RION NL-42 Sound Level Meter, class 2

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Key Features

No paper manual is needed
Water-resistant (Except for the microphone)
Use of rechargeable batteries
Continuous detailed measurements for one month
Functionality can be extended by a range of options

specifications RION NL-42 Sound Level Meter

— Applicable standards

IEC 61672-1: 2013/2002 class 2

ANSI/ASA S1.4-2014/Part2 class 2

JIS C 1509-1: 2017 class 2

CE marking. WEEE Directives, Chinese RoHS (export model for China only)

— Measurement functions

Simultaneous measurement of the following items, with selected time weighting and frequency weighting

• Processing (main ch)

Instantaneous sound pressure level: Lp
Equivalent continuous sound pressure level: Leq
Sound exposure level: LE
Maximum sound pressure level: Lmax
Minimum sound pressure level: Lmin
Percentile sound levels: LN (0.1 to 99.9 %, 0.1-increment steps, max. 5 values)

• Processing (sub ch): Instantaneous sound pressure level: Lp

• Additional processing

In addition to main processing items, one of the following can be selected for simultaneous processing:
C-weighted equivalent continuous sound level: LCeq
C-weighted peak sound level: LCpeak

Z-weighted peak sound level: LZpeak
エ-time-weighted equivalent continuous sound level: LAエeq*2
Maximum エ-time-weighted equivalent continuous sound level: LAエmax*2
The power average of the maximum level of each 5 second interval: LAtm5
The frequency weighting for the additional processing synchronizes with the frequency weighting of the sub-channel, so when the sub-channel has A-weighting, LAtm5 can be selected.
When C-weighting (Z-weighting ) is selected, the additional processing LCeq and LCpeak (LZpeak) are selectable.

— Microphone

Type: UC-52

Sensitivity level: -33 dB

— Measurement range (RION NL-42)

A-weighting: 25 dB to 138 dB
C-weighting: 33 dB to 138 dB
Z-weighting: 38 dB to 138 dB
C-weighting peak sound level: 55 dB to 141 dB

Z-weighting peak sound level: 60 dB to 141 dB

— Inherent noise

A-weighting: 19 dB or less

C-weighting: 27 dB or less

Z-weighting: 32 dB or less

— Frequency range: 20 Hz to 8 kHz

— Frequency weighting: A, C, and Z

— Time weighting: F (Fast) and S (Slow)

— Level range: Single range (Linearity range: 113 dB)

Bar graph display range max: Max. 110 dB (20 to 130 dB)

Switching of bar graph display: Set the upper/ lower limit in 10 dB increments.

— RMS detection circuit: Digital processing method

— Sampling cycle: 20.8 μs (Lp, Leq, LE, Lmax, Lmin, Lpeak : sampling frequency: 48 kHz) 100 ms (LN )

— Calibration: Electrical calibration performed according to IEC and JIS standards, using internally generated signals: acoustic calibration performed with the NC-75.

— Correction functions

Windscreen correction: Compliant with IEC 61672-1 and JIS C 1509-1 standards when the windscreen is installed.

Diffuse sound field correction: Correction of frequency characteristics in order to comply with standards (ANSI S1.4) in diffuse sound field.

— Delay time

The meter can be set to start measuring a specified time (OFF, 1, 3, 5 or 10 s) after the start button has been pressed or when a user-set trigger is exceeded.

— Back erase function

When the PAUSE key is pressed to pause measurement, the preceding (user selectable) 0, 1, 3 or 5 s data are excluded from processing.

— Display (RION NL-42)

Backlit semitransparent color TFT LCD display WQVGA (400 x 240 dots) *LCD with touch panel (Capacitive Touch Panel)

Numerical display update frequency: 1 s Bar graph update frequency: 100 ms

— Store
• Manual: Data for measurement results are stored manually in single address increments.

Number of data: Internal memory: max. 1000 sets. SD Card: depends on the capacity of the SD Card*1

• Auto*2: Instantaneous values (Lp mode) and processed values (Leq mode) are stored continuously and automatically at preset intervals.

Lp sampling cycle: 100 ms, 200 ms, 1 s, Leq 1s

Leq sampling cycle: 10 s, 1, 5, 10, 15, 30 min, 1, 8, 24 h, and user selected time (up to 24 hours)

Measurement Time: Max. 1 000 h in Auto Lp storage mode, max. 100 000 addresses in Auto Leq storage mode(depends on the capacity of the SD card)*1

— Data recall: Allows viewing of stored data

— Setup memory: Up to five setup configurations can be saved in internal memory, for later recall Start up via file settings previously stored on SD card possible

— Waveform recording*2*3

File format: Uncompressed waveform WAVE file

Sampling frequency: Select 48 kHz, 24 kHz or 12 kHz

Data length: Select 24 bit or 16 bit

— Outputs
• DC output: Output DC signals using a frequency weighting characteristic selected by processing.

Output voltage: 2.5 V, 25 mV / dB at bar graph display full scale

• AC output: Output AC signals using a frequency weighting characteristic selected by processing or by A, C, Z-weighting.

Output voltage: 1 V (rms values) at bar graph display full scale

• Comparator output*2: Turns on when the open-collector output exceeds the set value (max. applied voltage 24 V, max. current 60 mA, allowable dissipation 300 mW).

— USB (RION NL-42)

Allows USB to be connected to a computer and recognized as a removable disk

Allows USB to be controlled via communication commands

— RS-232C communication: Allows for RS-232C communication via use of a dedicated cable

— Data continuous output*2
• Type of data

Instantaneous value: Lp

Processed value: Leq, Lmax, Lmin, Lpeak

• Output interval: 100 ms

— Power requirements: Four IEC R6 (size AA) batteries (alkaline or rechargeable batteries) or external power supply

Battery life (23 ̊C): Alkaline battery LR6 (AA): 26 h Ni-MH secondary battery: 25 h At the maximum *Depends on the setting

AC adapter: NC-98E

External power voltage: 5 to 7 V (rated voltage: 6 V)

Current consumption: Approximately 90 mA (normal operation, rated voltage)

— Ambient conditions

Temperature: -10 to +50 ̊C

Humidity: 10 to 90 % RH (non-condensing)

— Dustproof / water-resistant performance*4

IP code: IP54 (except for microphone) See precautions regarding waterproofing

— Dimensions, weight: Approx. 250 (H) x 76 (W) x 33 mm(D), approx. 400 g (with batteries)
— Supplied accessorie:
Storage case x 1, Windscreen WS-10 x 1, Windscreen fall prevention rubber x 1, Hand strap x 1, LR6 (AA) alkaline batteries x 4, SD card 512 MB×1 (NX-42EX preinstalled model only)

Introduction RION NL-42

The NL-42 was developed to eliminate the trouble of reading instruction manuals when conducting measurements. Provide full support for the measurement process.
Large and easily viewable three-inch LCD color display. The unit (except for the microphone) is water-resistant, which means that it is unaffected by sudden rain showers. You can use rechargeable batteries to help cut down on waste, making this an environmentally friendly product.

Features

– No paper manual is needed
– Water-resistant (Except for the microphone)
– Use of rechargeable batteries
– Continuous detailed measurements for one month
– Functionality can be extended by a range of options