Technical Specifications

639
Diagnostics Tab
Diagnostics Tab
Use the Diagnostic tab to run response time tests, step response tests, actuator signatures,
and positioner signatures. The continuous diagnostics appear each time the tab is opened.
Figure 9 Diagnostics Tab
Continuou
s Diagnostic
Values : Strokes, Cycles,
Time Open, Time Closed,
Time Near Closed
Displays the continuous diagnostic data including number
of full
strokes the valve has made, the number
of cycles (direction
changes), the time the
valve has spent open, the time the valve
has been closed, and the time the valve has spent throttling near
the seat.
Diagnostic Tests
Diagnostic
Types :
Response Test, Step Test,
Positioner Sig.
The SVI2 allows four diagnostic tests to be performed: Response
Time Test (with Actuator Signature), Step Response Test, Positioner
Signature Test, and Extended Actuator Signature test. The test to be
performed is selected in this selection box.
Diagnostic Parameters:
Start Position, Stop Posi-
tion, Time, Step Size
The parameters needed by the diagnostic tests are dependent
upon which test is selected: