Burkert 8694 - Cutoff; Sealing Function for the Positioner

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Operation and function
16.1.2 CUTOFF -
Sealing function for the positioner
This function causes the valve to be sealed outside the control range.
Control mode resumes at a hysteresis of 1%.
Factory setting: DIP switch 2 set to OFF (no sealing function)
DIP Switches Position Function
2 ON Sealing function active. The valve completely closes below
2%
29)
and opens above 98 % of the set-point value (CUTOFF)
OFF No sealing function
Table 32: DIP switch 2
The communications software can be used to change the limits for the position set-point value as a
percentage.
TheswitchingpositionoftheDIPswitchesinthepositionerhaspriorityoverthecommunications
software,i.e.settingsofthesealingfunction(CUTOFF)whicharemodiedwiththecommunica-
tionssoftwareareonlyactiveifDIPswitch2inthepositionerissettoON.
Valve stroke [%]
Adjustable from 75 – 100 %
Set-point
value [%]
Adjustable from 0 – 25 %
Figure 48: CUTOFF graph
29) Factory setting can be changed with communications software.
english
Type 8694 REV.2