-75-
No.PF
※※
-OMY0002
○Conversion formula of the process data and flow measurement value
(1) Conversion formula from the process data to the flow measurement value:
Pr = a × (PD) + b
(2) Conversion formula from the flow measurement value to the process data:
(PD) = (Pr
– b) / a
Pr: Flow measurement value and pressure set value
PD: Flow measurement value (process data)
a: Inclination
b: Intercept
[Inclination and intercept to the unit specification]
Series
Unit
Flow range
Inclination a
Intercept b
PFMC7
L/min
4 L
0.125
0
16 L
0.25
0
40 L
0.5
0
cfm
4 L
0.004415
0
16 L
0.0088275
0
40 L
0.0176575
0
[Calculation example]
(1) Conversion from the process data to the flow measurement value
(For PFMC7 series, unit L/min, flow range 1000 L and PD = 2500)
Pr = a × (PD) + b
= 0.25 × 2500 + 0
= 625 [L/min]
(2) Conversion from the flow measurement value to the process data
(For PFMC7 series, unit L/min, flow range 1000 L and Pr = 800 [L/min])
(PD) = (Pr - b) / a
= [800 - 0] / 0.25
= 3200
