范围由上限值和下限值所限定的一个量的两个极限之间的区域称为范围。例如0～100℃;0.2～1.0公斤/厘米~2;10～100升/分等等。在自动化仪表中经常会遇到的有输入范围、输出范围、调节范围、被测(变)量范围、被测信号范围、标尺范围等等。 (范围)上(下)限值仪表调整好以后能够按照规定精度进行测量的被测(变)量的最高(最低)值。 The area between the two limits of an amount that is defined by the upper limit and the lower limit is called the range. For example, 0 to 100 ° C .; 0.2 to 1.0 kg / cm 2; and 10 to 100 L / min. Often encountered in the automation instrumentation input range, the output range, the adjustment range, measured (variable) range, the measured signal range, the scale range and so on. (Range) Upper (Lower) Limits The highest (lowest) value of the measured (variable) amount that can be measured with the specified accuracy after the instrument is adjusted.