TAPPING
MACHINE N211
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The tapping machine N211 is a lightweight portable impact sound source designed to fulfill the specifications of the standards dealing with impact sound transmission measurements (ISO 140, ASTM E 492, DIN 52210, BS 5821 and ISO 717).
With a PC-based measurement system such as Symphonie or Jazz, and the building acoustics software dBBATI, the weighted impact sound pressure level Ln, WT may be easily calculated.
Made of 5 steel hammers in line, weighting 500 grams each, the tapping machine N211 provides a free fall of the hammers equal to 40 mm, as required by the standards. User-interchangeable rubber tipped hammers for special floors are available as an option.
Installing the tapping machine N211 on-site is very simple. Battery operation ensures a complete freedom of use. The HF remote control allows the user to operate the tapping machine at a distance during a measurement session in order to limit the duration of the impacts.
The tapping machine N211 is delivered with a wireless remote control as well as an operation manual. The battery charger is also included.
Key points
 | standardised |
| remote control |
| robust |
| battery operated |
| Power : 220 Volts AC - Working 12 Volts DC |
| Electronic control of impact rate |
| Battery life : about 1 hour |
| Radio control for remote operation |
| Weight : about 15 kg |
| Dimensions : 810 mm x 330 mm x 320 mm |
| 5 steel hammers in line |
| Free fall equal to 40 mm (adjustable) |
| Tapping frequency : 10 impacts per second |
| Time between impact and lift of the hammer less than 80 ms |
| User-interchangeable rubber tipped hammers |
