Bedienungsanleitung SEAFARER 600 (Seite 6 von 9) (Englisch)

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GENER

AL OPERATION

The

"A"

range

is for genera I ust:

and

the

"B"

range

for

shallow

wat

work

with

the

range

intended

for

deep

water

echo

sounding.

(It

should

noted

that

echo

can be

obtained

short

range

air

for

test

purposes,

but

due

the

slower

speed

sound

air

the

echoes

will indi-

cate

depth

approximately

four

times

greater

than

water.)

1'0 use

the

instrument,

switch

one

the

three

ranges

and

the

Light

Emitting

Diode

will

flash

the diaJ.

Advance

the "gain"

(Sensitivety)

control

a clockwise

direction

until

further

light

flash

appears

the

dia!.

Thi

econd

indication

the

depth

water

ben

ath

the

face

the

transducer.

the

"gain"

control

advanced

than

is necessary

multiple

echoes

the

true

depth

will

appear.

Reducing

the

gain"

control

uutil

onl y the first

echo

obtained

will

improve

clarity

reading

and

sa\'e

battery

power.

locate

fish,

advancc

lhe

"gain"

ontrol

beyond

the

normal

setting

required

for

depth

indicati011 onl y.

Fish

will be

indicated

random

flashes

their

appropriate

depth.

should

noted

that

echo

return

from

fish

depends

011

the size

the

air

sack

and

varies

greatly

with

different

types

fish.

The

efficient

performance

all echo

sounders

depends

the

nature

the

sca bed.

For

instance, a

hard,

rocky

firm

sand

sea

bed

wil! reflect

back

uItra-

sonic

sound

waves

extremely

weil.

The

charac-

teristic

return

echo

from

a sea bed

this

type

shown

as a firm flash

light

the

dial

the

appropriate

depth.

the

other

hand,

deep

mud

large

amounts

keI

p wil! give a

weaker

reflection

and

produce

wider

in-

dterminate

flash.

With

practice

therefore

possible

ascertain

not

only

the

actual

depth

bul

also

the

type

of sea bed.

Under

normal

condi

tions

the

Seafarer

600

ample

power

reach

the

maximum

depth

100

falhoms

(200

metres)

marked

the

dial.

DEPTH ALARM OPERATION

audio

alarm

provided

the

instrument

give a waflling

when

the

depth

water

below

the

transducer

falls

below

pre-set

level.

set

the

depth

which

the

alarm

operates,

"alarm"

control

rotated

clockwise until

the

forward

edge

the

flashing

alarm

depth

indicator

the

dial

corresponds

the

depth

water

below

the

transducer

for

which

warning

Iequired.

(CA

UTION

the

transducer

mounted

vessel with

projections

below

the

transducer,

such

as a

k.eel

twin

biJge keels, etc.,

then

the

alarm

depth

setting

must

take

i11to

account

this

additional

depth,

grounding

be avoided).

The

alarm

depth

can

be set

any

range

the

equivalent

approximately

60 feet (20

metres)

but

the

most

accurate

settings will

achieved

the

shallow

water

range

scale

the

depth

water

below

the

transducer

than

the

depth

shown

the

alarm

depth

indicator

the

alarm

will

sound.

The

alarm

can

only

siJenced

reducing

the

alarm

depth

indication

rotating

the

alarm

contro

l in an

anti-c\ockwise

duralion.

i.e. to reduce the

alarm

depth

setting.

should

be noted,

howe

ver,

that

alarm

will

not

operate

below a

depth

approximately

3 fe

metre).

The

alarm

can

also

stopped

by sail ing

into

eper

water.

"HIGHj

LOW

" POWER OUTPUT

SWITCH

The

"Hi

gh Lo\\ "

P'l

wer

Output

Switch

controls

the

power

output

the

Seafarer

600 trans-

ducer.

The

switch is

provided

to reduce

batter

power

the

general

purpo

and

shallow

water

scales.

The

"Iow"

power

position

should

used

for

normal

operation

the

gener

purpose

and

shallow

water

"A"

and

"B"

The

"high"

power

position

should

be used on (he

deep

water

"C"

scale

when the sea bed is of a

soft

weedy

nature

giving a

poor

reftection.

is also

recommended

that

e "

high"

power pos

C>ti

on be

used to

reduce

the effect

electri

l i

nlerfcrence

allowing

reduction

the

tting

of (he gain

con trol.

Tbis

should

tried

before

reso

ng 10

the

use

suppres

sion

control.

NOISE SUPPRESSION CONTROL

This

switch

introduces

a su

ppression

circuit

reduce the effect

electrical

interference

on the

echo

sounder

from

ignition

systems,

generators

and

electrical

equipment

generally.

The

control

should

'be

used

sparingly

and

recommended

that

the

"high

power"

output

position

·.

selected

first

before

resorting

the use

the

noi

suppression

switch

electrically

noisy

envir-

onment.

With

high"

power

output

from

the

transducer

the

receiver

sensitivity

"ga

in"

can

reduced

, thus

reducing

the effect

interfer-

ence.

should

noted

that

when the

suppress

switch

is set to

"on"

the

brilliance

the

LED

Aash

the

dial is

reduced

on the

' range.

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