ABB AV2123000 Positioner User Manual

CALIBRATION
CAM
CAM ROLLER
CAM FOLLOWER ARM
T00771A
Figure 4-2. Cam Roller Alignment
Span Adjustment
Setting the span normally requires the alignment of the 100 percent
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 following
input signals:
Types AV11/5
Type AV12/6
Type AV2
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.
3
4-1) using a ⁄ 32 -inch Allen wrench.
3. Slide the span adjustment assembly (Fig. 4-1) in the appropriate
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.
CALIBRATION FOR PARTICULAR APPLICATION
4 - 3