■Applicable standards IEC 61672-1: 2002 Class 2
ANSI S1.4-1983 Type 2
ANSI S1.43-1997 Type 2
JIS C 1509-1: 2005 Class 2
CE Marking (EMC Directive 2004/108/EC, Low Voltage Directive 2006/95/EC), WEEE Directives, Chinese RoHS (export model for China only)
■Measurement functions Simultaneous measurement of the following items, with selected time
weighting and frequency weighting
1.Processing
(main ch) 1) Instantaneous sound pressure level: Lp
2) Equivalent continuous sound pressure level: Leq
3) Sound exposure level: LE
4) Maximum sound pressure level: Lmax
5) Minimum sound pressure level: Lmin
6) Percentile sound levels: LN (1 to 99 %, 1 % Step: Minimum 5 values,calculated from Lp or Leq 1s)
2.Processing
(sub ch) 1) Instantaneous sound pressure level: Lp
3.Additional
processing In addition to main processing items, one of the following can be selected for simultaneous processing:
1) C-weighted equivalent continuous sound level: LCeq
2) C-weighted peak sound level: LCpeak
3) Z-weighted peak sound level: LZpeak
4) 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.
4.Simultaneous
processing Parallel measurement and logging of the followiing parameters:
Logging with an interval of 100 ms: LXY
Logging with an interval of 1 s to 24 h (selectable in steps of 1 s):
LXeq and LAIeq, LXE, LXYmax and LAImax, LXYmin, LAN, LCpeak and LZpeak, LAtm5
X = Frequency weighting for A, C and Z
Y = Time weighting for F, S and I
N: Four exceedance values selectable 1 to 99 % in steps of 1 % and one
value selectable 0.1 to 99.9 % in steps of 0.1 %
(Available when the unit set on A-weighting and FAST)
■Measuring time 10 s, 1, 5, 10, 15, 30 m, 1, 8, 24 h, and manual (maximum 24 h)
■Microphone
1.Type UC-52
2.Sensitivity level -33 dB
■Measurement range 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 (dynamic range: 113 dB)
1.Bar graph display range max Max. 110 dB (20 to 130 dB)
2.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 Measurement Law: electrical calibration performed according to IEC and JIS standards, using internally generated signals: acoustic calibration performed with the NC-74.
■Correction functions
1.Windscreen correction Compliant with IEC 61672-1 and JIS C 1509-1 standards when the windscreen is installed
2.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 Backlit semitransparent color TFT LCD display WQVGA (400 x 240 dots)
*LCD with touch panel (Capacitive Touch Panel)
1.Numerical display update frequency 1 s
2.Bar graph update frequency 100 ms
■Store
1.Manual Data for measurement results are stored manually in single address increments.
•Number of data Internal memory: max. 1 000 sets
SD Card: depends on the capacity of the SD Card*1
2.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, 1s, Leq 1s
•Leq sampling cycle 10 s, 1, 5, 10, 15, 30 ms, 1, 8, 24 h
•Measurement Time Max.1 000 h (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*3
1.File format Uncompressed waveform WAVE file
2.Sampling frequency Select 48 kHz, 24 kHz or 12 kHz
3.Data length Select 24 bit or 16 bit
■Outputs
1.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
2.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
3.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 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
1.Type of data
•Instantaneous value Lp
•Processed value Leq, Lmax, Lmin, Lpeak
2.Output interval 100 ms, 1 s
■Print out Printing of measurement results on dedicated printer DPU-414
■Power requirements Four IEC R6 (size AA) batteries (alkaline or rechargeable batteries) or external power supply
1.Battery life (23 ℃) Alkaline battery LR6 (AA): 26 h Ni-MH secondary battery: 25 h At the maximum
2.AC adapter NC-98C
3.External power voltage 5 to 7 V (rated voltage: 6 V)
4.Current consumption Approximately 90 mA (normal operation, rated voltage)
■Ambient conditions
1.Temperature -10 to +50 ℃
2.Humidity 10 to 90 % RH (non-condensing)
■Dustproof / water-resistant performance IP code: IP54 (except for microphone)
■Supplied accessories 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
*1 Use Rion fully guaranteed products
*2 NX-42EX required (sold separately)
*3 NX-42WR required (sold separately)
*4 Protection against harmful dust and water splashing from any direction
* Windows is a trademark of Microsoft Corporation
* Specifications subject to change without notice
