TELEVAC CC-10 - 4.4 Set Point

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CC-10

INSTRUMENT MANUAL

Phone:(215) 947-2500 fax:(215) 947-7464 e-mail:sales@televac.com web site:www.televac.com

CC-10 MANUAL REV D

Page 10 of 40

Y

TELEVA

4.4

Set

Point

General

Description

– There

are

3

set

points

in

this

instrument

and

each

set

point

has

hysteresis

characteristics

and consists

of

two

set

values;

upper

threshold

and

lower

threshold.

In

this

manual

the

upper threshold

value

of

the

set

point

1

is

expressed

as

SP1H

and

lower

threshold

as

SP1L.

LED‟s

on

the

front

panel

displays

the

status

of

each

set

point.

They

lit

when

the

pressure

reaches

at

the lower

threshold

and

at

the

same

time

set

point

relays

activate.

If

the

pressure

rises

again

and exceeds

upper

threshold

the

LED‟s

go

off

and

the

relays

deactivate.

The

both

threshold

value

of each

3

set

point

can

be

set

independently.

Set

value

of

set

points

Upper

threshold

of

each

set

point

(SP1H-SP3H)

cannot

be

set

below

the

lower

threshold

value

(SP1L-SP3L).

If

it

does

not

meet

this

condition

the

upper

and

the

lower

threshold

become

the same

value.

Hysteresis The

hysteresis

characteristic

is

installed

to

prevent

chattering

of

the

relays.

Therefore,

there

are some

response

differences

near

the

set

point.

Pressure

Hysteresis

Setpoint Status

SP1L

(Lower Threshold)

SP1H

(Upper Threshold)

ON

OFF

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