Sentry Industries CA656 User's Manual
Contents
1. Used to obtain the standard deviation of the population of data cash M Memory plus DATA CD key M Used to add the number being displayed or a calculated result to ihe contents of ihe memory When subtracting number from the memory depress the F and IM koys in this ordar When tho statistical mode is sot Used to onter the data numbers Used fo corect the mia entry delete function HECHA Chango sign key Changes the sign of the number displayed from a positive to e negative or vice versa Examplo 5 CH Decimal polnt random number key 12 3 Bae or 21M These keys sre used 1o generate unliorm rangom numbere from 0 000 to 0 999 Exampte Note Randam number generation is not possible when binary octal hexadecimal system mode is set Equals percent key x i Gompletes four srithmetic calculations gt t FF and complex number calculations wat E Used for the percentage calculation and add on discount Calcula tion Eee 6DISPLAY Eee 1 Display format S 7234561890 Floating decimal system notmal display 2ndF am m ef y 5 5 7 8 g 9 Scientific notation system E a Mantiasa Exponent 2 Symbols Minus symbol Indicates thatthe number in the display following the isa nega tive oO Memory symbol Appears when a number ls stored in the memory Er Error symbol Appears when an overtiow af an error is d2. tor the mamory Statistical program will be activated When the calculator Is set to the statistical calculation modo through these keys the symbol ETN appears and at the same time the numerical values and calculation commands except for memory contents are cleared Meanwhile In the Statistical calculation mode the Rw and W keys work as tho X and wm koys respectivoly And pushing thase key immediately aftar tho e key they work asthe Fx Es G 3 and Ep keys a ana 2nd function designation key fen Degree Radian Grad selector angular unit conversion key Used for calculation of trigonomatric Inverse trigonometric and coordinate conversion The oma key changes the angular moda a m gt DEG P RAD P GRAD Ex DEG GRAD Dopruss the Gea koy twice DEG modo Entrias and answars aro in decimal degreas RAO mode Entries and answers are in radians GRAD mode Entries ang answers are in grads z 1009 90 it has the function of the Dan key as woll as converting the displayed number into a numbor of the spectified angular Moda Hyperbolic archyperbollo key Trigonomotric inverse trigonmetric function koy Display format exchange Tabulstion key When a calculation result is displayedin the tloating decimal point aystem depressing the key displays the result In the scientific natation system Pushing the key once more displ
3. V SENTRY CA656 Scientific Calculator Deer Customer Thank you very much for purchasing our electronic calculator To fully utilize its features no spacial training is required but we suggest you study this operation manual to become familiar with its many abilities To help ensure its longevity do not touch the inside of the calculator avoid hard knocks and unduly strong key pressing Extreme cold BELOW 32 or 0 C heat above 104 F or 40 C and humidity may also affect the functions of the calculator Never use volatile fluid such as lacquer thinner benzine etc when cleaning the unit FOR servicing contact your retailer or nearby dealer Before starting calculation be sure to press the Onc key and to confirm that O is shown In the display Special care should be taken not to damage the unit by bending or dropping For example do not carry It In your hip pocket MES THE KEYBOARD on Os oy in S Om Ow a Op Of nt ce EEE OPERATING CONTROLS ay lore Powor off key When this key is depressed the calculator is tumed off Automatic Power Off Function A P 0 This calculator is automatically turned off approximately 8 minutes after the last key operation to sava the batteries Power on and clear etatistical calculation mode key Push this key to turn the calculator on It is ready for operation When pushed during operation it clears the calculator except
4. ays the result in the floating decimal point system again a TAR To sepalty the numbor of decimal digits in the calculation result Clear entry Factorial key CE Used to cloar an incorrectly ontered number 123 456 CE 456 679 ma MI Calculates the factorial of the displayed number Factorial of n nip n m 1 n 2 291 Ole Degree minute second Decimal degrees conversion hexadectmal number key To convert degree einutessscond to decimal degres za and vice versa 0 Hexadecimal number D key effective only in hexadecimal number mode HEX mode Go os Natural logarithm antiiogarithm and hexadecimalnumber key a in Used to obtain the logarithm base 6 2 718281828 Calculates the antilogarithm basee of the displayed numb x 4 HEX mode Hesadecimal number E key kA Common logarithm antiiogariihm and hexadecimal number key Toa Used to obtain the logarithm with the base of 10 S 10 Calculates the antilogarithm with the baso of 10 HEX mode Hosadecimal number F key E rie Real number ontor coordinate conversion key a This is used when the real parts of complex numbers are to be input and when identifying the real parts of calculation results This is used during coordinate conversions when the X coordinate of the Rectangular coordinates X Y le input or when the r of the polar coordinates r 6 ts Input it is also used for identif
5. hen the statistical mode is sat ni Displays the number at samples entered in me Tx Usog to obtain the sum ot the data IX w Numeral keys Used to ontor numbers swn Division binary number modo kay Deprossod for division ana Used 10 301 the binary system mode Converts the number displayed into a number In base 2 ost E amp Multiplication octelmumber mode key IX Depressed for multiplication e n Used to set the octal systom modo Converts the number displayed into a number in base 8 Minusshexadecimal aumber mode key Depressad ior subtraction Used to set the hexadecimalayatem mode Converts the number displayed into a namber in base 16 Pius decimal number mode key Deproesed for addition Used to set the decimal system mode normal mode Converts the number displayed into number In base 10 Memory in statistical calculation koy fw Clears the numberia the memory then stores the number being displayed in the memory To clear the memory doprass the a key When the statistical mode Is set Used to obtain the mean value of the data r Used to obtain the sum of squares of dats BX key followed by the Receli momory statistioal calculation koy RM Displays the contents of the memory The contents of the memory remain unchanged after this key operation When the statistical mode ia aet l5 Used to obtain the standard deviation of the sample of data
6. oteated 2ndF 2nd function designation symbol Appaars whan the 2nd function js designates HYP Hyperbolic function designation symbol Appears when hyperbolic function is designated DEG Degree mode symbol Appears whenthe degras mode is designated or shows that the angular mode of the converted result le in degree RAD Radian mode symbol Appears when the radian mode is designated or shows that the angular mode of the converted result is in radian GRAD Grad mode symbol Appears when the grad mode is designated or shows that the angular mode of the converted result is in grad Parenthesis symbol Appears whan a calculation with parenthesis is performed by depressing the lt Key GO Appenrs whan tho binary system mode la aot or shows the displayed number is a binary number CLAS Appears whon the octal system mode is set or shows tho dispinyed number is an octal number CEJ Appears when the hexadecimal system mode is set or shows the dis played number is a hexadecimal number 3 Appears when the complex number mode Is Em 3 Display system This machine displaya a calculation result X if itis within tha following range Inthe floating decimal point syatem 9 000000004 X 9999999999 t Appears when the statistical celoulation mode is set And otherwise the machine displays x in the scelentific notation system However a calculation result within the above range is also capable of being displayed in the scien
7. tific notation system by pressing the FE key Example rx E 0 055555558 The 10th decimal pla 5555555 02 The 10th docimal piace of tho man tissa is rounded is rounded O 055555556 cA 0 055655556 This is determined by the calcullator in the form of 6 666556655566x 10 Rounding the 11ih digit of the man tissa results in 5 555555556 x 10 When changed to the floating decimal Gisplay the rounded parts may not ba displayed asin this example EES BATTERY REPLACEMENT ME If the display becomes dark or dim replace the batteries with new ones according to tha following procedure Battery Function on 2pcs AAIN1 5V 1 Turn off the calculator 2 Remove the back cover 3 Replaces the batteries see forjcorrect battery replacement 4 Push In the back cover 5 After the replacement prosz the OFF the calculator When the batteries are correctly installed DEGO will be displayed If the display shows nothing ora meaningless symbol of the keys become inoperative remove the batteries and install them again Press OFF and jowe Keys In this arder and check the display agein and ONC keys in this order to clear Note wipe off the surface of the new batteries with dry clath and then install the batteri Always replace both of the batteries at the samo time
8. ying the calculated values of X or r j Converts rectangular coordinate into polar coordinate T ry number enter ooordinate conversion key E bi This is used when tho imaginary parts of complex numbers ere to be Input and when identifying the imaginary parte ofthe calculation results This is used during coordinate conversions when the Y coordinate of the Rectangular coordinates X is Input or when the of the polar coordinates r is input It is also used for identifying the calculated values of Y or 8 gt Example Key in Dispiay_ a 123 45 12346 s xr 24 S 5 00 3s 5 38 ea Hs Used fo set tha complex number mode TA Enter exponent p and hexadecimal number key To enter number in scientific notation The constant E A 3 141592654 is entered HEX mode Hexadecimal number A key HEX made Hexadecimal number 8 key Square root cube root and hexadecimal number key Calculates the square root of the number displayed we Posi Calculates the cube root of the number displayed el HEX mode Hexadecimal number C key T Square reciprocal key Calculates a square of the number displayed Calculates the reciprocal of the number dispinyod Used to exchange the number being displayed with the number stored In the working register x y nex amp Ch Close parenthests statistical calculation key Di Used to close parenthesis W
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