GE Masoneilan SVI II ESD Installation And Maintenance Manual page 209

Sig Hi
Sig Lo
Single Acting
Split Range
STOPS
Stroke
Tag
Tight Shutoff (TS)
ValVue ESD
VDE⁄VDI 3845
VIEW DATA
VIEW ERR
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In the SVI II ESD configuration, the input current setting at which a
valve is fully open (ATO) or fully closed (ATC).
In the SVI II ESD configuration, the input current setting at which a
valve is fully closed (ATO) or fully open (ATC).
The action of a positioner with a single pneumatic output to operate
with a spring return actuator.
A control configuration where a single control output is sent to two
or more control valves. Each control valve positioner is calibrated to
respond to a separate portion of the control signal. An example is a
steam valve and a cooling water valve arranged to be both closed at
50% and the steam valve to open.
SVI II ESD runs STOPS procedure to adjust the positioner to actual
valve travel. First, output pressure is reduced to zero and position is
recorded. That is the position corresponding to 0%. Then output
pressure is raised to its maximum based on supply pressure. The
position is recorded and corresponds to 100%.
The total range of valve travel. Often used as a verb to describe the
process of moving the valve.
The formal designator the control valve used in control loop docu-
mentation.
A positioner property that is selected and adjusted when it is desired
to prevent valve operation at or near the closed position. The posi-
tioner causes all available actuator force to be applied to the valve
seat at a position set point equal to or less than the TS adjustable
parameter. A dead band is applied to prevent cycling in and out of
this behavior.
GE's software for calibration, configuration, diagnostics, and PST
setup that is provided, on a trial basis with every SVI II ESD.
A standard common in Europe for mounting positioners and acces-
sories on rotary valve actuators.
A positioner mode of operation in which configuration and calibra-
tion parameters can been examined, either remotely or with local
display.
A positioner mode of operation in which the error status or error
messages can be examined.
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