AUX E&H Series Instrukcje Operacyjne Pobierz pdf (Strona 43)

Control characteristic for direct and inverted control action

Field R236 offers two control characteristics for selection which have the effects shown in the

following diagram.

5.6.3 Timer for cleaning function

This function can be used to implement a

simple cleaning routine. The user can specify

a time interval after which cleaning is to start;

i.e. only constant intervals can be defined.

More extended cleaning functions can be

implemented in conjunction with the

ChemoClean function (version with four

contacts, see chapter 5.5.4).

Note:

The timer and ChemoClean do not

work independently of each other.

Whilst one of the functions is active,

the other cannot be started.

– X

100 %

direct =

max. function

inverted =

min. function

REGEL03.CDR

Fig. 5.13

Control characteristic of a

proportional-action

controller with direct and

inverted control action

Wiper and / or spray cleaning

system

active

inactive

Hold function

active

inactive

Cleaning time

(0 ... 999 s)

Pause time between

2 cleaning intervals

(1 ... 7200 min)

Clean-Hold

dwell period

(0 ... 999 s)

Time

DIAGR-TI.CDR

Fig. 5.14

Relationship among

cleaning time, pause time

and hold dwell period

PM253E5B.CHP

Liquisys M CPM 223 / 253 Instrument configuration

Endress+Hauser 41

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 91 92

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