Endress+Hauser Proline Promag 55 - Nominal diameter and flow rate

Installation Proline Promag 55 PROFIBUS DP/PA
18 Endress+Hauser
3.2.8 Nominal diameter and flow rate Promag S and Promag H
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  ä 17.
Flow rate characteristic values - Promag S (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…100 dm
3
/min 0.5 dm
3
/min
25 9…300 dm
3
/min 1 dm
3
/min
32 15…500 dm
3
/min 2 dm
3
/min
40 25…700 dm
3
/min 3 dm
3
/min
50 35…1100 dm
3
/min 5 dm
3
/min
65 60…2000 dm
3
/min 8 dm
3
/min
80 90…3000 dm
3
/min 12 dm
3
/min
100 145…4700 dm
3
/min 20 dm
3
/min
125 220…7500 dm
3
/min 30 dm
3
/min
150 20…600 m
3
/h 2.5 m
3
/h
200 35…1100 m
3
/h 5.0 m
3
/h
250 55…1700 m
3
/h 7.5 m
3
/h
300 80…2400 m
3
/h 10 m
3
/h
350 110…3300 m
3
/h 15 m
3
/h
400 140…4200 m
3
/h 20 m
3
/h
450 180…5400 m
3
/h 25 m
3
/h
500 220…6600 m
3
/h 30 m
3
/h
600 310…9600 m
3
/h 40 m
3
/h