Calibration Procedures; Motor Speed Adjustment (Av4 Only - ABB AV3 Instruction Manual

AV3
Calibration
Adjustment
Zero 1. Turn on supply air. Apply a 4 mA
input signal to the positioner. The
actuator should be in the closed posi-
tion.
2. Loosen the zero adjustment set-
screw (Fig. B-9) using a
Allen wrench.
3. Turn the zero adjustment nut
(clockwise to increase) until the 0
radial line on the cam intersects with
the center of the cam roller (Fig. B-4).
4. Tighten the zero adjustment set-
screw.
Span 1. Apply 20 mA to the positioner. The
actuator should be in its full open
position.
2. Loosen the span adjustment screw
(Fig. B-9) using a
wrench.
3. Slide the span adjustment assem-
bly in the (Fig. B-9) appropriate direc-
tion (toward cam to increase) in order
to align the 100% radial line with the
center of the cam roller.
4. Tighten the span adjustment
screw.
Table B-2. Calibration Procedures
Procedure
Adjustment
⁄
3 32
-inch
⁄
3 -inch Allen
32
Table B-3. Motor Speed Adjustment (AV4 Only)
Adjustment
Motor Speed 1. Set the coarse adjustment potentiometer, located on the
EMI/electronics housing, to position 1.
2. Set the fine adjustment to the fastest speed (fully clock-
wise) (Fig. B-10).
3. Apply pulse inputs until the actuator reaches 0%.
4. Using a stopwatch measure the time it takes the actuator
to reach 100% by applying a constant increase signal.
5. Having obtained an actuator speed value in Step 4, use
Table B-4
which encompasses the actuator speed.
6. AV4 calibration is complete.
AV4
Calibration
Zero 1. Turn on supply air. Pulse the posi-
tioner in order to arrive at the mini-
mum (closed) position.
2. Loosen the zero adjustment set-
screw (Fig. B-9) using a
Allen wrench.
3. Turn the zero adjustment nut
(clockwise to increase) until the radial
line on the cam intersects with the
center of the cam roller (Fig. B-4).
4. Tighten the zero adjustment set-
screw.
Span 1. Pulse the Raise (TB1-4) terminal
until the actuator is in the full open
position.
2. Loosen the span adjustment screw
(Fig. B-9) using a
wrench.
3. Slide the span adjustment assem-
bly in the (Fig. B-9) appropriate direc-
tion (toward cam to increase) in order
to align the 100% radial line with the
center of the cam roller.
4. Tighten the span adjustment
screw. Refer to Table
speed adjustment information.
AV4 Calibration
Procedure
to determine the coarse speed adjustment setting
QUICK START
Procedure
⁄
3 32
-inch
⁄
3 -inch Allen
32
B-3 for motor
CALIBRATION
B - 9