Radio Shack EC-2037 User Manual
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
FEATURES
Your RadioShack EC-2037 10-Digit Dual-Powered Metal Case
Desktop Calculator has two power sources so you can use it almost 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.
©
RadioShack is a registered trademark used by Tandy Corporation.
All Rights Reserved.
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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
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OPERATION
TURNING THE CALCULATOR
ON AND OFF
Press
calculator, then tilt the display
to the best viewing angle.
To clear a calculation from the
display, press
If you do not press a key for
about 5 minutes, your calculator automatically turns off. To
turn it off sooner, press
to turn on your
ON/C
ON/C
again.
OFF
.
USING THE +/– KEY
Press
ative or from negative to positive. When the number is negative,
– appears on the left side of the display.
to change the displayed number from positive to neg-
+/–
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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 (
the correct function key and continue your calculation.
, ××××, ÷), simply press
+, –
E appears 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 Calculation 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
E appears, press
to clear the error.
ON/C
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