Introduction
The document introduces the Nor1517A Airflow Resistance Measurement System, which is crucial for assessing the airflow resistance in porous materials. This system is essential for quality control in production and research and development testing. It measures airflow resistance according to ISO9053/DIN EN 29053 standards.

Applications
The system is used for quality control in production processes and testing in research and development. It accommodates various sizes of test materials using a height-adjustable clamping device and adapters.

Features
- Fast and accurate measurement and readout
- Accepts test materials of various forms and sizes
- Easy setup and use
- Large dynamic range of measurement
- Operates at a frequency of 2 Hz

Measurement Principle
The system uses a dynamic principle with an AC motor-driven piston to create an oscillating movement, producing an alternating airflow at 2 Hz. The pressure modulation is measured by a condenser microphone connected to a sound analyzer, with results displayed directly in Pa·s/m.

Specifications
- Function: Measures specific airflow resistance in Pa·s/m according to ISO 9053
- Measurement range: 10 Pa·s/m to 30,000 Pa·s/m, extendable to 200,000 Pa·s/m with corrections
- Airflow speed: 0.5 mm/s and 5 mm/s
- Test area diameter: 100 mm
- Dimensions: 590 mm × 290 mm × 640 mm
- Power supply: 230 V/50 Hz (110 V/60 Hz optional)
- Weight: 19 kg

Accessories Included
- Calibration disc
- Sample holder 1517A/03
- Sound level meter Nor140 with microphone, sealing device, and 1/3 octave filters

Additional Accessories
Norsonic provides mounting devices for test materials upon request.

Direct Readout Examples
- 269 = 269 Pa·s/m
- 90.7k = 90,700 Pa·s/m