Model:30SGeneral:Name:Scientific CalculatorCode-Name:AstroFamily:?Logic:expressionFeatures:scientific, hyperbolic, fractionsFirsts:swappable keyboard colorsIntroduction:Date:1999-04-01 (also reported as 2000-04-13)Price:$14.95Discontinuation:Date:?Price:$15.99 as of 2003-01-31Production-Run:?Display:Type:LCDSize:top line 7x5 dot matrixbottom line 7 segmentNumber-Formats:sign,  10 mantissasign, 7 mantissa, ., exp sign, 2 exp?digits _ digits _| digits (fractions)?digits .o digits ' digits " (D.MS)Annunciators:2nd2nd key pressedMODEmode selection activeSTATstatistics mode activeENGengineering notationSCIscientific notationDEGdegrees modeRADradians modeGRADgrads modeFIXfixed decimal modeHYPHYP key pressedLSOLVlinear equation solver activeQSOLVquadratic equation solver active<- ->digits to the left or right of display^ vearlier or later resultsMnon-zero number in memory-result is negative, or entry line fullKa constant expression can bedefined or usedx10result is displayed in engineeringor scientific notation; exponentdisplayed above indicator,thousands separatorData:User-Visible:Smallest:1E-99Largest:9.999999999E99Signif.-Digits:10Internal:Smallest:1E-99Largest:9.99999999999E99Signif.-Digits:12Data-Types-and-Sizes:real, 8 bytesMemory:Named-Registers:A, B, C, D, EQN, X, Y, X1, X2, Y1, Y2Flags:noneRegister-Usage:noneNumbered-Registers:noneProgram-Steps:noneProgram-Editing:noneProgram-Display:noneUser-RAM-Bytes:80Total-RAM-Bytes:?ROM-Bytes:?Machine-State:memory,deg/rad/graddisplay moderegular, statistics, linear eq, quadratic eqFile-Types:nonePhysical:Technology-Used:?Processor:?Chip-Count:?Power-Source:2, LR-44 cellsContinuous-Memory:yesExpansion-Ports:noneI/O-Ports:noneClock:none (auto power off, though)Length:155mmWidth:81mmHeight:13.8mmWeight:135gTemperature-Range:Operating:? to 4? deg CCharging:? to ? deg CStorage:? to ? deg CKeyboard:Switches:noneShift-Keys:MODE, purple, above left2nd, yellow, mid leftUser-Defined-Keys:noneKey-Arrangement::***        ******        ***** ** ** ** **** ** ** ** **** ** ** ** **** ** ** ** **** ** ** ** **** ** ** ** ***** *** *** **Key-Labels-Base-Keyboard::MODE^ON (red key)2nd<>CONSTvDATASTATVARDRGa b/cDELVRCLloglnPRBCONVSTOsincostanCL\v/x^2()\:-+/-789xE456-MRC123+M+0.\piENTERKey-Labels-2nd-yellow-above::[]OFF[][]DMSR<>PSCI/ENGa b/c<> d/cINSCL-VAR10^xe^xF<>DFIXRCLsin-1cos-1tan-1CL-EQNx\v/x^-1>Y>X,hyp[][][]%CHGy^x[][][]%K[][][]ANSM-RESETRND[]=Programmable-Operations::noneNon-Programmable-Operations::%percent of%CHGenter "%CHG()"(start nesting)end nesting+addition+/-change sign-subtraction,separate arguments0-9, .enter digit or decimal point10^xenters "10^()"2ndprefix=enter an = sign>Xenter X>Yenter Ya b/cfraction entry: 4 2/3 is entered 4 AB/C 2 AB/C 3a b/c<>d/cconvert between proper and improper fractionANSrecall last answer into entry lineCLclears entry line, error message, or menuCL-EQNclears EQNCL-VARclears all variables except EQNCONSTenter constantCONVunit conversion, enter value, CONV, selected from unit,ENTER, select to unit and view conversion, then ENTERcosenters "cos()"cos-1enters "cos-1()"DATAenter statistics dataDELdelete characterDMSDMS conversionDRGmenuEstart an exponente^xenters "e^x()"ENTERcomplete expression and evaluateF<>Dconvert between fraction and decimal displayFIXsets fixed display mode (choose among "F0123456789")hypprefix for hyperbolic functionsINStoggles insert modeKstarts defining a sequence of operators and constants thatare added to the expression each time the ENTER key is pressedlnenters "ln()"logenters "log()"M+add X to memoryM-subtrack X from memoryMODEcycles among modesMRCrecall extra memory; pressing it twice clears memoryOFFoffONturns calculator onPRBmenuR<>PmenuRCLrecalls value of variableRESETresets all settings to factory defaultRNDrounds number to match displaySCI/ENGmenusinenters "sin()"sin-1enters "sin-1()"STATVARanalyze statisticsSTOstores X into variable (EQN can hold expressions with thevariables A, B, C, or D)tanenters "tan()"tan-1enters "tan-1()"VRCLrecalls name of variablexmultiplicationx\v/enters "x\v/()"x^-1enters "-1" as a powerx^2enters "2" as a powery^xpower\:-division\piPI\v/enters "\v/()"StatisticsMODE1select: 1-VAR2-VARCLR-DATADATA*enter xpress v (down arrow)enter frequency (1-VAR) or y (2-VAR)press v (down arrow)repeat from * until doneto analyze, pressSTATVARpress > (right arrow) to scroll through resultspress ENTER to use a resultin 2-VAR, to predict a value for X or Y,select X' or Y'ENTERenter valueENTERnnumber of valusex-,y-mean of x or ySx,Sysample standard deviation\Gsx,\Gsypopulation standard deviation\GSx,\GSysum of all values\GSx^2,\GSy^2sum of squares of all values\GSxysum of products of dataalinear regression y interceptblinear regression slopercorrelaion coefficientx'predicted xy'predicted yLinear SolverMODE2enter first equation, using >X and >Y for X and Y using eitherform: ax+by=c or y=mx+b (presumably storing m in A),enter the second equationENTERview X>view Yresults are also stored in X and YQuadratic SolverMODE3enter the equation as Ax^2 + Bx + C = 0 or Ay^2 + By + C = 0ENTERview first root>view second rootroots are also stored in X1/Y1 and X2/Y2Special KeysM+ and CONST together: force on, may also force resetRESET, then hold down 2nd, +/-, and DEL: does self-test1)Ddisplay, end with DRG2)Kkeyboard, end with ???Menus::CONST:cgGVmNaemfemp...mnRhkcspeed of lightgaccelleration of gravityGgravitational constantVmmolar volume of ideal gasNaAvogadro's numbereelementary chargemeeletron massmpproton massmnneutron massRmolar gas constanthPlank's constantkBoltzmann's constantCONV:inchcmmmmilfeetmyardmilekmfeet^2m^2yard^2mile^2km^2acreshectareslbkgTr.ozozPoundgdegFdegCgallonliterB.galPintfl.ozCalkJatmkPammHgcmH2ODMS:deg'"rg>DMSDRG:DEGRADGRADMODE:0)HOME1)STAT2)L SOLV3)Q SOLV0 home1 statistics2 linear equations3 quadratic equationsPRB:nPrnCr!RANDMRANDMIR<>P:R>PrR>P\GtP>RxP>RyRCL:ABCDX1X2XY...Y1Y2SCI/ENG:FLOSCIENGSTO:ABCDX1X2XY...Y1Y2EQNVRCL:ABCDX1X2XY...Y1Y2EQNBugs/ROM-Versions::Square root is only accurate to 12 digits.  To fix, compute the averageof square root(x) and x/square root(x).Internal calculations use 24 digits.Reported by Ralf Fritzsch (Fritzsch@Hamburg.BAW.DE) of Hamburg, Germany,Key in 1 [a b/c] 110 to put in 1/110 as a fraction via the [ab/c] key.  The result is: 0/1.Notes::Introduced at the National Council of Teachers of Mathematics.It competes directly with Casio fx-83 and fx-85.Comes with three key overlays (gray, translucent blue, solid purple).There are five others available as an option (solid blue, translucentred, trsnslucent blue, translucent green, and transclucentpurple).  Australian kids picked the colors (and names).The HP F1908A is apparently only available in Australia.Has a sliding hard cover like the 38G.Half the keys bring up menus, which allows for a lot of functions in asmall package.  However, some of the menus set modes, some pickvariables, and some just list operations.  Tracking which are whichcan give one a headache.Manufactured by Kinpo (http://www.kinpo.com.tw).  It is a modified SR18.From a private e-mail:...Also, I strongly believe the HP30S is made by Kinpo. When Iopen it up, I find "SR18" inside on the PCB and casehalves. But, there is no SR18 on the Kinpo web site, andnothing that looks like it on the Citizen web site.However, I recently purchased a Datexx DS-834 scientificcalculator.http://my.datexx.com/consumer/productinfo.html?p=DS-834It appears to be a Citizen/Kinpo SR-19S1 ("SR-19S1" is etchedon the PCB):http://www.kinpo.com.tw/English/Calculator.htm#sr19s1Besides the general feel and appearance, what really convincesme that the HP30S is made by Kinpo is that the self test forthe Datexx DS-834 is almost identical to the HP-30S. The onlydifference is that a third option is added that loops througha display contrast test. Here is my HP30S self-testdocumentation:http://www.rskey.org/~mwsebastian/selftest/hp_test.htm#hp30sCompare it to the Datexx DS-834 self-test:http://www.rskey.org/~mwsebastian/selftest/datexx_test.htm#ds834...