SMC Networks ZSE20B-L Operation Manual page 66

○Conversion formula of the process data and pressure gauge measurement value
(1) Conversion formula from the process data to the pressure gauge measurement value:
Pr = a × (PD) + b
(2) Conversion formula from the pressure gauge measurement value to the process data:
(PD) = (Pr – b) / a
Pr: Pressure gauge measurement value and pressure set value
PD: Pressure gauge measurement value
a: Inclination
b: Intercept
[Inclination and intercept to the unit specification]
Series
ISE20B
ZSE20B
ZSE20BF
[Calculation example]
(1) Conversion from the process data to the pressure measurement value
(For ISE20B series, unit specification MPa and PD = 2000)
Pr = a × (PD) + b
= 0.00025 × 2000 - 0.25
= 0.25 [MPa]
(2) Conversion from the pressure measurement value to the process data
(For ISE20B series, unit specification MPa and Pr = 0.75 [MPa])
(PD) = (Pr – b) / a
= [0.75 – (–0.25)]/0.00025
= 4000
Unit Inclination a
MPa 0.00025
kPa 0.25
2
kgf/cm 0.00254925
bar 0.0025
psi 0.03626
MPa -0.000025
kPa -0.025
2
kgf/cm -0.000254925
bar -0.00025
psi -0.003626
inchHg -0.0073825
mmHg -0.187525
MPa 0.00005
kPa 0.05
2
kgf/cm 0.00050985
bar 0.0005
psi 0.007252
inchHg 0.014765
mmHg 0.37505
Intercept b
-0.25
-250
-2.54925
-2.5
-36.26
0.025
25
0.254925
0.25
3.626
7.3825
187.525
-0.15
-150
-1.52955
-1.5
-21.756
-44.295
-1125.15
-65-
No.PS※※-OMV0006-D