DIFFERENTIAL NOISE CANCELLING
WHAT IS THE DIFFERENTIAL NOISE CANCELLING?
When performing leak testing on large, flexible components—such as automotive assemblies, medical devices, or plastic parts—within noisy industrial environments, achieving precise and consistent measurements can be a significant challenge. Background vibrations, pneumatic noise, and environmental fluctuations often interfere with traditional leak detection methods, leading to unreliable results and longer cycle times.
To address this, ATEQ’s Differential Noise Cancelling (DNC) technology filters out ambient disturbances from the test signal. By isolating the true pressure variation caused by a leak, DNC ensures high-accuracy leak detection, even in harsh production settings. This feature not only improves test reliability but also reduces false rejects and increases throughput, making it ideal for high-volume manufacturing lines.
HOW TO OPTIMIZE LEAK TESTING CYCLE TIME?
By using ATEQ’s F670 Large Volume Differential Pressure Decay Leak Tester equipped with DNC, manufacturers can now detect minute pressure drops—as low as 0.1 Pa/sec—even in fluctuating environments.
- Stabilizes readings by subtracting background influence
- Optimizes cycle time by avoiding retests
- Reduces scrap and improves quality assurance
WHY USE THE ATEQ DNC FEATURE?
- Pressure Fluctuations
due to time of day or building ventilation
- Temperatures Variations
(HVAC Systems, weather)
- Airflow Changes
(fans, opening doors/windows)
- Vibrations
(from machinery, forklifts, music)
APPLICATION EXAMPLE: EV BATTERY
Large and flexible components, such as EV battery housings, are particularly prone to distortion from environmental disturbances. ATEQ’s DNC technology ensures reliable leak detection despite these challenges—making it ideal for modern EV manufacturing.
| Compare Readings: With vs. Without DNC |
|---|
| With DNC | Without DNC | |
|---|---|---|
| Leak Readings | Fluctuating, Inaccurate | Stable, Reliable |
| Test Results | Risk of false positives | Accurate pass/fail decisions |
| Efficiency | Slower Cycle Times | Faster, optimized testing |
TYPICAL PART APPLICATIONS USING DNC (Differential Noise Cancelling)
- Automotive
- EV battery covers & enclosures
- Fuel tanks
- Air intake ducts & hoses
- HVAC housings
- Reservoir tanks for cooling or windshield washer systems
- Cooling plate assemblies (prone to warping or vibration)
- Flexible electrical conduit systems
- Inverter housings
- Medical Devices
- IV fluid bags
- Catheter systems with long tubing
- Sterile flexible packaging
- Soft polymer containers for biofluids
Aerospace
- Oxygen tanks made of composite materials
- Flexible ducting for air or fluids
- Pneumatic systems in lightweight enclosures
- HVAC/Appliances
- Refrigeration system tubing in plastic shells
- Flexible water reservoirs or tanks
- Washer/dryer hose assemblies
