Extech Instruments CTH10A User Manual

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.

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.


Extech Instruments CTH10A Specifications

Temperature Measurement

temperature measurement range	0~50°C (32~122°F)
storage temperature	‐20~60°C (‐4~140°F)
temperature resolution	0.1°C or °F
temperature accuracy ‐5°C to 0°C	±1.5°C (±3°F)
temperature accuracy 1°C to 30°C	±1°C (±2°F)
temperature accuracy 31°C to 50°C	±3°F (±1.5°C)

Humidity Measurement

r.h. measurement range	20~99% Relative Humidity
r.h. accuracy 20% to 40% RH	±8% RH (@25°C)
r.h. accuracy 41% to 70% RH	±6% RH (@25°C)
r.h. accuracy 71% to 90% RH	±8% RH (@25°C)

Power

power supply	Three (3) ‘C’ type batteries

Weight and Dimensions

dimensions	29 x 43 x 3.8 cm (11.4 x 17 x 1.5 in.)
weight	1.25 kg (2.75 lbs.)