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2020 5 28 Differences in temperature class ratings may exist in which case the complete assembly takes the lowest of the individual component temperature classes for example a T4/T5 rated electronics housing assembled to a T4 rated sensor module is a T4 rated transmitter
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The sensor consists of two RTD elements One is the reference and the second is heated to a temperature above the process temperature The electronics detect the temperature difference between the two elements The temperature difference is greatest in air then decreases when cooling occurs due to a change in media.
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Figure 2.2 Hysteresis 2.1.5 Linearity Linearity expresses the deviation of the actual reading from a straight line If all outputs are in the same proportion to corresponding inputs over a span of values then input output plot is straight line else it will be non linear as shown in Figure 2.3.
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The sensor consists of two RTD elements One is the reference and the second is heated to a temperature above the process temperature The electronics detect the temperature difference between the two elements The temperature difference is greatest in air then decreases when cooling occurs due to a change in media.
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