The Norsonic 840 is the ideal tool for the experienced acoustician. 1/1, 1/3, 1/12, 1/24-octave + FFT
The dual channel, battery operated analyser has a bright, back-lit, 10" colour LCD screen. The operator accesses all set-ups using dedicated push-keys to open logical menus, so there is no need to navigate through multi-level menus
All selections may also be made by a numerical key sequence. A HELP description is available for any field in any menu |
- Features
- Dual channel measurements in true octave and third octave bands
- 0.1 Hz - 20 kHz frequency range in both channels in dual channel operation
- True A- and Lin spectral weighting networks in both channels
- Easy-to-use single-level menus and direct key control
- Large colour VGA display
- Microphone, line and charge inputs
- Powered from 12 VDC
- 80 dB dynamic range
- Internal memory for up to 32000 spectra
- Internal 3.5" MS-DOS compatible floppy disk drive
- IEEE-488, Centronics and RS-232C interfaces
- Multi-spectrum measurements (level vs. time)
- Internal signal generator
- Internal reverberation time calculations
- Sound intensity measurement capabilities - see GRAS 50AI Sound Intensity Probe
- True 1/12 and 1/24 octave filters
- 800 lines dual channel FFT
- Maximum Length Sequence (MLS) for measurements of level differences and reverberation time calculations
- Handy unit for field use
The internal PC is ideal for extensive post processing of data and running Windows applications. Numerical + graphical presentation on full colour screen.
Manufacturer's Specifications
Delivered with transient, sound intensity and building acoustics software built-in, but no other accessories, so you only pay for what you need
Please order microphone(s), preamplifier(s), power amplifiers, intensity probes and any extension cables etc., required to suit your applications.
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Our Nor 840 analysers may also be used to measure extremely low sound pressure levels, for more information and to download the Norsonic Application Note click here
To make intensity measurements add a GRAS 50AI probe
** For more information on the MLS - Maximum Length Sequence technique - both practical and theoretical click here
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| Nor 250 | Hemi-dodecahedron loudspeaker - 120 dB SWL |
| Nor 260 | Power amplifier with noise generator - 1 kW peak into 4 Ω load |
| Nor 330 | Battery Case for Nor 840, 5AH Ni-Cad [2 hours] battery + charger |
| Nor 1020 | Nor-Xfer PC software |
| Nor 1201 | Preamplifier - 1/2" with Lemo 1B connector - order extension cables as required |
| Nor 1220 | Measurement Microphone - 1/2" air condenser - free-field |
| Nor 1251 | Sound Calibrator- Class 1 |
| Nor 1264 | Tripod adaptor for low level measurements, twin microphone holder |
| Nor 1408 | Microphone preamplifier extension cable - 10 m long |
| Nor 1410 | Microphone preamplifier extension cable - 2 m long |
| GRAS 50AI | Sound Intensity Probe |
| GRAS 51AB | Sound Intensity Calibration Unit |
| * Our standard hire charges are based on a 7-day minimum period. Click here for details and other options. |
| BSI approved for the hire of noise & vibration instruments |
