Endress+Hauser Proline Prosonic Flow 93, Руководство по эксплуатации

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Technical data Proline Prosonic Flow 93 PROFIBUS DP/PA
156 Hauser
10.1.6 Performance characteristics
Reference operating
conditions • Fluid temperature: +20 to +30 °C
• Ambient temperature: +22 °C ± 2 K
• Warm-up period: 30 minutes
Installation:
• Sensors and transmitter are grounded.
• The measuring sensors are correctly installed.
Maximum measured error Measured error clamp-on version
The measured error depends on a number of factors. A distinction is made between the measured
error of the device (Prosonic Flow 93 = 0.5 % of the measured value) and an additional installation-
specific measured error (typically 1.5 % of the measured value) that is independent of the device.
The installation-specific measured error depends on the installation conditions on site, such as the
nominal diameter, wall thickness, real pipe geometry, fluid, etc.
The sum of the two measured errors is the measured error at the measuring point.
A0011347
Fig. 103: Example of the measured error in a pipe with a nominal diameter DN > 200 (8")
a Measured error of the device (0.5 % o.r. ± 3 mm/s)
b Measured error due to installation conditions (typically 1.5 % o.r.)
c Measured error at the measuring point: 0.5 % o.r. ± 3 mm/s + 1.5 % o.r. = 2 % o.r. ± 3 mm/s
Measured error at the measuring point
The measured error at the measuring point is made up of the measured error of the device
(0.5 % o.r.) and the measured error resulting from the installation conditions on site. Given a flow
velocity > 0.3 m/s
(1 ft/s)
and a Reynolds number > 10000, the following are typical error limits:
0
0.5
2.0
3.5
%
m/s 2 4 6 8 10 12
b
c
a
Sensor
Nominal diameter Device error limits +
Installation-specific
error limits (typical)
→
Error limits at the
measuring point (typical)
Prosonic P DN 15 (½") ±0.5 % o.r. ± 5 mm/s + ±2.5 % o.r.
→
±3 % o.r. ± 5 mm/s
DN 25 to 200 (1 to 8") ±0.5 % o.r. ± 7.5 mm/s + ±1.5 % o.r.
→
±2 % o.r. ± 7.5 mm/s
> DN 200 (8") ±0.5 % o.r. ± 3 mm/s + ±1.5 % o.r.
→
±2 % o.r. ± 3 mm/s
Prosonic W DN 50 to 200 (2 to 8") ±0.5 % o.r. ± 7.5 mm/s + ±1.5 % o.r.
→
±2 % o.r. ± 7.5 mm/s
> DN 200 (8") ±0.5 % o.r. ± 3 mm/s + ±1.5 % o.r.
→
±2 % o.r. ± 3 mm/s
o.r. = of reading