Pressure Error

Pressure Error is the maximum difference between true pressure and the inferred from the output for any pressure in the operating pressure range. 

Inaccuracies in pressure instrumentation occur when the output signal deviates from the desired measuring result. When pressure readings are higher or lower than actual, you risk the performance and safety of your application. Therefore, it is important to recognize the errors – and to understand how they come about. The three main errors that affect pressure sensor accuracy are:

●Zero-point error – The start of the measuring range is too high or too low (this is the zero offset), thus shifting the entire scale up or down by that zero offset value.

●Span error – The distances between the individual divisions (the span) from the zero point to the full-scale value are even but wrong, which has the effect of magnifying errors at the upper end of the scale.

●Non-linearity – The distances between the individual divisions from the zero point to the full-scale value are not even (non-linear), thus making the ideal straight line into a curve.