EUTECH INSTRUMENTS ALPHA CON 500 2-WIRE TRANSMITTER Istruzioni per gli Interventi Scaricare il pdf (Pagina 33)

11.3 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

RELAY OFF

HYSTERESIS BAND

(DEFAULT = 0.5 pH)

FORWARD DIRECTION

REVERSE DIRECTION

SP1

SP2

RELAY ON

SP1 Set to LO

SP2 Set to HI

1 2 ... 28 29 30 31 32 33 34

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EUTECH INSTRUMENTS ALPHA CON 500 2-WIRE TRANSMITTER Istruzioni per gli Interventi Pagina 33