Endress+Hauser Proline Promass E 300 HART, Руководство по эксплуатации

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Proline Promass E 300 HART Technical data
Hauser 187
o.f.s. = of full scale value
When there is a difference between the temperature for zero point adjustment and the
process temperature, the additional measured error of the sensor is typically ±0.0002 %
o.f.s./°C (±0.0001 % o. f.s./°F).
The effect is reduced if zero point adjustment is performed at process temperature.
Density
When there is a difference between the density calibration temperature and the process
temperature, the typical measured error of the sensor is
±0.0001 g/cm 3 /°C (±0.00005 g/cm 3 /°F). Field density calibration is possible.
[kg/m ]
3
[°C]
-40
0
-80
40 80 120 160 200 240 280 320 [°F]
-40 0 50 100 150
0
2
4
6
8
10
14
12
A0016609
 37 Field density calibration, for example at +20 °C (+68 °F)
Temperature
±0.005 · T °C (± 0.005 · (T – 32) °F)
Influence of medium
pressure
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 [% o.r./bar] [% o.r./psi]
[mm] [in]
8 ³⁄₈ no influence
15 ½ no influence
25 1 no influence
40 1½ no influence
50 2 –0.009 –0.0006
80 3 –0.020 –0.0014
Design fundamentals o.r. = of reading, o.f.s. = of full scale value
BaseAccu = base accuracy in % o.r., BaseRepeat = base repeatability in % o.r.