Lowrance X-25 User manual

X-25
INSTALLATION ANDOPERATION
INSTRUCTIONS
LITHOINU.S.A. 988-0105-33 LOWRANCE ELECTRONICS,INC.
12000 E.SKELLY DR., TULSA,OK 74128
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N OTES
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N 0TES TABLEOFCONTENTS
INTRODUCTION 1
INSTALLATION 1
POWER CONNECTIONS 2
SPEED/TERMPERATURESENSOR 3
KEYBOARD BASICS 4
DISPLAY 5
MENUS 5
OPERATION 6
AUTOMATIC 6
RANGE 6
ZOOM-
AutomaticOperation 7
ZOOM-ManualOperation 8
SENSITIVITY 9
GRAYLINE® 9
FISH ID 10
CHARTSPEED 11
DISPLAY MODE 12
ALARMS 14
FISHALARM 14
DEPTH ALARMS 14
LAMP 15
FEET/METER 15
DISPLAY CONTRAST 16
ASP(AdvancedSignal Processing) 16
TRANSDUCERS ANDCONE ANGLES 17
SIGNALINTERPRETATION 18
FISH ARCHES 19
WATER
TEMPERATUREAND THERMOCLINES 20
SURVEYING ALAKE 22
BAITFISH 22
SONAR TROUBLESHOOTING 23
Copyright © 1990, Lowrance Electronics, Inc
All rightsreserved.
Allfeatures andspecifications subject tochange withoutnotice.
Allscreensin thismanual aresimulated.
26
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4.Theboatmustbe
moving
at
aslowtrolling
speedtoseefisharches. Iftheboat
Is motionless,fishstay inthe
cone,showing onthedisplay as straight
horizontal
lines.
ELECTRICALNOISE
A
major
causeofsonar
problems
iselectricalnoise. This
usuallyappears
onthe
sonar's displayasrandompatterns ofdotsorlines. In severe cases, itcan
completely
coverthescreenwithblack
dots,
orcause theunitoperate
erraticly,
ornotatall.
Toeliminate orminimize theeffectsofelectrical noise, first
trytodeterminethe
cause. Withtheboatatrestinthewater, thefirst
thing you shoulddoisturn all
electrical equipment ontheboatoff. Makecertain theengine isoff, also. Turn
yourX-25
on,thenturnoffASP(AdvancedSignal Processing). Thereshould
be
asteadybottom
signalonthe display. Nowturnon each piece ofelectrical
equipment
ontheboatandviewtheeffectonthesonar's display. Forexample,
turnonthe
bilgepump
andviewthe
sonardisplayfor
noise. Ifnonoiseispresent,
turnthepump
off,thenturnontheVHFradioandtransmit. Keepdoing
thisuntil
all electrical equipment hasbeenturned
on, theireffectonthe sonardisplay
noted, thenturnedoff.
If
you
findnoiseinterferencefromanelectrical instrument,
trolling
motor, pump,
orradio, tryto isolate the problem. Youcanusually re-routethesonarunit's
powercable andtransducercable away
fromthe wiringthat is causing the
interference. VHFradioantennacablesradiate noisewhen transmitting, sobe
certain tokeep thesonar'swiresaway fromit. You
may
needtoroutethesonar
unit's
powercable
directly
tothebatteryto isolate itfrom
otherwiring
ontheboat.
Ifno noisedisplaysonthe sonarunit fromelectrical equipment, then make
certain everythingexceptthe sonarunitisturnedoff, then startthe engine.
IncreasetheRPMwiththe
gearshift in neutral. Ifnoise appears onthedisplay,
theproblem couldbeoneofthree
things;sparkplugs, alternator, ortachometer
wiring. Tryusing resistorsparkplugs, alternatorf
lIters,or routing
thesonarunit's
power
cable
away
fromengine wiring. Again, routing thepower
cable
directly
to
thebatteryhelps eliminatenoiseproblems. Makecertain tousethein-line fuse
supplied withtheunitwhenwiring
thepower
cabletothebattery.
Whennonoise
appearsonthesonarunitafterall ofthe above tests,thenthe
noisesourceis probablycavitation, Manynovicesor persons with limited
experience
makehastysonarinstallations which function
perfectly
in shallow
water,
orwhentheboatisatrest. In
nearlyall
cases,thecause ofthemalfunction
willbe the location and/or
angle
ofthetransducer. Thefaceofthetransducer
mustbeplaced in alocationthathas asmoothflowofwateratallboatspeeds.
Readyour transducerownersmanualforthebestmounting position.
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Weakbottom echo,digitalreadingserratic,
ornofishsignals(cont.): INTRODUCTION
2.Electrical noisefromthe
boat'smotorcaninterfere withthe
sonar. Thiscauses
thesonartoautomatically increase its Discrimination ornoise rejectionfeature.
Thiscancausethe
unittoeliminate
weakersignals
such
asfishorevenstructure
fromthedisplay,
3. Thewater
maybedeeper
thanthe sonar's ability
tofindthebottom. Ifthe
sonarcan'tfindthebottom
signalwhileit'sintheautomatic
mode,the
digital
will
flashcontinuously. Itmaychange
therange tolimitsfar
greaterthan
thewater
youarein. Ifthis
happens, placetheunitinthemanualmode, then
change
the
rangetoarealisticone,(forexample,0-100
feet)
andincreasethe
sensitivity. As
youmove Intoshallowerwater,abottom
signalshould
appear.
4. Checkthebattery
voltage,lithe voltagedrops,
theunit'stransmitter
power
alsodrops, reducing itsability tofindthebottomor targets.
Bottomecho disappearsathighspeedsorerratic digItalreadingorweak
bottomecho
whileboat ismoving
1. Thetransducer may
beinturbulent
water. Itmustbemounted in asmooth
flowofwater
in orderforthesonar
toworkatallboat
speeds.Air
bubbles inthe
waterdisrupt thesonarsignals,interfering with itsability
tofindthebottomor
other
targets. Thetechnicalterm
forthisis'Cavitation'.
2. Electricalnoisefromtheboat'smotorcan
interferewiththesonar. This
causes
thesonartoautomatically increase itsDiscrimination ornoiserejection
feature.
Thiscancausetheunittoeliminate
weakersignals
suchasfishoreven
structure
from
the
display. Tryusing resistorsparkplugs
or
routing
Ihesonar
unit's
power
andtransducer cables away fromotherelectrical wiring onthe boat.
NofisharcheswhentheFishIDfeature
Isoff:
1. Make certain thetransduceris pointing straightdown. This isthe most
common problemifapartial
archisdisplayed. SeetheFishArchsectionin your
owner's manualformoreinformation.
2. Thesensitivity may
notbehigh
enough. Inorderforthe unittodisplay
afish
arch, ithastobeabletoreceive thefish's
echofromthetimeitenters thecone
until Itleaves. Ifthesensitivity isnothighenough,
theunitdisplays thefishonly
whenit isinthecenterofthe cone.
3. UsetheZoomfeature. Itismuch easierto
display
fish
arches whenzoomed
inonasmall
range ofwaterthanalarge
one. Forexample, youwill have much
betterluck
seeingfisharches witha
30to60footrangethanaDto60footrange.
Thisenlarges thetargets,allowing thedisplay
toshowmuch more detail.
Thank
youforpurchasing aLowrancqsonar. YourX-25isahigh
qualitysonardesigned forbothprofessionalandnovice fishermen.
These
unitshave anautomatic feature
thatfindsand
displays
the
bottom, fish, structure, and morel Allyou havetodois
press
the
on
s. key. However, ifyouwishtofinetune
the
unit,allyouhavetodois
press the
menukey. TheX-25haspowerful featuresavailable through
easy-to-use menus.
Togetstarted with your unit,firstreadtheinstallation section.This is
where
itallbegins, Improper installationcancause problems
down
the
road. Afteryou've
readtheinstnjctions, installtheunit,
then readthe
restofthemanual. Themore youknowaboutyourunit,
thebetterit
willperform foryou. Take thismanual forreference when
youheadfor
thewater.
INSTALLATION
MounttheX-25in anyconvenient location, provided
thereisclearance
whenit'stiltedforthebest viewingangle. Holes in thebracket's base
allowwoodscrew or
through
boltmounting. Itmaybenecessary
to
place
apiece ofplywood onthebacksideofthin panels to'reinforce
thepanel. Make certainthereisenough roombehindtheunittoattach
thepower and transducer cables.
Drillahole inthedashforthepower and transducer cables.Thebest
location
forthisholeisimmediately underthegimbal bracket.This
way, thebracket coversthehole. Thesmallest holeboththepower
andtransducercablescanpassthrough isone inch. However, you
can'tpassapowerortransducer connector and anothercable
through
1
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aoneinch hole. TherefOre, after
drilling thehole, pass
thetransducer
connector
upthrough theholefromunderthedash. Then
dropthe
power
cabledown
fromthefrontsideofthedash. Slide thebracket
overthehole, thenroutethetransducer andpowercables outtheslots
in thebracket. Finally,
fastenthe
bracket tothedash.
POWER CONNECTIONS
TheX-25worksfroma12voltDC system
only. Forthebestresults,
runthepower cable
directly
totheboat's battery. Keep
the
power
cable
away
fromotherboat
wiring, especiallytheengine's wires. This
willgivethebestisolation fromelectrical noise. Ifthe
supplied cableis
notlongenough toreach thebattery; splice#18gauge
insulatedwire
toit. Youcanattach
thepower cabletoanaccessory orpowerbuss,
however, youmayhave problems with electrical interference. See
page 25formoreinformation on
electrical noise.
Thisunithasreverse polarity protection. Nodamage
willoccurifthe
power
wiresarereversed. However,the
unitwillnotworkuntil the
wiresare attached
correctly.
3amp
FUSE
IMPORTANT
SERVICE INFORMATION!
Ifyour
unitisnot
working,
orifyou need
technical help,please usethefollowing
troubleshooting sectionbefore contacting
aservice centerorthe factorycus-
tomerservice
department.
It
maysaveyou
thetroubleof
returningyourunit.See
theHowToObtainService sectiononpage26ifyou needservice.
SONAR
TROUBLESHOOTING
Unitwon'tturnon:
I. Checkthe
powercable's
connection atthe unit. Alsocheckthewiring.
2. Make
certain thepowercableiswired
properly. The redwireconnects
tothe
positivebattery
terminal, blacktonegative or
ground.
3. Checkthe
fuse.
4.Measurethe
batteryvoltage
attheunit's
powerconnector. Itshouldbeatleast
iivolts.Ifitisn't,thewiringtotheunitis
defective,thebatteryterminals
orwiring
ontheterminals are
corroded,
orthe
battery
needscharging.
Unit
freezes,locksup,oroperateserratically:
1. Electrical noisefromthe
boat's
motor,trolling motor,oranaccessory maybe
interfering withthesonarunit.Re-routing thepowerandtransducer cables
away
fromotherelectrical wiring
ontheboatmayhelp. Route the sonarunit's
power
cable
directly
tothe battery
instead of
through
afuseblockorignition switch
2. Inspect thetransducercablefor
breaks,cuts,
orpinchedwires.
3. Checkboth the
transducerandpowerconnectors. Makecertain both are
securelyplugged intotheunit
Weakbottom echo, digitalreadingserratic, or nofishsignals:
1. Makecertain transducerispointingstraight
down. Cleantheface ofthe
transducer. Oil,
dirt,andfuelcancauseafilmtoformonthetransducer, reducing
its effectiveness. Ifthe transduceris mounted inside the hull, besure it is
shooting through only
onelayer
of
fiberglass andthatitis securely
bonded tothe
hull. Do NOTuse RNsilicone
rubberadhesive orMarinetexid.
23
RED
WIRE
TO
SPEED!
TEMP
SENSOR
2
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SURVEYINGALAKE
Themostsuccessful anglers onanybodyofwaterarethosewhofish
itdayafterdayand yearafteryear. Eventually, theylearn thehot
spots
thatproduce fishconsistently. Theydiscover
through experi-
ence
where, andatwhatdepth,theycan expecttofindthefishthey
wantatanyseason. And
theyrealize thattheseproductiveareas
change throughout the yeardepending onwater
level, temperature,
food, andotherfactors.
Withthe
X-25, anyone caneliminate guesswork and concentrate on
theareaswhere fisharelikelytobe. Even ifit'sthefirsttimeonthe
lake!
Themostefficientwaytobecome acquainted
withabody ofwateris
tosurvey itwithyourX-25. Startwith amap ofthelake,if possible,
and indicatethepromising spots
inrelation to landmarksonshore.
As yougoabout your
survey, yourX-25willtellyou
thedepth and
typeofbottom. Itwillalsoreveal suspended fish.
Keep
afewmarker buoys
in theboat, readytotossoverboard. When
theX-25indicates aschool offish,throwthebuoy
out. Withthe
schoolthusmarked,youcanmake
yourturnand comebacktofishin
exactlytheright spot. Thisisessential when you're
farfromshore on
abiglake. Unlessyoumark theschool offishwhen
you'reoverit,
youmaynot beabletofinditagain.
BAIT FISH
Theimportanceofbaitfishtosuccessful fishing can'tbeover-empha-
sized. They aretheprinciple foodofallgame fishinmost waters.
Baitfish arethe
plankton feeding foragefish, suchasminnows and
shad. Baitfishcanalso betheyoung ofgame fish, suchas crappies,
bluegill,andbass.
Mostbaitfishconcentrate within fivefeetofthesurface where
sunlight
promotes thegrowth oftheplankton onwhichtheyfeed. Onemethod
offishing istousetheX-25
tQfindthebaitfishfirst. WiththeFish ID
feature off,aschool ofbaitfishwill looklikea"cloud"onthe
display.
Usually,game fishwillbenearby,oftendirectly
beneaththeschool of
baitfish.
22
SPEED/TEMPERATURE SENSORINSTALLATION
(RequiresOPTIONAL
LST-T
Speed/Temp
Sensor)
Mountthe
speed/temp sensorontheboat'stransom
inalocation
wheretheflowofwater
isthesmoothest. Thereshouldbeaminimum
ofturbulence
andairbubbles inthechosenlocation. Theport(left)
sideofthetransom ispreferred, however, thestarboard (right) side
canbeused
ifnecessary. Donot mountthespeed sensorbehind
strakes, ribs,
orthru-hull fittings.Thesewilldisturbthe
flowofwaterto
thespeed sensor. Ina
typicalinstallation, thespeed sensor
is
mounted sixtotwelve inches fromthecenterline ofthehull. The
sensormustalways beinthewatertofunction
properly. Make
certain
thechosen location isin thewatereven athigh speed orwhenthe
boatison
plane.
Once
youdeterminethe properlocation, place
thesensoronthe
transom. Makecertain thesensor'sbottomisflushwiththebottomof
thehull. Markthetransom
in fourplaces, twoineach slot. Drilla
5/32"mounting holeateachlocation. Mountthesensortothehullwith
four#10stainless steelscrews(notincluded). Usea
good
gradeof
caulking compound tosealthescrews. Adjust
thesensor
so itisflush
withthebottomofthehullandtightenthescrews.
Ifthebaseofthetransom hasaradius, fillthegapbetween the
transomand thesensorwithcaulking compound. Thiswillhelpinsure
asmooth waterflow.
Routethesensorcabletothe
in-lineconnectorontheX-25's power
cable. Thespeed/temp sensorisnow ready
foruse.
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KEYBOARDBASICS
Theunitsoundsatonewhen
youpressanykey. Thistellsyouthe
unithasaccepted acommand.
ON/CLEAR
Usethiskeytoturntheuniton. Italso clears menuselections andthe
menus fromthescreen.
OFF
Thiskeyturns
theunitoff.
MENU
TheX-25hasmanymenus offeaturesthatareaccessed withthiskey.
UPand DOWN ARROWS
Use these
keystoadjustvirtuallyevery
feature and function onthe
unit. Usethesekeys toadjust the
sensitivity, chart speed, range,and
more.
NOTE:Theuparrow
keyalso stops
and startsthechartwhenno
menus
aredisplayed. Inotherwords, anytimeyouwishtostopthe
chart, firstmake certain nomenu isonthescreen. Thenpress theup
arrow
key. Thechartwillfreezeandtheword"STOP'appears atthe
toprightportion
ofthescreen. To startthe
chart, press the
up
arrow
keyagain. 4
Thetemperature ofwaterinthelake isseldomconstant fromtopto
bottom. Layers ofdifferent
temperatures form, and
thejunction ofa
warmand coollayer
ofwateriscalleda
thermocline. Thedepth and
thickness ofthethermoclinecanvarywiththeseasonortimeofday.
Indeeplakes theremaybetwoormoreatdifferent depths.
Thermoclines areimportant tofishermen
becausetheyareareas
wherefishareactive. Manytimesbaitfishwillbeabove the
thermocline whilelargergame fishwillsuspend in or
lust
belowit.
TheX-25candetectthisinvisible layerin
the
water, butthesensitivity
willprobably
havetobeturneduptoseeit.
21
830
750
770
760
750
680
560
500
470
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Verysmall fish probably
will notarchat all. Medium sizedfishwill
showapartial arch, orashape similartoan arch ifthey'rein deep
water. Largefishwillarch, butturnthesensitivityupin deeperwater
toseethearch. Becauseofwaterconditions, suchas heavy,
surface
clutter,thermoclines, etc.,thesensitivity sometimes cannot bein-
creased enough
toget fisharches.
Oneofthebest
waystoget
fisharchesistoexpand or "zoom"a
segment 01thewater. Forexample, from45to60feet. Thesmaller
thesegment,thebetterthescreen resolution willbe. Theeasiest
way
todothisontheX-25iswiththeZoomfeature. Thisfeatureexpands
theechoes,making iteasiertoseedetail. Forthebestresults, turn
thesensitivityupas highaspossible without
gettingtoomuchnoise
onthescreen. Inmediumtodeepwater,this method should workto
displayfisharches.
If
youseefishsignals whentheunitisin the manual mode, butdon't
get
fishsymbols whentheFishID.featureison,tryincreasing the
sensitivity.
WATER TEMPERATURE ANDTHERMOCLINES
Water
temperature has animportant-if not controlling-influence upon
theactivitiesofallfish. Fishare coldblooded andtheirbodiesare
alwaysthetemperature ofthesurrounding water. During thewinter,
colderwaterslowsdowntheirmetabolism. Atthistirrie, they need
aboutafourthas much foodastheyconsume inthesummer.
DISPLAY
-General
Thelights flashforabout tenseconds whentheX-25isturnedon.
Three menus appear, oneaftertheother. Themenusarethelights
(LAMP), feet-meterselection (FEET/METER), andcontrast adjustment
(DARK/LIGHT). Toturnthelights on,press
the
uparrow key. To
switchfromfeettometers, press thedownarrow
key
whentheproper
menu appears. Toadjust thecontrast, waitfortheDARK/LIGHT
menutoappear. Nowpress theuparrow keytodarken the
screen,
thedownarrowtolighten it. Themenus disappear afterafewsec-
onds. If
you
don'twanttowaft,presstheON/CLEAR keytoclearthe
menusfromthescreen.
When theX-25isfirstturnedon,thedisplayappears similartotheone
below. Theunitisin theautomaticmode andtheFishID featureison.
Thedepth rangedisplays ontheleftsideofthescreen. Inthisex-
ample, therange isfrom0to60feet. Thedigital
bottom
depthdisplay
showsatthe
topleftportion
ofthescreen.
'ii--
37,3FT
4-c
Mostfishdon'tspawn unlessthewatertemperature iswithinrather
narrow limits. Thesurface temperature meterbuilt intotheX-25helps
identifythedesired surface waterspawning temperatures forvarious
species. Troutcan'tsurvivein streams
thatgettoowarm. Bass and
otherfisheventuallydie outwhenstockedin lakesthatremaintoo
cold during thesummer. Whilesome fishhaveawider
temperature
tolerancethan
others,each hasacertain range within which ittriesto
stay. Schoolingfishsuspended over
deepwaterlieatthelevelthat
provides thistemperature. We assume theyarethemostcomfortable
here.
20
MENUS
TheX-25usesmenustoguideyouthrough theunit's functions
and
features. Themenu keyaccessesthesefeatures, allowingyouto
customizetheunittoyourparticular needs and waterconditions.All
you havetodotoleaveonemenuand enteranotherispress
themenu
key repeatedly. If youevergetlostinthemenus, simplypress the
ON/CLEAR key. Thisclearsthemenus fromthe
screen,
5
•1
a
F -
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Menus change depending onthemodetheunitisin. For
example, if FISH ARCHES
theautomatic mode isturnedoff, thesensitivity menuchanges from
"AUTOSENS"to"MANSENS." Other messages mayappear
in
menu boxesornew menus can
appear, again depending onprevious
selections.
OPERATION
Fisharches are createdwhentheconeofsound passes overafish.
Thedistance
toafishwhentheconefirststrikes itisshown as"A"
below. Whenthecenteroftheconestrikes thefish, thedistanceis
shorteras shown "B". Astheconeleaves thefish, thedistance
increases again asshownin"C".
AUTOMATIC
WhentheX-25isfirstturnedon,theauto-
maticfeatureisenabled. Thisfeature
automatically adjusts
theunit's
range
and
sensitivity according towaterconditions. It
alwayskeeps
thebottom depth displayed
in
thelower
portion
ofthescreen.
Toturntheautomaticfeature
off,pressthe
menu keyuntiltheAUTO/MANmenu
appears. Nowpress thedownarrow key.
Thishighlights theletters "MAN." Theunit
isnowinthemanual mode. Waitafew
secondsandthemenuwillscroll offthe
screen'sleftside. Pressing theON/CLEAR keyalso clearsit. Toturn
theautomatic featureonagain, repeat theabove steps, except
this
timepress the
up
arrow
key.
RANGE
Youcan'tadjust the range whentheX-25
isintheautomatic mode. Itisadjustable
whentheunitisinthemanual mode,
however. Todo
so,firstput
theunitin the
manual mode. Now
presstheON/CLEAR
keytoclearthescreen. Thenpress
the
menu keyuntilthe'RANGESEL"menu
appears
asshown. Thecurrentrange
showsatthebottomofthemenu. Inthis
case,
therange is60feet. Nowpress
the
uparrow keytodecreasethe
range, the
downarrow
keyincreases therange. After
youselectthedesired range, pressthe
WhentheFishID.mode isoff,thedepth ofthe
waterwillaffectthe
sizeand shape
Qf
thefisharch duetotheconeangle diameter. For
example, iftheconepasses
overafishinshallow water, thesignal
displayed ontheX-25may notarch atall. Thisisduetothe narrow
cone diameterandtheresolution limitations ofthe
display.
19
BOATSDIRECTION OFTRAVEL
iiUTO
A B C
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Both8degree and20degree
transducers giveaccurate bottomread-
ings,even though
thebottom signal is much wideronthe20degree
model. Thisisbecause youareseeing more ofthebottom. Remem-
ber,theshallow
edge ofthesignal shows
youthetruedepth. The
restofthe
signaltellsyouwhether
youareoverrocks, mud, etc.
SIGNALINTERPRETATION
YourX-25 gives anaccurate picture ofthebottomthatyourboatis
passing. Abottomoffirm sand,gravel, shell, or hardclayreturnsa
fairly
wide
signal. Iftheautomatic mode isoffandthesignal narrows
down,thenitmeansthatyouhave movedoveramudbottom. Mud
absorbsthesound waveand returns aweak signal. Turn upthe
sensitivitytoseeabetterbottom signal.
Big rocksorstumps
onasmooth bottomsend backsignalsabove the
bottom levelsignal. Theheightofthesignaldepends
onthetarget's
height. Asyou passoverapost, itshould beclearly visibleas ashort
lineextending abovethebottom
signal.
Asteep slopereturns awidesignal, thesteeperthewider. Signals
returnedfromahighunderwater cliff are usuallythewidestofall.
ON/CLEAR keytoclearthedisplay. Ifyouwaitafew
seconds, itwill
automatically clear.
ZOOM
Thezoomfeature enlarges allechoesonthescreen. If
theunitisin
theautomatic mode,
ittracksthebottom
signal,alwayskeeping itnear
thebottom
ofthescreen. Thislets youseesmall detail, atthesame
timeenlarging allechoesthat appear
onthescreen. Theunitdoesn't
trackthebottom in
themanual mode, andtheadjustments areslightly
different.
Zoom-Automatic Operation
Tozoomthe
display, firstpress theMENU keyuntil theRANGE/
ZOOMmenu appears. Nowpress thedownarrow key. Thisswitches
theunitintothezoom
mode. Anewmenu immediately appears as
shownontheright.
ZM—— 20
31.4
FT
ZOOM
SIZE •
•- t
a
TRACK
if •i
w-p.
C
Thisisthezoom sizemenu. Zoomsizeisthedistance between
the
upperlimitandthelowerlimit. Theupperlimitshows atthe
topleft
cornerofthescreen. Thelowerlimitis in thebottomleftcorner. For
example, iftheupperlimitis40feet and thelowerlimit is70
feet,the
zoom windowsizeis30feet. Theword "TRACK"
appears in this
menu when
youfirstactivatethezoom. This meanstheX-25istrack-
ing
thebottom inazoom
window,
always keeping itonthe
display.
18 7
RANGE
373FT et
L r U
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Press theuparrow keytodecreasethe
zoomsize, press thedownarrow keyto
increase thezoomsize.
Whentheunitisswitchedintothezoom
mode,
thetellers
"ZM"appear atthe
top
ofthescreen. Thezoomwindowsize
displays
inthe
topright
cornerofthe
screen.
Toturnthezoomfeature
off,
pressthe
menu keyuntiltheRANGE/ZOOM menu
apears. Nowpress
the
up
arrow
key.
Thisswitches theunitintotherange mode,
featureoff.
Zoom -ManualOperation
E ZM——20
3IAFT
ZOOM
SIZE '-
Wa
2OFT
C
Tooperate thezoomfeature
whentheX-25isinthemanual mode,
firstpress themenu key. Thenpress
thedownarrow keyinthe
RANGE/ZOOM menu toplace
theX-25in
thezoommode. Thezoomsizemenu
automatically appears next. Youcan
change
thezoomsizebypressing theup
ordownarrows. Afteryouselectthe
desired zoomsize, press themenu key
untilthe"MOVEZOOM"menu appears.
Thismenu lets youmovethezoom
window
upordownin onefootincrements
by pressing thearrow keys. Thus, you
canmove thezoomwindow
uptowards
thesurface, downtothe
bottom,
or
anywhere inbetween. Thewindow stays ____________________
whereyouputit. Itdoesn'ttrackthe
bottom
signal.
Toturnthezoomfeature
off,pressthemenu keyuntil theRANGE/
ZOOMmenu appears. Nowpress
theuparrow
key. Thisswitches
theunitintotherange
mode,
which
turnsthe zoomfeatureoff.
TRANSDUCER CONE ANGLES
Thesound waves fromthetransducer spread
outintothewater in a
coneshaped beam. Thislooks much likethebeamfroma flashlight.
Theangle between theoutside
edges oftheconeisthecone angle.
Lowrance offers achoice oftransducers witheither
an8or 20degree
cone
angle. Thetransducer supplied withtheX-25hasa20degree
coneangle. Typically, wideconeangle
transducers (20 degrees) are
idealforoperating inshallowtomedium waterdepths. The20degree
coneangle
allows
you
toseemore ofthe
underwater world. In15
feetofwaterthe20degree conecovers
anareaaboutsixfeetacross.
The8
degree transducer covers onlyaboutatwofoot circle.
The20degreetransducer isalmost always thebesttouseinfresh
water, the8 degree mostly in salt water. Inadeep
waterenviron-
ment, (300
feet -freshwater, 100 feet-saltwater)
thenarrowcone
angle ismore desirable. Since thesound energy
isconcentrated ina
smaller
area, itcan penetratetomuchdeeperdepths..
whichturnsthezoom
C ZM——2O
34I4FT
C
50'
100'
150'
200'
8DEGREE
8 17
20 DEGREE
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TochanQefromfeettometers or
vice-versa, press themenu keyuntil SENSITIVITY
theFEEt/METERmenuappears. Pressthedownarrow keytoswitch
tometric,theup arrowtoswitchtofeet. Displays show infeetwhen
theunitisfirstturnedon. Themenuwillclearautomatically afterafew
seconds orpress theON/CLEAR keytoclear
thescreen.
DISPLAYCONTRAST
Theunit's
display
contrastisadjustableto
suit different
lighting conditions. Thiswill
helpyouseethescreenfromdifferent
angles, oratvarious timesoftheday.
Toadjust thecontrast, press
themenu key
untiltheDARK/LIGHT menu appears. To
decrease
it,press thedownarrow key.
Presstheup arrow
keytoincreasethe
contrast. The
bargraphinthe Dark/Lightmenu boxshowsa
graphof
thecontrast. Thescreen willalso showtheeffectsofthechange. If
youreachthemaximum or minimum level, atonesounds alerting you
tothelimits. Themenu willclear
automatically afterafewsecondsor
youcanpress
theON/CLEAR keytoclearthescreen.
ASP(AdvancedSignal Processing)
ASPisaprogramembedded intheX-25's
computerthatisspecifically designed to
eliminatenoise. It
continually monitors
the
signals fromthereceiver, determines
which echoesarenoise andrejects them.
Thisallowstruetargetechoestodisplay
onthescreen withaminimum ofclutter.
Thisfeature isespeciallyusefulsinceit
typically lets youoperate theboatatall
speedswithout adjustingthe
sensitivity or
othercontrols. When theX-25isfirst
turnedon,ASPisenabled. ToturnASP
off,press
themenu keyrepeatedly until theASPmenuappears. Now
presstheuparrowtoturnitonorthedownarrowtoturnitoff. The
menuwillclearautomatically afterafewsecondsoryoucanpressthe
ON/CLEAR keytoclearthescreen.
Thesensitivity menu letsyoucontrol
theunit's
ability
topickup ech-
oes. Alow
sensitivity levelexcludes muchofthebottom
information,
fishsignals, and otherdetail. Nigh sensitivity settings
lets yousee
features, butitcanalsoclutterthescreen
withnoiseandotherun-
wanted
signals. Typically, thebestsensitivity levelshowsagood,
solidbottom
signal withgrayline.
TheX-25adjusts the
sensitivity level tokeepasolidbottom
signal on
the
screen. Itaddsalittleextra whenit'sin theautomatic mode. This
givesitthe capability
toshow fishand otherdetail. However,
situ-
ationsoccur
whereitbecomes necessarytoincrease ordecreasethe
sensitivity level. Typically, thisoccurs when
you
wishtosee more
detail,
soyou needtoincreasethesensitivity. Theprocedure
toadjust
itisthesame
whethertheunitisin theautomatic ormanual mode.
Tochange thesensitivity level, firstpress
themenukeyuntil the
sensitivity menu
appears. Iftheunitisinautomatic, the
menu shows "AUTOSENS." Otherwise,
themenushows"MANSENS." Now
press
theuparrow keytoincrease the
sensitivity,thedownarrow todecreaseit.
Averticalbargraphinthemenu box
showsthesensitivity level. Echoes
scrolling ontothescreen wilt also showthe
effects
ofthesensitivity change. Ifyou
reachthemaximum orminimum sensitivity
level,atonesounds alerting youtothe
limits.
Afteryou'veadjusted theunittothedesired sensitivity level, press
the
ON/CLEARkey toclearthe
display. If youwaitafewseconds, itwill
automatically clear.
GRAYLINE
GRAYLINE letsyoudistinguish between strong
andweakechoes. It
"paints"gray
on
targets
thatarestronger
thana
presetlevel. This
showsthedifference between ahardorsoftbottom, large
fishversus
smaller
ones,
orrocksandbrush onthebottom. Forexample, a soft,
muddy, orweedy bottomreturns aweaker
signalwhichshowsa
16 9
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narrow
ornograyline. Ahardbottomreturnsastrong signalthat turnthealarm Soundoffuntiltheshallowalarm istriggered again.
causesawide
grayline.
Ifyouhavetwotargets ofequalsize, onewithgray
andtheother
without,
the
targetwith grayisthestronger
echo. Thishelps distin-
guish
fishfromstructure, orthelarger fishfromasmallerone.
GRAYLINE ® isadjustable. Sinceitshowsthedifferencebetween
strong
andweakechoes, changing thelevelmayrequire adifferent
sensitivity setting.
Tochange theGRAYLINE level, first press
theMENU
key
until theGRAYLINE menu
appears. Nowpress
theuparrow keyto
increasethelevel, thedownarrow to
decreaseit. ThebargraphintheGRAY-
LINE menu boxshowsthelevelnow in
use. Echoes scrolling ontothescreenwill
alsoshow
theeffectsoftheGRAYLINE
change. If youreach themaximum or
minimum level, atonesoundsalertingyou
tothelimits.
Thelevelchosen bytheX-25whenit's first
turnedonisusuallyadequate formostconditions. Experimentwith
your
unittofindtheGRAYLINE setting that'sbest.
FISH IDFEATURE
TheFish IDfeature identifies targets
thatmeetcertain conditions as
fish. Themicro-computer analyses allechoesandeliminatessurface
clutter, thermoclines, and otherundesirable
signals. Inmost in-
stances, remainingtargets
are fish. TheFishIDfeature
displays
symbols onthescreen in place
oftheactualfishechoes. Thereare
foursymbol sizes: tiny,small, medium, andlarge. Theseshowthe
relativesizebetween targets. Inotherwords, itdisplays asmallfish
symbol
whenitthinksa
targetisasmallfish, amediumfishsymbol
on
a
largertarget, etc.
Themicro-computer issophisticated, butitcanbefooled. Itcan't
distinguish between fishand othersuspended objects suchas turtles,
submerged floats,
airbubbles, etc. Individualtreelimbs extending
outwardsfromagroup oflimbs arethehardest
objects fortheFishID
10
Toturnthealarm
off,press themenu key until theshallow alarmmenu
appears. Then press the uparrow keyuntiltheword"OFF"appears.
Thealarmisnowoff.
LAMP
Deep
Alarm
Thedeep alarm adjusts
thesameasthe
shallowalarm. Usethe"DEEPALARM"
menu toadjust thedeepalarm. Whenthe
bottom
signal goesdeeper
thanthe
setting, analarmtonesounds.
TheX-25'sdisplayisbacklighted fornight
use. Toturnthebacklights onoroff,press
themenukeyrepeatedly untiltheLAMP
menuappears. Nowpressthe
up
arrowto
turnthelights onorthedownarrow toturn
themoff. Themenuwillclearautomati-
callyafterafewseconds oryoucanpress
theON/CLEAR keytoclearthescreen.
FEET/METER
TheX-25canshowthe
depth in feet or
meters. Whentheunitisinthemetric
mode, alldepth readings, ranges,zooms,
andalarm settings are in meters. Speed
displays
in knotsandlogisinnautical
miles. Temperature isin
degrees Celsius.
Whenit'sinthefeetmode, allofthe
abovesettings are in feet, miles perhour,
andstatute miles. Temperature showsin
degrees
Fahrenheit.
15
373FT tt
:-C. ______
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ALARMS
FISH ALARM
TheFishAlarmsounds atonewhenafish
symbol appears
onthescreen. Tousethe
fishalarm,
press themenu keyuntilthe
"FISH ALARM"menuappears onthe
screen. Nowpress theuparrow keyto
turnthealarm on. Repeat theabovesteps
toturnthefishalarm off. (Note: IftheFish
IDfeatureisoff,itwillbeturned
onwhen
youturnthefishalarm on.)
DEPTH ALARMS
Thedepth alarms are triggered only bythebottom signal. Noother
echoeswillactivate thesealarms. Thedepth alarms consistofa
shallowand
deep
alarm. Theshallowalarm sounds analarm tone
whenthebottom
goesshallowerthanthealarm'ssetting. Thedeep
alarm
soundsatonewhenthebottomgoesdeeper thanit'ssetting.
Bothalarms adjust
the
same, althoughthrough
differentmenus.
ShallowAlarm
Tosettheshallow
alarm,pressthemenu
keyrepeatedly until the"SHALALARM"
menu appears. Pressthedownarrow key
toincreasethedepth, the
uparrowkey
decreases it. Thenumber in theshallow
alarm's menu boxshowsthecurrent
shallow alarmsetting. Whenthenumber
reachesthedesired setting, release the
arrowkey. PresstheON/CLEAR keyto
removetheshallowalarm menu fromthe
screen. Nowwhenthe
bottom
depth goes
shallowerthan
thealarm's
setting
an
alarmtonesounds. Atthesametimethe
alarmsounds, amessage boxappears
on
thescreenasshown atleft. Press theup
arrowkeytosilencethealarm. Thiswill
featuretodistinguish fromfish. Youmay seeFish IDsymbols onthe
screen when, in
fact,therearenofish. Practicewiththeunitwhenthe
FishIDfeatureison and offtobecomemore familiarwith Fish ID.
When theX-25isfirstturned
on,the Fish
IDfeatureisautomatically turnedon,also.
Toturnthisfeatureoff, press themenukey
until theFishIDfeature'smenuappears as
shownbelow. Nowpress thedownarrow
key. Thisturnsthefeatureoff. Toturnit
back
on, repeattheabove steps, butpress
theuparrow keyinstead.
TheFishIDfeaturecan'tbeused whenthe
X-25isin themanual mode. Ifyou turnthe
automatic feature
off,theFish IDfeature
willautomatically beturnedoff,also.
CHARTSPEED
Therateechoes scrollacrossthescreen iscalledthechartspeed. It's
adjustable bypressing themenu keyuntilthechart speedmenu
___________________ appears. Chart speedissettomaximum
— whentheX-25isfirstturnedon. To de-
__ crease it, press thedownarrow key.
ac ec Presstheup
arrow
keytoincreasethe
speed again. ThebargraphintheChart
.ec Speed menuboxshows a
graphofthe
speed. Echoes scrolling ontothescreen
willalso showtheeffectsofthechange.
Ifyoureachthemaximum orminimum
level, anwarningtonesounds.
Tostop
the
chart, firstclearany
menu
from
thescreen by pressing theON/
CLEAR key. Youcan'tstopthechart while
amenuisdisplayed. Nowpressthe
up _____
arrow key. Thechartwillfreezeandthe
word"STOP"appears atthetopright
portion
ofthescreen. Tostartthe
chart, ________
press theuparrow keyagain.
373FT
FISH
ID
373FT act ml--
373FT
CHART
SPEED
—s
C— -STOP
373FT
a-c
14 11
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DISPLAYMODE
CHT1 (Chart#1)
Thisisthedefault modeused
whenthe
X-25isfirst turnedon. Ithasthefollowing
features:
1. Automatic On
2. FishIDFeature On ____________
3. DigitalDepth Display On ___________________
CHT2(Chart#2)
SameasChart#1 plus digital surface
water
temperature display(Requires
optional LST-T Speed/Temp Sensor.)
CHT3(Chart#3)
Sameas Chart#1 plus digital speed
display.(Requires optional LST-T Speed/
TempSensor.)
CHT4
(Chart#4)
ThisistheHighSpeed Scroll mode. It
shiftsthechartspeed intohighgear,
scrolling echoesatahigh rate. Ithasthe
following features:
1. Automatic Off
2. FishIDFeatureOff
3. AllDigitalDisplays Off
DIG2
(Digital #2)
Thedigital depth display showsatthe
top
ofthisscreen in
verylargedigits. The
digital temperature, speed, andlogshows
beneath thedepth. (Requires optional
LST-T
Speed/Temp Sensor.) Thelog
starts counting whentheX-25isfirst
turned on. Thelog isresettozerowhen
theX-25isturnedoff.
TheX-25hassixdifferentscreen modes. Tochangemodes, press
theMENU key until the"DISPMODE"(DisplayMode) menu appears.
Thenpress theupordownarrow
keysuntilthedesired modenumber
appears. Themodesareasfollows:
373FT
DIsP
MODE
•CHT 1 __ S
DIG 1 (Digital #1)
Thisisthefirstdigitalonlyscreen. It
showsthedigitaldepthdisplay atthe
topof
thescreenin verylarge numbers. The
shallowanddeep alarmsettings are
displayed
beneath the
digital depth. No
chartshowsonthisscreen.
DEPTH FT
[60.8]
I SHAL ALM
L OFT
I DEEP ALM
OFT
C ZM-—20
34•4FT
47MPH
DEPTH FT
[38.3]
I TEMP °F
L 76.2
[SPEED MPH
I 33.2
f LOGMI
L 2.9
C
12 13
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