à¤Ã×èͧÁ×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤Ã×èͧÇÑ´ÃдѺ¤ÇÒÁ´Ñ§àÊÕ§ Sound Meter > à¤Ã×èͧÇÑ´àÊÕ§ 16,000 point Datalogging Sound Level Meter Extech 407764 " High accuracy meets ANSI and IEC 651 Type 2 standards" 16,000 point Datalogging Sound Level Meter Type 2 meter with datalogging memory for 16,000 records plus PC interface and software High accuracy meets ANSI and IEC 651 Type 2 standards Large LCD with Fast 50 segment bargraph display Stored data can be transferred to a PC via RS-232 interface Real time and Date are logged with data; Max Hold function Features Autoranging over 6 ranges from 30 to 130dB with high accuracy to +/- 1.5dB and 0.1 dB resolution Large LCD display with function indication and fast 50 segment bar graph display Time and Date are logged with data Stored data can be easily transferred to a PC via RS-232 interface and analyzed using software & cable provided A & C weighting and Fast/Slow response Tripod mount provided on rear Max Hold function Meets ANSI S1.4 Type II and IEC 651 standards Internal self test when powered ON Detachable 0.52" (13.2mm) diameter condenser microphone Analog AC/DC recorder output 10m VDC/decibel Optional microphone extension cable for measurements in enclosures and other remote locations (407764-EXT) Dimensions: 10.4x2.8x0.8" (265x72x21mm); Weight: 10oz. Complete with microphone wind cover, Windows 95/98/NT/2000/ME/XP compatible software, Serial cable, 4 AA batteries, and carrying case à¤Ã×èͧÇÑ´ÃдѺ¤ÇÒÁ´Ñ§àÊÕ§ Sound Level Meter à¤Ã×èͧÇÑ´àÊÕ§ 16,000 point Datalogging Sound Level Meter Extech 407764