Nor277
tapping machine
The Norsonic 277 Tapping Machine is an impact sound generator, for making footfall noise transmission measurements in buildings as set out in International and National Standards.
Tapping Machine for building acoustics and sound insulation testing
The tapping machine Nor277 is the third generation of tapping machines from Norsonic for performing standardised impact noise tests (foot fall noise). It incorporates all the experience from the former generations into a compact, light, yet a rugged unit with the construction based on an extruded aluminium chassis.
The hammers are made of harden stainless steel, ensuring non deformation of the hammer shape even after years in use. The unit weight is only 10 kg including the optional battery. Retractable feet ensure easy transportation and storage
Features:
- PTB type approval
- Impact sound transmission testing according to ISO 140 part VI, VII and VIII, ASTM E-492 and ASTM E-1007
- Determination of single number quantity index Ln,w, in accordance with ISO 717-2 and ASTM E-989
- Remote operation from hand switch or PC
- Mains or battery operation
- Powered from 85-264 volt AC main supply. Built in Lithium Ion rechargeable batteries.
- Battery capacity: Typical 1 hour with intermittent use and 45 minutes of continues operation.
- Battery de-rating: <5% loss in capacity per 100 discharge/charge cycles.
- Charging time: 2 hours
- Compact
- Low weight 10 kg (22 lb) incl. battery and wireless remote option
- Rugged construction
- Five hammers each having a mass of 500 g falling from a height of 40 mm (adjustable)
- Tapping sequence of 10 impacts per second, rpm controlled via servo feedback loop
- Built in self check of hammer fall speed, and tapping sequence.
- Retractable feet
- Dimensions feet retracted: 165 x 230 x 495 mm
- Dimensions feet extended: 265 x 230 x 495 mm
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