Bradley 233 - Operating Instructions; Installation; Pushbuttons; Rotary Switches

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SECTION

3

OPERATING

INSTRUCTIONS

3.1

INSTALLATION

1.

Check

that

the

rear

panel

voltage

selector

switch

is

set

correctly

for

the

supply

voltage.

2.

Fuse

ratings:

for

200/250V

operation

-

0.

5A

(supplied)

for

100/125V

operation

-

lA.

3.

Supply

connections

Brown

-

Line

Blue

-

Neutral

Green/yellow

-

Earth

3.2

PUSHBUTTONS

1.

The

legend

above

any

push-button

refers

to

the

function

obtained

when

the

button

is

in.

2.

Black

buttons

occur

in

interactive

groups,

and

normally

only

one

button

should

be

in.

3.

White

buttons

are

mechanically

independent,

and

the

legend

below

a

button

refers

to

the

function

obtained

when

the

button

is

out.

It

is

screened

in

yellow

as

a

reminder.

4.

The

red

button

has

a

spring-return

action.

3.3

ROTARY

SWITCHES

1.

On

all

time

switches

the

nomimal

value

of

the

switch

setting

is

obtained

when

the

small

concentric

vernier

control

is

fully

anti-clockwise

in

the

'CAL'

position.

When

the

vernier

is

turned

clockwise

the

time

increases

until

it

overlaps

the

next

greater

range

setting;

or

on

the

longest

range,

overlaps

a

value

ten

times

greater

than

the

range

setting.

2.

Stable

pulses

can

be

guaranteed

only

when

the

delay

and

width

monostables

are

not

"counting

down".

It

is

important,

therefore,

to

keep

both

delay

and

width

of

a

pulse

somewhat

less

than

the

period.

If

the

delay

is

not

required,

set

it

to

lOnsec.

3.

Jitter,

or

at

high

frequencies,

moding

can

be

caused

by

any

delay

or

width

monostables

counting

down.

It

is

good

practice

to

keep

all

unused

delay

or

width

contols

set

to

lOnsec.

4.

On

the

output

amplitude

controls

the

nominal

value

of

the

switch

setting

is

obtained

with

the

vernier

fully

clockwise

in

the

'CAL'

position.

The

vernier

reduces

the

amplitude

until

it

overlaps

the

next

smaller

range

setting,

or

on

the

lowest

range,

until

it

is

less

than

0.

5V.

3.4

FUNCTIONAL

DESCRIPTION

1.

A

Section

This

section

determines

the

pulse

rate

for

the

rest

of

the

unit.

On

"Free

Run"

and

"Ext

Gate"

the

rate

depends

on

the

settings

of

the

PERIOD

switch

and

vernier.

On