OWON HDS25/HDS25S Handheld Multi-Function Digital Oscilloscope Instruction Manual

1. Introduction

The OWON HDS25/HDS25S is an advanced handheld multi-function instrument designed for a wide range of electrical testing and measurement applications. It integrates a digital oscilloscope, a true RMS multimeter, and a waveform generator (HDS25S only) into a compact, portable device. This manual provides detailed instructions for the safe and efficient operation, maintenance, and troubleshooting of your OWON HDS25/HDS25S.

2. Product Overview

2.1 Key Features

• All-in-One Functionality: Integrates Oscilloscope, Multimeter, and Waveform Generator (HDS25S only).
• Oscilloscope: 25MHz bandwidth, 2-channel input, 250MSa/s sampling rate (single channel), 125MSa/s (dual channel), 8K memory depth, 10,000 wfrms/s waveform refresh rate.
• Multimeter: 4.5-digit, 20,000 counts, True RMS, supporting standard voltage, current, resistance, capacitance, diode, and continuity tests.
• Waveform Generator (HDS25S only): 10 MHz output frequency, 125MSa/s sampling rate, 14-bit vertical resolution, 8K waveform length, Max 5Vpp output amplitude.
• Display: 3.5-inch LCD display.
• Connectivity: Standard USB Type-C interface for power bank charging and PC communication.
• Portability: Small, light, compact, and easy to operate handheld design.

2.2 Components and Accessories

The package includes the following items:

• Main device (OWON HDS25 or HDS25S)
• Probe
• Multimeter Leads
• USB Cable
• BNC to Alligator Clip
• Quick Guide

3. Setup

3.1 Charging the Device

The OWON HDS25/HDS25S is powered by an 18650 lithium battery and features a USB Type-C charging interface. To charge the device:

1. Connect the provided USB Type-C cable to the device's charging port.
2. Connect the other end of the USB cable to a compatible USB power adapter or a power bank.
3. The device can operate for approximately 3-6 hours on a full charge.

3.2 Initial Power On and Connections

1. Press and hold the power button to turn on the device.
2. For oscilloscope measurements, connect the oscilloscope probe to the BNC input connector.
3. For multimeter measurements, connect the multimeter leads to the dedicated input connectors (mA, COM, VΩHzC).
4. For waveform generation (HDS25S only), connect the BNC to alligator clip cable to the waveform generator output.

4. Operating Instructions

4.1 Mode Selection

The OWON HDS25/HDS25S allows for quick switching between its primary functions: Oscilloscope, Multimeter, and Waveform Generator. Use the "Mode" button on the front panel to cycle through these modes.

4.2 Oscilloscope Operation

The oscilloscope function provides detailed waveform analysis. Key features include:

• Acquisition Modes: Supports Peak Detect for capturing glitches and reducing confusion.
• High Refresh Rate & Deep Storage: Max 10,000 wfrms/s refresh rate and 8K record length for capturing exceptional and low probability events.
• Auto Measurements: Perform up to 6 automatic measurements simultaneously, including Frequency, Period, Amplitude, Max, Min, Mean, RMS, and PK-PK.
• Cursor Measurement: Use cursors to measure voltage difference (ΔV) and time difference (ΔT) between points on the waveform.
• Save Function: Save up to 4 settings, 4 waveform images, and 4 CSV waveform files. Reference waveforms can be displayed for comparison.
• PC Communication: Connect the device to a computer via USB Type-C to save waveform pictures and data for further analysis.

4.3 Multimeter Operation

The 4.5-digit multimeter offers precise measurements:

• Measurement Functions: Voltage (AC/DC up to 750V/1000V), Current (AC/DC up to 10A), Resistance, Capacitance, Diode, and Continuity tests.
• Auto Range: Automatically selects the appropriate measurement range for convenience.
• Reading Hold: Freeze the current reading on the display.
• Relative Measurement: Measure the difference between a current reading and a stored reference value.

4.4 Waveform Generator Operation (HDS25S Only)

The HDS25S model includes a waveform generator for signal injection and testing:

• Output Waveforms: Generate standard waveforms such as Sine, Square, Ramp, and Pulse.
• Special Waveforms: Supports 8 built-in special waveforms including Sinc, Bessel, BesselJ, StairUp, StairUpDown, StairDown, AttAIT, and AmpAIT.
• Frequency Control: Output frequency up to 10MHz with 0.1Hz frequency resolution.
• Amplitude Control: Max 5Vpp output amplitude.

5. Maintenance

5.1 Battery Management

The device uses 18650 lithium batteries. For optimal battery life:

• Charge the device fully before first use.
• Avoid completely draining the battery frequently.
• If storing the device for an extended period, charge it to about 50% and store in a cool, dry place.

5.2 Cleaning and Storage

• Clean the device exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Ensure all ports are free of dust and debris.
• Store the device in a clean, dry environment, away from extreme temperatures and direct sunlight.

6. Troubleshooting

This section provides solutions to common issues you might encounter. If the problem persists, please contact customer support.

7. Specifications

The following table details the technical specifications for the OWON HDS25 and HDS25S models:

Specifications are subject to change without prior notice. Please refer to the official website for the latest updates.

8. User Tips

• For stable readings, ensure proper grounding when performing sensitive measurements.
• Utilize the hangable bracket to save working space and position the device for optimal viewing.
• Regularly back up important waveform data to your PC using the USB Type-C connection.

9. Warranty and Support

The OWON HDS25/HDS25S comes with a one-year warranty from the date of purchase. For technical support, warranty claims, or any questions regarding the product, please refer to the contact information provided in your Quick Guide or visit the official OWON website.

When contacting support, please have your model number (HDS25 or HDS25S) and purchase details ready.