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Sight Enhancement Systems SciPlus-2500, Руководство пользователя

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Sight Enhancement Systems SciPlus-2500 Скачать руководство пользователя страница 38

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Page!32!of!35!

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version!1.2!

Solving*for*Zeros*(Poles)*

With!the!SciPlusB2500,!you!can!find!the!points!along!a!graph!for!which!y=0.!!These!are!called!the!“zeros”!
or!“poles”!of!a!function.!!Note!that!some!functions,!such!as!a!sine!wave,!will!have!multiple!zeros.!!Others!
may!have!none.!

To!find!a!zero,!you!need!to!give!the!SciPlusB2500!a!hint,!by!telling!it!two!values!along!the!curve!near!the!
zero.!!The!easiest!way!to!do!this!is!by!moving!the!cursor!left/right!(see!“Using!the!Cursor”!on!page!28).!

When!you!have!the!cursor!slightly!to!the!left!of!a!pole,!push!the!soft!key!

A

.!!Then!move!the!cursor!right,!

so!that!it!is!positioned!just!to!the!right!of!the!pole!and!push!the!soft!key!

B

.!!This!defines!two!xBvalues,!

one!on!either!side!of!the!pole.!

Press!!!!!!!!!!and!

2

!to!view!the!last!screen,!called!“ZERO”,!shown!at!right.!!You!

can!see!that!the!A!and!B!xBvalues!you!selected!when!moving!the!cursor!are!
displayed.! ! You! can! also! enter! or! edit! values! for! A! and! B! on! this! screen!
directly.!

Now!push!the!soft!key!

D

!“ZERO”!to!solve!for!the!zero!value.!!The!SciPlusB

2500!will!display!the!xBvalue!at!which!the!graph!meets!the!xBaxis!(y=0).!!

5 

A  B  C  D 

ZERO 

EDIT  CLR  ZERO 

A=3.25625 

B=

3.55625 

Содержание SciPlus-2500

Страница 1: ...User Guide...

Страница 2: ......

Страница 3: ...1 Charging your SciPlus 2500 2 The SciPlus 2500 Display 3 SciPlus 2500 Operations 4 Adjusting the Display Contrast 5 Soft Keys 5 Working with Previous Results 5 Auto Shutoff 6 Settings 7 Basic Functio...

Страница 4: ...2500 to Evaluate Mathematical Functions 22 Calculating values of f x 24 Exiting functions mode 26 Some guidelines while in functions mode 26 Graphing with Your SciPlus 2500 27 Viewing the Graph 27 Usi...

Страница 5: ...2014 Sight Enhancement Systems version 1 2...

Страница 6: ......

Страница 7: ...contrast dial USB ENTER soft keys speech earbud jack Getting Started The SciPlusB2500 calculator performs a wide variety of mathematical statistical and trigonometric calculations This User Guide will...

Страница 8: ...charge it up and you re good to go Your SciPlusB2500 calculator includes a USB wall charger USB cable and earbuds Please ensure that these items are in the box When the SciPlusB2500 is charging you w...

Страница 9: ...very small or very large number Use the keys to view the entire result The characters above the horizontal line at the top of the screen show the status line of the calculator If the battery symbol i...

Страница 10: ...d key must first be pressed Throughout the key descriptions below if a key symbol appears in a yellow background this indicates that the 2nd key must be pressed before this key is pressed Notes regard...

Страница 11: ...unction Instead labels at the bottom of the display define the function of these keys If there are no labels these keys will not do anything You will use these keys when adjusting the SciPlusB2500 s s...

Страница 12: ...he angle mode number format etc will be saved so that it will turn on again in the same state Values stored in memory and the statistics table are also saved Note that if the backlight is on when the...

Страница 13: ...ted by the SciPlusB2500 Standard Numbers show up to tenBdigit precision Examples 101 41250 5 0 33333333 Fixed Notation Number of decimals is fixed Examples 101 00 41250 50 0 33 Scientific Notation Num...

Страница 14: ...ly shorten the duration of a battery charge from weeks to hours For this reason the SciPlusB200 always powers on with the backlight turned off Screen Inversion Often people with low vision are able to...

Страница 15: ...in English EN and one additional language as ordered from the factory German in this example The C and D softkeys will l adjust the output volume Angle Use the A and B softkeys to select the angle mo...

Страница 16: ...session will remain as they were OFF Save settings memory and statistics data and turn calculator OFF Backspace Delete last entry or function Enter Resolves the current expression displaying the resul...

Страница 17: ...N Close Parentheses Close parentheses Change Sign Change the sign of the operand After some operands e g this operation will insert a negative sign into the expression Scientific Notation This is equi...

Страница 18: ...the left Enter x first e g 10 2 followed by yields a result of 102 or 100 y x Raises the value to the left to an exponent Enter y first Shown as e g 2 3 followed by yields a result of 23 or 8 Reciproc...

Страница 19: ...148 4131591 10 x Calculates the value of 10 raised to a value e g 10 5 followed by yields 105 or 100000 Percentage The behavior of the function depends upon context If the expression is simply a numb...

Страница 20: ...rrent line and perform simple arithmetic operations B on the value stored in memory using the current line Memory soft keys are shown on the opposite page In this example the value 15 resides in the c...

Страница 21: ...SCI 2 M STO 1st set of operators 2nd set of operators exchange 15 with memory value mulitply memory by 15 divide memory by 15 M indicates there is a value in memory clear and store 15 Places memory c...

Страница 22: ...ression is solved and the result added Note that if a value already exists in the table it will be added a second time e g 2 3 5 3 will create a table 2 3 5 3 Display Statistics Soft Keys This key cau...

Страница 23: ...2 70E 00 15 D SCI 2 2 CLR x x2 2 M 1st set of operators 2nd set of operators sum of entries mean average of entries variance median middle entry delete 15 from table if present clear table standard d...

Страница 24: ...setting DRG is also changed when converting angles is described in the table below KEY NAME DESCRIPTION Sine Calculates the sine of an expression e g assume degrees SIN 30 followed by yields 0 5 Arcs...

Страница 25: ...minutes seconds e g DMS 45 5 followed by yields 45 30 0 00 Note that if the second line is in DD format entering DMS followed by converts that value into DMS format DMS to Decimal Degrees Converts deg...

Страница 26: ...llowed by yields 6 1 2 2 0 XY Z 4 3 6 followed by yields 6 5 Note that the fraction command always requires the following syntax an integer number followed by a comma then another number followed by t...

Страница 27: ...e status line e g R P 1 1 followed by yields 1 41 45 00 Note that if the result line is in rectangular x y format entering P R followed by converts that value into polar r format Polar to Rectangular...

Страница 28: ...splayed each have unique meaning Equation Line The top line shows the equation that is being evaluated Note that equations are in the form y f a b c x and can have up to four variables a b c and x Of...

Страница 29: ...Second set of operators Push f x again This second set of soft keys allows you to define values for the variables a b c x Third set of operators Push f x a third time This third set of soft keys allow...

Страница 30: ...sh f x again to get back to the variables list a b c x Enter the expression as follows using the soft keys ABD note that D is x in this case as follows a x b y x 2 c Once you press the key the equatio...

Страница 31: ...alue for a then a will be displayed in the results line You can clear any variable using the garbage can E g a 4 What s the answer Once all four variables have been entered you can select y to display...

Страница 32: ...d in step 3 8 Clearing everything You can use CLR to clear all the constants as well as the equation and start fresh Exiting functions mode You can exit function mode by simply pressing the 2nd key fo...

Страница 33: ...s yMIN B10 yMAX 10 ySTEP 1 Viewing the Graph When you are viewing the graph you can use the keys to move the entire graph up down left right If you press the soft key C think C for cursor you will not...

Страница 34: ...ove the cursor to a new position You can only edit the x value independent variable The y value dependent variable cannot be edited Note You may only enter x values that are within the current display...

Страница 35: ...2015 Sight Enhancement Systems Page 29 of 35 SciPlusB2500 Scientific Calculator User Manual...

Страница 36: ...to manually adjust the range for the x and y axis Note that the SciPlus will never allow you to enter a minimum value that is larger than the maximum value for the x or y axis Just use the soft keys A...

Страница 37: ...gradians depending on whether the SciPlus is set to D R or G AutoBY mode In this mode the yBaxis range is set so that the minimum and maximum points of the graph within the current xBaxis range occup...

Страница 38: ...on page 28 When you have the cursor slightly to the left of a pole push the soft key A Then move the cursor right so that it is positioned just to the right of the pole and push the soft key B This de...

Страница 39: ...again push you will see the graph at right Notice that there are two zeros Let s find the one on the right First make sure the cursor is flashing the soft key C Then move the cursor just to the left o...

Страница 40: ...speech output on off Read status line HINT Always ensure that the volume control on your earbuds is turned up Errors Sometimes you ll enter things incorrectly such as not closing a bracket or dividin...

Страница 41: ...er s representative from whom the SciPlusB2500 was purchased A description of the problem The robustness of Sight Enhancement Systems SciPlus calculator is legendary and you should enjoy years of reli...

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Страница 44: ...364 Huron Avenue South Ottawa Ontario K1Y 0W7 CANADA www sightenhancement com...

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