The temperature is low in winter and spring. Make sure the hand-held infrared thermometer is calibrated before use. When using the thermometer outdoors or using it to take the temperature of people who are just back from outside, point the thermometer at such body parts as the wrist or neck that are covered by the clothing or scarf.

室外測體溫怎樣才能保證準確？

冬春季氣溫較低，手持紅外體溫檢測儀在使用之前應校準。在測量剛從室外進入室內的人員，或在室外使用時，建議測量衣服、圍巾覆蓋的部位，如手腕、脖子。