Span and range refer to respectively?
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On the watches purchased by our factory, the instruction manuals for some of these watches use the terms \"span\" and \"range\" when referring to the measurement range. What do \"span\" and \"range\" mean respectively? For example: span 0.1 to 1 kPa, range -1 to 1 kPa
Reply 1# wuhuan2080: Both “span” and “range” refer to the measurement range. The only difference is that “span” denotes the actual measurement range of the instrument, while “range” refers to its maximum limit. The measurement range lies within this maximum limit, which is also the maximum capacity of the instrument’s sensor. I’m not sure if my explanation is clear and understandable, nor whether it’s correct.
Range refers to the entire measurement range of the instrument. For example, the -1 to 1 kPa you mentioned is the measurement range of the entire gauge. Span refers to the optimal upper and lower measurement limits of the instrument. For example, the optimal linear range for a pressure gauge is within 1/3 to 2/3 of its full scale, as readings are more accurate within this interval. On many imported online analytical instruments, the term \"span\" refers to the upper limit of the measurement. It also depends on where it will be applied. From the information you provided, it seems that the previous option is the one indicated. The range of rang is broader than that of span; span can be an interval value or a single-point value, but rang is definitely an interval value.
Range refers to the lower and upper measurement limits that an instrument can achieve while meeting accuracy requirements; it represents the instrument’s own metrological performance. The span is the measurement range selected on-site within the limits that ensure measurement accuracy, and it is less than or equal to the range.
I’m learning it now... Thank you all