(PSIS) measures pressure with respect to an internal reference chamber sealed at atmospheric pressure. Gauge pressure measurements below 100 PSI may require corrections for changes in atmospheric pressure and thermally induced ‘reference’ pressure errors.
internal heating of a transducer as a result of power dissipation.
That part of a transducer that responds directly to changes in input pressure.
The change in output per unit change in pressure for a specified supply voltage or current.
A change in sensitivity resulting from an environmental change such as temperature.
A popular term sometimes used to describe a transducer. Technically a sensor is an un-compensated, low-level output device that converts the measured to an electronic detectable change, (i.e., resistance, capacitance, and inductance).
Sending one bit at a time on a single transmission wire.
An ambiguous term sometimes used to describe a permanent change in output of a sensor. The terms Offset Shift' and 'Span Shift' are also sometimes used to describe output changes due to temperature. To avoid confusion
To process the form or mode of a signal so as to make intelligible to, or compatible with, a given device, including such manipulation as pulse shaping, pulse clipping, compensating, digitizing, and linearizing.
The maximum current an amplified circuit can accept („sink‟) on its output pin and still remain within the specified performance limits.
Any element that controls current without moving parts, heated filaments or vacuum gaps.
The maximum current an amplified circuit can supply („source‟) on its output pin and still remain within the specified performance limits.
The algebraic difference between the upper and lower limits of the pressure range.
The maximum deviation in measured Full Scale Span at Reference Temperature relative to the ideal (or target) Full Scale Span as determined from the Ideal Transfer Function.
The ratio of a change in measured output or reading to a change in pressure.
The ability of a transducer to retain its performance characteristics for a relatively long period of time, unless otherwise stated; stability is the ability of a transducer to reproduce output readings obtained during its original calibration at room conditions for a specified period of time. It is typically expressed as within % of full-scale output (FSO) for a period of “X” months.
A universally adopted standardized pressure reading for barometric pressure at sea level and equals precisely 1013.25mb absolute. Standard atmosphere is a particularly useful datum point in altitude measurement since all altimeters are calibrated to this pressure.
A calibration recording output vs. pressure at fixed points at room temperature.
The error band applicable at room temperature.
The pressure of a fluid exerted normal to the surface along which a fluid flows. A fluid can be liquid or gaseous.
The range of temperature between minimum and maximum that can be applied without causing the sensor to fail to meet the specified operating characteristics.
A sensing device providing a change in electrical resistance proportional to the level of applied stress.
The voltage (current) applied to the positive and negative (ground) input terminals.
The range of voltage excitation which can be supplied to the product to produce an output which is proportional to pressure but due to Supply Voltage Ratiometricity errors may not remain within the specified performance limits.
The range of voltage excitation required by the product to remain within the specified performance limits for Supply Voltage Ratiometricity.
The maximum deviation in ratiometric output of the product (Output divided by Supply Voltage) resulting from a voltage excitation which is different from the Reference Supply Voltage but remaining within the Supply Voltage Ratiometric Limits.