â·ÃÊͺ¶ÒÁÃÒ¤Ò Datalogger Sound Level Meter DT-173 à¤Ã×èͧ Á×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤Ã×èͧÇÑ´ÃдѺ¤ÇÒÁ´Ñ§àÊÕ§ à¤Ã×èͧÇÑ´àÊÕ§ Sound Meter Datalogger Sound Level Meter DT-173 ºÑ¹·Ö¡¢éÍÁÙÅ µèÍà¢éÒ Computer ä´é DT-173 CE certified digital sound / noise level datalogger. This meter has a built-in USB port which connects to a Windows PC for uploading the recorded data. This is an ideal instrument for noise monitoring in factory, school, business and traffic areas. This meter conforms to the IEC61672-1 Class 2 standards. This device operates on a 3.6V Lithium battery. This device is very accurate (+/- 1.4 dB) and durable, an ideal companion for your field projects. Please note that the FREE Windows software is provided AS IS. There is no software development kit nor engineering support for the software. FEATURES * Conforms to the IEC61672-1 Class 2 for sound level measurement * NORM and PEAK mode * Over range indication * A & C frequency weighting * Fast (125ms) and slow (1s) time weighting * Calibration via software * Manual and automatic start modes SPECIFICATIONS Accuracy +/- 1.4 dB Frequency range 31.5 Hz - 8KHz Dynamic range 50dB Measuring ranges Auto: 30 -130 dB Time weighting Fast: 128 ms Slow: 1 sec Microphone 1/2 inch electret condener microphone Data memory 129920 samples Battery life about 240 hours LED indicator Green (operating) and Yellow (memory full) LED OS compatibility Windows 2000, XP or Vista