Terminal Connection of Feedback Signal
1. Open cover by loosening the four M4 bolts on the positioner cover.
2. Loosen locking bolts of terminal plate.
3. Insert a cable through the cable connector in the
positioner.
4. Use a ring type cable terminal so that it does not come out.
5. Insert terminal bolts in terminal holes of cable and lock them with (+) terminal and
(-) terminals on the terminal plate. Tighten terminal bolts with 1.1 lbs-ft (15 kfgcm)
of torque.
6. Be sure not to change the polarity of the terminals.
Inner Terminal Connection to Ground
1. The ground is necessary for the safety of the positioner and system.
2. The ground terminals are inside the terminal in the center of the terminal plate,
and outside terminal beside outer cable entry. Use any ground terminal that is
available. Resistance must be less than 100 Ω.
3. For use with inside ground, open cover by loosening the four screws of positioner
cover.
4. In order to maintain the ground connection, use a ring type ground cable terminal
to prevent it from coming out.
S/E Button (SUP/EXT Buttons)
There are “SUP” and “EXT” buttons next to the LCD display of the Series 195 and
295 positioners. If the “SUP” button is pressed, air pressure will be supplied to the
actuator. If the “EXT” button is pressed, the air pressure will be exhausted from the
actuator. This function is used when diagnosing actuator operation.
Variable Orifice
Hunting can occur if the actuator volume is too small. In this case, adjust the
variable orifice using a (-) flathead screwdriver. Hunting is prevented by reducing
the flow rate of supply pressure transmitted to the actuator.
Auto Calibration and Basic Operations
Buttons Operations
Series 195 and 295 positioners perform various functions using four buttons. The
position of the buttons is shown below:
<Enter> : is used to go to the main menu, save adjusted parameter values, or
choose sub menus.
<Esc> : is used to return to previous menu.
<UP> : is used to move to another menu or change parameter values.
<DOWN> : 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 LDC
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, push <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 the 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.
Stopper
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 (%)
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 AUTO2 calibration rather than
AUTO1 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
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