Samson 3730 Series - Valve Signature, Friction(X)

EB 8389-1S EN 33
Valve signature
4.4 Valve signature, friction(x)
The positioner calculates the friction during
closed-loop operation and compares it with
the friction determined when the reference
graph was plotted.
Data are recorded automatically 15 minutes
after initialization (regardless of the operat-
ing mode selected) if a reference graph has
already been plotted. Data logging does not
need to be activated.
Dening parameters
1. Record the reference graph. See u Sec-
tion 4.1.
2. Select classication for status messages.
See uSection 4.2.1.
2.
Device settings > Alarm settings > Status
classication > Valve
Change in friction
− Higher in total range: [
], , ,
− Lower in total range: [ ], , ,
− Higher in mid-position: [ ], , ,
− Lower in mid-position: [ ], , ,
− Higher near max. OPEN position:
[ ], , ,
− Lower near max. OPEN position:
[ ], , ,
− Higher near CLOSED position:
[ ], , ,
− Lower near CLOSED position:
[ ], , ,
Fig. 5: Diagnostics > Monitoring/tests > Valve signature > Valve signature, friction(x)