Program Cards for the Rion NL-Series Sound Level Meters

The NL-series has proven to be very popular and capable of meeting the majority of end user requirements in a variety of industries.

To compliment the NL-series Rion have provided an attractive lineup of optional program cards, these CompactFlash (CF) cards contain programs for adding useful functions such as sound monitoring, 1/1 and 1/3 octave real-time analysis and FFT analysis.

(Please refer to the Progam card compatability guide below)

Adds 1/1, 1/3 Octave real-time analyser function to NL-22/32

In real-time mode all 1/1 octave or 1/3 octave bands are measured simultaneously and are displayed on the instruments LCD as a graph or in table format. Suitable for measurement noise sources with a constant or fluctuating frequency content or short events like the pass by of vehicles, trains, etc.

Applications: Investigation of frequency content of the noise, detection of the tonal components, identification of sound sources.

• Measurement modes: Lp, Leq, LE, Lmax (select one processing function)
• Frequency analyser bands:
• 1/1 octave filter: 16 Hz to 8 kHz
• 1/3 octave filter: 12.5 Hz to 16 kHz
• Memory: Max 100 data per file, Number of files: max. 100
• AC/DC output: Voltage always corresponds to Lp value
• The dB(A) and dB(Flat) levels are measured and displayed simultaneously with the 1/1 or 1/3 octave band levels

Adds sound recording to the NL-22/32

Events are recorded as compressed audio files, which can be converted using the RION NL-22PB1 management software into a PC compatible WAV file. Data logging in the Auto 1 or Auto 2 mode can be carried out simultaneously with the sound recording function, This makes the NX-22J ideal for unattended measurements in response to complaints arising from intermittent sources of noise.

The measurement results can be related to specific events which are identified by listening to the WAV files.

Audio recording can be triggered by the sound pressure level exceeding a user-defined trigger level (Event Mode). Simultaneously the instrument can be set to record 15 seconds of audio every 15 minutes, 30 minutes or 1 hour (Interval Mode)

Adds FFT analyer function to NL-22/32

The FFT line spectrum is displayed on the instrument LCD display as a graph. FFT narrow-band analysis is useful for evaluation of tonal components and identification of noise sources. The dB(A) and dB(Flat) levels are measured and displayed together with the FFT spectrum.

• Frequency span: 2 kHz, 5 kHz, 10 kHz, 20 kHz
• Window types: Regular, Hanning
• Number of analysis lines: 400
• Zoom ratio: x1, x2, x4
• Processing: Instantaneous, linear average, maximum value
• Memory: Max 100 data per file, Number of files: max. 50

Adds high-pass and low-pass filter function

The universal band pass filter is formed by application of a high pass filter and a low pass filter with cut-off frequencies selectable from the standard ISO third octave band frequencies. The band filter can be used to isolate a sound under investigation from noise from extraneous sources, careful selection of the pass band can result in a better signal-to-noise ratio.

Applications: Reduction of the influence of wind noise or evaluation of noise from specific sources which are giving rise to complaints, can also be used in a production environment as part of a quality control system in combination with the sound level meter's comparator function.

• 3rd order high-pass filter: 10 Hz to 12.5 kHz (NL-21 to 8 kHz)
• 3rd order low-pass filter: 10 Hz to 12.5 kHz (NL-21 to 8 kHz)
• AC/DC output: For selected frequency band

Adds frequency band switching analyser function

Serial 1/1, 1/3 octave band filter program card suitable for measurement of noise sources with a steady sound level or spectrum

Applications: Investigation of frequency content, investigation of the presence of pure tones, identification of sound sources, etc

• Frequency analyser bands:
• 1/1 octave filter: 16 Hz to 8 kHz
• 1/3 octave filter: 12.5 Hz to 16 kHz (NL-21 to 10 kHz)
• AC/DC output: For selected frequency band

Rion program card compatibility guide