
Instruction Manual alpha-pH 1000
36
12.3 Appendix 3
Simple Explanation on the Function of Hysteresis
The controller relay activates when the set-point is reached. In the reverse direction, it does not de-activate
when the value reaches the set-point. Instead, it continues to be active till the value reaches the amount set by
the Hysteresis band.
4.0 4.5 9.5 10.0
7.0
REL
YOFF
HYSTERESIS B
ND
(DEF
ULT = 0.5 pH)
FORWARD DIRECTION
REVERSE DIRECTION
SP1
SP2
REL
YON
SP1 Set to LO
SP2 Set to HI
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