Logix™ 3800zb Digital Positioner FCD AIIOM001030_EN 02/23
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9 OPERATION – CALIBRATION
AND CONTROL
9.1 Quick-Cal Calibration
The QUICK-CAL button is used to initiate an automatic
stroke calibration. This stroke calibration determines the
closed (0%) and open (100%) positions of the valve and
gathers information about the response of the valve to
determine the gains. The gains are automatically set. After a
stroke calibration, the positioner is ready to control.
To perform a QUICK-CAL, press and hold the QUICK-CAL
button for approximately 3 seconds.
While the automatic calibration is in progress, the LED lights
will flash Y-R-Y-G (yellow-red-yellow-green) status codes
indicating the calibration progress.
NOTE: This first time the QUICK-CAL is performed, the
positioner will also complete a Full Calibration. This will extend
the time required for the calibration. This happens with
Standard and Pro diagnostic levels.
9.2 Jog Calibration
If the valve/actuator assembly has no internal mechanical stop
at the fully open position, set the Jog Calibration Switch (DIP
5) to Cal Jog. In this case, press and hold the QUICK-CAL
button for approximately 3 seconds.
This process initiates the jog stroke calibration. The positioner
will then close the valve and set the zero position. The zero
position is automatically always set at the valve seat. At this
point, the LED‘s will flash in a sequence of Y-R-Y-G (yellow-
red-yellow-green) which indicates that the user must use the
jog keys to position the valve to approximately 100% manually.
Use the button and button to position the valve at
approximately 100% open.
Press the ACCEPT/QUICK-CAL button to proceed.
Once complete, there are no more required user actions
during calibration. The calibration is complete when the lights
return to a sequence that starts with a green light.
The jog calibration process will only allow the user to set the
span. If an elevated zero is needed, a handheld or ValveSight
DTM are required.
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