Lutron SL-4022 Sound Level Meter

Function dB (A & C frequency weighting), Time weighting (Fast, Slow),

Max. hold, Max. hold reset, AC output.

Measurement Range 3 ranges

( 30 - 70 dB, 60 - 100 dB, 90 - 130 dB ),

Resolution 0.1 dB.

Accuracy Frequency weighting meet IEC 61672 Class 1, calibrating input signal on 94 dB the accuracy of frequency

(23 5 ) weighting is specified as following:

31.5 Hz : 2.0 dB, 63 Hz : 1.5 dB, 125 Hz : 1.5 dB,

2 KHz : 1.6 dB, 4 KHz : 1.6 dB, 8 KHz : + 2.1 dB to -3.1 dB,

Frequency Characteristics of A & C.

Weighting Network A weighting - The characteristic is simulated as "Human Ear Listing" response. Typical, if making

the environmental sound level measurement, always select to A weighting.

C weighting - The characteristic is near the "FLAT" response. Typical, it is suitable for checking the noise of machinery (Q.C. check) & knowing the sound pressure level of the tested

equipment.

Frequency 31.5 Hz to 16 KHz. * Accuracy is tested within 31.5 Hz to 8 KHz.