Extech Instruments CTH10A User manual

USERMANUAL
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RadioControlledClockwith
Temperature&Humidity
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ModelCTH10A
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EXTECHINSTRUMENTS
2CTH10A‐en‐GB_V2.310/15
Introduction
ThankyouforselectingtheExtechModelCTH10ARadioControlledClockwithHygro‐
Thermometerdisplays.TheCTH10Aisareal‐timecalendarClock(12/24hour)thatalsodisplays
temperatureandrelativehumiditymeasurementstakenfromitsinternalenvironmentalsensors.
TheclockcanbesetmanuallyorautomaticallyusingtheRC‐WWVBtimesignal.TheCTH10A
includesanaudible/visibledailyalarmfunctionwith‘snooze’mode.
Thisdeviceisshippedfullytestedandcalibratedand,withproperuse,willprovideyearsof
reliableservice.Pleasevisitourwebsite(www.extech.com)tocheckforthelatestversionofthis
UserGuide,ProductUpdates,ProductRegistration,andCustomerSupport.
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MeterDescription
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A1:RC‐WWVBtimesignalIcon
A2:TimeDisplay
A3:Date
A4:DayofWeek
A5:IndoorHumidity
A6:IndoorTemperature
B1:‘Snooze’Button
B2:‘MODE/SET’Button
B3:‘+12/24’Button
B4:‘‐C/F’Button
B5:‘RESET’Button
B6:‘ALON/OFF’Button
C1:WallMountHole
C2:Batterycompartment
C3:TiltStand

EXTECHINSTRUMENTS
3CTH10A‐en‐GB_V2.310/15
Operation
GettingStarted
Opentherearbatterycompartment,insertthree(3)‘C’typebatteriesobservingcorrect
polarityandthencloseandsecurethecompartmentcover.PresstheResetbutton(usingthe
tipofapapercliporpin)inordertoinitializethemeter.
AutomaticTimeSetting
Afterinsertingthebatteriesandresettingtheunitasdescribedabove,theclock
automaticallyscansfortheWWVBtimesignalandtheicon flashesontheLCD.
flashes
Indicatingnowisreceiving
WWVBsignal
turnson
Indicatingsignalreceived
successfully
disappears,
Indicatingsignal
receptionfailed
TheclockautomaticallysynchronizeswiththeWWVBradiosignaleverydayat2amto
maintainaccuratetime.Ifsynchronizationwiththesignalfails,thesignalicondisappears;
theclockthenattemptstosynchronizewiththeWWVBsignalat3,4,and5am.
Theclockcanbesettoscanthetimesignalmanuallybyholdingthe button(B4)for3
seconds.Note:Ifamanualscanisattemptedwiththesignaliconshowing,thesignaliconwill
disappearandthemanualscanwillhavetobeattemptedagain.Eachreceptiontakesabout
5minutes.Ifreceptionfails,scanningstopsandthesignalicondisappears;thescanthen
repeatsonthenextfullhour(e.g.ifascanfailedat8:20amascanwillbetriedagainat9am).
Stopscanningbyholding“”button(B4)for3seconds.
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Note:ButtonswillnotfunctionwhilescanningfortheWWVBtimesignal.
ManualTimeSetting
Inthetimedisplaymode,holdthe“MODE”button(B2)for3secondstoenterthe
Clock/CalendarsettingMode.
Press“+”(B3)or“‐”(B4)buttontoadjustthesettingandpressthe“MODE”button(B2)to
confirmeachsettingandmovetothenextsetting.
Thesettingsequenceisasfollows:Hour,Minute,Second,Year,Month/Daysequence,
Month,Day,DST.
Notes:
1. Allsettingmodeswillautomaticallyexitafter15secondsofinactivity.
2. Pressandholdtheplusorminusbuttonforfasterscrollingofdigitswhileediting.
3. ForTimeZones:Thedefaultsettingiszone“P”.Hold“+”(B2)buttonfor3secondstochange
toanotherzone“P”“M”“C”or“E”Pacific,Mountain,Central,andEastern.
4. DST:WhentheDSTfunctionisactivated(DaylightSavingMode)“DST”willbeshownonthe
LCD.Set‘DST’asdescribedintheManualTimeSettingsectionabove.
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EXTECHINSTRUMENTS
4CTH10A‐en‐GB_V2.310/15
DailyAlarmSetting
Press“MODE”button(B2)toviewtheAlarmTime,“AL”isshownonthedisplay.
WhenviewingtheAlarmTime,hold“MODE”button(B2)for3secondstoenterthe
AlarmTimesettingmode.Press“+”(B3)or“‐”(B4)buttontoadjustthealarmtime.Press
the“MODE”button(B2)toconfirmthesettingandmovetothenextsetting.
Press“ALON/OFF”Button(B6)toactivateordeactivatethealarm.Ifthealarmison,the
alarmicon""appearsonthedisplay.
SnoozeAlarm
Pressthe“SNOOZE”(B1)buttonwhenthealarmtonesounds.Thealarmsnoozesfor
approx.5minutes,afterwhichtimeitalertsagain.“”flashesontheLCDduringthe
snoozetime.Thisprocesscanberepeated7times.
Exceptforthe“SNOOZE”button,anybuttoncanbepressedtostopthesnoozealarm.
Otherwise,thealarmsignalsoundsfor2minutes,thenstopsautomatically.
12/24HourDisplayMode
Pressthe“12/24”(B3)buttontoselectthe12or24hourmode.
ThermometerandRelativeHumidityDisplays
TheCTH10Aincludesinternaltemperatureandrelativehumiditysensors.Temperature
andrelativehumiditymeasurementsaredisplayedonthelowerrightsideoftheclock.
Pressthe“°C/°F”(B4)buttontoselectC:CelsiusorF:Fahrenheitunits.
Ifthetemperatureexceedsthemeasurablerange,LL.L(beyondtheminimum
temperature)orHH.H(beyondthemaximumtemperature)willbeshownontheLCD.
ImportantNotes
Theclocklosestimeinformationwhenthebatteriesareremoved.
DonotexposetheClocktodirectsunlight,extremetemperatures,orhighhumidity
Nevercleanthedeviceusingabrasiveorcorrosivematerialsorproducts.Useadamp
clothtowipethehousingcleanasnecessary.

EXTECHINSTRUMENTS
5CTH10A‐en‐GB_V2.310/15
BatteryReplacement
WhentheClocknolongerdisplaysdigitsandtextpleasereplacethebatteries.Opentherear
batterycompartment,insertthree(3)‘C’typebatteriesobservingcorrectpolarityandthenclose
andsecurethecompartmentcover.PresstheResetbutton(usingthetipofapapercliporpin)
inordertoinitializethemeter.
Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.
Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriatecollectionsites,
theretailstorewherethebatterieswerepurchased,orwhereverbatteriesaresold.
Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuserisobligatedtotakeend‐of‐life
devicestoadesignatedcollectionpointforthedisposalofelectricalandelectronicequipment.
Specifications
DisplayExtra‐largemulti‐functionLCD
CalendarClock  Real‐timecalendarclock(uptoyear2069)
TimesignaldetectorRC‐WWVBradiosignalautomaticallysetsthetime(clock
timemayalsobemanuallyset)
TemperatureMeasurementrange0~50oC(32~122oF)
StorageTemperature ‐20~60oC(‐4~140oF)
TemperatureResolution 0.1oCoroF
TemperatureAccuracy ±1.5°C(±3°F):‐5°Cto0°C(23°Fto32°F)
±1°C(±2°F):1°Cto30°C(33°Fto86°F)
±3°F(±1.5°C):31°Cto50°C(87°Fto122°F)
Over‐rangetemp.indicationHH.Hdisplay
Under‐rangetemp.indicationLL.Ldisplay
R.H.Measurementrange 20~99%RelativeHumidity
R.HAccuracy  20%to40%RH:±8%RH(@25°C)
41%to70%RH:±6%RH(@25°C)
71%to90%RH:±8%RH(@25°C) 
Powersupply  Three(3)‘C’typebatteries
Dimensions  29x43x3.8cm(11.4x17x1.5in.)
Weight1.25kg(2.75lbs.)
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Copyright©2015FLIRSystems,Inc.
Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform
ISO‐9001Certified
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