à¤Ã×èͧÁ×ÍÇÑ´ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ Thermometer Humidity Meter à¤Ã×èͧÇÑ´¤ÇÒÁª×é¹ à¤Ã×èͧÇÑ´áʧ à¤Ã×èͧÇÑ´àÊÕ§ > DT-8820 : 4 in 1 digital Multifunction Environment Meter Sound / Light / Temperature / Humidity Meter ¤Ø³ÅѡɳТͧ ST-8820 / DT-8820 : 4 in 1 digital Multifunction Environment Meter The 4 in 1 digital Multifunction Environment Meter has been designed to combine the functions of Sound Level Meter, Light Meter, Humidity Meter, and Temperature Meter. It is an ideal Multifunction Environment Meter Instrument with scores of practical applications for professional and home use. The Sound Level function can be used to measure noise in factories, schools, offices, home, etc, checking acoustics of studios, auditoriums and hi-fi installations. The Light function is used to measure illuminance in the field. It is fully cosine corrected for the angular incidence of light. The light sensitive component used in the meter is a very stable, long life silicon ciode. The Humidity/Temperature use a humidity/semiconductor sensor and K type thermocouple. Features 4 in 1 for Light meter, Sound level meter, Humidity/Temperature meter. • 3 ½ large LCD display Data Hold and Max Hold Auto Power Off “OL” Over-range indication “BAT” Low battery indication Specifications Temperature: -20 ~ 750 Deg.C / -4 ~ 1400 Deg.F Light : 20, 200, 2000, 20000(2000 x 10 Lux) Humidity: 35%~95%RH Sound Level: 35dB~100dB Size(HxWxD): 251mm x 63.8mm x 40mm Weight: 250g à¤Ã×èͧÇÑ´ÃдѺàÊÕ§, áʧ, ¤ÇÒÁª×é¹ áÅÐÍسËÀÙÁÔ áºº 4 ã¹ 1 ¤Ø³ÅѡɳÐ੾ÒÐ ¡ÒÃÇÑ´áʧ ªèǧ¡ÒÃÇÑ´áʧ 0.01-20,000 Lux (20, 200, 2,000 áÅÐ 20,000 Lux ÊÓËÃѺªèǧ 20,000 Lux ÍèÒ¹¤èÒ x10) ¤èÒ¤ÇÒÁÅÐàÍÕ´ 0.01, 0.1, 1 ¤èÒ¤ÇÒÁ¶Ù¡µéͧ ±5% ¢Í§¤èÒ·ÕèÍèÒ¹ä´é + 10 dgts ¡ÒÃÃдѺÇÑ´àÊÕ§ ªèǧ¡ÒÃÇÑ´ÃдѺàÊÕ§ A LO(low)-weighting: 35-100dB A HI(high)-weighting: 65-130dB C LO(low)-weighting: 35-100dB C HI(high)-weighting: 65-130dB ¤èÒ¤ÇÒÁÅÐàÍÕ´ 0.1 dB ¤èÒ¤ÇÒÁ¶Ù¡µéͧ ±3.5 dB (·Õè 94 dB, 1kHz sine wave) ¡ÒÃÇÑ´¤ÇÒÁª×é¹ ªèǧ¡ÒÃÇÑ´¤ÇÒÁª×é¹ 25%RH - 95%RH ¤èÒ¤ÇÒÁÅÐàÍÕ´ 0.1%RH ¤èÒ¤ÇÒÁ¶Ù¡µéͧ ±5%RH (·Õè 25 ºC, 35% ~95%RH) ¡ÒÃÇÑ´ÍسËÀÙÁÔ ªèǧ¡ÒÃÇÑ´ÍسËÀÙÁÔ -20 ºC - 200 ºC / -20 ºC - 750 ºC / -4 ºF - 200 ºF / -4 ºF - 1400 ºF ¤èÒ¤ÇÒÁÅÐàÍÕ´ 0.1 ºC / 1 ºC / 0.1 ºF / 1 ºF ¤èÒ¤ÇÒÁ¶Ù¡µéͧ ±(3.0%+2ºC) / ±(3.0%+2ºC) 150 ºC , ±(3.0%+3ºC) 150 ºC ±(3.0%+2ºC) ±(3.0%+2ºC) 302 ºF , ± 3.0% 302 ºF ¤Ø³ÅѡɳзÑèÇä» ÊÒÁÒÃàÅ×Í¡ÇÑ´¤èÒä´é 4 ¿Ñ§¡ìªÑè¹ä´éá¡è àÊÕ§, áʧ, ¤ÇÒÁª×é¹ áÅÐÍسËÀÙÁÔ Ë¹éÒ¨ÍáÊ´§¼Å¢¹Ò´ãË­è 3 ½ ¹ÔéÇ«Ö觨ÐáÊ´§¤èÒã¹Ë¹èÇ¢ͧ Lux, ºC, %RH áÅÐ C&dB, A&dB, Lo%dB, Hi&dB, MAX HOLD, DATA HOLD Áտѧ¡ìªÑ¹¡ÒûԴà¤Ã×èͧàͧâ´ÂÍѵâ¹ÁÑµÔ (Auto power off) ÀÒÂËÅѧ¨Ò¡ 10 ¹Ò·Õ·ÕèäÁèÁÕ¡ÒÃãªé§Ò¹ ÁÕÊÑ­Åѡɳì "BAT"àµ×͹àÁ×èÍẵàµÍÃÕèÍè͹ áÅТéͤÇÒÁ "OL" àµ×͹àÁ×èͤèÒ·ÕèÇÑ´à¡Ô¹ªèǧ ÍѵÃÒ¡ÒÃÇÑ´(Measurement rate) »ÃÐÁÒ³ 1.5 ¤ÃÑ駵èÍÇÔ¹Ò·Õ ÍسËÀÙÁÔ·ÕèàËÁÒÐÊÁ㹡ÒÃà¡çºÃÑ¡ÉÒ¤×Í 10 ºC - 60 ºC(14 ºF - 140 ºF) ·Õè¤ÇÒÁª×é¹¹éÍ¡ÇèÒ 80%RH ¢¹Ò´à¤Ã×èͧ ÊÙ§ x ¡ÇéÒ§ x Ë¹Ò = 251.0mm x 63.8mm x 40mm ¹éÓ˹ѡ 250 ¡ÃÑÁ ãªéẵàµÍÃÕ袹Ҵ 9 âÇŵì à¤Ã×èͧÁ×ÍÇÑ´ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ Thermometer Humidity Meter à¤Ã×èͧÇÑ´¤ÇÒÁª×é¹ à¤Ã×èͧÇÑ´áʧ à¤Ã×èͧÇÑ´àÊÕ§ > DT-8820 : 4 in 1 digital Multifunction Environment Meter Sound / Light / Temperature / Humidity Meter