5
User’s Guide 2018
Application Guidelines
The minimum flow velocity through the SAFMAG ACP magmeter at full scale (i.e. 20mA),
should not be less than 1 metre/second. The meter diameter should therefore be selected
accordingly.
The SAFMAG ACP electromagnetic flowmeter has a minimum full-scale velocity of 1
metre/second and a maximum full-scale velocity of 10 metres/second. Velocity is calculated
from volumetric flowrate by using the following equation:
V =
1273.24 Q/D
2
Where: Q is the flowrate in litres/sec
D is the nominal meter size in mm
The table below gives meter capacities for minimum and maximum full scale velocities, for all
meter sizes
Flow Rate Guide
PIPE
SIZE
PIPE
SIZE
FLOWRATE @ 1m/s (3ft/s )
FLOWRATE @ 10m/s (30ft/s)
(mm)
(INCH)
(l/s)
m3/hr
ft3/s
gal(US)/s
(l/s)
m3/hr
ft3/s
gal(US)/s
40
1.6
1.25
4.5
0.04
0.33
12.5
45
0.44
3.30
50
2
2
7.2
0.07
0.53
20
72
0.71
5.28
65
2.6
3.3
11.9
0.12
0.87
33
118.8
1.17
8.72
80
3.2
5
18.0
0.18
1.32
50
180
1.77
13.2
100
4
8
28.8
0.28
2.11
80
288
2.83
21.1
125
5
12
43.2
0.42
3.17
120
432
4.24
31.7
150
6
18
64.8
0.64
4.75
180
648
6.36
47.5
200
8
31
111.6
1.09
8.19
310
1116
10.95
81.9
250
10
49
176.4
1.73
12.9
490
1764
17.30
129.4
300
12
70
252.0
2.47
18.5
700
2520
24.72
184.9
350
14
96
345.6
3.39
25.4
960
3456
33.90
253.5
400
16
125
450.0
4.41
33.0
1250
4500
44.14
330.1
450
18
159
572.4
5.62
42.0
1590
5724
56.15
419.9
500
20
196
705.6
6.92
51.8
1960
7056
69.22
517.6
600
24
283
1018.8
9.99
74.7
2830
10188
99.94
747.4
700
28
385
1386.0
13.60
101.7
3850
13860
135.96
1016.8
750
30
442
1591.2
15.61
116.7
4420
15912
156.09
1167.3
800
32
500
1800.0
17.66
132.1
5000
18000
176.57
1320.5
