Norsonic 140 Sound Level Meter - Options
All Nor 140 analysers supplied by Gracey & Associates include options 1, 3, 4 and 6
| Option 01 : 1/1-octave band filters - real time |
- Parallel 1/1-octave band, real time filters, 0.5 Hz - 16 kHz
- All filters fulfil the IEC 61260 class 1 digital IIR base 10 requirements
- 120 dB 'one-range' in all filter bands
- Graphical and numeric display
- A-weighting feature available on displayed results
- A limited frequency range 8 Hz - 16 kHz can be set in order to avoid low frequency noise and a 3 Hz third order high pass filter is then enabled in the analogue input stage to prevent overload due to low frequency noise.
- The wide frequency range with full dynamic range of more than 120 dB makes the instrument well suited for both vibration and noise measurements
| Option 03 : 1/3-octave band filters - real time |
- Parallel 1/3-octave band, real time filters, 0.4 Hz - 20 kHz in one span
- All filters fulfills the IEC 61260 class 1 digital IIR base 10 requirements
- 120 dB 'one-range' in all filter bands
- Graphical and numeric display
- A-weighting [pre-weighting] feature available on displayed results
- A limited frequency range 6.3 Hz - 20 kHz can be set in order to avoid low frequency noise and a 3 Hz third order high pass filter is then enabled in the analogue input stage to prevent overload due to low frequency noise.
- The wide frequency range with full dynamic range of more than 120 dB makes the instrument well suited for both vibration and noise measurements
| Option 04 : Calculation of Ln statistical values |
- Calculates 7 fixed Ln values L1%, L5%, L10%, L50%, L90%, L95% and L99%
- Parallel calculation of 1 editable Ln, selectable within the range 0.1% - 99.9%
- Statistical calculations based on 0.2 dB class widths covering the entire 120 dB dynamic range
- Parallel statistical calculations on both A and C/Z-weighted networks
- Statistical values calculated for the individual filter bands as well - if the filter option(s) are installed
- The statistical distribution calculations employs the F time constant and applies to the spectral weighting networks (A and C or Z) as well as all the individual 1/1- and 1/3-octave filter bands (if applicable).
- The back-erase feature, which deletes the ten most recent seconds of acquired global data prior to a pause upon resuming, updates the statistics buffers as well to maintain consistency.
| Option 06 : Level versus Time measurements |
- Measures the time 'Profile' (level vs. time) of the noise signal with preset time resolution simultaneously with the overall 'Global' measurement
- Selection of preset intervals within the 1 second to 99 hours interval range
- Automatic level versus time storage of LAeq, LAmax, and LCpeak or LZpeak
- Automatic multi-spectrum storage of Leq and Lmax if option 1 is installed
- Level versus time measurement continues during a paused Global measurement
- Markers identify any pause, stop or continuation of a measurement
- Real-time graphical and numeric display of the level versus time results
- A pause marker is inserted into the time profile in pause mode
- An overload marker is inserted if overload occurs
* Our standard hire charges are based on a 4-day minimum period, details other options.
Gracey & Associates 01933 624212 hire@gracey.com
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