Badger Meter SRD/SRI Valve Positioners - Manual (Page 31)

Stem Setpoint
This value shows the stem setpoint in percent . The Stem setpoint is identical to the Setpoint unless a characteristic curve
other than linear (default) is selected . This setpoint represents the characteristics of the curve, such as equal-percentage,
invers-equal-percentage or custom .
Air Supply Pressure Reading
This measurement displays the current value of the air supply pressure, if the optional pressure sensors are available .
Output Pressure Reading
This measurement displays the current value of the output pressure, if the optional pressure sensors are available .
Control Difference
This measurement indicates the difference between the setpoint and actual valve position in percent . The calculation is done
by the Control Processor .
The maximum allowed value for the Control Difference is a variable, which can be configured under Alarms to define an alarm
threshold . If this error exceeds the Control Difference Limit (%) for more than a specified time in seconds (Control Difference
Time), then an alarm will be triggered .
Travel Position
The travel position shows the valve position in the units (mm, inch or degrees) selected under the Travel page .
Internal Electronics Temperature
This value represents the temperature in degrees ° C or ° F, detected on the electronic board . If the internal temperature of the
positioner is outside the Upper- and Lower-Temperature Limits displayed in the alarm page, an alarm will be triggered .
OPERATING THE POSITIONER OUTSIDE THESE LIMITS MAY CAUSE PERMANENT DAMAGE AND VIOLATE HAZARDOUS
SAFETY CONDITIONS.
Measured Value
Page 31 August 2014 POS-UM-00011-EN-02