Endress+Hauser Proline Prosonic Flow W 400 - Page 160

Technical data Proline Prosonic Flow W 400 HART
160 Endress+Hauser
0
0.5
2.0
3.5
[%]
[m/s]
2 4 6 8 10 12
2
3
1
[ft/s]
14
0 2010 30 40
50
A0041972
 55 Example of the measurement error in a pipe with a nominal diameter DN > 200 (8")
1 Measurement error of measuring device: 0.5% o.r. ± 3 mm/s (0.12 in/s)
2 Measurement error due to installation conditions: typically 1.5% o.r.
3 Measurement error at the measuring point: 0.5% o.r. ± 3 mm/s (0.12 in/s) + 1.5% o.r. = 2% o.r. ±
3 mm/s (0.12 in/s)
Measurement error at the measuring point
The measurement error at the measuring point is made up of the measurement error of
the device (0.5% o.r.) and the measurement error resulting from the installation
conditions on site. With a flow velocity > 0.3 m/s (1 ft/s) and a Reynolds number >
10 000, the following are typical error limits:
Nominal diameter Maximum permissible
errors for device
+ Installation-specific
maximum permissible
errors (typical)
→ Maximum permissible
errors at the
measuring point
(typical)
Field calibration
1)
DN 15 (½") ±0.5% o.r. ±
5 mm/s (0.20 in/s)
+ ±2.5% o.r. → ±3% o.r. ±
5 mm/s (0.20 in/s)
±0.5% o.r. ±
5 mm/s (0.20 in/s)
DN 25 to 200 (1 to 8") ±0.5% o.r. ±
7.5 mm/s (0.30 in/s)
+ ±1.5% o.r. → ±2% o.r. ±
7.5 mm/s (0.30 in/s)
±0.5% o.r. ±
7.5 mm/s (0.30 in/s)
> DN 200 (8") ±0.5% o.r. ±
3 mm/s (0.12 in/s)
+ ±1.5% o.r. → ±2% o.r. ±
3 mm/s (0.12 in/s)
±0.5% o.r. ±
3 mm/s (0.12 in/s)
1) Adjustment in relation to a reference value with correction values written back to the transmitter
Measurement report
If required, the device can be supplied with a factory measurement report. A measurement
is performed under reference conditions to verify the performance of the device. Here, the
sensors are mounted on a pipe with a nominal diameter of DN 50 (2") or DN 100 (4").
With a flow velocity of > 0.3 m/s (1 ft/s) and a Reynolds number > 10 000, the following
error limits are guaranteed with the measurement report:
Nominal diameter Maximum permissible errors for device
50 (2") ±0.5% o.r. ± 5 mm/s (0.20 in/s)
100 (4") ±0.5% o.r. ± 7.5 mm/s (0.30 in/s)
The specification applies to Reynolds numbers Re ≥ 10 000. Larger measurement
errors may occur for Reynolds numbers Re < 10 000.