172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
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5.3 Correcting Input
PV bias can be used for Input correction. The PV bias is used to compensate the
individual variations of the sensors or correct the difference between the Measured
value (PV) of other instruments.
Description of function
●
PV bias
PV bias adds bias to the Measured value (PV).
Setting example of PV bias:
When measuring the same type of load by using different sensors, the Measured
value (PV) will be displayed differently based on the features of sensors:
SC-F71 [A]: 200
C
SC-F71 [B]: 198
C
To correct the Measure value (PV) of SC-F71 [B], add bias of
2
C by PV bias:
Displayed value
Measured value (PV)
PV bias
198
C
2
C
200
C
●
PV ratio
PV ratio is a multiplier to be applied to the Measured value (PV).
Setting example of PV ratio:
PV ratio can be used to display 200 °C by adding 2 °C when the actual Measured
value (PV) is 198 °C but the displayed value remains 0 °C when the actual PV is
0 °C. (The displayed value changes from 0 °C to 2 °C by PV bias setting.)
Displayed value
Measured value (PV)
PV ratio = 198
C
1.010 = 199.98
C
SC-F71
[A]
SC-F71
[B]
200 °C
198 °C
Sensor A
Sensor B
Load A
Load B
Summary of Contents for SC-F71
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Page 18: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 17 Differential temperature control ...
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Page 293: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 292 Checking PID values ...
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