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1. STOPS - Calibrates the valve travel by moving the valve to the fully closed and fully
opened positions. A find stops routine is required to be executed before the device will
function, and recommended if any changes to the valve, actuator, or mounting of the
SVI occur.
2. STOP OP - Allows for rescaling the full travel to a new open position if desired full
open stroke is less than actual full open stroke (as found by Find Stop). Use +/-
buttons to adjust.
3. TUNE - Automatically sets optimal tuning parameters for best performance of the
valve system. Valve must be isolated from the process. Task is interrupted when
using any button, returning the valve to starting position.
4. SIG LOW - Allows for rescaling the mA input signal / setpoint value (typically for split
ranged devices) for 0% position. Use +/- buttons to adjust.
5. SIG HIGH - Allows for rescaling the mA input signal / setpoint value (typically for split
ranged devices) for 100% position. Use +/- buttons to adjust.
4.3.10.1Calibrating Travel Range using Find Stops
To calibrate the SVI3 (see Figure 34 on page 63):
1. Observe the display following power-up. The SVI3 powers up in the previously active
mode either MANUAL or NORMAL (operating) mode:
• If in NORMAL mode
,
the display alternates between
POS
and
SIGNAL
indicating
Normal mode.
• If in MANUAL, the display alternates between
POS –M
and
SIG
indicating
MANUAL mode.
2. With
MANUAL
mode displayed, press * to select the
MANUAL
mode.
3. Press any key to enter
MANUAL
menu.
4. Press + to display
SETUP
.
5. Press * to enter
SETUP
mode.
6. In
SETUP
mode press * again;
CONFIG
appears. Pr again brings
CALI
B.
7. Select
CALIB
by pressing *.
STOPS
appears.
8. Press * to perform
FIND STOPS.
The valve moves full open and back to full closed.
9. Observe all warnings.
10. Press * and the valve strokes and automatically calibrates valve travel.
11. After the STOPS procedure finishes, press + twice until TUNE appears.
