Endress+Hauser Prosonic Flow 90, Operating Instructions Manual

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10 Technical data Proline Prosonic Flow 90
98 Hauser
10.1.6 Performance characteristics
Reference operating
conditions • Fluid temperature: +28 °C ± 2 K
• Ambient temperature: +22 °C ± 2 K
• Warm-up period: 30 minutes
Installation:
• Inlet run >10 x DN
• Outlet run > 5 x DN
• Sensor and transmitter grounded.
Maximum measured error For flow velocities of > 0.3 m/s and a Reynolds number of >10000, the system accuracy is:
• Pipe diameter DN < 50: ± 0.5 % o.r. ± 0.1 % o.f.s. *
• Pipe diameter 50 < DN < 200: ± 0.5 % o.r. ± 0.05 % o.f.s.
• Pipe diameter DN > 200: ± 0.5 % o.r. ± 0.02 % o.f.s.
o.r. = of reading
o.f.s. = of full scale value
* plastic pipes only
As standard, the system is dry-calibrated. The dry calibration procedure results in an additional
uncertainty of measurement. This measuring uncertainty is better than 1.5% typically. During dry
calibration, the characteristics of the pipe and the fluid are derived to calculate the calibration factor.
As verification of the accuracy, an accuracy report is offered as an option.
Accuracy is verified using a stainless steel pipe.
A0001149
Fig. 53: Max. measured error (wet calibration) in % of reading
a = pipe diameter DN > 200
b = pipe diameter 50 < DN < 200
c = pipe diameter DN < 50
Repeatability max. ± 0.3% for flow velocities > 0.3 m/s
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
%
m/s
a
b
c
2 4 6 8 10 12 14