Description
Rion NL-27 Sound Level Meter Class 2 | NL-27 | Compact Sound Level Meter, Class 2
The Rion NL-27 Sound Level Meter is a device used to measure sound pressure levels or ambient noise. It boasts a high level of accuracy and is classified as Class 2 according to international standards. This makes it suitable for applications requiring accurate noise measurements, such as in industry, workplaces, construction, entertainment, and more.
The Rion NL-27 Sound Level Meter is a reliable and accurate tool for measuring ambient noise levels. With advanced features and reliable measurement capabilities, this tool is highly useful for controlling and monitoring noise in various industrial and other environmental applications.
Features Rion NL-27 Sound Level Meter Class 2 :
- Wide linearity range; from 30 to 130 dB without range switching.
- Quick start up and easy operation to measure Lp, Leq, Lmax, LE and LCpeak.
- Frequency range: from 20 Hz to 8 kHz
- Frequency weighting: A and C
Specification Rion NL-27 Sound Level Meter Class 2 :
| Standard compliance | General-Purpose Sound Level Meter according to Japan Measurement Law JIS C 1509-1: 2017 class 2, IEC 61672-1: 2013 class 2 CE mark, WEEE Directive |
| Measurement functions Processing functions (normal mode) | Sound level Lp, equivalent continuous sound level Leq, sound exposure level LE, maximum sound level Lmax, peak sound level LCpeak (only when peak range was selected) |
| Measurement time settings | 1 min, 5 min, 10 min, 1 h |
| Microphone | 1/2 inch electret condenser microphone Model: UC-52, sensitivity level: -33 dB ± 3 dB (re.1 V/Pa) |
| Measurement level range (normal mode) | A-weighting: 30 dB to 137 dB, C-weighting: 36 dB to 137 dB |
| Linear operation range (A-weighting, 1 kHz) | 30 dB to 137 dB |
| Peak sound level measurement range | 65 dB to 140 dB |
| Residual noise level | A-weighting: max. 24 dB, C-weighting: max. 30 dB |
| Measurement frequency range | 20 Hz to 8 kHz |
| Reference frequency, reference sound pressure level | Reference frequency: 1 kHz, reference sound level: 94.0 dB |
| Frequency weighting characteristics | A-weighting, C-weighting |
| Time weighting characteristics | F (Fast), S (Slow) |
| Level range | Wide range: 30 dB to 130 dB, peak range＊: 65 dB to 130 dB ＊Peak range is used for peak sound level measurements |
| RMS detection method | Digital processing |
| Processing | Digital sampling cycle: 30.3 μs (Lp, Leq, LE, Lmax, Lpeak) |
| Calibration | Calibration frequency: 1 kHz, Calibration sound level: 94 dB Japan Measurement Law: electrical calibration with internal signal source; JIS, IEC: acoustic calibration using NC-74 |
| Windscreen | Unit is compliant with JIS C 1509-1 class 2 and IEC 61672-1 class 2 with and without windscreen |
| Display (TN positive display, reflective) | Numeric display: 0.1 dB resolution Bar graph: Scale range 100 dB, 5 dB resolution (update frequency 0.1 s) Warning indicators: Over (Overload) appears at 137.4 dB (1 kHz) Under (Underload) appears from -0.6 dB of lower scale limit Battery capacity 3-stage indicator for remaining capacity |
| Store function (processing results saved in internal memory, using manual store) | Number of data: 199 Stored data can be checked on recall screen |
| DC output connector | DC output: 3 V (full scale), 25 mV/dB, output impedance: 50 Ω Load impedance: 10 kΩ or more |
| AC monitor output connector | AC output: 1 Vrms +600 -400 mVrms (at 110 dB), overload: +2 dB Output impedance: 600 Ω, load impedance: 10 kΩ or more, frequency weighting: Z-weighting |
| USB connector | For transfer of stored data to a computer, using optional USB adapter cable |
| Power requirements (size AAA [IEC R03] battery x 2 Normal temperature) | Current consumption: approx. 80 mA (3 V operation) Battery life: approx. 9 hours (with alkaline batteries), （Wide range）approx. 3 hours (with manganese batteries) |
| Temperature / humidity range for operation | -10 ℃ to +50 ℃, 10 % to 90 % RH (no condensation) |
| Dimensions, weight | Approx. 120 mm (H) × 63 (W) × 23.5 mm (D), approx. 105 g (including batteries) |
| Supplied accessories | Windscreen × 1, Windscreen fall prevention rubber× 1, Silicone cover × 1, strap × 1, AAA [IEC R03] alkaline battery × 2 |
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