Ppendix, Imple explanation on the function of hysteresis, Hysteresis band (default = 0.5 ph) – Thermo Fisher Scientific Alpha pH 2000D User Manual
Page 42
11.3
Appendix 3 – Simple explanation on the function of hysteresis
SP1 Set to LO
SP2 Set to HI
RELAY ON
RELAY OFF
4.5
9.5
10.0
4.0
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
.
HYSTERESIS BAND
(DEFAULT = 0.5 pH)
FORWARD DIRECTION
SP1
SP2
REVERSE DIRECTION
7.0
- 37 -
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