InstallationandOperatingManual
LCD‐Thermometer/ClockS No.1253
The3‐foldthermometerwithcrystalclockispurpose‐buildforthemountingincaravans,boatsand
interventionvehicles.
Pleasereadthemountinginstructionsandoperatingmanualincludingthesafety
regulationscompletelypriortostartingconnectionandstart‐up.
TheVOTRONICLCD‐Thermometer/ClockSisequippedwithalargeLCdisplay,whichensuresverygood
legibility,evenfromadistance.Theintegratedbackgroundilluminationguaranteesahigh‐contrast
representation,evenwithunfavourablelightingconditions.
Thethermometermeasuresnotonlytheroomtemperature,butalsotheoutsidetemperatureismeasuredby
thesuppliedexternaltemperaturesensor.Thethirdmeasuringinputcanbeusedforcontrolofrefrigerator
boxesorheatboxes.Thethirdtemperaturesensorisseparatelyavailableasaccessory.Themeasuringranges
cover‐30°Cto+70°Cwitharesolutionof0.1°C.
Theprecisecrystalclockshowsminutesandhours(24hoursformat),aflashingcolonforoperationalcheckand
theweekdayinthelowerrow.Theclockisequippedwithapowerreserve.Thus,itcontinuesworkingalsoata
short‐timevoltageloss.TheDCFmodule(orderNo.2062),whichisavailableasaccessory,allowsradio‐
controlledoperation.
Theunitdistinguishedbylowcurrentconsumption,anditissuitablefor12Vaswellas24Vboardmains
supply.
Forfire‐fightingvehiclesandinterventionvehiclesthesecondmeasuringinputcanbeusedforautomatic
activationoftheclockandofitsillumination.
AppearanceanddimensionsofthedisplayareperfectlyadaptedtotheVOTRONICmodularsystem.The
VOTRONICmodularsystemincludestankdisplayunits(freshandsewagewateraswellasfeces),theLCDseries
(solarcomputer,batterycomputer,ammeterandvoltmeter),aswellasswitchandfusepanels.
InstallationandConnection:
ChooseawellvisibleandeasilyaccessiblelocationinthelivingareaforinstallationoftheLCDthermometer/
clock.Directsunradiationshouldbeavoided,sincethebuilt‐intemperaturesensormightheatupstrongly,and
ameasurementoftheroomtemperaturebythemoduleisnotpossibleanylonger.
Therearcutoutopeningshouldbecoveredwithelectricallynonconductingmaterialtoensureefficient
protectionoftheelectronicsystemandfullutilizationofthestoragespace,whichmightbelocatedbehind.
Installationplacefortheexternalmeasuringsensor:
Iftheexternalsensorshallbeusedasoutsidetemperaturesensor,directsunradiationorheatradiationonthe
engineblock/enginecompartment/radiatorpreferablyshouldbeavoided.
Ifthemeasuringinput3isusedforcontroloftherefrigeratorboxorheatbox,theexternaltemperaturesensor
(requiredaccessory,orderNo.2001)shouldbeplacedataverageheightofthecontainer.
Terminals:
Connection+Batt.,‐Batt.
Thisconnectionisusedforthecurrentsupplytotheunit.The+Batt.cableistobeprotectedbymeansofa
fuse3A.Thecablecross‐sectionsshouldbe0.75mm²,atleast.
Sensorconnection
Thetemperaturesensorsareconnectedtotheconnections„–Sens.“and„+Sens1“,or„–Sens.“and„+Sens2“.
Thesensorsdonothaveadefinedpolarity.Forbetteridentification,werecommendtoconnecttheblackwire
to„–Sens.“andtheredwireto„+Sens.“.