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Radio Shack EC-2037 - page 1
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 Displ ay ...
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Radio Shack EC-2037 - page 2
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 b uilt-in solar panel p rovides power when you expose the calc ulator to light. When the surroundi ng light is not bright enough, the supplied inte rnal battery provides the power. The calculator’s ...
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Radio Shack EC-2037 - page 3
3 CONTENTS Operation ................. ... ... ......................... ... ......................... ... 4 T urnin g the Calculator On and Of f ............. .......................... ........... ........... .............. ... 4 Using the +/– Key ............ ........... ... ........... ... ........... ... ...... 4 Correcting Entry Errors .... ...
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Radio Shack EC-2037 - page 4
4 OPERATION T URNING THE CALCULATOR ON AND OFF Press ON/C to turn on your calculator , then tilt the disp lay to the be st viewin g 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 + ...
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Radio Shack EC-2037 - page 5
5 CORRECTING ENTRY ERRORS If you enter an incorre ct value, press CE once. Then enter the correct value and conti nue your calculatio n. If you press an incorrect function key ( + , – , × × × × , ÷ ), simply press the correct function key and continue your calculatio n. E appears in the lower left corner when: • A calculation result e xce ...
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Radio Shack EC-2037 - page 6
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 numb er 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 ...
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Radio Shack EC-2037 - page 7
7 CALCULATION EXAMPLES You can perform basic calculations (add ition, subtraction, and so on) with this calculator as you would with most other calcula- tors. The following section s include examples of more ad- vanced calculations. Mixed Calculations Example: 256 + 378 – 223 × 2.3 ÷ 2.5 + 24 – 36 = Y ou Press: Y ou See: 256 + 378 = 634. – ...
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Radio Shack EC-2037 - page 8
8 Constants For multiplication, th e first value you enter is the constant. For addition, subtraction, and division, the second value you enter is the constant. Constant: Y ou Press: Y ou See: 22 × × × × 4 = 8. = 16. = 32. 63 + 6 = 9. = 15. = 21. 5 50 – 5 = 45. = 40. = 35. 2 48 ÷ 2 = 24. = 12. = 6. ...
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Radio Shack EC-2037 - page 9
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. Y ou Press Y ou See 720 × × × × 20 % 144. Y ou Press Y ou See 540 + 30 % 702. Y ou Press Y ou See 800 – 20 % 640. ...
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Radio Shack EC-2037 - page 10
10 Reciprocal Example: 1 / 8 = 0.125 Exponent Example: 7 6 = 117649 Square Example:4 2 = 16 Y ou Press Y ou See 1 ÷ 8 = 0.125 Y ou Press Y ou See 7 × = = = = = 117 , 649. Y ou Press Y ou See 4 × = 16. ...
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Radio Shack EC-2037 - page 11
11 Square Root Example: = 4 Memory Calculations To store a value in memory, first press ON/C to clear all calcula- tions and MC (memory clear) to clear the memory. Then enter the number or calculation and press M+ . Note: Each ti me yo u press M+ , M – , or MR, M appears in the up - per left corner of the display with the number to show that a va ...
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Radio Shack EC-2037 - page 12
12 Example: 2392 + 576 ————— – 73 = –64.61582 786 – 432 Y ou Press Y ou See ON/C MC 0. 786 M+ M 786. 432 M– M 432. 2392 + M 2 , 392. 576 ÷ M 2 , 968. MR M 354. – M 8.38418079 73 = M –64.61581921 ...
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Radio Shack EC-2037 - page 13
13 CARE To enjoy your RadioShack EC-2037 calculator for a long time : • Keep the calculator dry . If it gets wet, wipe it dry immedi- ately . • Use and store the calculator only in normal temperature environments. • Handle the calculator gently and carefully . Don’t drop it. • Keep the calculator away from dust and dirt. • Wipe the calc ...
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Radio Shack EC-2037 - page 14
14 REPLACING THE BATTERY Although your calculator uses solar power most of the time, the backup battery will eventually become wea k and need replac- ing. If the display speed sl ows down in a dimly-lit room, replace the battery with a RadioShack 389A type button-cell ba ttery. Caution: Always use a fresh battery of the required size and type. 1. U ...
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Radio Shack EC-2037 - page 15
15 SPECIFICATIONS Power Source .............. .............. .............. .............. . Solar Panel or One 389A Bu tton-Cell Battery Operating T emperature .............. .............. ............. 32° to 104°F (0° to 40°C) Dimensions (HWD) .............. ......... 6 11 / 16 × × × × 4 51 / 64 × × × × 1 19 / 64 Inches (17 × × × ...
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Radio Shack EC-2037 - page 16
RadioShack A Division of T andy Corporation Fort Worth, T exas 76102 RS65-634O/M 12A99 Printed in Hong Kong Limited Ninety-Day W arran ty This product is warrante d by RadioShack against ma nufacturing def ects in material and work- manship under nor mal use for nine ty (90) days from the da te of purchase from RadioShack company-owne d stores and ...
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