Pressure sensors
B58621V2894B767
Differential pressure transmitter with I²C output
AVD 7.000 KA D4 Z14E L ST B767
Symbols and terms
1)
Storage temperature range Tst
A storage of the pressure sensor within the temperature range Tst,min up to Tst,max
and without applied pressure and supply voltage will not affect the performance of the pressure sensor.
2)
3)
Operating temperature range Ta
An operation of the pressure sensor within the temperature range Ta,min up to Ta,max
will not affect the performance of the pressure sensor.
Compensated temperature range Tc
While operating the pressure sensor within the temperature range Tc,min up to Tc,max
,
the deviation of the output signal from the values at 25 °C will not exceed the temperature coefficients.
Out of the compensated temperature range, the deviations may increase.
4)
5)
6)
7)
Rated pressure pr
Within the rated pressure range pr,min up to pr,max the signal output characteristic corresponds to this specification. Rated
pressure pr is calculated as difference between p1 and p2. (pr = p1 - p2).
Overpressure pOV
Pressure cycles within the pressure range 0 up to pov will not affect the performance of the pressure sensor. pov is
calculated as difference between p1 and p2. (pr = p1 - p2).
Burst pressure pburst
Pressure cycles within the pressure range 0 up to pburst will not affect the hermeticety of the pressure sensor.
Performance of the pressure sensor may be affected. pov is calculated as difference between p1 and p2. (pr = p1 - p2).
Line burst pressure pline
Pressure working symmetrically on both pressure ports. Pressure cycles within the range 0 up to pburst will not affect the
hermeticety of the pressure sensor. Performance of the pressure sensor will not be affected irreversibly. High line
pressure can cause high pressure peaks working on one side of the sensor and affecting the sensor.
8)
Supply voltage VCC
VCC,max is the maximum permissible supply voltage, which can be applied without damages.
VCC,min is the minimum required supply voltage, which has to be applied for normal operation.
9)
Supply current ICC
ICC, is current consumption of the pressure sensor in operation.
10)
11)
Offset DA0
The offset DA0 is the digital signal output DA(p = 0).
Pressure output span (Full Scale)
DFS = FS = DA(pr,max) – DA(pr,min
)
12)
13)
Offset error EA0
Deviation of the offset signal output DA(p = 0) to nominal value.
Non-linearity L (including pressure hysteresis)
The nonlinearity is the deviation of the real sensor characteristic DA = f(p) from the ideal straight line.
It can be approximated by a polynomial of second order, with the maximum at px = pr / 2 .
The equation to calculate the nonlinearity is:
DA (px ) DA0 px
DA (pr ) DA0 pr
L
14)
15)
Characteristic curve error EC
Within the compensated temperature range Tc,min up to Tc,max
the error of characteristic curve Ec is the maximum deviation to the ideal characteristic curve, including non-linearity,
calibration tolerances as well as temperature errors of offset and span.
Out of the compensated temperature range, the deviations may increase.
Total error Etotal = E0LTS + EC
Sum of Offset error and characteristic curve error. The offset error EA0 is a parallel translation of the whole tolerance
zone of the characteristic curve error. A periodic (to be defined by the user) offset correction at a defined pressure
(e.g. zero) may considerably improve the measurement accuracy.
TPS PRS T PD
Please read Cautions and warnings and
Page 7 of 10
Important notes at the end of this document.
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