Products Catalog

Specification

Manufacture : Japan
Dimension : 260 mm x 76 mm x 33 mm
Weight : 400 g
Short Description :
A new dimension in sound measurement sound level meter for wide range of applications

Description :
Sound Level Meter with Wide Range of Application model NL-20. Compliant with IEC standards and new IEC/ CDV 61672-1 standard and also IEC 60651; 1979 type 2, IEC 60804: 1985 type 2. Measurement functions; sound level Lp, Equivalent continuous sound level Leq, sound exposure level LE, max. sound level Lmax, min. sound level Lmin, Percentile sound level LN ( 5 selectable settings) . Measurement time : 10 seconds up to max 200 hours.

Measurement range :
A weighting 28 to 138 dB,
C weighting 33 to 138 dB,
Flat 38 to 138 dB.

Inherent noise :
A weighting 20 dB,
C weighting 27 dB,
Flat 32 dB,
Linearity range 100 dB,
Reference sound pressure level 94 dB,
Reference level range 30 to 120 dB

Level range selection :
20 to 130 dB in 6 ranges.

Freq. range including microphone :
20 to 8000 Hz

Electronic circuit characteristic 10 to 20000 Hz, freq. weighting A, C, & Flat. RMS detection digital processor time weighting, fast & slow. Internal calibration with 1KHz sine wave for electrical, acoustic calibration using sound calibrator. Microphone model UC-52 ½ inch electret condenser type, preamplifier model NH-21. Display backlit LCD ( 128 x 64 dots + 121 icons) . Numeric and bar graph indication of sound level Processing result screen, level time graph