Johnson CALC-1500 Manuale utente
CALC-1500
Construction Master
Calculator
Operator's Manual
CONSTRUCTION
MASTER CALCULATOR
Key Features:
• Pre-programmed right angle and stair
calculations including pitch, rise and run
• Accurate stair, rafter, roof and framing
calculations
• Easily calculate linear, area and volume
• Durable protective case for construction
environments
• Complete rafter, circular, rake wall and board
feet calculations
TABLE OF CONTENTS
GETTING STARTED ..............................1
Key Definitions/Functions ........................... 1
Basic Function Keys.................................1
Dimension Keys....................................2
Arc/Circle Keys ....................................3
Right Triangle/Roof Framing Keys ....................4
Stair Layout Key ...................................6
Stair Settings ......................................7
Miscellaneous Functions ............................7
Paperless Tape Example ............................9
Preference Setting ................................10
Entering Dimensions ...............................11
Linear Dimensions..................................11
Square and Cubic Dimensions.......................12
Linear Conversions ................................12
Square and Cubic Conversions....................... 13
Basic Math Operations ............................. 13
EXAMPLES ..................................14
Adding and Subtracting Strings of Dimensions.........14
Multiplying Dimensions ............................14
Dividing Dimensions ..............................15
Percent Calculations ...............................15
Square Area ......................................16
Rectangular Area and Volume.......................16
TABLE OF CONTENTS
Entering Square and Cubic and
Adding a Waste Allowance ......................... 17
Weight Conversions ............................... 17
Weight per Volume ...............................18
Using the Memory ................................19
Board Feet and Cost ...............................20
Carpentry — Calculating Number of Studs ............20
Baluster Spacing .................................. 21
Circle Area and Circumference ......................22
Arc Angle or Degree ...............................22
Concrete Volume for Driveway ......................23
Concrete Columns .................................23
Complex Concrete Volume ..........................24
Right Angle/Framing ..............................26
Squaring-Up a Foundation .........................27
Pitch — Converting Roof Angle ......................27
Converting Slope .................................28
Common Rafter Length ............................28
Regular Hip/Valley and Jack Rafters..................29
Irregular Hip/Valley ...............................31
Rake-Wall — With Base ............................32
Stairs............................................34
Stairs — Given Rise and Run ........................34
Stairs — Given Only the Floor-to-Floor Rise;
Entering Other Than 7-1/2 Inch Desired Riser Height ....36
TABLE OF CONTENTS
TABLE OF CONTENTS
APPENDIX ..................................37
Setting Fractional Resolution........................37
Default Settings ..................................38
Auto Shut-O.....................................38
Accuracy/Errors ...................................39
Battery ..........................................40
Replacing the Battery .............................40
Reset ...........................................40
AREA AND VOLUME FORMULAS ...................41
Area Formulas ....................................41
Volume Formulas .................................42
WARRANTY AND REGISTRATION ..................43
© 2022 Johnson Level & Tool — 1
GETTING STARTED
KEY DEFINTIONS / FUNCTIONS
BASIC FUNCTION KEYS
Arithmetic
operation keys.
0—9Keys used for entering
and numbers.
Percent Key: Four-function (+, –, x, ÷) percent key.
O Key: Turns all power o, clearing all non-
permanent registers.
On/Clear Key: Turns on power. Pressing once
clears the display. Pressing twice clears all
temporary values.
Convert Key: Used with the dimensional keys to
convert between dimensions or with other keys
to access special functions.
Square Root Key: Used to find the Square Root
of a non-dimensional or area value.
Recall Key: Used with other keys to recall stored
values and settings.
Memory Key: Adds the displayed value to
Memory. Clears when the calculator is shut o.
+
%
Off
On/C
Conv
√x
÷−=
•
×
M+
Rcl
© 2022 Johnson Level & Tool — 2
GETTING STARTED
Memory Minus (M–): Subtracts the
displayed value from Memory.
Memory Clear : Clears Memory without
changing current display.
Memory Clear : Clears Memory and
displays Memory Total.
DIMENSION KEYS
Yards Key: Enters or converts to Yards.
Feet Key: Enters or converts to Feet as whole or
decimal numbers. Also used with the Inch and
/keys for entering Feet-Inch values (e.g.,
2 Feet 8 Inch 1 /2 ). Repeated presses
during conversions toggle between Fractional
and Decimal Feet.
Inch Key: Enters or converts to Inches. Entry
can be whole or decimal numbers. Also used
with the /key for entering fractional inch
values (e.g., 6 Inch 1 /2). Repeated
presses during conversions toggle between
Fractional and Decimal Inches.
Fraction Bar Key: Used to enter Fractions. Fractions
can be entered as proper (1/2, 1/8, 1/16) or improper
(3/2, 9/8). If the denominator (bottom) is not
entered, the calculator's fractional accuracy setting
is automatically used.
Feet
Yds
Conv
Conv
Rcl
M+
Rcl
Rcl
Inch
/
© 2022 Johnson Level & Tool — 3
GETTING STARTED
Meters Key: Enters or converts to Meters.
Centimeters Key: Enters or converts to
Centimeters.
Millimeters Key: Enters or converts
to Millimeters.
Board Feet (Bd Ft): Enters or converts Cubic
values to Board Feet. One Board Foot is equal
to 144 Cubic Inches.
Weight Key: Enters or converts (a volume
value) to Tons, Pounds, Metric Tons or
Kilograms. Repeated presses will cycle
through these units.
ARC/CIRCLE KEYS
Circle Key: Calculates Circle Area and
Circumference based on entered Diameter.
Arc: Calculates Arc Length or Degree
based on entered Diameter and Arc
Degree or Length (e.g., if Arc Degree
is entered, it will calculate Arc Length,
and vice versa).
m
cm
mm
Bd Ft
Weight
Circ
CircConv
© 2022 Johnson Level & Tool — 4
GETTING STARTED
RIGHT TRIANGLE/ROOF FRAMING KEYS
Pitch Key: This key is used to enter or
calculate the Pitch (Slope) of a roof (or Right
Triangle). Pitch is the amount of “Rise” over
12 Inches of “Run.” Pitch may be entered as:
a Dimension 8 Inch Pitch
an Angle 3 0 Pitch
a Ratio 0 • 7 5 Conv Pitch
a Percentage 7 5 %Pitch
A Pitch entry will remain in permanent storage until
revised or reset. A solution will be replaced by its entered
value once the calculator is cleared.
Enters Pitch Ratio (e.g., •5 8 3
Conv Pitch ).
Rise Key: Enters or calculates the Rise or
vertical leg (height) of a Right Triangle.
Run Key: Enters or calculates the Run or
horizontal leg (base) of a Right Triangle.
Diagonal Key: Enters or calculates the
common or Diagonal leg (Hypotenuse) of
a Right Triangle. Typical applications are
“squaring” slabs or finding common
rafter lengths.
Hip/Valley Key: Calculates length of the
Regular or Irregular Hip/Valley rafter.
Pitch
Rise
Run
Diag
Hip/V
Conv Pitch
© 2022 Johnson Level & Tool — 5
GETTING STARTED
Irregular Pitch: Enters Irregular Pitch
used to calculate lengths of the
Irregular Hip/Valley and Jack rafters.
Jack Key: Calculates Jack rafter lengths on
the Regular-pitched roof side.
Irregular Jack: Calculates Jack rafter
lengths on the Irregular-pitched
roof side.
Rake-Wall Key: Finds the stud sizes based
on entered Right Triangle values and the
stored On-Center spacing. If a dimensional
value is entered before pressing R/Wall ,
that value is considered the base and will be
added to the stud lengths.
Hip/V
R/Wall
Jack
Conv
Conv
Jack
Indice
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