Siargo MF4000 - Analog Output (0.5 ~ 4.5 Vdc); Pressure Loss

www.Siargo.com MF / FS4000 User Manual 22 | P a g e
5.6 Analog output (0.5 ~ 4.5Vdc)
The product offers a voltage analog output of the instant flow rate. Refer to Table 3.1 for the wire
connection for this output. The meter is calibrated to 110% of the specified full-scale flow rate. The
typical analog output is indicated below. This over range applies to both analog and digital output.
Table 5.7: MF4o00 analog output
Figure 5.4: MF/FS4o00 analog output
5.7 Pressure loss
The product is designed for low-pressure loss. The major drop of the pressure is at the manual valve
structure. The following graph illustrated the pressure losses of the selected models.
Table 5.8: MF/FS4o08 pressure loss
Flow rate
(sccm)
Pressure loss
(Pa / PSI)
0.0
0 / o
5.0
8 / 0.001
10.0
25 / 0.004
20.0
90 / 0.013
30.0
200 / 0.029
40.0
370 / 0.054
50.0
580 / 0.084
Figure 5.5: MF/FS4008 pressure loss
Flow rate
Analog output
(Vdc)
0.00
0.50
10 % F.S.
0.90
20 % F.S.
1.30
40 % F.S.
2.10
50 % F.S.
2.50
70 % F.S.
3.30
90 % F.S.
4.10
100 % F.S.
4.50
110 % F.S.
4.90
120 % F.S.
4.90