Temperature range and temperature limit for pressure sensors ? will there be an improvement? My intuitive answer would be: Yes! The initial term describes a section and the second its border. On second glance, however, I must conclude that both words ultimately express the same thing in relation to temperatures: Range and limit are defined by a lower and upper value, for instance 0 ? 100 �C. The relevant standard nevertheless defines an improvement. Why?
IEC 61987 speaks of two different specification characteristics
The standard described is IEC 61987. This deals, among other things, with the properties of fluid sensors, which also include pressure sensors. With ?range? and ?limit?, the standard designates two different specification characteristics. Accordingly, the temperature range describes the span in which the instrument specifications must apply ? first and foremost, the accuracy. The temperature limit, on the other hand, indicates the min/max values between which the instrument could be operated without damage. With Wanted , the instrument specifications do not have to be adhered to at all.
What may sound a little pedantic, makes perfect sense from a technical perspective. This could be illustrated by the next exemplory case of a pressure sensor: The instrument is supposed to provide solid measured values at an ambient temperature selection of 0 ? 100 �C. As well, the sensor should never suffer any damage at ambient temperatures between -20 �C and 0 �C. In this range, however, it does not have to provide accurate measuring results, and even measure.
The difference between temperature range and temperature limit is plausible
This sounds paradoxical initially, but is plausible on closer inspection. Pressure sensor elements, i.e. the actual measuring components, exhibit a comparatively large, often non-linear temperature error. Without further measures, a trusted pressure measurement would be impossible. Therefore, the manufacturer has to compensate for the temperature so as to bring the error down to a satisfactory level. From an economic point of view, the limitation to a selected temperature range is practical, or is even essential.
The distinction between temperature range and temperature limit applies to both ambient temperature and the medium temperature. It is also useful for other specification characteristics, for example overpressure.
Conclusion
Yes, there is a difference between range and limit in the normative world of pressure sensor technology. And yes, it creates technical sense. However, I doubt whether the normal user, without understanding of standards, understands it intuitively. Which inevitably results in the question of whether you will find a better linguistic distinction. But, I must admit, the answer is outside my ?range?.
Note
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