Badger Meter SRD/SRI Valve Positioners - Manual (Page 43)

Travel Page
Travel limits can be set in the Travel page (Edit > Configuration) . Lower
and Upper Travel stops work just like mechanical stops—they define the
travel limits .
If the positioner is in analog mode, the limits can also be set using the
push button menu of the positioner’s PCB .
Response times, represented by the time constants for 0 to 100%
and 100 to 0% travel, are displayed in this page . Time constants are
determined only if the positioner is calibrated by Autostart .
Lower Travel Stop
Travel limits can be set in the Travel page (Edit > Configuration) . Lower and Upper Travel stops work just like mechanical
stops—they define the travel limits . This parameter defines the lower stop .
If the positioner is in analog mode, they can also be set using the push button menu of the positioner’s PCB . The 4-byte real
minimum has a default of 0% .
Upper Travel Stop
Travel limits can be set in the Travel page (Edit > Configuration) . Lower and Upper Travel stops work just like mechanical
stops—they define the travel limits . This parameter defines the upper stop .
If the positioner is in analog mode, they can also be set using the push button menu of the positioner’s PCB . The 4-byte real
maximum has a default of 100% .
Cutoff
Cutoff lets you specify at what point the valve can be completely closed . For example, when set at 2%, any input signal below
that will be treated as 0% . The amount of hysteresis allowed in the Cutoff is defined by the Cutoff hysteresis . Following the
above example with 2% Cutoff, 0 .5% Cutoff hysteresis allows the valve to close at 2% input signal, but it starts to re-open at
2 .5% . The default is 2% .
It is a 4-byte real, expressed as percentage .
Cutoff Deadband
Cutoff allows the user to specify at what point the valve can be completely closed . For example, when set at 2%, any input
signal below that will be treated as 0% . The amount of hysteresis allowed in the Cutoff is defined by the Cutoff deadband .
Following the above example with 2% Cutoff, 0 .5% Cutoff deadband will allow valve to close at 2% input signal, but it starts to
re-open at 2 .5% . Default is 2% .
It is a 4-byte real, expressed as percentage .
Travel Position Units
This byte-wide field is used for determining how the valve position is expressed . There are three options:
• mm (millimeters)
• in . (inches)
• ° degrees (the default)
NOTE: N The Degrees option represents the amount of rotation of the positioner spindle, which is also equal to valve rotation
for quarter-turn applications . If the calculations are in degrees, modification of Stroke is not possible . In the other two
cases, it is .
Configuration / Parameter
Page 43 August 2014 POS-UM-00011-EN-02