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Rion NL-52 & NL-42 Sound Level Meter |
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Specifications |
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Model |
NL-52 |
NL-42 |
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Applicable standards |
IEC 61672-1: 2002 Class 1 |
IEC 61672-1: 2002 Class 2 |
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ANSI S1.4-1983 Type 1 |
ANSI S1.4-1983 Type 2 |
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ANSI |
ANSI |
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S1.4A-1985 |
S1.4A-1985 |
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Type 1 |
Type 2 |
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ANSI S1.43-1997 Type 1 |
ANSI S1.43-1997 Type 2 |
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JIS C 1509-1: 2005 Class 1 |
JIS C 1509-1: 2005 Class 2 |
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CE Marking ( EMC Directive 2004/108/EC, Low Voltage Directive 2006/95/EC ), WEEE Directives, Chinese RoHS ( export model for China only ) |
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Measurement functions |
Simultaneous measurement of the following items, with selected time |
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weighting and frequency weighting |
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Instantaneous sound pressure level : Lᴘ |
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Equivalent continuous sound pressure level : Leq |
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Sound exposure level : LE |
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Maximum sound pressure level : Lmax |
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Minimum sound pressure level : Lmin |
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Percentile sound levels : Lᴎ ( 0.1 to 99.9 %, 0.1-increment steps, max. 5 values ) |
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Processing (sub ch) |
Instantaneous sound pressure level : Lᴘ |
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Additional processing |
In addition to main processing items, one of the following can be selected for simultaneous processing : |
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C-weighted equivalent continuous sound level: LCeq |
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C-weighted peak sound level : LCpeak |
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Z-weighted peak sound level : LZpeak |
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ｴ-time-weighted equivalent continuous sound level : LAｴmax＊2 |
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The power average of the maximum level of each 5 second interval : LAtm5 |
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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. |
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When C-weighting ( Z-weighting ) is selected, the additional processing LCeq and LCpeak ( Lzpeak ) are selectable. |
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Measuring time |
10 s, 1, 5, 10, 15, 30 m, 1, 8, 24 h, and manual ( maximum 24 h ) |
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Microphone |
Type |
UC-59 |
UC-52 |
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Sensitivity level |
-27 dB |
-33 dB |
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Measurement range |
A-weighting : 25 dB to 138 dB |
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C-weighting : 33 dB to 138 dB |
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Z-weighting : 38 dB to 138 dB |
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C-weighting peak sound level : 55 dB to 141 dB |
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Z-weighting peak sound level : 60 dB to 141 dB |
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Inherent noise |
A-weighting |
17 dB or less |
19 dB or less |
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C-weighting |
25 dB or less |
27 dB or less |
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Z-weighting |
30 dB or less |
32 dB or less |
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Frequency range |
20 Hz to 20 kHz |
20 Hz to 8 kHz |
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Frequency weighting |
A, C, and Z |
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Time weighting |
F ( Fast ) and S ( Slow ) |
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Level range |
Single range ( Linearity range: 113 dB ) |
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Bar graph display range max |
Max. 110 dB ( 20 to 130 dB ) |
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Switching of bar graph display |
Set the upper/ lower limit in 10 dB increments. |
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RMS detection circuit |
Digital processing method |
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Sampling cycle |
20.8μs ( Lp, Leq, LE, Lmax, Lmin, Lpeak: sampling frequency : 48 kHz )100 ms ( LN ) |
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