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Appenclix 3 – hysteresis band
Simple Explanation on the Function of Hysteresis Band
The controller relay activates when the set-point is reached. In the reverse direction, it closes.
Relay continues to be active till the value reaches the amount set by hysteresis band.
4.0
4.5
9.5
10.0
7.0
RELAY OFF
HYSTERESIS BAND
(DEFAULT = 0.5 pH)
FORWARD DIRECTION
REVERSE DIRECTION
SP1
SP2
RELAY ON
SP1 Set to LO
SP2 Set to HI
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