Máy đo độ ồn Rion NL-42

■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}