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13
Multi-Function Technology
®
Operation
Motion Parameter Variables Description
Adaptation OFF When the manual override button is depressed, and released, the actuator
will perform synchronization. The actuator will simply drive to the mechanical
zero position and return to its last control position.
ON – Manual The default setting for adaptation is “ON – Manual”.
When the ON-Manual setting is selected, adaptation is initiated by:
•
Pressing the manual override button once
(GM / AM / NM / LM).
• Clicking the CW/CCW switch twice (AF, NF, LF and TF).
When adaptation is selected, (On-Manual or Automatic) the actuator will drive
one full cycle to its mechanical end stops OR the valves mechanical seats.
Upon completion of this cycle the actuators working range (input, feedback and
running time) will be adapted to the actual mechanical angle of rotation.
ON – Automatic When the ON-Automatic setting is selected at every power-up the actuator
will automatically adapt to the mechanical angle of rotation. Also upon
pressing the manual override button or CW/CCW switch, adaptation is
initiated (See above).
Mechanical Relationship
Sound and
Running Time
All Actuators As the speed of the actuator increases, there is an increase in the sound
power level.
Torque and
Running Time
Original Spring Return (AF / NF / LF) Though the running time remains constant, at approximately the 100-second
range there is a loss in output torque. This is due to the association of
runtime to torque. To gain a faster running time there is a loss in torque.
SEE FIGURE B.
FIGURE B – Torque and Run Time
To
r
q
ue and Run Time, LF24-MFT U
S
TORQUE [in-lb]
150
R
unnin
g
time
[
s
]
26
35
75
100
100
%
tor
que
r
r
cu
r
v
e
NOTE: All new generation spring return and non-spring return actuators are torque independent of speed.
M40035 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.