Installation
Proline Promag 55 FOUNDATION Fieldbus
18
Hauser
3.2.8
Nominal diameter and flow rate
The diameter of the pipe and the flow rate determine the nominal diameter of the sensor. The
optimum flow velocity is between 2 and 3 m/s (6 to 10 ft/s). The flow velocity (v), moreover, has
to be matched to the physical properties of the fluid:
• v < 2 m/s (<6 ft/s): for abrasive fluids where solids do not cause sedimentation (e.g. lime milk)
• v > 2 m/s (>6 ft/s): for fluids producing buildup (e.g. wastewater sludge)
• v > 2 m/s (>6 ft/s): for abrasive sludge with a high sand or stone content and where the solids
easily cause sedimentation (e.g. ore slurry)
!
Note!
Flow velocity can be increased, if necessary, by reducing the nominal diameter of the sensor through
the use of adapters
17.
Flow characteristic values for Promag S sensor (SI units)
Nominal
diameter
Recommended flow rate
Factory settings
[mm]
Min./max. full scale value
(v
≈
0.3 or 10 m/s)
Low flow cut off
(v
≈
0.04 m/s)
15
4 to 100 dm
3
/min
0.5 dm
3
/min
25
9 to 300 dm
3
/min
1 dm
3
/min
32
15 to 500 dm
3
/min
2 dm
3
/min
40
25 to 700 dm
3
/min
3 dm
3
/min
50
35 to 1100 dm
3
/min
5 dm
3
/min
65
60 to 2000 dm
3
/min
8 dm
3
/min
80
90 to 3000 dm
3
/min
12 dm
3
/min
100
145 to 4700 dm
3
/min
20 dm
3
/min
125
220 to 7500 dm
3
/min
30 dm
3
/min
150
20 to 600 m
3
/h
2.5 m
3
/h
200
35 to 1100 m
3
/h
5.0 m
3
/h
250
55 to 1700 m
3
/h
7.5 m
3
/h
300
80 to 2400 m
3
/h
10 m
3
/h
350
110 to 3300 m
3
/h
15 m
3
/h
400
140 to 4200 m
3
/h
20 m
3
/h
450
180 to 5400 m
3
/h
25 m
3
/h
500
220 to 6600 m
3
/h
30 m
3
/h
600
310 to 9600 m
3
/h
40 m
3
/h
