Auto Calibration and Basic Operations
Buttons Operations
Series 185 and 285 positioners perform various functions using four buttons. The
position of the buttons is shown below:
<Enter> : It is used to go to the main menu, save adjusted parameter values, or
choose sub menus.
<Esc> : It is used to return to previous menu.
<UP> : It is used to move to another menu or change parameter values.
<DOWN> : It is used to move to another menu or change parameter values.
RUN mode
After connecting the power to the positioner, the following is displayed on the
LCD in 6 seconds.
RUN on the bottom line means that the Smart Positioner adjusts valve stroke
based on an outside signal (4 to 20 mA) and PV refers to the number on the
LCD. In RUN mode, valve stroke is changed according to input signal.
There are six options in RUN mode. In order to change display <ESC> and <UP>
at the same time. When the buttons are pushed, display order is changed. If the
<ESC> and <DOWN> buttons are pushed simultaneously, the order is opposite
and if <ESC> is pushed only, display returns to RUN mode.
First Auto Calibration
First auto calibration is usually used when the positioner has not been set, such
as the initial setting with valve at the valve company, or replacement with other
product in the field. In this case, all parameters are set by using AUTO2
calibration.
1. Connect power. Any values between 4 to 20 mA (DC) can be used for power.
After connecting power, ‘READY 3, 2, 1’ message appears on the LDC, which
means preparing to operate PCB circuit and parts. The following message is
displayed in 6 seconds. Push <ENTER> for 6 seconds at RUN mode, and AUTO
CAL message should appear.
2. Push <ENTER> and then AUTO1 mode is started.
3. Push <DOWN> and AUTO2 mode is displayed.
4. Push <ENTER> at AUTO2 mode. Auto 2 calibration is started and the next
modes are displayed in order on the LCD. Normally it will take 3 to 5 minutes for
auto calibration in AUTO2 mode, but it can be different based on actuator’s
volume.
5. When Auto calibration is done, ‘COMPLETE’ message appears on the LCD.
After 4 seconds the procedure is returned to RUN mode and the valve stroke by
current input signal is displayed as a percentage.
6. Zero, Span, PID parameters and RA/DA are automatically set when AUTO2
calibration is completed.
Below: Entire Modes and Functions
Auto Calibration (AUTO CAL)
The calibration of the positioner is simply performed by auto calibration. There are
3 types of auto calibration: AUTO1, AUTO2 and AUTO3.
AUTO1 calibration is useful for users in the field. AUTO2 calibration is for valve
companies or the initial parameter setting for the positioner.
It takes about 2-3 minutes for Auto calibration and it can be different based on the
actuator's volume. AUTO2 and AUTO3 calibration set the RA/DA automatically.
Auto Calibration Types
Auto 1 Calibration (AUTO1)
In this mode, all parameters necessary for valve operation are set except KP, KI,
KD and RA/DA. It is used to re-execute calibration by users in the field after being
supplied the positioner unit, whose parameters were set by the valve company.
1. Push <ENTER> for 6 seconds in RUN mode and AUTO CAL message should
appear.
2. Push <ENTER> and then AUTO1 mode is displayed.
3. Push <ENTER> again at AUTO1 mode and Auto 1 calibration is started.
4. When Auto 1 calibration is done, ‘COMPLETE’ message appears on the LCD.
After 4 seconds the procedure returns to RUN mode and the valve stroke by
current input signal is displayed as a percentage.
Auto 2 Calibration (AUTO2)
All parameters necessary to operate valve are set. This calibration is used when
the positioner is first installed with valve. Refer back to First Auto Calibration.
Auto 3 Calibration (AUTO3)
All parameters necessary to operate valve are set except zero and end point.
This function is used to re-execute auto calibration without changing the zero and
end point after adjusting them manually.
1. Push <DOWN> at AUTO2 and AUTO3 is displayed.
2. Push <ENTER> and AUTO3 calibration is started. The remaining procedures
of this calibration are the same as other calibrations.
Manual Mode
Manual mode is used to raise or lower the valve stem manually. In this mode,
valve stroke is adjusted only by operating buttons, not by the current input signal.
This mode does not affect controlling data registered in the positioner. It only is
used to move the valve stem up and down.
1. Push <ENTER> at RUN mode until AUTO CAL message is displayed.
2. Push <DOWN> and MANUAL mode is displayed.
3. Push <ENTER> again. Two lines appear on the LCD. The upper line indicates
valve stroke by percentage, and the lower line indicates absolute value of inner
resistance of the positioner. “MA” means that manual mode is in operation.
4. Push <UP> or <DOWN> and the valve stem moves up or down. Regardless of
RA/DA, if <UP> is pushed, the valve stem moves up (in case of linear valve). If
<DOWN> is pushed, the valve stem moves down. In order to make the valve
stem move fast, push <ENTER> with <UP>, or <DOWN>.
5. Push <ESC> and MANUAL mode is displayed.
Button
<ENTER>
<ESC>
<UP> & <DOWN>
Functions
Enter to Main Menu and Sub-Menus, Save Adjusted
Parameter Values, etc.
Return to Previous Menu
Move to Next Menu, Change Parameter Values, etc.
1
2
3
4
5
6
Run PV
Run SV %
Run SV mA
Run MV
Run Vel
Run Err
Process Value
Set Value
Set Value
Manipulate Value
Velocity
Error
Valve Stroke (%)
Input Signal (0 to 100%)
Input Signal (4 to 20 mA)
Motor/Piezo Valve Manipulate Value (Digit)
Current Value Stem’s Velocity (Digit)
Difference Between SV and PV (%)
AUTO1
AUTO2
AUTO3
Zero Point
o
o
x
End Point
o
o
x
KP, KI, KD
x
o
o
RA/DA
x
o
o
<UP> only
<UP>+<ENTER>
<DOWN> only
<DOWN>+<ENTER>
Increase stem value slowly
Increase stem value quickly
Decrease stem value slowly
Decrease stem value quickly
Since this makes the valve or actuator move, before auto
calibration, the valve must be separated from the entire
system.
CAUTION
When the positioner is installed on the valve in the field after
setting, we recommend using AUTO1 calibration rather than
AUTO2 calibration. This is because the valve company sets optimum parameters
so it is better that those registered parameters are not changed by AUTO1
calibration.
CAUTION
