commodore Models SR8120D SR8140D SR890D Scientific Electronic Calculators
Owners Manual 1 TABLE OF CONTENTS
Description Page
Keyboard Layout 4 Key Index 5 Introduction 6 Display Description 8 Data Entry 9 Clear Key 9 Four Function Arithmetic 10 Chain Calculations 10 Correcting Operations 11 F Key 12 Using the Memory 13 Chain Calculations Using the Memory 14 Exponent Key 15 Power and Rool Keys 16 Chain Calculations Involving Power Key 16 Binary to Decimal Conversion 17 Amorlization Using Power and Memory 18 Hypotenuse Calculations 19
-... 1- - - Description Page Description Page
Radius Calculation s Using Pi 20 Appendix 0 Transcendental Functions 21 Service Information Trigonometric Functions 24 a. Low Power 31 Degree Mode 24 b. Shipping Instructions 31 Ra dian Mode 25 c. Temperature Parameters 31 Radian Conversion 26 Appendix E Guarantee 32 Sales and Service Centers 33 Appendix A Improper Operation 27 Over/low 27 Underflow 27 Appendix B Operating Accuracy 28
Appendix C Power a. AC Operalion 29 b. Battery Operation 29 c. Adapter Data 30
2 3 ,------, KEYBOARD KEY INDEX
This index permits quick page location of the description and/or the fi rst use of each function key.
C 9 16 + / - 10 x 10 20 = 10 10' ex 10 21 + lID Oi 11 10' 21 e._ 11 sin-I COS-I tan-1 12 21 G •••• 13 .. 13 " " 24 13 13 24 sin-1 24
STO 2 15 24 80000 16 cos-' 24
00000 24 tan-' 24
5 r INTR ODUCTION Thank you for selecting our new scientilic They have been designed to give you a thor calculator. ough understanding of all functions. Profici· ency is gained by practice. Once you discover II represents the finesl achievement in solid how easy your mini-computer is to operate, state large scale integrated/ metal oxide silicon it will become an essential, enjoyable aid to technology, you in every area of computation. The commonsense logic of this scientific notation calculator is the key to your mastery o f it. You are able to enter basic assignments just as you would write them down on paper. A special note concerning display capacity For eJlample, 4 x 5:co ,is entered just as you and machine logic. see it. Higher math arguments Bfe accom This book has been prepared to illustrate the plished on your mini-computer by again enter operation 01 a 14-digit machine. ing examples as they Bfe commonly written. In the event you have selected a machine with Thus, the Log 019- the Log of 4 is inde)(ed: a 12- or 9-digit capacity, you are of course 9 l og-4 Log - . restricted to an entry limited by the number of digits in the mantissa and results will be This emphasis on academic principles is a lruncated in accordance with the capacity of consistent theme wh ich runs throughoullhe the display. This in no way alters the accuracy logic 01 your new mini-computer. of your machine as the extra digits are relained within the unit's logic for continued compu Students will appreciate the fact that most lal ion. Thus, you can work all o f the problems math concepts have been programmed into in this manual. the logic system. Among these basic tenets are such principles as any number raised to The treatment of numbers between +' and the zero power equals one; and zero raised - 1 differs among models. In all instances both entry and result are accurate. However, some to any power (except zero) equals zero. As can be seen, resul ts will be precisely dis models will express these values in scientific notation. played for immediate comprehension. Enter: Rea d: In short, our Scientific was designed by professionals for professionals and students Example A. .002 X 2. -03 alike. It has been developed as an easy-to understand, easy-to-operate machine. Please Example B. .002 X 0.002 read through the pages of this manual care fully. Become familiar with the keyboard and Bolh results are identical. its characteristics. Work through the examples.
6 7 NUMERICAL ENTRY sign of exponent: - or +, blank implies positive o through 9 • +/- EE exponent field: two digits maximum Sign El""n_" sample display: J~~~I~. Eo """ ... n l Entry: A number (the mantissa) is entered , just as written using the keys 0 Ihrough 9. (14 digits): 0.123456789 90 The sign of the mantissa can be entered at any time during a numerical enlry by pres (12 digits): 102.34578 99 sing the change sign key + /- . The sign (9 digits): 123.45 of the exponent can be Changg pressing .. the change sign key aUer the key sign mantissa: or + , blank on (enter exponent key) has been prm.ed. display implies a positive number The exponent lield is blank until I..:l.3I is mantissa: 10 digit maximum In 14·digit entered. display C 8 digit maximum in 12-digll The clear entry/ clear key. Pressing the display. C during or immediately aller a numer· 5-dlgit maximum In 9·digit ical entry will clear the display, Only prior display. entries are retained intact. Pressing the C key in all other cases clears your Special Ca se: A result between 1 and -1 calculator; Memories are not cleared. which has an exponent -01 is displayed in floating notation with a leading zero. This Enter: affects the display only. Th e logic 01 the calcu 2 3 4 = 6 lator realizes the true 10-digit result and the + c c ten digit accuracy Is retained in the machine. Cl n ' Enl'Y Enter: See Displayed: 2 3 0.666666666 = In the above example, we wished 10 add 2 Subsequent chain calculations wifl be com and 4 but entered 3 by mistake. Pressing puted using the true result retained internally C and entering 4 corrects the error in scientific notation: and allows further computation. The l inal 6.666666666 - 01 C clears the calculator.
8 9 FOUR FUNCTION ARITHMETIC Enter: Read: Explanation:
+ x + 2.4 The result of the division 12 + 5 is displayed and Example: divide is entered Enter: Read: Explanation: .3 0.3 Enter.3 3 + 1- x 3. Enter - 3 and multiply = 8, The result of 3 ; 4 + .3 1.2 m +1- 2 1.2 - 02 Enter 1.2 x 10- 2 which is 8 in display = - 0.036 Perform multipli cation and display result CORRECTING OPERATIONS Example: Calculate 3 x 4 CHAIN CALCULATIONS Example: Enter: Read: Explanation: 3x4 Calculate - 5- + .3 3 + 3. Enler 3. We wish to multiply but en tered + by mistake. EKplanatlon: Enter: Read: x 3. Enter the correct function key Enter 3 and multiply 3 x 3. 4 4. Now enter 4 4 4. Enter 4 = 12. The result 01 3 x 4 is displayed 12. The mu ltiplication 3 x 4 is In this manner any of the "four function" keys performed, the result, 12, (+ - can be over wrillen by another; Is displayed and divide is x -;-) entered. the final entry will be executed, For example:
5 5. Enter 5 Enter: Read: Elplanation:
3 x + 4 = - 1. The last lunclion pressed, (-) is executed. 10 11 I U,. oflh. D F,"";,, K"~ USING THE MEMORY Store: STO 2 Your mini-computer has 29 keys, one of which I!Z.!II is a special function key marked "F," The store keys refer to the two memory The application of this key enables you to registers and they store data for future use. increase the feature range of your machine by When mliII is pressed, the value currenlly releasing twelve additional operations. on the display will be copied into Memory Register 1. Similarly, when the iii key is Nine of the 29 keys are inscribed with upper ~as a prefix to the memory key case functions. If anyone of these keys is ~,the displayed data is copied into pressed the lower case function is executed. Memory Reg ister 2. Any data stored in the However, if the II key is indexed immediately register prior to pressing the respective STO prior 10 pressing one of the " double function" key will be lost. This is referred to as "writing keys, the upper case function is performed. over." Recall: mil and RCl2 Example: These keys are used to recall data stored in Enter: Read: Explanation: their associated memory registers. The value stored in memory is copied onto the a. 211 3 = 8. Ra ise 2 to the display; the value on display prior to recall third power. is lost while the value stored in memory is unaltered. To recall data in 5TO 2 ,Press b. C a13 \Iy 3= 2. Obtain the key sequence II RCl 2 . cube root of 8. Example:
Enter: Read : Explan ation:
5 5. Enter 5 mJI 5. Copies 5 into memory register 1 6 6. Enter 6 , 6 5T02 6. Copies6 into memory register 2
12 13 Enter: Read: Ellplanation: Enter: Read:
IIIDI 5. The content 01 Memory 1 (5) ® 3 + S +IimII= 18. is copied onto the display. Five remains in Memory 1. The value in Memory 1 (10) is added to 8 DRCL2 6. The content of Memory 2 (6) and the result is displayed. Memory 1 is copied onto the display. is unaffected. Six is retained in Memory 2.
3 x 5 x 4 -:- 6 = 5TO 2 10. Clear: o n
An individual mamory register can be cleared by entering the key sequences: The result of the calculation is displayed and stored in Memory 2 for future recall. C ~ Clears memory register 1.
C STO 2 Clears memory register 2. III 3 x 4 -:- II RCL 2 = 1.2 The C key need not be entered if O. is on the display. However, you must still press the The value stored in Memory 2 (10) is in appropriate storage entry keys to replace the cluded in the calculation and the result ellisting data with a zero value. Both memory is displayed. Memory 2 Is unaltered. registers are cleared at power on.
CHAtN CALCULATIONS USING MEMORY EXPONENT KEY Examples: m Enables entry of exponent values. Enter: Read : Enter: Read : Explanation: CD 3 x 5 x 4 -:- 6 = EiiII 10. , 5.5 IE 46 5.5 46 We have entered The result of the calculation (10) is dis 5.5 x 1()45 played and stored in Memory 1 for future recall.
14 15 l1li With tho power key, a number raised to any Enler: Read: Explanation: power (or root) can be calculated. The base ;ry is en tered first, then the power key, and 3 3. Enter 3, the power finatly the power (or root) to which the base is to be raised. Powers are calculated using + 3008. Calculate and display 3 (4)5 the formula y' = e ( ·l n ~ ) , VT= eC:~). - (4)3 enler add Therefore, negative bases are not per mitted. Any attempt to raise a negative base 4 = 3012. 3 (4)5 - (4) 3 + 4 = 3012. to a power witl resu1! in an error condition. In addition to performing all commonly en countered powers and rools accurately and quickly. your calculator will correclly per o Binary to det:imal conversion: form these calculations: DO = 1. XO = 1, (»< = 0 for x '" O. Convert the binary number 11011 to deci mal.1101 1 in base2isequal to24 + 23 + 2' + 20 in decimal.
t Enler: Read: Explanation: Whe re PV is the Principal (present value) 20000 .; 150. of the mortgage Calculate PV Enter divide I is the monthly interest expressed as a decimal n is the number of mon ths PMT is the monthly payment IiIil!I = 179.945191 The dollar amount necessary to amortize a $20,000 mOrlgage in 20 years at9% Enter: Read: annual interest .09 .;- 12 + 0.0075 Calculate the monthly interest @ Hypotenuse Calculations (g% for 12 months) = 1.0075 1'1 5 Calculate (1 + I) and enter it as the base 3 240 +1- - 240. 4 Enter the number of months, change the sign, calculate (I + I) -" and subtract 1 Given a right triangle, three meters on one side and four on the other, find the hypotenuse. The equation is: = +1- + 1 = 0.833587156 R = >IN + 82 A = side 1 8 = side 2 Find R, if A = 3and S = 4 Store 1 - (1 + 1)-" in memory " " Enter: Read: Explanation: Enter: Read: Explanation: 3V 3 1'1 3. Enter 3, the base III r, 511.842297 Enter 4::- as the base 2 2 + 9. Calculate & display 3 3 = 7.999178546 Calculate the cubic root of !~ and display 4 1'1 4. Enter 4. the base result 2 = 25. Calculale and display 32 + 42 The sphere has a radius of approximately D {;y 25. Enter 25 as the base 8 meters. 2 = 5 Calculate and display the second root of 25. TRANSCENDENTAL FUNCTIONS Example: Your scientific calculator will perform common o Find the ra dius of a sphere whose volume and natural (Naperian) logarithmic and inverse is 2144 cubic meters. logarithmic functions. It also calculates the three trigonometric functions and their in Equation: R = !;R R=radius V=Volume verses. Each of these keys operates on the '" value currenlly on display. Enter: Read: Explanation: Logarithmic Functions 2144 x 2144. Enter the Volume- log Calculates the common logarithm (log ,o) of x. multiply 10' Calculates the common antilogarithm of x. 3 6432. By 3 divide Calculates the natural logarithm (log.) 01 x. 4 + 1608. By 4 divide '0 Calculates the nalural antilogarithm of x. III , = 511.842297 By ::- " 20 , - Elamples: Enter: Read: Elplanal ion: Enter: Read : Elplanation: The above calculation demonstrates the equation In (a) + In (b) = In (ab) To calculate the hyperbolic arc tan of .5: 1.648721271 Calculate and dis· play the expenen· tial function of .5, e·5 and enter - @ Equation: arctanh X = 'h In (.!...:!:2. ) 1 - , .5 + /- iii e' 0.606530659 Calculate and dis· play the expenen· Enter: Read: Elplanation: tialel -.5 .5 = 0.5 Store (1 - .5) 1.042190611 Perform subtraction, in Memory 1 display result, and 1m! enter + 1 + .5 = 1.5 Calculate (t + .5), enter divide 2 = 0.521095305 Divide by 2 and dis play the result, the sinh of .5 22 23 Trigonometric Functions Enter: Rea d: Calculates sine 01 x. 120 120 -sin-I Calculates inverse sine 01 x. rm - 0.5 cor' 120 Calculates cosine 01 x. n 45 45. cos-I Calculates inverse cosine 01 x. 1m ,. Calculates tangent 01 x. IEIiI n tan-I 45 tan-I Calculates inverse tangent 01 x. Your calculator will find the sine, cosine, tangent, arc sine, arc cosine and arc tangent 01 any number on display in either degrees or Example: Radian Mode radians. The calculator is in diU; mode when turned on. Pressing th e • key shills your calculator to radian mode, lights a deci Enter: Read: Explanation: mal point in the exponent liald, end converts the value on display from degrees to radians. c mil II 0.523598775 Pressing I!1lI again sh ilts the calculator back to degree moqe and converts the display in • = degrees. 0.5 Input range for sine, cosine and tan gent is :!: 0-360" I Example: Degree Mode II sin- .523598775 enter ~ radian Rldlln Ent8f: Rea d: l~d lCl IOf 30 3ll. 0.5 [I sin-I 30 24 25 Conversion to radian APPENDIX A 26 27 APPENDIX B APPENDIX C OPERATING ACCURACY The precision of your calculator depends upon the operation being performed. Basic addition, Disposable Satlery Model (0) subtraction, multiplication, division and recipro Your ca lculator uses a standard nine·volt bat· cal assignments have a maximum error of :!: one count in the tenth or least significant digit. tery type 006P available at most drug, depart ment and camera stores. To operate, discon While countless computations may be performed nect the adaptor cord and turn power switch with complete accuracy, the accuracy limits of "ON"' (an interlocking sw itch in the AC socket particular operations depend upon the input will prevent battery use if the plug remains argument as shown below. connected). When 1M ballery weakens. display Mantissa Error will dim. Funclion Input Argument (Max.) ,", 1 count in D ,o log x 1 count in 0 '0 Experience has proven that batteries packed e' 3 counts in 0 '0 with machinll,. a911 considllrably. To protllct your calculator, we have omitted the battery Y' 1 count in D9 from the package. Please ask your dealer for a 0 fresh , new power ce ll. In the event your brand sin 4> 0° $ 14> 1$ 360 or 8 counts in 0'0 new machine does not function. please check 0 '::;; 4> 1$ 2;;- the battery firs\. Please nore, mactlines wirtl disposable 0 cos 4> 0 '::;;14> 1:$ 360° or 8 counls in 0 ," barreries will nor recharge. See ba/rery 0:;; 14> 1'::;; 2;;- replacement details above. to" . 0 :;; 4>1< 89 0 4 counts in O. 89° :$101>1:;; 89.95° 1 count in O. AC Adapter Operation 11 is recommended that you unsnap and reo sin-' x 10 -,o:$ I ~ I :;; 1 E< 5xl0-1 move the battery from your machine before inserting the adapter jack. cos- ' x 10-'0:;; 1"1:;; 1 E< 5xl0-1 tan-' x E< 5xl0 ' On=Nth display digit assuming a lett justified 10 digit result. APPENDIX C Use proper Commodore/CBM adapter for AC operation. Adapter 640 or 707 North America Adapter 708 England Adapter 709 West Germany 30 AP PENDIX E 5alesond Guarantee Service Your new electronic calculator carries a Centers parts and labor gua rantee for one year from date 01 purchase. We reser~e the right to repair a damaged component. replace it entirely. or. if necessary. Commodore Bu siness Machines, Inc. exchange your machine. 390 Reed Stree t, If you own a pOrlable calculator which uses Santa Clara, California 95050 an AC adapter, the adapter must be returned with your machine when service is required. Commodore Business Machines, (Canada) ltd. In order to receive free service under th is 946 Warden Avenue guarantee at a Commodore Service Center, Scarborough, Ontario you are required to pay all postage. shipping CaM Business Machines Limited and insurance charges when returning your E.aglescliffe Industrial Estate calculator to the Commodore Service Center Stockton on Tees and enclose a check or money order for $2.50 Cleveland County to cover handling charge. return postage and T5160PN Insur~nce Engl"",) This guarantee is valid only when a copy 01 your original sales slip or similar prOOf of pur I Commodore Buromaschinen GmbH chase accompanies your defective machine. 6079 Sprend lingen Th is guarantee applies only to the original Robert-Bosch-SIr. 12A owner. It does not cover damage or malfunc West Germany tions resulting from fire, accident, neglect, abuse or other causes beyond our control. Commodore Japan Lid. The guarantee does not cover the repair or Taisel-Denshi Bldg. replacement of plastiC housings or transform 6-14,lkue t-Chome ers damaged by the use of improper ~oltage. Asahi-Ku, Osaka 535 Nor does it cover the replacement of expend Commodore France S.A. able accessories and disposable bat!eries. Zone lndustriel le The guarantee will also be automatically Departmentale M 14 voided if your machine is repaired or tampered 06510 Carros, France with by any unauthorized person or agency. This guarantee supersedes. and is in lieu of, Commodore Switzerland S.A. all other guarantees whether expressed. or 8ahnhofstr 29-31, 2 Stock implied. Posllach 666, 5001 Aarau 33 - -- \