32
YT-3400/3450 series
7.4
Auto Calibration (AUTO CAL)
Auto Calibration (AUTO CAL) automatically calibrates the positioner.
“AUTO CAL” process
takes about 2~3 minutes, and the duration of the process varies upon the size of the actuator.
There are 3 types of AUTO CAL.
Zero
Point
End Point
P, I, D
RA / DA
BIAS
V_0
AUTO 1
O
O
X
X
X
X
AUTO 2
O
O
O
O
O
O
AUTO HF
O
O
O
O
O
O
It is recommend to perform AUTO2 calibration for initial positioner setting.
7.4.1
AUTO1 Calibration (AUTO1)
AUTO1 changes only zero and end points; however other parameters(PID etc.) will not be
adjusted. It is recommended to perform AUTO1 when the positioner has been set by the
valve manufacturer already, and the field user wants to re-calibrate the positioner.
⇨
<ENTER>
6 seconds
⇨
<ENTER>
⇨
<ENTER>
