Origins

To ensure reliable product quality, AED/defibrillator manufacturers perform numerous tests at every stage before the product hits the market. Traditionally, this testing requires multiple pieces of equipment: a defibrillation analyzer, an external load box, a current clamp probe to capture the shock’s current, and a pre-amplifier to amplify the captured current and send the signals to an oscilloscope for waveform display.
This complex testing setup leads to cumbersome operations, requiring operators to carefully observe and record test data while being familiar with each piece of equipment to avoid human error. Additionally, to ensure the accuracy and reliability of test data, regular calibration and maintenance of multiple testing devices incur considerable costs.

Understanding these pain points, we developed the DFS400, which integrates the functions of a defibrillation analyzer, an external load box, and an oscilloscope into a single tester. With its intuitive software interface, users can effortlessly complete setups and tests with just a few clicks. After each test, the software automatically saves the results, creating a traceable test history and eliminating the inconvenience of manual recording.

Considering that engineers need to simulate different physiological conditions by using various impedance values in addition to the standard 50Ω verification for general AED/defibrillator performance, we designed the DFS400 to allow users to switch between its multiple built-in impedance loads through the software. This feature helps engineers determine if the AED/defibrillator can deliver appropriate shock energy under various scenarios.

We've also learned from our customers that verifying the consistency and reliability of each shock requires a substantial number of shock tests, which is time-consuming. Therefore, we equipped the DFS400 with R&R analysis functionality (Repeatability and Reproducibility Analysis) to compare and analyze up to thousands of records of shock waveforms. This ensures that the shock waveforms, energy, and number of shocks meet the manufacturer's quality standards.

To assist engineers in conducting numerous tests efficiently, we provide a free software development kit (SDK), allowing users to develop their own automated testing software. This reduces the effort of repetitive setups for operators and minimizes human error, accelerating the testing process. We envision the DFS400, with its all-in-one functionality, becoming the best aid for AED/defibrillator engineers in testing and verification.

Functions

ECG Signal Output

Outputs both shockable and non-shockable ECG signals for testing AED/defibrillator's interpretation capability, including Ventricular Fibrillation (Coarse), Ventricular Fibrillation (Fine), Ventricular Tachycardia, Ventricular Tachycardia (Fast), Atrial Fibrillation, Asystole, and NSR.

Shock Waveform and Energy Measurement

After the DFS400 receives a shock, its software displays the shock waveform, energy (in Joules), parameters, and characteristic points captured at a sampling rate of 4μs, and enables users to move voltage and time cursors to view detailed test data.

Basic Waveform Output

Provides Sine, Square, and Triangle waveforms with adjustable BPM, frequency, and amplitude values to test the basic performance of AED/defibrillator.

Switchable Loads

Built-in impedance values of 25Ω, 50Ω, 75Ω, 100Ω, 125Ω, 150Ω, 175Ω, and 200Ω can be switched via software to simulate different physiological conditions for testing the effectiveness of AED/defibrillator shocks.

Raw Data Playback

Supports playback of ECG databases, and reproduces clinically recorded or user-defined waveforms for repeated verification to facilitate the development process.

Simple Automated Testing

Uses the "Auto Sequence" function to organize and store frequently used test items for automated testing.

Shock Waveform and Energy Analysis

The ''Repeatability and Reproducibility Analysis'' function compares multiple shock waveforms and automatically calculates their energy mean value and standard deviation, enabling quick confirmation of product quality through visualized test data.

Highlights

 One Single Device Integrates Multiple Functions with Intuitive Software Operations

• Highly integrates functions of multiple pieces of testing equipment — eliminates the need for setting up multiple devices and reduces the potential noise interference that could originally occur between devices
• Quickly sets test parameters via dedicated software, including shock energy pass criteria of adult and child modes for each impedance value, providing higher test accuracy

Raw Data Playback — Performance Verification Using Real ECG Signals

• Supports playback of ECG databases or clinically recorded waveforms to test the AED/defibrillator's interpretation capability
• Plays user-defined signals to verify specially designed specifications

 

 Provided SDK for Flexibly Developing Programs as Needed

• Users can develop automated testing software based on their needs to control the testing process, reducing the effort of repetitive setups for numerous tests

 

 Automated Shock Test Data Storage and Quality Confirmation through Repeatability and Reproducibility Analysis

• Automatically saves complete raw data of shock waveforms, creating a test history that can be accessed and traced anytime
• Repeatability and Reproducibility Analysis — compares the shock waveforms of multiple DUTs or a single DUT to confirm the consistency of quality and reliability, facilitating conducting the endurance test described in IEC 60601-2-4
   
  Note: The Repeatability and Reproducibility Analysis needs a separate purchase.