Rion NL-52 & NL-42 Sound Level Meter

Specifications

Model

NL-52

NL-42

Applicable standards

IEC 61672-1: 2002 Class 1

IEC 61672-1: 2002 Class 2

ANSI S1.4-1983 Type 1

ANSI S1.4-1983 Type 2

ANSI

ANSI

S1.4A-1985

S1.4A-1985

Type 1

Type 2

ANSI S1.43-1997 Type 1

ANSI S1.43-1997 Type 2

JIS C 1509-1: 2005 Class 1

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

Instantaneous sound pressure level : Lᴘ

Equivalent continuous sound pressure level : Leq

Sound exposure level : LE

Maximum sound pressure level : Lmax

Minimum sound pressure level : Lmin

Percentile sound levels : Lᴎ ( 0.1 to 99.9 %, 0.1-increment steps, max. 5 values )

Processing (sub ch)

Instantaneous sound pressure level : Lᴘ

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.

Measuring time

10 s, 1, 5, 10, 15, 30 m, 1, 8, 24 h, and manual ( maximum 24 h )

Microphone

Type

UC-59

UC-52

Sensitivity level

-27 dB

-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

17 dB or less

19 dB or less

C-weighting

25 dB or less

27 dB or less

Z-weighting

30 dB or less

32 dB or less

Frequency range

20 Hz to 20 kHz

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

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