Temperature range and temperature limit for pressure sensors ? is there an improvement? My intuitive answer would be: Yes! The initial term describes a section and the second its border. On second glance, however, I have to conclude that both words ultimately express the same thing in relation to temperatures: Range and limit are defined by way of a lower and upper value, for example 0 ? Steal �C. The relevant standard nevertheless defines a difference. Why?
IEC 61987 speaks of two different specification characteristics
The standard referred to is IEC 61987. This deals, among other things, with the properties of fluid sensors, which likewise incorporate pressure sensors. With ?range? and ?limit?, the standard designates two different specification characteristics. Accordingly, the temperature range describes the span where the instrument specifications must apply ? first and foremost, the accuracy. The temperature limit, however, indicates the min/max values between that your instrument may be operated without damage. With this, the instrument specifications don’t need to be adhered to at all.
What may sound a bit pedantic, makes sense from a technical point of view. This could be illustrated by the following exemplory case of a pressure sensor: The instrument is supposed to provide solid measured values at an ambient temperature selection of 0 ? 100 �C. Concurrently, 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, or 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 specific measuring components, exhibit a relatively large, often non-linear temperature error. Without further measures, a reliable pressure measurement would be impossible. Therefore, the maker must compensate for the temperature so that you can bring the error right down to an acceptable level. From an economic viewpoint, the limitation to a selected temperature range is practical, or is even absolutely necessary.
The distinction between temperature range and temperature limit pertains to both the ambient temperature and the medium temperature. Additionally it is 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 if the normal user, without knowledge of standards, understands it intuitively. Which inevitably results in Assured of whether you will find a better linguistic distinction. But, I must admit, the answer is outside my ?range?.
Note
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