When accounting for the total error of the pressure sensor, the error defined below should be applied. In order to determine the degree of error you have selected for a particular error in the pressure sensor, see the standard statement for that sensor in this catalog.
Note: In specific user use, some nominal indicators can be reduced or eliminated, for example, if a pressure sensor is used within half of the specified temperature scale, then the temperature error can be reduced by half, if the automatic zero adjustment technology is used, zero bias and zero drift error can be eliminated.
The zero bias is the sensor output when the same pressure is applied together on both sides of the diaphragm.
The quantum range is the algebraic difference between the output endpoints. Generally, the two endpoints are zero and full scale.
Zero temperature shift is a change in the zero point of a pressure sensor caused by a change in temperature. Zero offset is not a predictable error, and since each device can be shifted up or down, a change in temperature will cause the entire output curve to shift up or down along the voltage axis.
Sensitivity temperature shift is a change in the sensitivity of a pressure sensor caused by a change in temperature, which will cause a change in the slope of the sensor's output curve.
Linear error is the deviation of the output curve of the desired pressure scale sensor from a calibrated line, and one way to account for the linear error is the least squares, which mathematically provides the best fit line for the data point.
Another method is end base point linearity (T.B.L.) or end point linearity. T.B.L. is determined by drawing a straight line (L1) between the two data points on the output curve. Then, a perpendicular line is made from the line L1 to the output curve, and the intersecting data points are selected to reach the maximum length of the perpendicular line, and the length of the perpendicular line represents the linear error of the end base point.
Repeatability errors are deviations in the output reading added to the output reading in succession with any given input pressure while other conditions remain constant.
Hysteresis error is generally expressed as a combination of mechanical hysteresis and temperature hysteresis.
Mechanical hysteresis: This is a sensor error in the output at a given input pressure (up and down).
Temperature hysteresis is the deviation of the output before and after a temperature cycle at the cut-in input pressure.
The ratio change is the ratio of the sensor output to the power supply voltage under other conditions, and the ratio change error is the change in this ratio, which is generally expressed as the percentage of the pressure sensor's range.
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