Distance Meter Laser Ultrasonic à¤Ã×èͧÇÑ´ÃÐÂÐ à¤Ã×èͧÁ×ÍÇÑ´ÃÐÂÐ àÅà«ÍÃìÇÑ´ÃÐÂÐ sensor ÇÑ´ÃÐÂÐ àÅà«ÍÃìÇÑ´ÃÐÂÐ ÇÑ´ÃÐÂÐàÅà«ÍÃì ÇÑ´ÃÐÂзҧ ¡ÅéͧÇÑ´ÃÐÂÐ ÅéÍÇÑ´ÃÐÂÐ à·»ÇÑ´ÃÐÂÐ > Distance Meter à¤Ã×èèͧÇÑ´ÃÐÂÐ Distance Meter Distance Meter à¤Ã×èèͧÇÑ´ÃÐÂÐ à¤Ã×èͧÇÑ´¾×é¹·Õè à¤Ã×èͧ¤Ó¹Ç¹»ÃÔÁҵà AR-831 à¤Ã×èͧÇÑ´ÃÐÂзҧ ÁÔàµÍÃìÇÑ´ÃÐÂзҧ à¤Ã×èͧÁ×ÍÇÑ´ÃÐÂÐ ªèǧÇÑ´ 0.3 ¶Ö§ 15 àÁµÃ Function: 1. Measures in imperial/metric 2.Star point selection 3.Computes areas and volumes 4.Sum of lengths. 5.Auto/manual shut-off 6.LCD backlight 7.Low battery warning 8.Key sound, beeps for wrong reading finding and reading confirmation. Requirement of measurement : Ultrasonic technology is adopted in this unit so the unit should be hold toward the surface of ther object to measure at a rectangular angle. To assure the accuracy that rectangular angle should be controlled less than +/-5% deviations. For rough surface subject, this unit can't reach precision measuring stated in this manual. Specification: Measuring rang settings: 0.3m--1.5m (10 inch--50 feet) SET: Switch measures from front or rear of unit. M/Ft: Switch measures in metric/imperial. Accuracy: +/-1% of reading. Response time: 2 sec Power supply: 4 * AAA batteries Stand-by current: 50uA Before measuring current: 10mA Operating current: 45mA Auto shut-off: 60 sec(approx) LCD backlight: active in 6 sec(approx) Operation environment temperature: 0 --40 degree celsius. Humidity: 45%--90% Store temperature: -10 to 60 degree celsius Dimension: 54*100*27mm Weight: 200g(with battery) Distance Meter Laser Ultrasonic à¤Ã×èͧÇÑ´ÃÐÂÐ à¤Ã×èͧÁ×ÍÇÑ´ÃÐÂÐ àÅà«ÍÃìÇÑ´ÃÐÂÐ sensor ÇÑ´ÃÐÂÐ àÅà«ÍÃìÇÑ´ÃÐÂÐ ÇÑ´ÃÐÂÐàÅà«ÍÃì ÇÑ´ÃÐÂзҧ ¡ÅéͧÇÑ´ÃÐÂÐ ÅéÍÇÑ´ÃÐÂÐ à·»ÇÑ´ÃÐÂÐ > Distance Meter à¤Ã×èèͧÇÑ´ÃÐÂÐ Distance Meter Distance Meter à¤Ã×èèͧÇÑ´ÃÐÂÐ à¤Ã×èͧÇÑ´¾×é¹·Õè à¤Ã×èͧ¤Ó¹Ç¹»ÃÔÁҵà AR-831 à¤Ã×èͧÇÑ´ÃÐÂзҧ ÁÔàµÍÃìÇÑ´ÃÐÂзҧ à¤Ã×èͧÁ×ÍÇÑ´ÃÐÂÐ à¤Ã×èͧÁ×ÍÇÑ´ÃÐÂзҧ ÇÑ´ÃÐÂзҧ