Sonin InchMate+ DT110 Reference Manual

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Page 1

Reference Guide

Professional Foot / Inch / Fraction Calculator

SONIN INC. Phone: 800-223-7511  Website: www.sonin.com

InchMate®+

Model DT110

InchMate®+

Introduction ............................................... 2

Getting Started ......................................... 3

Key Pad Information

General Purpose Keys .............................. 5

Dimension Keys ........................................ 7

Triangle Keys ............................................. 8

Example Problems

Working In Inches & Fractions ................. 10

Normal Calculator Use ............................. 11

Carpentry - Rough Opening .................... 12

Carpentry - Rafter Length ........................ 13

Carpentry - Stair Risers ........................... 14

Carpentry - Board Cutting ........................16

Carpentry - Joist Numbers .......................17

Roof Rise ................................................ 18

Roof Slope - Given Rise & Run .............. 19

Squaring a Foundation ........................... 20

Masonry - Brick Coursing ........................ 21

Area of a Bearing Plate ........................... 22

Area of a Circle ....................................... 23

Area of a Rectangle ................................ 24

Area of a Square ..................................... 25

Matting a Picture ..................................... 26

Converting Dimensions ........................... 27

Reference

Chaining ................................................... 28

Rounding ................................................. 29

Error / Overflow ........................................ 30

Care and Batteries ................................... 31

Appendix

Conversions ............................................. 32

Area Formulas ......................................... 33

Volume Formulas ..................................... 34

Lumber Sizes ........................................... 35

FCC Statement & Warranty ..................... 36

CONTENTS

- 1 -

INTRODUCTION

- 2 -

If you build or design things you know the importance of working with accurate dimensions. The most frustrating and costly construction headaches can usually be traced to dimensional errors.

INCHMATE+ is a calculator for people who work with dimensions. The simple measurements  Foot-Inch-Fraction (or fif)  you make with rulers and tape measures become difficult and tedious when you try to add and subtract them ... let alone multiply and divide.

INCHMATE+ calculates these dimensions automatically.

INCHMATE+ was designed to be incredibly easy to use. It has a patented "self-prompting" system leading you through the process of entering Foot- inch-Fraction (or fif) dimensions.

INCHMATE+ accepts inputs to 1/16"... the practical limit of accuracy for common building and design projects.

Page 2

- 3 -

GETTING STARTED

If you are familiar with simple hand-held calculators, the INCHMATE+ keyboard looks similar, with one exception: the 6 gray and green keys are used to enter dimensions of Foot-inch- Fraction (or fif). Detailed functional definitions for these and other keys are found on pages 5 -

9. However, the best way to get to know your INCHMATE+ is to start off by solving a simple dimensioning Problem.

2'- 9 11/16" + 17'- 5 3/4" = ??

Turn INCHMATE+ on with the switch located to the right of the label. The mode indicator in the upper left corner of the display indicates it's in the Foot-Inch-Fraction mode.

The blinking "FT" is prompting you to enter the number of FEET in the first dimension.

Press:

2 and

ENTER

to move to the INCH

field.

The display shows the number of FEET and the blinking "IN" is prompting you to enter INCHES:

- 4 -

GETTING STARTED

Press: 9 and

ENTER

to move to the

NUMERATOR field.

Now both the FOOT and INCH digits are showing in the display, and the numerator (upper half) of the FRACTION is blinking:

Press:

1 1

and

/ 16

to complete the

entry.

The first dimension, 2'- 9 11/16", now appears in the display, just as you would write it. The function and second dimension are entered in the same left-to-right order, beginning with the function sign:

Press:

Answer:

1 7

ENTER

35 / 4

ENTER

20- 3

' ''

- 5 -

KEY PAD INFORMATION

GENERAL PURPOSE KEYS

on off

Turns calculator ON and OFF. To save the battery, calculator will turn off automatically after about 5 minutes of non use.

 CE   C

Pressing this key once clears the current entry. Pressing it twice clears display to "0". Memory register is not affected.

STO

Stores the value displayed to the memory register, where it remains until another value is stored. "MEMORY" label on the display signals a value is in the memory register. Values stay in memory even after calculator is turned off. To clear memory label store "0" into memory.

Note: The [STO] function is not available for Number mode calculations.

2nd

STO

RCL

Recalls to the display the value stored in memory register, without clearing that value.

0 9

Enters the numbers 0 thru 9 into the display.

Page 3

- 6 -

KEY PAD INFORMATION

1 2

3 4

Performs arithmetic operation  the display "blinks" to confirm the key press.

Completes all previously entered arithmetic operations and displays the result. See page 21 for the use of this key with constants.

Enters a decimal point when in the df, m or number mode.

2nd

Activates the "2nd function" of designated keys. Display blinks after press until a "2nd function" key is pressed. Press again to stop blinking.

2nd

Calculates the square of the value displayed. A fif or if display will automatically change to df when squared.

2nd

Calculates the square root of the value displayed. A fif or if display will automatically change to df when the square root is taken.

- 7 -

KEY PAD INFORMATION

DIMENSION KEYS

fifdfm modes

Converts between Foot-Inch-

Fraction (fif), Decimal Feet (df) and Meters (m). The small labels at the

top of the display indicate which mode you're in. Switching modes works in both directions.

ENTER

When in fif mode, this key ends a FEET or INCH entry and advances

to the next input position.

/ 2 / 4 / 8 / 16

When in fif mode, these denominator keys will complete your FRACTION entries.

2nd

fif  if

Changes display format between

Foot-Inch-Fraction (fif) and InchFraction (if). Functional only when

starting in the fif or if modes.

Puts calculator into the number modes where it works as a normal calculator (no dimensions) Return to the fif mode anytime by pressing

fifdfm modes

again.

2ndFNfifdfm

modes

number mode

- 8 -

KEY PAD INFORMATION

TRIANGLE KEYS

Enter any 2: A, B, C, or S and automatically solve for the other 2.

diagonal

run

rise

12"

S = slope in inches

If any 2 of the above values are entered pressing A, B, C, or S will display the calculated or stored value of the key.

The triangle key values are retained in memory even after INCHMATE+ is turned off.

"run"  Press keys after an entry or

a calculated result is displayed to enter that value into "run" memory or to recall.

"rise"  Press keys after an entry or

a calculated result is displayed to enter that value into "rise" memory or to recall.

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- 9 -

KEY PAD INFORMATION

"diagonal"  Press keys after an

entry or a calculated result is displayed to enter that value into "diagonal" memory or to recall.

2nd

"slope"  Press keys after an entry or a calculated result is displayed to enter that value into "slope" memory or to recall.

Remember: "slope" is always "rise" in INCHES over a "run" of 12 inches.

- 10 -

EXAMPLE PROBLEM

WORKING IN INCHES & FRACTIONS

Given a string of dimensions in inches and fractions find the total.

39 5/8" + 147 3/16" = ??

From the Foot-inch-Fraction mode...

Press:

Note: From now on all entries will be in inches and fractions.

Press:

Answer:

To return to Foot-inch-Fraction mode

Press:

If there is a value in the display it will toggle between the fif and if formats.

ENTER

5 / 8

ENTER

1 4 7

3 / 16

186

2nd

fif  if

2nd

fif  if

- 11 -

EXAMPLE PROBLEM

NORMAL CALCULATOR USE

56.75 x 18 = ??

From any mode ...

Press:

Note: From now on all entries will be non dimensional.

Press:

Answer:

Return to fif mode anytime by ...

Pressing:

2ndFNfifdfm

modes

number mode

5 6

785

1021.5

fifdfm modes

number mode

Page 5

- 12 -

EXAMPLE PROBLEM

CARPENTRY - ROUGH OPENING

Given 5 windows, each 2'- 11 7/16 wide, find their overall width if they are placed side-by-side in a wall.

Press:

Answer:

Press: to see the fif answer

2' 11 7/16" × 5 = ??

ENTER

7 / 16

14.765625

14- 9

' ''

fifdfm

modes

- 13 -

EXAMPLE PROBLEM

CARPENTRY - RAFTER LENGTH

Right triangle problems are easy with INCHMATE+. In this example enter the two known sides, A and B, and press

to automatically

solve for the 3rd side:

Press:

To find the unknown Rafter Length:

Press:

Answer:

Note: Press A, B, C, or S to review the 4 variables associated with this right triangle.

C = ??

diagonal

run

A = 12' - 2 1/2"

rise

B = 4' - 6 1/4"

ENTER

1 2

ENTER

A1 / 2

ENTER

B1 / 4

13- 0

' ''

- 14 -

EXAMPLE PROBLEM

CARPENTRY - STAIR RISERS

Given 8'- 10 3/ 4" for a Floor-to-Floor dimension, how many risers will be required approximately 8" high? What is the exact height of each riser?

Press:

Remember: Store in memory for later use.

Press:

Answer:

Remember: The answer reads as 13 units (risers) plus a remainder. If the answer is 13.4 or less round down to 13 risers.

To find the dimension of each riser you must now recall the Floor-to-Floor dimension from memory...

Press:

Answer:

13.34375

0.6842948

ENTER

018

ENTER

STO3 / 4

2nd

1 3

STO

RCL

ENTER

Page 6

- 15 -

EXAMPLE PROBLEM

Remember: To see the answer in fif you must convert from Decimal Feet (or df).

Press:

fifdfm modes

to see the fif answer :

Important: Turn to page 29-30 for help with possible rounding errors in division problems.

0- 8

' ''

- 16 -

EXAMPLE PROBLEM

CARPENTRY - BOARD CUTTING

How many 9 1/2" pieces can be cut from a 16' long 2" x 4".

Press:

Answer:

(Round down to twenty whole pieces.)

16' - 0"

20.210526

1 6

ENTER

1 / 2

ENTER

- 17 -

EXAMPLE PROBLEM

32' - 4"

CARPENTRY - JOIST NUMBERS

Find the number of joists on 16" centers needed for a 32'- 4" long room.

Press:

Answer:

(Add 1 for the end = 25.25 and round up to 26.)

24.25

1 6

ENTER

23 4

ENTER

Page 7

- 18 -

EXAMPLE PROBLEM

ROOF RISE

This is a useful calculation in determining wall heights. This example will figure the RISE of a roof knowing the SLOPE is 4 in 12 and the RUN is 13'- 2 3/8"

Remember: The SLOPE of a roof equals its RISE in INCHES over a RUN of 12", thus a 4/12 roof has a SLOPE of "4".

When using the SLOPE function always enter it in INCHES.

Press:

Answer:

Note: Inputs may be reviewed by

pressing the or keys.

4- 4

' ''

rise

A = 13- 2 3/8

B = ??

slope

run

ENTER

2nd

1 3

ENTER

3 / 8

ENTER

2nd

- 19 -

EXAMPLE PROBLEM

ROOF SLOPE - GIVEN RISE & RUN

Press:

Answer:

Remember: "slope" is always "rise" in INCHES over a "run" of 12 inches.

rise

A = 20- 0

B = 6 8

slope = ??

run

6 B8

ENTER

2nd

- 20 -

EXAMPLE PROBLEMS

SQUARING A FOUNDATION

Calculate the DIAGONAL of the above rectangle.

Press:

Answer:

The sides will be SQUARE when the DIAGONAL measures 68'- 6 1/8".

68- 6

' ''

65' - 8 1/2"

19' - 4 3/4"

diagonal

ENTER

56 8

/ 2

ENTER

34/ 4

ENTER

Page 8

- 21 -

EXAMPLE PROBLEMS

MASONRY - BRICK COURSING

Using a standard brick of 2 1/4" and a 3/8 joint, create a "Coursing Table".

Press:

Answer:

Remember:

1 5

takes the value in the

display and adds it to itself  then each successive press of

adds 0'- 2 5/8" to the current total.

Press:

Answer:

Press:

Answer:

This technique can be applied to any repetitive dimensioning problem, such as studs spaced at 16" on center.

0- 2

' ''

0- 5

' ''

0- 7

' ''

1 5

ENTER

12/ 4

ENTER

3 / 8

ENTER

- 22 -

EXAMPLE PROBLEMS

AREA OF A BEARING PLATE

Find the area (in square inches) of a bearing plate measuring 1'- 2 3/4" x 8 5/8.

Press:

Answer: (Sq. Ft.)

Remember: This answer is expressed in sq. feet. For sq. inches multiply by 144.

Press:

Answer: (Sq. In.)

0.8834635

127.21875

ENTER

1 2

33/ 4

ENTER

5 / 8

ENTER

41 4

- 23 -

EXAMPLE PROBLEMS

AREA OF A CIRCLE

Given a circle with a radius of 7'- 7 7/8" find the area in square feet.

A = p r

p = 3.1416

Note: These formulas are found in the Appendix, on pages 34 and 35.

Press:

Answer:

Press:

Answer: (Sq. Ft.)

58.618164

184.15482

ENTER

7 / 8

2nd

1 6· 13 4

Page 9

- 24 -

EXAMPLE PROBLEMS

AREA OF A RECTANGLE

Press:

Answer: (Sq. Ft.)

Remember: Areas can only be expressed in Decimal format, not Foot-Inch-Fraction format.

536.85416

29' - 5"

18' - 3"

Area ??

ENTER

- 25 -

EXAMPLE PROBLEMS

AREA OF A SQUARE

Press:

Answer: (Sq. Ft.)

21.294379

4' - 7 3/8"

Area ??

ENTER

/ 8

ENTER

2nd

- 26 -

EXAMPLE PROBLEMS

MATTING A PICTURE

Press:

Answer:

Press To see the fif answer

This is the mat space on each side of the picture.

? 1' - 3 5/8" ?

2' - 9 11/16" frame width

Frame Width - Picture Width

MATT WIDTH =

0.7526041

0- 9

' ''

fifdfm

modes

2 9

ENTER ENTER

/ 16

ENTER

54/ 8

ENTER

Page 10

- 27 -

EXAMPLE PROBLEMS

CONVERTING DIMENSIONS

Press:

Answer: (Dec. Ft.)

To convert the original dimension to Meters ...

Press:

Answer: (Meters)

Remember: The label at the top of the display tells you what dimension mode you are working in. You may switch modes in either direction by depressing the

fifdfm modes

button as the arrows

indicate.

21'- 7 3/16" = ?? Decimal Feet

21.598958

6.5833625

fifdfm

modes

ENTER

37 / 16

ENTER

fifdfm

modes

- 28 -

REFERENCE

CHAINING

INCHMATE+ utilizes chaining logic allowing you to carry out successive intermediate operations using the 5 key to finalize operations.

Since the chaining logic works from left to right, you must use care when combining operations such as addition and multiplication by first addressing operations within brackets.

Example: 1 + 2 x 3 + 4 = 13

Enter the values and operators as they are written and press

to get the answer.

Example: (1 + 2) x (3 + 4) = 21

Press:

STO

Puts current display into memory.

2nd

STO

RCL

Can be used anytime in the midst of

a chain operation and acts like a typical numerical entry.

STO

1 2

3 4

STO

RCL

2nd

- 29 -

REFERENCE

ROUNDING

INCHMATE+ rounds Foot-Inch-Fraction answers to the nearest 1/16" in the display, but an accurate decimal value is always contained in the internal memory.

In DIVISION problems, an error of up to 1/32" may be contained in answers if the numerator is not exactly divisible by 1/16". If you use such an answer repetitively, as in a stair riser calculation, this rounding error could accumulate into a larger error. There is an easy way to check if this is occurring...

Example: In the STAIR RISER problem found on page 14-15, a floor-to-floor height of 8'- 10 3 /4" is divided by 13 risers, displaying a riser height of 8 3/16 ". To check for an error in this answer, first clear the calculator. Then enter 8 3/16" and multiply it by 13 risers...

Press:

Answer:

8.8697916

 CE   C

ENTER ENTER

33/ 16

Page 11

- 30 -

REFERENCE

Since this result is 5/16" less than the original 8'10 3/4", YOU must lay out each riser a hair more than 8 3/16.

Remember: Only calculations using the DIVISION function can produce an error. The error will never exceed 1/32", so you only need to check the result of such calculations if you intend to multiply it by a large enough number to accumulate a significant error.

ERROR / OVERFLOW

An error/overflow condition occurs when the result of a calculation has more than 8 digits to the left of the decimal point, or when you attempt to divide a value by zero.

An error/overflow condition is indicated by the "ERROR" label in the upper right corner of the display. You must clear the calculator display by pressing the

 CE

  C

key twice before continuing operations. Clearing an error/overflow condition will not clear values stored in the memory registers.

CARE

Don't leave calculator in direct sunlight for long periods, or store it where excessive temperatures are possible.

- 31 -

REFERENCE

Don't leave the calculator on when not in use. (NOTE - To save the battery, calculator will turn off automatically after about 5 minutes of non use.)

BATTERIES

This unit requires one 3V lithium battery (CR2016 or equivalent) The average battery operating life is 1000 hours. When the display slows down and/or becomes dim, it is time for a new battery.

To change batteries:

1. Turn power off.

2. Remove screw from battery lid.

3. Before removing battery, be sure to touch a metal object. This is to avoid any accidental discharge of static electricity, which may harm the circuit board.

4. Install new battery with the (+) side up.

RESETTING YOUR CALCULATOR

To reset your calculator, turn unit over and see RESET. Press with point of ball point pen. You calculator is now reset.

NOTE: RESETTING YOUR CALCULATOR WILL ERASE ANYTHING IN MEMORY.

- 32 -

APPENDIX

CONVERSION TABLES

1 square inch = 6.4515 sq centimeters 1 square foot = 144 square inches 1 square foot = 0.92903 sq meters 1 square yard = 9 square feet 1 square yard = 0.836127 sq meters 1 cubic inch = 16.3871 cu centimeters 1 cubic foot = 1728 cubic inches 1 cubic foot = 0.02831 cu meters 1 cubic yard = 27 cubic feet 1 cubic yard = 0.76455 cu meters 1 mile = 5,280 feet 1 mile = 1.609344 kilometers 1 acre = 43,560 square feet 1 ounce = 28.349532 grams 1 pound = 0.4535924 kilograms 1 (U.S.) gallon = 3.7854118 liters 1 (U.K.) gallon = 4.546090 liters 1 fluid ounce = 29.574 milliliters Fahrenheit = 9/5 (C) + 32 Centigrade = 5/9 (F - 32) pi (p) = 3.141593

Page 12

- 33 -

APPENDIX

AREA FORMULAS

Circle

Triangle

Sphere

Cylinder

p r

4p r

2p r(r+I)

- 34 -

APPENDIX

VOLUME FORMULAS

Sphere

Cylinder

Cone

4p r

p b2 a

p r2I

- 35 -

APPENDIX

LUMBER SIZES

Normal Size Actual Size (S4S)

1" x 2" 3/4" x 1 1/2" 1" x 3" 3/4" x 2 1/2" 1" x 4" 3/4" x 3 1/2" 1" x 6" 3/4" x 5 1/2" 1" x 8" 3/4" x 7 1/4" 1" x 10" 3/4" x 9 1/4" 1" x 12" 3/4" x 11 1/4"

2" x 2" 1 1/2" x 1 1/2" 2" x 3" 1 1/2" x 2 1/2" 2" x 4" 1 1/2" x 3 1/2" 2" x 6" 1 1/2" x 5 1/2" 2" x 8" 1 1/2" x 7 1/4" 2" x 10" 1 1/2" x 9 1/4" 2" x 12" 1 1/2" x 11 1/4"

4" x 4" 3 1/2" x 3 1/2" 4" x 6" 3 1/2" x 5 1/2" 4" x 8" 3 1/2" x 7 1/4" 4" x 10" 3 1/2" x 9 1/4" 4" x 12" 3 1/2" x 11 1/2"

Page 13

- 37 -

CUSTOMER SERVICE

- 36 -

APPENDIX

FCC STATEMENT

This device has been tested and found to comply with the limits for a Class B device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This device generates, uses and can radiate radio frequency energy and, if not used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the device off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

- Reorient or relocate the receiving antenna

- Increase separation between the device and receiver

TECHNICAL ASSISTANCE

If you have any questions or need technical assistance, e-mail to:

CUSTOMER SERVICE

SONIN takes pride in offering unmatched customer service to owners of SONIN products. If you have any questions or would like additional information, please call:

or e-mail to:

[email protected]

1 - 800 - 223 - 7511 (USA)

[email protected]