Transcription of Your CURTA Calculator
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Your CURTA Calculator
YourCURTAC alculatorPage1 YourCURTAC alculatorisahigh-qualityprecisioninstrum ent,fittedwithautomaticsafetylockstoprev entoperator ,toobtainbestresultsandefficientservicef romyourmachine, ;allyouhavetodoistofollow,stepbystepandi nthesequencesetout, ,it (8x6x11digits)andCURTA modelII(11x8x15digits).Thesetwomodelsbei ngidenticalbutfortheircapacity, ,holdthemachineinyourlefthand,withthumba ndforefingergrippingtheupperknurledringa ndthebaseofthemachinerestinginthepalmofy ourhand(seepictureonpage1).Page42 TheClearingLeverWhenpulledoutasindicated bythearrow, , TheOperatingHandleTurnthehandleclockwise only (showingawhiteorredsleeveatitsbase)forsu btractive(minus)turns,orpusheddownagaini nitslowerornormalpositionforadditive(plu s) (plusturns)andalsopulledoutinitsupperpos ition(minusturns).Tofinishdon Thecarriageistheupperknurledringofthemac hinewhichyougripwiththumbandforefinger(s eepictureatleft).Thewhitearrowonthefront ofthemachineindicatesthepositionsoftheca rriage, ,makesurethehandleisinitszerostoppositio n,raisethecarriagestraightupward, ,learntomovethecarriageonlywiththumbandf orefingerofyourlefthand(inwhichyouholdth emachine):Startingfromposition1movetheca rriagetopositions2,3,4,5, ,theyareintheirzeroposition, ,anynumberfrom1 ,eachdigitissetwithoneoftheknobs, :Withthethumbofthelefthandortheforefinge roftherighthandpullknob1rightdownuntilth e9appearsinthedialslotabove;withknob2set the 4 andwithknob3the 1.
Page 3 How to Operate your CURTA 1 – The Container To open turn the lid clockwise. Remove the machine. When operating, hold the machine in your left hand, with thumb and forefinger gripping the upper knurled
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