1.5 mm (1/16”)
1.5 mm (1/16”)
page 7
AVID SmartCal valve positioner
Installation & operating instructions
Magnet assembly
SmartCal assembly
housing
Centerline of
magnetic pick-up unit
(position sensor)
Actuator split block
(at lower limit of
travel)
Actuator
centerline
Actuator split block
(at upper limit of travel)
Stroke/2
Stroke/2
Full
stroke
Upper
limit
of
travel
Location
of
centerline
Lower
limit
of
travel
Actuator yoke
Actuator split block
Magnet assembly
Mounting bracket
Magnetic pick-up unit
(position sensor)
SmartCal assembly
2.4 Mounting positioner on a linear
actuator
Step 1. Mount the magnet assembly to the
stem of the actuator. A coupler block normally
is needed to extend the magnet assembly
outside the yoke area and into the sensing
range of the magnetic pick-up unit.
Step 2. Fasten the mounting bracket to the
actuator.
Step 3. Mount the positioner to the mounting
bracket. The positioner should be mounted so
the magnetic pick-up unit of the positioner is
centered between the limits of the magnetic
assembly’s stroke. After mounting the
positioner, the magnet assembly should
be within 3 mm (1/8”) from the back of
the positioner (1.5 mm (1/16”) is ideal),
(See Figure 2-4 A)
Note
For Fisher actuators model 657 & 667 sizes 34
thru 70,
can supply a slotted
mounting kit design. This will allow the user
to easily center the positioner sensor between
the limits of the magnet assembly’s stroke.
Figure 2-4 A
