Samson 4763 - Page 31

EB 8359-2 EN 31
Operating the positioner
Table 1: Range springs
Rated travel [mm] Min./max. travel [mm] Reference variable (input signal) Range spring
Standard travels for SAMSON valves with lever l (40 to 127mm in length)
15 7.5 to 15
100%
50%
1
2
30 14 to 32
100%
50%
2
3
60 30 to 70 100% 3
Further travel ranges with lever l and lever extension (40 to 200mm in length)
20 7.5 to 26
100%
50%
1
2
40 14 to 50
100%
50%
2
3
> 60 30 to 90 100% 3
Î In case of a zero shift (e.g. due to a sub-
sequent change in the restriction setting
or supply pressure), check the zero set-
ting and readjust it.
Î The adjustment range of the Xp restric-
tion is restricted by the pointer and stop
to one turn (Fig.13). Do not remove the
pointer.
Zul. Supply Alim.
5
[%
]
Xp
4
3
2
1
0
0 90° 180° 270° 360°
1,4 bar3 bar6 bar
90°
180°
270°
0°
Fig.13: Setting the Xp restriction
If the pointer has been removed by mistake,
a basic calibration can be performed as
follows:
1. Close the restriction until slight resistance
can be felt.
2. From this position, open the restriction
one ¼ turn.
3. Push on the plastic ring with pointer
pointing to the 0° position.
4. Set the restriction in the range between
90° and 180°.
5. Set Xp as described in section6.3.1.