Performance Characteristics - Endress+Hauser PROline prosonic flow 90 Operating Instructions Manual

10 Technical data
Reference operating
conditions
Maximum measured error
Repeatability
92
10.1.6

Performance characteristics

x Fluid temperature: +28 °C ± 2 K
x Ambient temperature: +22 °C ± 2 K
x Warm-up period: 30 minutes
Installation:
x Inlet run >10 x DN
x Outlet run > 5 x DN
x Sensor and transmitter grounded.
For flow velocities of > 0.3 m/s and a Reynolds number of >10000, the system accuracy
is:
x Pipe diameter DN < 50: ± 0,5 % o.r. ± 0,1 % o.f.s. *
x Pipe diameter 50 < DN < 200: ± 0.5 % o.r. ± 0.05 % o.f.s.
x 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.
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
max. ± 0.3% for flow velocities > 0.3 m/s
PROline Prosonic Flow 90
Endress+Hauser