Seiko ASTRON Basic Owner's Manual

4
DETAILEDINFORMATION
48
English
5
INCASEOFANUNUSUALMOVEMENTOFTHESECONDHAND
49
English
＜Readyforleapseconddatareception ＞
Leapsecond
Theleapsecondis
tocompensatefor
deviationsfromthe
universaltime(UT)
whichisastronomically
determinedandthe
InternationalAtomic
Time(TAI).
1secondmaybe
added(deleted)once
ayearoreveryfew
years.
 Automaticleap
secondreception
function
Aleapsecondis
automaticallyaddedby
receivingleapsecond
datafromGPSsignals
atthetimeofleap
secondaddition.
※Leapseconddata
includesinformation
aboutfutureleapsecond
additionandcurrentleap
seconddata.
WhenGPSsignals are receivedunder the following conditions,the leap second data
receptionisalsostarted.
・GPSsignalsarereceivedafterthesystemreset
・GPSsignalshavenotbeenreceivedforalongtime
・Leapseconddatareceptionhasfailed
(LeapseconddatareceptionisperformedagainduringthenextGPSsignalreception.
Itisrepeateduntiltheleapseconddatareceptionissuccessful.)
Theindicator hand displaysas shown at
theright when GPSsignals are received
(timezoneadjustmentortimeadjustment)
aroundJuneorDecember(displayofbeing
readyfor leap seconddata reception or
receivingleap second data).At this time,
thesecondhandpointstoanyofthe0to
18-secpositions to indicatethe waiting
timeuntil the leapsecond data reception
byminutes.Thewaitingtimeissubtracted
foreach minute, andwhen the second
handpointstothe0-secposition,theleapseconddatareceptionisstarted.
Itis recommended youmove to a placewhere GPS signalscanbe easily
received.
※Thepositionofthesecondhandisanindicationofthetimeuntiltheleapseconddatareceptionis
started.
(When the second handpointsto the 6-sec position, it meansthatthe reception will be started
approximately6seclater.)
※At this time, thesecondhand does not move at 1-secintervals,however, it does not meana
failure.
Thesecondhand moves inthe same manner asthe manual time adjustmentduring the leap
seconddatareception.
Whentheleapseconddatareceptioniscompleted,afterthereceptionresultisdisplayed,the
secondhandstartsmovingat1-secintervals.
Theindicatorhandalsoreturnstodisplaythechargingstatus.Usethewatchasitis.
※Theleapseconddatareceptionisperformedeveryhalfayearregardlessofleapsecondaddition.
Receptionofleapseconddata
2-secintervalmovement/5-secintervalmovementarebroughtabout
Leapsecond(Automaticleapsecondreceptionfunction) Energydepletionforewarningfunction(Secondhandmovementandwatchstate)
Whentheenergystoredinthewatchrunslow,theenergydepletionforewarningfunctionwillwork.
Whentheenergystoredinthewatchrunslow,chargethewatchbyexposetolight.
※Whentheenergydepletionforewarningfunctionworks,thewatchdoesnotoperateevenwithoperationofthebuttonsandcrown.
 (Beassuredthatitdoesnotmeanafailure)
Movementofthesecondhandshowsthestateofthewatch(workingfunctions).
2-secintervalmovement 5-secintervalmovement
State
Thesecondhandmovesat2-secintervals. Thesecondhandmovesat5-secintervals.
Restrictionon
function/display
・Receptionisnotstartedevenwithoperationof
GPSsignalreception.
・Automatictimeadjustmentdoesnotwork.
・Thehourhand,minutehand,date,andsub-dial
stop.
・Receptionisnotstartedevenwithoperationof
GPSsignalreception.
・Automatictimeadjustmentdoesnotwork.
Solution
①First,chargethewatchbyexposetolightuntil
thesecondhandmovesat1-secintervals.
②Keepinmindto charge thewatch until the
indicatorhandpoints to thelevel position
(middle) orF(full).  (Ifthe indicator hand
pointstoE,GPSsignalscannotbereceived.)
①Chargethewatchuntiltheindicatorhand
pointstothelevelposition(middle)orF
(full).
②Carryouttimezone adjustment toset the
time.
Continuedonthefollowingpage

Seiko ASTRON Specifications

Frequency

frequency of crystal oscillator	32, 768 Hz
loss/gain (monthly rate)	±15 seconds

Operating Environment

operational temperature range	−10°C to +60°C
normal temperature range	5°C to 35°C

Power

power source	Secondary battery, 1 piece
duration of operation (fully charged)	Approximately 6 months
duration of operation (power save activated)	Approximately 2 years