(F) A pressure transmitter has the following specifications:
Lower Range Limit = 0.5 MPa
Upper Range Limit = 10.5 MPa
Reference Accuracy = .05% of span
Span Error = .10% of span
Zero Error = .05% of span
Thermal Span Error = .10% of span
Overpressure Error = .09% of span
What is the total error budget in MPa?
Answers
Answer:
The exactness of a Pressure Transmitter
It is worth remembering that in the past few decades a large variety of equipment arrived to the market in several applications. The exactness of pressure characterization was really valued on the moment it could be translated into measurable values.
The entire pressure measurement system is constituted by the primary element that will be directly or indirectly contact with the process where the pressure changes occur and the secondary element (the pressure transmitter) that will translate this change into measurable values to be used on indication, monitoring and control.
Static performance or exactness depends on how well the transmitter is calibrated and how long it can maintain its calibration. Many times exactness is mistaken for precision, where exactness is associated with the proximity of the value and precision is related to the dispersion of the resulting values of a series of measurements.
The calibration of a pressure transmitter involves zero and span adjustment. Exactness normally includes non-linearity, hysteresis and repeatability effects.
Normally the exactness is indicated in % of the calibrated span.
Answer:
lower range limit =0.5Mpa