G) Customizing Set-points (CH 1 Switch)
• This function is used when the user wants to set
different set-points for fully open and fully closed
positions.
• For example, if the user wants to assign 5mA as
the set-point for the fully closed position, first of all
switch- on (move up) the CH1 switch (switch 4).
Supply a 5mA signal and push the ZERO button
once. Hereafter, the actuator will acknowledge the
5mA signal as the set-point for the fully closed
position and transmits a 4mA feedback signal.
Similarly, for setting the set-point for the fully open
position, supply the desired signal (for example,
19mA) and push the SPAN button once. Switch-
off (move down) the CH1 switch to complete the
setting. After this action, the actuator will operate
according this new setting.
H) Reversal Acting (CH 2 Switch)
• This function allows the user to reverse the input
and output signals for the operation of the actuator.
• For standard operation (CH 2 switch down), the
input signal of 4mA operates the actuator to the fully
closed position and the actuator transmits the output
signal of 4mA. However, if the CH 2 switch is on (
up) the input signal of 4mA operates the actuator to
the fully open position and still transmits a 4mA
output signal.
• Manually move the actuator to the half-open
position and push the ASCAN button once to
execute the Auto Setting (see 4.10.2 E). Supply
signal and check the operation.
I) Deadtime
• The actuator will only start to move if the change of
the input signal value is greater than the deadband
set value (see 4.10.2 J) and when the signal value
is maintained for the duration of the deadtime time.
• This prevents malfunction of the actuator caused
by unwanted signals in the input signal such as
noise and interferences.
• Turning the Delay Time Dial in clockwise
direction will increase the deadtime time (Range
0.05 to 7.5 seconds).
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