Flowserve SoftTools Suite 7.0 - Manual (Page 12)

VLAUG001-00 ©Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611 12 of 21
To perform a current loop calibration, follow the directions in the calibration wizard:
1. Set the variable current source to the desired absolute 0% command signal
(usually 4 mA). Click the 0% level Accept button.
2. Set the variable current source to the desired minimum (usually 4 mA). If split-
ranged application, minimum may be different (e.g. 12 mA).
3. Set the variable current source to the desired 100% command signal (usually 20
mA). Click the 100% level Accept button.
NOTE: You must complete the entire procedure. The positioner is "offline" during
calibration and does not return to service until the procedure is complete.
Click on Calibrate Stroke to display the Calibrate Stroke window. The stroke calibration
procedure moves the valve to a closed position and then to an open position. The positioner
measures closure member position at the two points to ascertain each exact position,
thereby correctly calibrating the stroke position sensor.
Figure 9 Stroke calibration window
To perform a stroke calibration on a "double-acting" actuator:
WARNING! This procedure causes stroke movement to occur. Follow your company
guidelines to assure the safety of personnel and processes before proceeding.
1. Click on the Start button. The stroke calibration procedure is performed
automatically.
Note: You must complete the entire procedure. The positioner is "offline" during calibration
and does not return to service until the procedure is complete.