Badger Meter SRD/SRI Valve Positioners - Manual (Page 36)

OPTIONS
Limit Switch
Figure 17: Limit switch
TO AVOID ANY PERSONAL INJURY DO NOT TOUCH CONTROL
VANES DURING OPERATION.
Remove three screws A including tooth lock washer from
plastic cover
Attach limit indicator B so that the flattened shaft end 19
contacts the groove of the limit indicator shaft in the positioner
Attach limit indicator by means of three longer screws C
and washers
Test: the coupling shaft at back of positioner should easily be
turnable, thereby also moving the vanes of the limit indicator If
this is not the case, loosen screws C and flush-align the shafts of
positioner and limit switch (turn coupling shaft several times)
Replace short travel indicator 12 by long travel indicator
Screw high cover 28 (or standard cover with insert frame) on
housing
Figure 18: Switch functions
Switch Functions
Feedback lever, feedback shaft and the control vanes are all
connected to each other, without an intermediate transmission
The control vanes are therefore moving simultaneously with the
same angle rate as the feedback lever
The length of the control vane corresponds with the swing angle
of 120°
Both control vanes are located on different planes Each control
vane can be seen independently from the other, because each
has its own sensor
By adjusting the screws, the control vanes can be adjusted
relatively to the angle rate, so that, for example, one vane dives
into and another dives out of the sensor (see illustration)
Options
Page 36 August 2014 POS-UM-00010-EN-03