Calibrating the primary signal can be done most easily with a variable current source. Calibrating the
secondary signal can be done most easily with a 1 - 5 voltage source or a variable current source with a
250 Ohm resistor across the A and B terminals in the SVI connection entry. Changing the value of the
resistor calls for re-calibration of the secondary signal, since the secondary signal sensor actually meas-
ures voltage across the resistor rather than current.
Calibrating pressure can be done most easily with a method of turning the air supply off. From the man-
ual mode select full open or full closed (whichever fills the actuator to supply pressure). Go to the signal
calibration page and start the pressure calibration procedure. Turn the air supply off to get the low value
and turn the air supply back on to get the high value.
After complete calibration from a page, click:
•
OK button to accept changes entered, download to SVI, and exit to manual mode.
•
Cancel button to discard changes entered and exit to manual mode.
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Note:
Finding valve stops (Auto Stop Limits and Manual Stop Limits), Auto Tune, Reset to
Factory and any of the signal calibrations in the Signal Cal. Page occur immediately
when they are performed and are saved even if the cancel button is clicked instead
of the OK button.
