Cat. No. 65-534 OWNER’S MANUAL Please read before using this equipment.
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.
CONTENTS Operation ............................................................................... 4 Turning the Calculator On and Off .............................................................................. 4 Using the +/– Key ............................................................ 4 Correcting Entry Errors .................................................... 5 Estimating Calculation Results ................................. 6 Calculation Examples ................................................
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 calculator automatically turns off. To turn it off sooner, press OFF. USING THE +/– KEY Press +/– to change the displayed number from positive to negative or from negative to positive. When the number is negative, – appears on the left side of the display.
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. E appears in the lower left corner when: • A calculation result exceeds 10 digits to the left of the decimal point. This is an overflow error. See “Estimating Calculation Results” on Page 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 following these steps. 1. Count the number of digits displayed to the left of the decimal 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 E 251.0142064 appears, the approximate answer is 2,510,142,064,000. If E 17319.
CALCULATION EXAMPLES You can perform basic calculations (addition, subtraction, and so on) with this calculator as you would with most other calculators. The following sections include examples of more advanced 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.
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: 2 2×4= 8. = 16. = 32. 3+6= 9. = 15. = 21. 50 – 5 = 45. = 40. = 35. 48 ÷ 2 = 24. = 12. = 6.
Percentage Example: 20% of 720 is 144. You Press You See 720 × 20 % 144. Add-On Example: 30% added to 540 is 702. You Press You See 540 + 30 % 702. Discount Example: 800 discounted by 20% is 640. You Press You See 800 – 20 % 640.
Reciprocal Example: 1/8 = 0.125 You Press You See 1÷8= 0.125 Exponent 6 Example: 7 = 117649 You Press You See 7×===== , 117 649. Square 2 Example:4 = 16 10 You Press You See 4×= 16.
Square Root Example: 16 = 4 You Press 16 = You See 4. Memory Calculations To store a value in memory, first press ON/C to clear all calculations and MC (memory clear) to clear the memory. Then enter the number or calculation and press M+. Note: Each time you press M+, M–, or MR, M appears in the upper left corner of the display with the number to show that a value is stored in memory. To add a value to memory, enter the number or calculation you want to add, then press M+.
Example: 2392 + 576 ————— – 73 = –64.61582 786 – 432 You Press You See ON/C MC 0. 786 M+ M 786. 432 M– 576 ÷ M 432. , M 2 392. , M 2 968. MR M 354. – M 8.38418079 73 = M –64.
CARE To enjoy your RadioShack EC-2037 calculator for a long time: • Keep the calculator dry. If it gets wet, wipe it dry immediately. • 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 calculator with a damp cloth occasionally to keep it looking new. Modifying or tampering with the calculator’s internal components can cause a malfunction and invalidate its warranty.
REPLACING THE BATTERY Although your calculator uses solar power most of the time, the backup battery will eventually become weak and need replacing. If the display speed slows down in a dimly-lit room, replace the battery with a RadioShack 389A type button-cell battery. Caution: Always use a fresh battery of the required size and type. 1. Use a Phillips screwdriver to remove the two screws on the back cover of the calculator, then lift off the cover. 2. Gently pry out the old battery.
SPECIFICATIONS Power Source ......................................................... Solar Panel or One 389A Button-Cell Battery Operating Temperature ......................................... 32° to 104°F (0° to 40°C) Dimensions (HWD) ....................... 611/16 × 451/64 × 119/64 Inches (17 × 12.2 × 3.3 cm) Weight (with Battery) ....................................................... 6.7 oz (190 g) Battery Life ..................................................
Limited Ninety-Day Warranty This product is warranted by RadioShack against manufacturing defects in material and workmanship under normal use for ninety (90) days from the date of purchase from RadioShack company-owned stores and authorized RadioShack franchisees and dealers.
