A temperature transmitter is calibrated for 0°C to 200°C. During a 5-point calibration, the tech notes that the output is perfectly accurate going up the scale, but reads consistently 2 degrees high when coming down the scale. What physical phenomenon is the instrument exhibiting?

Question

Accepted Answer

Hysteresis. Hysteresis is the maximum difference in output for the same input value when approached from opposite directions (increasing vs decreasing).

Answer

Zero Shift

Answer

Span Error

Answer

Linearity Error

A temperature transmitter is calibrated for 0°C to 200°C. During a 5-point calibration, the tech notes that the output is perfectly accurate going up the scale, but reads consistently 2 degrees high when coming down the scale. What physical phenomenon is the instrument exhibiting?

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