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Words about Pressure Sensor
Time: 2020.05.23

Absolute Pressure: it is measured relative to a full vacuum. Output is proportional to the difference between applied pressure and a built-in vacuum reference.


Gauge Pressure: it is the pressure relative to atmospheric pressure. Gauge pressure is positive for pressures above atmospheric pressure, and negative for pressures below it. Output is proportional to the difference between applied pressure and atmospheric (ambient) pressure.


Differential Pressure: it is the difference between any two applied pressures at Port 1& Port 2. Output is proportional to the difference between the pressures applied to each port (Port 1 – Port 2).


Accuracy(Total Error Band):is the max. deviation at 25°C in output from ideal transfer function at any pressure or temperatureover the specified ranges, units are in percent of full scale span (%FSS), all errors by consists of: Offset; Full Scale Span; Linearity(Non-linearity); Repeatability; Hsteresis(pressure&temperature); Thermal effect on offset(offset shift); Thermal effect on span(Span Shift).


Offset( Zero output) : it is defined as the output voltage at the minimum rated pressure.


Full Scale Output (FSO): it is defined as the output voltage at the maximum or full rated pressure.


Full Scale Span (FSS): it is the algebraic difference between the output voltage at full-scale pressure and the output at zero pressure.


Non-linearity(Linearity): the deviation of measured output from "Best Straight Line" through three points (Offset pressure, FS pressure and ½ FS pressure)at constant temperature.


Repeatability: the deviation of measured output when the same pressure is applied continuously, with pressure approaching from the same direction within the specified operating pressure range,under the same operating conditions.


Pressure Hysteresis: the deviation of measured output at any pressure within the specified range, when this pressure is applied continuously, with pressure approaching from opposite directions within the specified operating pressure range, under the same operating conditions.


Temperature Hysteresis: the deviation of measured output at any temperature within the operating temperature range, after the temperature is cycled to and from the minimum or maximum operating temperature points, with zero differential pressure applied.


TcOffset(TcO:Temp. Coefficient of Offset): the deviation of measured output with minimum rated pressure applied, over the temperature range of 10° to 60°C, relative to 25°C.


TcSpan(TcS:Temp. Coefficient of Span):the deviation of measured output over the temperature range of 10° to 60°C, relative to 25°C.


Pressure range(Operating pressure): The maximum pressure that may be applied to the sensor in continuous use.


Overpressure(Proof pressure): the maximum pressure which may be applied without causing durable shifts of the electrical parameters of the sensing element and remain the specification once pressure is returned to the operating pressure range.


Burst Pressure: the maximum pressure which may be applied without causing damage to the sensing die or leaks; The sensor should not be expected to recover function after exposure to any pressure beyond the burst pressure.


Compensated Temperature: the temperature range over which the sensor have an output proportional to pressure within the specified performance limits.


Operating Temperature (Aient Temperature): mbthe temperature range over which the sensor have an output proportional to pressure but may not remain within the specified performance limits.


Response Time: it is defined as the time for the incremental change in the output from 10% to 90% of full-scale pressure.


Warm-up Time: it is defined as the time required for the sensor to meet the specified output after the pressure become stabilized.

 
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