Flowserve 3400IQ Digital Positioner - Manual (Page 26)

Logix 3400IQ Digital Positioner FCD LGENIM3401-00 – 06/06
6
High-Friction Valves Placing the switch to the right optimizes the response for valves and actua-
tors with high friction levels. This setting slightly slows the response and will normally stop limit
cycling that can occur on high-friction valves.
7.4 Description of Cal DIP Switch Settings
The sixth DIP switch selects between two calibration options. The function of the Cal DIP switch is
described below.
NOTE: The unit must be in OOS mode before a calibration sequence can begin.
Auto Select Auto if the valve/actuator assembly has an internal stop in the open position. In Auto
mode the positioner will fully close the valve and register the 0% position and then open the valve to
the stop to register the 100% position when performing a self-calibration. See detailed instructions in
the next section on how to perform an auto positioner calibration.
Jog Select Jog if the valve/actuator assembly has no physical calibration stop in the open position.
In the Jog mode the positioner will fully close the valve for the 0% position and then wait for the user
to set the open position using the Jog buttons labeled with the up and down arrows. See the detailed
instructions in Section 7.6 on how to perform a manual calibration using the Jog buttons.
c WARNING: During the RE-CAL operation the valve may stroke unexpectedly. Notify
proper personnel that the valve will stroke, and make sure the valve is properly
isolated.
7.5 RE-CAL Operation
NOTE: The unit must be in OOS mode before a calibration sequence can begin.
The RE-CAL button is used to locally initiate a calibration of the positioner. Pressing and holding the
RE-CAL button for approximately three seconds will initiate the calibration. If the Config-Switches
option is enabled, the settings of all the configuration switches are read and the operation of the
positioner adjusted accordingly. A RE-CAL can be aborted at any time by briefly pressing the RE-CAL
button and the previous settings will be retained.
If the Quick Calibration switch (be careful not to confuse this with the RE-CAL button) is set to
Auto and the valve/actuator assembly has the necessary internal stops the calibration will complete
automatically. While the calibration is in progress you will notice a series of different lights flashing
indicating the calibration progress. When the lights return to a sequence that starts with a green light
the calibration is complete. An explanation of the various light sequences follows. The initial calibra-
tion of extremely large or small actuators may require several calibration attempts. The positioner
adapts to the actuator performance and begins each calibration where the last attempt ended. On an
initial installation it is recommended that after the first successful calibration that one more calibra-
tion be completed for optimum performance.