Technical Specifications

581
Calibrate Tab
Calibrate Tab
From the Calibrate tab you can calibrate the stop positions and the feedback control
parameters.
Figure 10 Calibrate Tab
Fields
Signal- Low/High The low and high signal defines at what input values the valve will
be fully open or fully closed. The low signal value must always be
lower than the high signal value. The AMS Snap-on software identi-
fies which value represents closed and which represents open
from the configuration data.
The values are typically 4 and 20 mA but may be any values
between 3.8 and 22 mA. lithe valve is split ranged, values of 4 and
12 or 12 and 20 may be entered for example. These entries are the
proper method of split ranging the SVI (rather than with a custom
characterization curve).
P Proportional gain P(%) is the ratio of proportional action (part of
controller output) to error. Common values for the positioner are 50
for small valves, up to 4000 for large valves.