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    August 15

    如何正确选择红外测温仪?

         由于红外测温仪的系列、型号很多、每种型号都有自己的参数、性能和功能、如测温范围、光学分辨率(距离系数)、工作波长、响应时间、工作环境条件和信号处理输出显示方法等。因此正确选择红外测温仪型号对 用户来说是十分重要的。
    正确选择红外测温仪需要掌握"三大要素,三项原则"。三大要素:
    1/目标的温度范围: 选择红外测温仪的测温范围一般是由被测目标温度来决定的,如果被测目标最高为800℃,最低为250℃,那么我们便可选择比上限略高、比下限略低的一个合适测温范围。
    2/目标大小与测量距离: 测量距离与目标直径的比值--距离系数(D:S),是红外测温仪一个非常重要的参数,"D"是指测量距离,"S"是指目标的直径。
         如果一个红外测温仪的D:S为8:1的话,也就是说:一个被测目标的大小为1个单位,那么红外测温仪可以在被测目标大小的8个单位的距离内精确测量三大原则:
    1/要求原则: 首先要将测量要求和所要解决的问题弄清,如:被测目标大小,测量距离,被测目标材料,目标所处环境,响应速度要求,精度要求等。
    2/对比原则: 将测量要求和所要解决的问题与现有各种测温仪进行对比,选择出能够满足上述要求的仪器。
    3/搭配原则: 在诸多能够满足要求的各种型号中,选择出性能、功能和价格方面的最佳搭配。 由于实际情况可能还要"奥妙"些,但若掌握了以上要点,相信您就是红外测温仪的"伯乐"了!

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