Eberline ESP-1 - SECTION I. GENERAL; PURPOSE AND DESCRIPTION

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MODEL

Е$Р-1

SECTION

1.

GENERAL

A.

PURPOSE

AND

DESCRIPTION

The

Eberline

Smart

Portable

(ESP-1)

is

a

microcomputer-based

portable

radiation

survey

instrument

designed

to

operate

with

most

Eberline

radiation

detectors.

The

ESP-1

can

display

the

data

from

these

detectors

in

radiation

units

as

selected

and

calibrated

by

the

user.

In

addition,

the

ESP-1

has

a

built-in

speaker,

with

earphone

output

capability,

available

for

use

by

the

operator.

The

external

controls

used

to

operate

the

ESP-1

are

located

on

the

face

of

the

instrument

in

a

single

row

of

seven

square

push

button

switches.

Two

are

"push

on-push

off"

switches

and

the

remaining

five

are

"push

on-normally

off."

Internal

controls,

accessible

through

a

door

on

the

right

side

of

the

instrument,

enable

the

user

to

adjust

and

select

other

functions

that

are

available

to

the

operator.

The

internal

controls

consist

of

four

potentiometers

and

four

switches.

The

ESP-1

readout

is

a

liquid

crystal

display

(LCD)

located

on

the

face

of

the

instrument.

The

power

supply

for

the

ESP-1

is

fully

self-contained

and

consists

of

six

"C"

cells.

Several

Eberline

probes

and

detectors

are

available

for

use

with

the

ESP-1.

The

Eberline

detectors

recommended

for

use

with

the

ESP-1

are

included

in

a

table

at

the

end

of

the

manual.

The

ESP-1

has

three

operating

modes,

Rate

Meter,

Scaler,

and

Inquiry/Calibration.

The

detector

signal

is

input

to

the

computer

and

converted

to

count

rate.

The

basic

unit

is

counts

per

second.

The

Rate

Meter

Mode

provides

the

operator

with

a

dual

representation

of

count

rate.

Count

rate

is

displayed

as

an

analog

bar

graph,

the

length

of

which

is

proportional

to

the

activity

at

the

detector,

and

as

a

numerical

value

expressed

in

the

applicable

radiation

units.

An

audio

alarm

feature

alerts

the

operator

when

an

alarm

setting

has

been

exceeded.

To

enhance

accuracy,

the

ESP-1

provides

both

a

slow

and

a

fast

range

of

time

response,

each

of

which

varies

automatically

with

count

rate.

The

Scaler

Mode

allows

the

operator

to

select

a

"counting

period"

over

which

the

computer

integrates

the

detector

signal.

On

the

first

line

of

the

LCD

the

instrument

displays

the

time

remaining

in

the

counting

period.

The

second

line

shows

cumulative

"events"

(the

basic

unit)

or

cumulative

radiation

units,

e.g.,

"R."

At

the

end

of

the

counting

period

the

instrument

displays

the

length

of

the

counting

period

and

the

total

number

of

events

or

radiation

units

counted.

The

scaler

mode

may

be

disabled

by

an

internal

switch.

An

Inquiry/Calibration

Mode

is

also

available.

This

mode

is

used

to

enter

and

adjust

various

parameters

as

necessary

1o

permit

optimum

operation

of

the

instrument

with

several

types

of

probes.

Tn

the

Inquiry/Calibration

Mode,

the

ESP-1

is

actually

measuring

in

the

Rate

Meter

Mode,

with

the

bar

graph

and

the

alarm

suppressed

and

with

the

slow

response

time

selected

to

enhance

accuracy.

This

mode

may

also

be

disabled

by

an

internal

switch.

ESP1.MAN/February

1992

1-1

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