General Noise Meter NL-22

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last updated：Jul 09, 2018

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Simple operation supports a wide range of noise measurements.

The ordinary sound level meter NL-22 has a built-in serial interface. By using this interface, you can set the measurement conditions and control the measurements of the NL-22 via commands from a computer, as well as transfer current data and data stored in the built-in memory to the computer. 【Compact Flash Card Compatible】 Direct recording to a large-capacity memory card is possible. A standard 16MB card is included, which can store approximately 100,000 sets of calculated data such as Leq, or about 1,000,000 noise level readings (equivalent to 1.3 days of continuous data) at 100 milliseconds intervals. (Cards with optimal capacity can be installed according to the measurement.) 【Comparator Function】 Equipped with a comparator output function via an open collector output. Settings can be made in 1dB steps between 30 and 130dB. (Maximum applied voltage: DC24V; maximum current: DC60mA)

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Applicable Standards Measurement Law General Noise Meter JIS C 1509-1 (IEC 61672-1) Class 2 Measurement Functions (Main Calculation) Simultaneous measurement of all items with the selected time weighting and frequency weighting characteristics: Noise level Lp, equivalent noise level Leq, single event noise exposure level LE, maximum noise level Lmax, minimum noise level Lmin, time-averaged noise level LN (any selected 5 values) Measurement Functions (Additional Calculations) As a simultaneous measurement function with the main calculation, select one of the following items for measurement: Peak sound pressure level Lpeak, C-weighted peak sound pressure level Lcpeak, C-weighted equivalent sound pressure level Lceq, power average value of maximum noise level in the interval LAtm5, impulse noise level LAl, impulse equivalent noise level LAleq * LAtm5, LAl, LAleq can only be selected when A-weighting is set in the main calculation * Lceq can only be set when A-weighting or FLAT weighting is selected in the main calculation Measurement Time 10 seconds, 1, 5, 10, 15, 30 minutes, 1, 8, 24 hours, and manual (Maximum measurement time 200 hours)