Radio Shack EC-2037 Manual de usuario
Cat. No. 65-534
OWNER’S MANUAL
Please read before using this equipment.
EC-2037
10-Digit Dual-Powered
Metal Case Desktop Calculator
with Tilt Display
2
FEATURES
Your RadioShack EC-2037 10-Digit Dual-Powered Metal Case
Desktop Calculator has two power sources so you can use it al-
most anywhere. Its built-in solar panel provides power when
you expose the calculator to light. When the surrounding light is
not bright enough, the supplied internal battery provides the
power. The calculator’s features include:
Large 10–Digit Liquid Crystal Display — makes it easy to
read calculation results.
Adjustable Tilt Display — lets you adjust the display to the
best viewing angle.
Four–Function Memory — saves important subtotals, and lets
you add to and subtract from them.
Percentage Calculation — simplifies discount, percentage
change, and tax calculations.
Automatic Power-Off — conserves battery power by turning
off your calculator if you do not press a key for about 5 minutes.
Square Root Function — quickly computes the square root of
the displayed number.
+/– Key — changes the sign of the displayed number.
©1999 Tandy Corporation.
All Rights Reserved.
RadioShack is a registered trademark used by Tandy Corporation.
3
CONTENTS
Operation ............................................................................... 4
Turning the Calculator
On and Off .............................................................................. 4
Using the +/– Key ............................................................ 4
Correcting Entry Errors .................................................... 5
Estimating Calculation Results ................................. 6
Calculation Examples ...................................................... 7
Mixed Calculations ................................................... 7
Constants ................................................................. 8
Percentage ............................................................... 9
Add-On ..................................................................... 9
Discount ................................................................... 9
Reciprocal .............................................................. 10
Exponent ................................................................ 10
Square .................................................................... 10
Square Root ............................................................ 11
Memory Calculations ............................................... 11
Care ...................................................................................... 13
Replacing the Battery ......................................................... 14
Specifications ..................................................................... 15
4
OPERATION
TURNING THE CALCULATOR
ON AND OFF
Press ON/C to turn on your
calculator, then tilt the display
to the best viewing angle.
To clear a calculation from the
display, press ON/C again.
If you do not press a key for
about 5 minutes, your calcula-
tor automatically turns off. To
turn it off sooner, press OFF.
USING THE +/– KEY
Press +/– to change the displayed number from positive to neg-
ative or from negative to positive. When the number is negative,
–appears on the left side of the display.
5
CORRECTING ENTRY ERRORS
If you enter an incorrect value, press CE once. Then enter the
correct value and continue your calculation.
If you press an incorrect function key (+, –, ×
××
×, ÷), simply press
the correct function key and continue your calculation.
Eappears in the lower left corner when:
• A calculation result exceeds 10 digits to the left of the deci-
mal point. This is an overflow error. See “Estimating Calcu-
lation Results” on Page 6.
• A memory calculation result exceeds 10 digits to the left of
the decimal point. (The memory contents remain
unchanged.)
• You try to divide by 0.
• You try to calculate the square root of a negative number.
If Eappears, press ON/C to clear the error.
6
Estimating Calculation Results
If you perform a calculation that results in an overflow error, you
can estimate the correct result (to 10 significant digits) by fol-
lowing these steps.
1. Count the number of digits displayed to the left of the deci-
mal point.
2. Remove the decimal point.
3. Add as many zeros to the right of the number as there were
digits to the left of the decimal point.
For example, if E251.0142064 appears, the approximate
answer is 2,510,142,064,000. If E17319.70347 appears,
the approximate answer is 173,197,034,700,000.
7
CALCULATION EXAMPLES
You can perform basic calculations (addition, subtraction, and
so on) with this calculator as you would with most other calcula-
tors. The following sections include examples of more ad-
vanced calculations.
Mixed Calculations
Example: 256 + 378 – 223 × 2.3 ÷ 2.5 + 24 – 36 =
You Press: You See:
256 + 378 = 634.
– 223 = 411.
×
××
×2.3 = 945.3
÷ 2.5 = 378.12
+ 24 = 402.12
– 36 = 366.12
8
Constants
For multiplication, the first value you enter is the constant. For
addition, subtraction, and division, the second value you enter is
the constant.
Constant: You Press: You See:
22
×
××
×4 = 8.
=16.
=32.
63+6= 9.
=15.
=21.
5 50 – 5 = 45.
=40.
=35.
2 48 ÷ 2 = 24.
=12.
=6.
9
Percentage
Example: 20% of 720 is 144.
Add-On
Example: 30% added to 540 is 702.
Discount
Example: 800 discounted by 20% is 640.
You Press You See
720 ×
××
×20 % 144.
You Press You See
540 + 30 % 702.
You Press You See
800 – 20 % 640.
10
Reciprocal
Example: 1/8= 0.125
Exponent
Example: 76= 117649
Square
Example:42= 16
You Press You See
1 ÷ 8 = 0.125
You Press You See
7 ×= = = = = 117,649.
You Press You See
4 ×= 16.
Tabla de contenidos
Otros manuales de Calculadora de Radio Shack
Radio Shack
Radio Shack EC-3031 Manual de usuario
Radio Shack
Radio Shack EC-293 Manual de usuario
Radio Shack
Radio Shack 65-522 Manual de usuario
Radio Shack
Radio Shack 65-500 Manual de usuario
Radio Shack
Radio Shack Astro Manual de usuario
Radio Shack
Radio Shack BlackJack 21 Manual de usuario
Radio Shack
Radio Shack Building trades calculator Manual de usuario
Radio Shack
Radio Shack TRS-80 PC-3 Manual de usuario
Radio Shack
Radio Shack EC-300 Manual de usuario
Radio Shack
Radio Shack 65-789 Manual de usuario
Radio Shack
Radio Shack EC-4004 Manual de usuario
Radio Shack
Radio Shack TRS-80 26-3650 Manual de usuario
Radio Shack
Radio Shack EC-200 Manual de usuario
Radio Shack
Radio Shack EC-235 Manual de usuario
Radio Shack
Radio Shack EC-252 Manual de usuario
Radio Shack
Radio Shack BLACKJACK 21 Manual de usuario
Radio Shack
Radio Shack 65-541 Manual de usuario
Radio Shack
Radio Shack 65-115 - Scientific Calculator Manual de usuario
Radio Shack
Radio Shack 65-1002 Manual de usuario
