# Citizen SRP-265 Manual

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 SRP-265 Scientific Calculator BASIC DEFINITIONS ......................................................... 2 The Keys ....................................................................................... 2 GENERAL KEYS .............................................................................. 2 MEMORY KEYS ............................................................................... 2 SPECIAL KEYS ................................................................................ 3 UNIT CONVERSION KEY ................................................................ 4 FUNCTION KEYS............................................................................. 4 PROGRAMMING KEYS (USE IN THE PGM MODE ONLY) ............ 6 STATISTICAL KEYS (USE IN THE STAT MODE ONLY)................. 6 THE DISPLAY .................................................................... 7 ORDER OF OPERATIONS................................................. 8 ACCURACY AND CAPACITY............................................ 8 OVERFLOW / ERROR CONDITIONS ................................ 9 POWER SUPPLY ............................................................. 10 NORMAL CALCULATIONS ............................................. 10 Basic Calculation (Including Parenthesis Calculations).............. 10 Constant Calculations.................................................................. 10 Memory Calculations................................................................... 11 FUNCTION CALCULATIONS........................................... 11 Sexagesimal ↔ Decimal conversion ........................................... 11 Fraction Calculation..................................................................... 12 Trigonometric / Inverse – Tri. Functions ...................................... 12 Hyperbolic Functions and Inverse – Hyp. Functions.................... 12 Common And Natural Logarithms / Exponentiations................... 12 Power, Root, Reciprocals, Factorials........................................... 13 Unit Conversion........................................................................... 13 Physics Constants....................................................................... 14 STANDARD DEVIATIONS ............................................... 14 PROGRAMMING .............................................................. 15

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BASIC DEFINITIONS

The Keys

To keep your calculators as compact as possible, some keys have more than one function. You can change the function of a key by pressing another key first, or by setting the calculator in a certain mode.

The following pages give you more detailed explanation of each key’s use and function.

[ 2ndF ] Second Function Select Key

Some keys have a second function inscribed above them. To perform this second function, press [ 2ndF ]. “ 2F ” appears in the display then press the key.

GENERAL KEYS

[ 0 ] ~[ 9 ] [ ] Data Entry keys

Press these keys in their logical sequence to enter numbers.

[ + ] [ – ] [ x ] [ ÷ ] [ = ] Basic Calculation Keys

Press these keys in their logical sequence for addition, subtraction, multiplication, division, and to display answers.

[ ON/C ] Power On / Clear Key

Press [ ON/C ] to turn on the calculator and to clear everything except the contents of the memory, constant memory(Ka, Kb), and program memory.

[ CE ] Clear Entry Key

Press [ CE ] to erase incorrect entries.

[ 00Æ0 ] Right Shift Key

Press to clear the last significant digit of the number displayed.

 (Ex.) 123456 123456 [ 00Æ0 ] 12345 [ 00Æ0 ] 1234

[ +/– ] Sign Change Key

Press [ +/– ] to change the displayed number from positive to negative or from negative to positive.

MEMORY KEYS

[ MR ] Memory Recall Key

Press [ MR ] to display the contents of the memory.

[ XÆM ] Memory Store Key

Press [ XÆM ] to store the displayed value into memory. Any previous value in memory is automatically erased.

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[ M+ ] Memory Plus Key

Press [ M+ ] to total the current calculation and add the result to the value already in memory.

[ 2ndF ] [ KaxÆk ], [ 2ndF ] [ KbxÆk ] Constant (Ka, Kb) Memory

Store Key

Press to enter the displayed value into constant memory Ka or Kb.

[ KaxÆk ], [ KbxÆk ] Memory Recall Key

Press to display the contents of a constant memory. Note :

Constant memories Ka and Kb can have a value of 0

If you press [ KaxÆk] or [ KbxÆk] after entering a number or marking a calculation, the displayed value is multiplied by the value in Ka or Kb.

SPECIAL KEYS

[ ( ], [ ) ] Parenthesis Keys

Press to override the calculation’s default order of operation by using parentheses. You can use up to 6 levels of parenthes in a single calculation.

[ EXP ] Exponent Key

To enter a number in scientific notation, first enter the numbers for the mantissa, press [ EXP ], and then enter the numbers for the exponent.

[ 2ndF ] [ ] Key

Press [ 2ndF ] [ ] to display the value of , which is the ratio of circle’s circumference to its diameter (approximately 3.141592654).

[ 2ndF ] [ XY ] Register Exchange Key

Press [ 2ndF ] [ X↔Y ] to exchange the displayed value (X–register) with the contents of the working register (Y–register).

 (Ex.) 123 [ + ] 456 [ = ] 579 [ 2ndF ] [ X↔Y ] 456 [ 2ndF ] [ X↔Y ] 579

[ 2ndF ] [ FIX ] Decimal Point Set Key

Use to set the number of digits displayed after the decimal point in either final or intermediate results. The calculator continues to use its full range for internal calculations and only rounds the number in the display.

[ 2ndF ] [ FIX ] [ 0 ]~[ 6 ] –– Sets the number of digits to be displayed to the right of decimal point.

 • [ 2ndF ] [ FIX ] [ 7 ], [ 8 ], [ 9 ], [ ] –– Selects floating point format. (Ex.) 5 [ ÷ ] 9 [ = ] 0.555555556 [ 2ndF ] [ FIX ] [ 2 ] 0.56 [ 2ndF ] [ FIX ] [ 5 ] 0.55556

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 [ 2ndF ] [ FIX ] [ ] 0. 555555556

Note : [ 2ndF ] [ FIX ] is inactive immediately after and during numerical input.

[ SCI ] Scientific Key

Converts the displayed number into a power of ten and back.

 (Ex.) : 12.3456 [ x ] 10 [ = ] 123.456 [ SCI ] 1.23456 02 [ SCI ] 123.456 [ SCI ] 1.23456 02

[ DRG ] Angle unit conversion key

UNIT CONVERSION KEY

This calculator has 13 unit conversion keys as follows. Each key has two conversion features. For example, pressing [ AÆB ] before

[ ln↔cm] can convert a number in inches to centimeters ; Pressing

[ 2ndF ] [ AÅB ] before [ ln↔cm] can convert a number in centimeters to inches.

 Key Meanings [ in↔cm ] inch↔centimeter [ feet↔m ] feet↔meter [ feet 2 ↔ m 2 ] feet 2 ↔meter 2 [ B.gal↔l ] Britain. gallon↔liter [ gal↔l ] gallon↔litre [ Pint↔l ] Pint↔litre [ Tr.oz↔g ] Troy ounce↔gram [ oz↔g ] ounce↔gram [ lb↔kg ] libra↔kilogram [ atm↔kpa ] atmospheric pressure↔kilopascal [ cal↔KJ ] calorie↔Kilo–Joule [ ↔ ] Fahrenheit ↔ Celsius [ mmHg↔Kpa ] mmHg↔kilopascal FUNCTION KEYS

[ 2ndF ] [ ], [ 2ndF ] [ ] Sexagesimal Notation / Decimal Notation Conversion Keys

To change from sexagesimal (base 60) notation (degree, minute, second) to decimal notation (degree) press [ 2ndF ] [ ]. To change from decimal notation to sexagesimal notation, enter the number in decimal form and then press [ 2ndF ] [ ].

[ sin ], [ cos ], [ tan ] Sine, Cosine, Tangent Keys

Calculate the trigonometric functions of the displayed value.

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[ 2ndF ] [ sin –1 ], [ 2ndF ] [ cos–1 ], [ 2ndF ] [ tan–1 ] Inverse Sine, Inverse Cosine, Inverse Tangent Keys

Calculate the inverse trigonometric functions of the displayed value.

[ 2ndF ] [ HYP ] [ sin ], [ 2ndF ] [ HYP ] [ cos ], [ 2ndF ] [ HYP ] [ tan ] Hyperbolic Keys

Calculate the hyperbolic functions of the displayed value.

[ 2ndF ] [ HYP ] [ 2ndF ] [ sin–1 ], [ 2ndF ] [ HYP ] [ 2ndF ]

[ cos–1 ], [ 2ndF ] [ HYP ] [ 2ndF ] [ tan–1 ] Inverse Hyperbolic Keys

Calculate inverse hyperbolic functions of the displayed value.

[ Log ], [ 2ndF ] [ 10 x ] Common Logarithm And Common Antilogarithm Keys

Calculate the common logarithm of the displayed value. To calculate the common antilogarithm of the displayed value, press [ 2ndF ] [ 10 x ].

[ ln ], [ 2ndF ] [ ex ] Natural Logarithm And Natural Antilogarithm Keys

To calculate the neutral logarithm of the displayed value, press [ ln ]. To calculate the natural antilogarithm of the displayed value, press

[ 2ndF ] [ e x ].

[ ], [ x 2 ] Square Root And Square Keys

Press [ ] to find the square root of the displayed value. To square the displayed value, press [ x 2 ].

[ 2ndF ] [ 3 ] Cubic Root Key

Press [ 2ndF ] [ 3 ] to find the cubic root of the displayed value.

[ 2ndF ] [ 1/x ] Reciprocal Key

Press [ 2ndF ] [ 1/x ] to calculate the reciprocal of the displayed value.

[ 2ndF ] [ n! ] Factorial Key

To find the factorial of the displayed value, press [ 2ndF ] [ n! ]

[ x y ] Power Key

Press any number [ x ],[ x y ], any number [ y ], and [ = ] raise x to the y power.

[ 2ndF ] [ y x ] Root Key

Press any number [ x ] [ 2ndF ] [ yx ], any number [ y ], and [ = ] to display the yth root of x.

[ a bc ], [ 2ndF ] [→ de ] Fraction key

Pressing by [ a bc ] can enter a fraction or convert a fraction to a decimal number. Pressing by [ 2ndF ] [ → de ] can convert a mixed number to an improper fraction and vice versa.

[ CONST ] Physics Constant Key

This calculator enables you to perform calculations with 15 built–in

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physics constants. Just pressing [ CONST ] key continuously can show the following symbols and values.

 Symbol Meaning Value c Speed of light 299792458 m / s g Acceleration of gravity 9.80665 m s –2 G Gravitational constant 6.6725985 x 10 –11 N m 2 kg –2 Vm Molar volume of ideal gas 0.0224141 m 3 mol –1 N A Avagadro’s number 6.0221367 x 10 23 mol –1 R Molar gas constant 8.3145107 J / K mol e Elementary charge 1.6021773 x 10 –19 C m e Electron mass 9.1093898 x 10 –31 kg m p Proton mass 1.6726231 x 10 –27 kg m n Neutron mass 1.6749286 x 10 –27 kg u Unified atomic mass 1.6605402 x 10 –27 kg h Plank constant 6.6260755 x 10 –34J.S k Boltzmann constant 1.3806581 x 10 –23 J.K –1 0 Magnetic permittivity 0.000001257 Hm –1 0 Dielectric permittivity 8.854187817 x 10 –12 Fm –1

PROGRAMMING KEYS (USE IN THE PGM MODE ONLY)

[ 2ndF ] [ PGM ] Program Mode Set and Clear Key

Set the calculator to the learn program mode. PGM appears on the display and the previous contents of program memory are cleared.

When you finish entering the program, press [ 2ndF ] [ PGM ]. The program you just entered is stored in the program memory. PGM disappears and the calculator exits the program mode.

[ RUN ] Compute Key

Runs the recorded program.

[ 2ndF ] [ [x] ] Specify Variable Key

Lets you have the calculator wait for an entry during a program.

[ 2ndF ] [ HALT ] Temporarily Halt Calculation Key

Temporarily halts a program so you can view the intermediate results or interrupt calculation.

STATISTICAL KEYS (USE IN THE STAT MODE ONLY)

[ 2ndF ] [ STAT ] Statistical Mode Select Key

Sets the calculator to statistical calculation mode. STAT appears in the display.

[ 2ndF ] [ CAD ] Statistical Register Clear Key

Clears the statistical calculation registers.

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