Smart Positioner
SP740 Series
8. Auto Calibration & PCB Operation
8.1 Warning
after saparating valve and actuator in system completely.
8.2 Button Description
The positioner has four(4) buttons.
Fig 8-1 Button
<UP> & <DOWN> : It is used when m oving to another menu or changing a parameter value in a menu
<ENTER> : It is used when entering into main menu or sub menu, or designated parameter value
Before working auto calibration , make sure that they have not influence on overal process
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<ENTER> : It is used when entering into main menu or sub menu, or designated parameter value
<ESC> : It is used when returning from the current menu to a higher one step menu
After connecting power to the positioner, RUN PV mode shall be
appeared on positioner's LCD monitor after 10 seconds as
described picture. " RUN PV " stands for the current position
"50.0%" indicates that valve opening is 50%.
In "RUN" mode, theere are 7 kinds of type which can be indicated as follows.
1. RUN PV (%) : Process Value - valve stroke. %
2. RUN SV (%) : Set Valve - input signal, 0~100%
3. RUN SV (mA) : Set Valve - input signal, 4~20mA DC
4. RUN VEL : Velocity - current valve stem's velocity.
5. RUN ERR : Error - difference between SV and PV
6. RUN PV : Current Position's resistance value
7. RUN MV : Torque Motor's digital control value
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