Omega CN4321, Руководство пользователя, Страница: 61 / 83

time, the controller averages out the peaks and valleys of
a dynamic system which, in turn, stabilizes the control.
The digital filter also aids in controlling processes where
the electrical noise is affecting the input signal. The larg-
er the value entered, the more filter added and the slow-
er the controller reacts to process variable changes. The
smaller the value entered, the less filter added and the
quicker the controller reacts to process variable
changes. Enter as small a value as possible that pro-
vides accurate and stable control.
Setting range: 0.0-900.0 secs
P-An Alarm Hysteresis: The Alarm Hysteresis is that area on
one side of the alarm setpoint where the output does not
change condition. That area or deadband is intended to
eliminate relay chatter at alarm setpoint with less wear
on the relay. With a wide Alarm Hysteresis, the controller
takes a longer time to change output condition. With a
narrow Alarm Hysteresis, the controller takes a shorter
time to change output condition. Enter a value which is
just large enough to eliminate relay chatter.
Setting Range: 0 to 50% of full scale, set in E.U.
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