CALIBRATION
CALIBRATION FOR PARTICULAR APPLICATION
4 - 3
Span Adjustment
Setting the span normally requires the alignment of the 100 per-
cent radial line of the cam with the center of the cam roller.
Use the following steps to adjust the span:
1. Depending on the nomenclature type, apply one of the follow-
ing input signals:
Types AV11/5
Apply 103.4 kPa (15.0 psig). The actuator should move to its
fully opened position.
Type AV12/6
Apply 186.2 kPa (27.0 psig). The actuator should move to its
fully opened position.
Type AV2
Apply 20 mA. The actuator should move to its fully opened
position.
2. To adjust the span, loosen the span adjustment screw (Fig.
4-1) using a -inch Allen wrench.
3. Slide the span adjustment assembly (Fig. 4-1) in the appropri-
ate direction until the actuator moves to align the 100% radial line
with the center of the cam roller (toward pilot valve increases span
of actuator).
4. Tighten the span adjustment screw.
CALIBRATION FOR PARTICULAR APPLICATION
The following positioner adjustments may be used to tailor the
operation of the actuator to meet application requirements.
Figure 4-2. Cam Roller Alignment
T00771A
CAM FOLLOWER ARM
CAM ROLLER
CAM
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