Endress+Hauser Proline Promass E 500 PROFINET Operating Instructions Manual page 267

Proline Promass E 500 PROFINET
Influence of medium
pressure
Design fundamentals
Endress+Hauser
3
[kg/m ]
14
12
10
8
6
4
2
0
-80
 44 Field density calibration, for example at +20 °C (+68 °F)
Temperature
±0.005 · T °C (± 0.005 · (T – 32) °F)
The table below shows the effect on accuracy of mass flow due to a difference between
calibration pressure and process pressure.
o.r. = of reading
It is possible to compensate for the effect by:
• Reading in the current pressure measured value via the current input.
• Specifying a fixed value for the pressure in the device parameters.
Operating Instructions.
DN
[mm] [in]
8 ³⁄₈
15 ½
25 1
40 1½
50 2
80 3
o.r. = of reading, o.f.s. = of full scale value
BaseAccu = base accuracy in % o.r., BaseRepeat = base repeatability in % o.r.
MeasValue = measured value; ZeroPoint = zero point stability
Calculation of the maximum measured error as a function of the flow rate
Flow rate
ZeroPoint
⋅
100
³
BaseAccu
ZeroPoint
⋅
< 100
BaseAccu
-40 50
0
40 80 120 160 200 240 280 320 [°F]
-40 0
[% o.r./bar]
–0.009
–0.020
Maximum measured error in % o.r.
± BaseAccu
A0021332
ZeroPoint
⋅
±
100
MeasValue
A0021333
Technical data
100 150
[°C]
[% o.r./psi]
no influence
no influence
no influence
no influence
–0.0006
–0.0014
A0016609
A0021339
A0021334
267