Span Adjustment; Calibration For Particular Application; Cam Roller Alignment - ABB AV1 Operating Instructions Manual

Span Adjustment

Types AV11/5
Type AV12/6
Type AV2

CALIBRATION FOR PARTICULAR APPLICATION

CAM
CAM FOLLOWER ARM
Figure 4-2. Cam Roller Alignment
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:
Apply 103.4 kPa (15.0 psig). The actuator should move to its
fully opened position.
Apply 186.2 kPa (27.0 psig). The actuator should move to its
fully opened position.
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
32
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.
The following positioner adjustments may be used to tailor the
operation of the actuator to meet application requirements.
CALIBRATION FOR PARTICULAR APPLICATION
CALIBRATION
CAM ROLLER
T00771A
4 - 3