for the multimeter. The advanced signal generation allows output of 1Hz–2MHz waveforms with adjustable amplitude (0.1V–3V) and duty cycle (1%–100%), making it ideal for circuit testing and educational purposes. Its field-ready portability is enhanced by a 3.5-inch IPS color screen, compact dimensions (183×100×44mm) and light weight (460g), powered by a 4000mAh Li-ion battery with USB-C charging.
2. Safety Precautions
- Always ensure the device is powered off before connecting or disconnecting test leads and probes.
- When using oscilloscope probes, ensure the X1/X10 settings on the probe match the corresponding settings on the device to avoid inaccurate readings or potential damage.
- Do not exceed the maximum input ratings for voltage, current, or other parameters specified in the technical specifications.
- Operate the device within the specified operating temperature range of 0°C to 40°C.
- Avoid using the device in wet or damp environments, or where explosive gases or dust are present.
- Inspect test leads and probes for any damage (e.g., cracked insulation, exposed metal) before each use. Replace damaged accessories immediately.
- Do not attempt to repair or modify the device yourself. Refer all servicing to qualified personnel.
3. Package Contents
Verify that all items listed below are included in your package:
- 1× Handheld 3-in-1 Device (BT-50M)
- 1× Oscilloscope Probe
- 1× Set Test Leads (for Multimeter)
- 2× Spare Fuses
- 1× USB-C Cable
- 1× English Manual
4. Product Features
4.1. Oscilloscope
- Bandwidth: 50MHz (280MSa/s max)
- Channels: Dual (CH1/CH2)
- Timebase: 10ns/div–20s/div
- Trigger: Auto/Normal/Single, Edge (Rise/Fall)
- Display: 3.5-inch IPS color screen with 6000 counts
- Vertical Sensitivity: 20mV/div-10V/div
- Horizontal Record Length: Up to 128Kbyte
4.2. Multimeter
- DC Voltage Range: 60mV–1000V (±0.5%)
- AC Voltage Range: 60mV–750V (±1.0%)
- DC/AC Current Range: 60mA–10A (±1.2–1.5%)
- Resistance: 0.1Ω–60MΩ
- Capacitance: 1nF–60mF
- Additional Features: True RMS, Diode Test, Continuity
4.3. Signal Generator
- Waveforms: Sine, Square, Triangle, Pulse, DC
- Frequency: 1Hz–2MHz
- Amplitude: 0.1V–3V
- Duty Cycle: 1%–100% (for Square waveform)
5. Setup and Initial Use
5.1. Charging the Device
The BT-50M is equipped with a 4000mAh Li-ion battery. Before first use, it is recommended to fully charge the device. Connect the included USB-C cable to the device's USB-C port and plug the other end into a standard USB power adapter (not included) or a computer's USB port. The charging indicator on the device will show the charging status.
5.2. Powering On/Off
Press and hold the power button (usually located on the side or top) for a few seconds to turn the device ON or OFF. The IPS display will light up upon successful power-on.
5.3. Connecting Probes and Test Leads
- For Oscilloscope: Connect the oscilloscope probe to the BNC connector on the device. Ensure the probe's attenuation setting (e.g., X1, X10) matches the setting selected in the device's menu for accurate measurements.
- For Multimeter: Insert the red test lead into the 'VΩHz' or 'mA/10A' jack and the black test lead into the 'COM' jack, depending on the measurement type.
6. Operating Instructions
The BT-50M features a user-friendly interface with dedicated buttons for mode selection and function control. Use the 'MENU' button to navigate through options and the directional pad for adjustments.
6.1. Oscilloscope Mode Operation
To enter Oscilloscope mode, press the 'MODE' button until the oscilloscope interface is displayed. The screen will show waveforms and various parameters.
Key Display Elements:
- Running Status: Indicates if the oscilloscope is actively acquiring data.
- Time Base Scale: Shows the horizontal time division (e.g., 200us).
- Time Base Window: Represents the visible time duration on the screen.
- Horizontal Trigger: Indicates the trigger position on the horizontal axis.
- Waveform Movement: Allows adjustment of waveform position.
- Signal Generator Status: Shows if the signal generator is active.
- Battery Status: Displays current battery level.
- CH1 Channel Voltage: Vertical scale for Channel 1.
- CH2 Channel Voltage: Vertical scale for Channel 2.
- Trigger Channel: Indicates which channel is used for triggering.
Use the function buttons (F1-F4) and the 'MENU' button to adjust parameters like time base, vertical scale, trigger level, and trigger mode (Auto, Normal, Single, Edge).
6.2. Multimeter Mode Operation
Switch to Multimeter mode using the 'MODE' button. The display will show numerical readings. Select the desired measurement function (e.g., DCV, ACV, DCA, ACA, Resistance, Capacitance, Diode, Continuity) using the function buttons or 'MENU'.
- Voltage Measurement: Connect test leads in parallel with the circuit or component.
- Current Measurement: Connect test leads in series with the circuit. Ensure the correct current jack is used (mA or 10A).
- Resistance/Capacitance Measurement: Ensure the component is de-energized before connecting test leads.
- Diode Test/Continuity: Use for checking diode functionality and circuit continuity.
6.3. Signal Generator Mode Operation
Access Signal Generator mode via the 'MODE' button. You can generate various waveforms for testing circuits.
- Waveform Selection: Use the function buttons to choose between Sine, Square, Triangle, Pulse, or DC waveforms.
- Parameter Adjustment: Adjust the frequency (1Hz–2MHz), amplitude (0.1V–3V), and duty cycle (1%–100% for Square wave) using the controls.
- Output: The generated signal will be available at the dedicated signal output port.
7. Technical Specifications
| Category | Specifications |
|---|---|
| Oscilloscope |
|
| Signal Generator |
|
| Multimeter |
|
| General |
|
8. Maintenance and Care
8.1. Cleaning
Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure no liquids enter the device.
8.2. Battery Care
To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly, especially if it will be stored for an extended period. Store in a cool, dry place.
8.3. Fuse Replacement
If the current measurement function stops working, the fuse may need replacement. The device includes two spare fuses. Refer to the detailed PDF manual for instructions on how to safely open the device and replace the fuse. Always use fuses of the correct rating to prevent damage and ensure safety.
9. Troubleshooting
- Device does not power on: Ensure the battery is charged. Connect the USB-C cable and try powering on while charging. If it still doesn't power on, the battery might be faulty or the device requires service.
- Inaccurate readings in Multimeter mode: Check test lead connections. Ensure the correct measurement function is selected. Verify that the component being measured is de-energized (for resistance/capacitance).
- No waveform displayed in Oscilloscope mode: Check probe connection and ensure the probe's X1/X10 setting matches the device. Adjust the vertical scale and time base settings. Ensure the trigger level is set appropriately.
- Signal Generator not producing output: Verify that the signal generator mode is active and parameters (frequency, amplitude) are set correctly. Check the connection to the output port.
10. User Tips
- Always double-check your probe and test lead connections before taking any measurements to prevent damage to the device or the circuit under test.
- For oscilloscope measurements, start with a higher vertical scale and a slower time base, then adjust as needed to capture the waveform effectively.
- Utilize the auto-range feature in multimeter mode for quick measurements, but switch to manual range for more precise control when necessary.
- Regularly back up any saved waveform data if the device supports internal storage.
11. Warranty and Support
For detailed warranty information and specific support inquiries, please refer to the official user manual PDF or contact the seller directly. The comprehensive user manual (PDF) can be accessed here. If you require further assistance or have questions not covered in this manual, customers can privately chat with customer service for support.
