Specifications

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PID The PID function allows the user to enter or change the PID settings of the positioner. This
function is most often used to fine tune the PID values obtained from the automatic calibra-
tion function (ACAL). This function will allow the user to optimize the dynamic response of
the positioner with respect to speed of response, overshoot and percent error by varying the
appropriate gain settings.The Proportional (PCAL) and Derivative (DCAL) gain settings
can be varied incrementally on a scale from 1-20. The Integral (ICAL) gain setting can be
varied incrementally on a scale from 1-5. The larger the number the higher the gain setting.
Snsr The sensor calibration is a self adjustment that sets the positoners Hall-Effect circuitry. This
is automatically done during the ACAL (Automatic Calibration) routine. The sensor cali-
bration also shows up under the MCAL menu. This calibration only needs to be performed
under the MCAL routine when the positioner is set-up on a new application and only if the
ACAL routine is not performed.
trnd The purpose of this function is to calibrate the positioner’s transducer. The transducer is
calibrated on all new positioners at the factory, therefor this procedure does not need to be
performed for a new positioner. Perform this calibration function only if a replacement trans-
ducer or electronic canister was installed in the positioner.
-mA- This routine calibrates the positioner’s electronics to recognizing input current. This is done
using 4.0 mA and 20.0 mA as reference points. If exactly 4.0 mA or 20.0 mA can not be
given as inputs, the user can adjust the positioners values to the input using the arrow but-
tons.
Xmr This routine calibrates the positioner’s transmitter. The transmitter calibration does not
require the user to change the input current, although it does require the user to be able to
read the transmitter’s value in mA. For each, the zero and span, the user is first prompted to
enter the value that the transmitter is presently at. This is done by using the up and down
arrow buttons. The user is then prompted to enter the desired transmitter output (typically
4.0 mA for zero and 20.0 mA for span). The positioner then calculates the difference
between the present and the desired output currents (for zero and span) and uses the dif-
ferential to adjust the transmitter accordingly.
Flow This function allows for the setting of the flow characteristic of the positioner (not to be con-
fused with the flow characteristic of the valve). The options are Lin (Linear), EP (Equal
Percentage) and Opn (Quick Opening). A Lin (Linear) positioner characteristic duplicates
the inherent characteristic of the valve and is the most often used setting.
Type This function configures the positioner for the type of valve. The options are rot
(Rotary) and lin (Linear). This setting needs to be done in order to configure the posi-
tioner to recognize the type of magnetic feedback being given to the positioner.
FLOP This function allows the user to configure the positioner to match the failure method of the
valve/actuator. The options are “off” or “on”. The “off” option is for fail closed applications
and the “on” option is for fail open application. When “off” is chosen the LCD will read 0%
at the zero (Lo Calibration) and 100% at the span (Hi Calibration). When “on” is chosen
the LCD will read 100% at the zero (Lo Calibration) and 0% at the span (Hi Calibration).