172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
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coefficient F. Parameters to be entered in pressure units, such as measurement input range,
target set value, and alarm set value, must be entered in the pressure units defined by the
valve coefficient F. If the pressure unit and the parameter do not match, the product will not
operate properly.
NOTE: To use a pressure unit other than the valve coefficient F (indicated on the valve
coefficient plate), refer to the "Converting valve coefficient" section to convert the valve
coefficient and change the valve coefficient F along with valve coefficients A, C, and E.
Converting valve coefficient
Valve coefficient value for MC-COS(R) and MC-VCOS(R) are indicated in the valve
coefficient plate (attached) on the MC-(V)COS(R), which is also indicated on the
valve coefficient tag when the equipment is new.
The value of the valve coefficient F indicates the unit of pressure used for control.
Values of other valve coefficients A to E vary depending on the unit system. When
control is performed with a pressure unit different from the value of F indicated in the
product, or the pressure unit used for control is changed, it is necessary to convert
the valve coefficient according to the pressure unit to be used.
Valve coefficients A, C and E need to be changed. The value obtained by multiplying
the current valve coefficient described in the valve coefficient plate by the correction
coefficient shown in Table 8-1-1, 8-1-2, 8-2-1, or 8-2-2 become the valve coefficient in
the new pressure unit system. It is not necessary to change the values of valve
coefficients b and d.
Refer to “Input 1_Valve coefficient F” and “Input 2_Valve coefficient F” for
pressure unit indicated by the value of Valve coefficient F.
Table 8-1-1 Correction factor of valve coefficient A and C
New unit
system
Current
unit system
kg/cm
2
G
(F=0)
barg
(F=1)
psig
(F=2)
kPaG
(F=3)
MPaG
(F=4)
kg/cm
2
G (F=0)
─
1.01970
0.70307
1.01970
1.01970
barg
(F=1)
0.98067
─
0.68948
1.00000
1.00000
psig
(F=2)
1.42230
1.45040
─
1.45040
1.45040
kPaG
(F=3)
0.98067
1.00000
0.68948
─
1.00000
MPaG
(F=4)
0.98067
1.00000
0.68948
1.00000
─
Table 8-1-2 Correction factor of valve coefficient A and C
New unit
system
Current
unit system
mmHg
(F=10)
mbar
(F=11)
inHg
(F=12)
psi
(F=13)
kPa
(F=14)
mmHg
(F=10)
─
0.75006
2.54000
0.51715
0.75006
mbar
(F=11)
1.33320
─
3.38600
0.68948
1.00000
inHg
(F=12)
0.39370
0.29530
─
0.20360
0.29530
psi
(F=13)
1.93370
1.45040
4.91200
─
1.45040
kPa
(F=14)
1.33320
1.00000
3.38600
0.68948
─
Table 8-2-1 Correction factor of valve coefficient E
New unit
system
Current
unit system
kg/cm
2
G
(F=0)
barg
(F=1)
psig
(F=2)
kPaG
(F=3)
MPaG
(F=4)
kg/cm
2
G (F=0)
─
0.98067
1.42230
0.98067
0.98067
Summary of Contents for SC-F71
Page 17: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 16 ...
Page 18: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 17 Differential temperature control ...
Page 114: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 113 Setting procedure ...
Page 131: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 130 Setting procedure ...
Page 134: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 133 Setting procedure ...
Page 141: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 140 Setting procedure ...
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Page 293: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 292 Checking PID values ...
Page 303: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 302 Setting procedure ...
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Page 347: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 346 Operating procedure ...
Page 388: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 387 Setting procedure ...