Eberline ESP-1 - Page 32

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f.

(3)

In

Inquiry/Calibration

Mode:

The

+

switch

has

two

functions.

Used

alone,

it

causes

display

of

the

next

parameter

in

the

list

of

parameters.

Used

simultaneously

with

RESET,

it

allows

the

operator

to

increase

the

value

of

the

selected

parameter.

CAUTION

External

keypad

controls

allow

monitoring

and

calibration

of

the

high

voltage

display,

but

do

not

allow

setting

(or

changing)

the

actual

high

voltage.

Do

not

attempt

to

change

the

high

voltage

by

pressing

RESET

+

or

RESET

-.

Refer

to

the

"Operator

Controls"

section

for

a

description

of

the

internal

potentiometer

used

to

vary

the

actual

high

voltage.

-:

The

functions

of

the

"-"

switch

depend

on

the

operating

mode.

(1)

In

Rate

Meter

Mode:

If

the

slow

response

time

is

being

used,

pressing

the

-

switch

will

override

the

one

minute

delay

and

will

immediately

place

the

ESP-1

back

in

the

fast

response

time.

(2)

In

Scaler

Mode:

The

"-"

switch

is

used

to

provide

the

operator

access

to

the

list

of

parameters.

When

used

simultaneously

with

RESET,

"-"

decreases

the

count

interval

or

alarm

set

point.

(3)

In

Inquiry/Calibration

Mode:

The

-

switch

has

two

functions.

Used

alone,

it

causes

display

of

the

preceding

parameter

in

the

list

of

parameters.

Used

simultaneously

with

RESET,

it

allows

the

operator

to

decrease

the

value

of

the

selected

parameter.

SPKR:

Pressing

the

SPKR

switch

turns

the

speaker

on

or

off.

It

also

tums

off

the

alarm

when

it

sounds.

When

SPKR

is

used

to

silence

the

alarm,

the

speaker

remains

on

until

the

operator

presses

SPKR

again.

2.

Operator

Controls

-

Internal

(figure

3-1)

Removing

the

right

side

door

will

provide

access

to

the

following:

a.

LV:

This

potentiometer

adjusts

the

operating

voltage

for

the

instrument.

It

is

set

for

5.00V.

b.

D:

This

potentiometer

is

the

discriminator

adjustment.

It

is

set

to

an

optimum

input

sensitivity

for the

detector

being

used.

(See

section

V.)

c.

НУ:

This

potentiometer

adjusts

the

high

voltage

(detector

bias).

It

is

set

to

the

optimum

operating

voltage

for

the

detector

being

used

(see

section

V).

High

voltage

is

continuously

variable

from

350

to

2300

V.

Tum

the

potentiometer

clockwise

to

increase

the

high

voltage

and

counterclockwise

to

decrease

it.

The

value

of

the

high

voltage

being

output

to

the

detector

is

displayed

as

the

"HV="

parameter

in

the

Inquiry/Calibration

Mode.

d.

VO:

This

potentiometer

adjusts

the

viewing

angle

of

the

display.

It

is

set

by

the

operator

to

optimize

the

readout

to

his

manner

of

using

the

instrument.

e.

SRATE

(one

switch,

three

positions):

These

switch

positions

select

the

rate

heard

from

the

speaker.

They

are

used

to

scale

down

the

count

rate

from

a

high

count

rate

detector

(e.g.;

ESP1.MAN/February

1992

3-3

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