â·ÃÊͺ¶ÒÁÃÒ¤Ò à¤Ã×èͧÁ×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤Ã×èͧÇÑ´ÃдѺ¤ÇÒÁ´Ñ§àÊÕ§ Sound Meter > Sound Level Meter à¤Ã×èͧÇÑ´àÊÕ§ à¤Ã×èͧÇÑ´àÊÕ§ Real time Octave Band Analyzer 407790 Real time Octave Band Analyzer 407790 Real time Octave Band Analyzer Type 2 integrating sound level meter with Octave and 1/3 Octave Band Real Time display 160x160 dot matrix backlit LCD displays Leq, LE, Lmax, Lmin, and Lp Built-in memory stores up to 12,280 records in SLM mode and 1024 data points in 1/1 or 1/3 octave mode Stored data can be easily transferred to a PC via RS-232 interface and analyzed using software and cable provided A, C, and Flat weighting with Fast/Slow response time 25Hz to 10kHz frequency response Meets ANSI and IEC Type 2 standards Real time clock with Year, Month, Day, Hour, Minute, and Second display Applicable standards: IEC 60651 Type 2, IEC 60804 Type 2, IEC 1260-1995, ANSI S1.4 Type 2 Microphone: 1/2-inch Electret condenser microphone Accuracy: ±1.5dB (ref 94dB @ 1kHz) Measurement range: 30dB to 130dB Measurement function: Lp , Leq , LE , Lmax , Lmin, La, Lc Frequency range: 25Hz ~ 10kHz Sound level meter display: Numerical : 4 digits, up data cycle 0.5s, resolution 0.1dB Bar graph : Scale range 100dB , update cycle 0.125s, resolution 0.1dB Real time clock : Year, Month, Day, Hour, Minute, Second 1/1- 1/3 Analyzer level range: 7 0 d B 1/1 Octave and 1/3 Octave: 1/1 Octave band center frequencies : (9 bands): 31.5Hz, 63Hz, 125Hz, 250Hz, band filters 500Hz, 1kHz, 2kHz, 4kHz, and 8kHz. 1/3 Octave band center frequencies : (27 bands) : 25Hz, 31.5Hz, 40Hz, 50Hz,63Hz, 80Hz, 100Hz, 125Hz, 160Hz, 200Hz, 250Hz, 315Hz, 400Hz, 500Hz, 630Hz, 800Hz, 1kHz, 1.25kHz, 1.6kHz, 2kHz, 2.5kHz, 3.15kHz, 4kHz, 5kHz, Hz, 8kHz 10kHz Signal output: AC output : 2 Vrms (at full scale): DC output : 10mVDC / dB Power: Four type C size 1.5V batteries, External DC power: 6V, 1A Battery life: Approx. 2hrs Dimensions & Weight: 13.6 x 3.9 x 2.4" (34.5 x 10 x 6 cm); 33.5oz (950g)