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Resumen del manual
65-538 OWNER’S MANUAL Please read before using this equipment. EC-252 Metric Conversion Calculator 65-538.fm Page 2 Monday, December 13, 1999 9:15 AM INTRODUCTION Your EC-252 Metric Conversion Calculator conveniently combines an internal battery and a solar panel, so you can use the calculator anywhere. It also has a three-key memory system so you can add, subtract, and recall a calculated figure. In addition to performing standard calculations, your calculator has dual-function keys to perform 20 built-in metric conversion calculations. CONTENTS Keys and Functions ............................ 3 Operation .............................................. 7 Turning on the EC-252 ................... 7 Correcting Entry Errors ................... 7 Calculation Errors ........................... 8 Using the +/– Key ......................... 10 Calculation Examples ................... 10 Memory Calculations .................... 14 Conversion ................................... 16 Care ..................................................... 22 Replacing the Battery ................... 23 Specifications .................................... 26 ©1999 Tandy Corporation. All Rights Reserved. RadioShack is a registered trademark used by Tandy Corporation. 2 65-538.fm Page 3 Monday, December 13, 1999 9:15 AM KEYS AND FUNCTIONS — Converts standard to metric measurements. — Converts metric to standard measurements. +/– (°F °C) — Changes a displayed number from positive to negative and vice versa. Also converts Fahrenheit to Celsius and vice versa. 3 15 AM 65-538.fm Page 4 Monday, December 13, 1999 9: 2 . (acre m ) — Performs the division function. Also converts acres to square meters and vice versa. ON/C — Turns on power. Also clears the last entry when pressed once and clears the whole calculation when pressed twice. 7 (in cm) — Enters 7. Also converts inches to centimeters and vice versa. 8 (ft m) — Enters 8. Also converts feet to meters and vice versa. 9 (mile km) — Enters 9. Also converts miles to kilometers and vice versa. . ((. ... (((acre hectare) — Performs the multiplication function. Also converts acres to hectares and vice versa. MRC — (Memory Recall/Clear) Recalls an answer from memory when you press it once. Clears the memory when you press it twice. 4 65-538.fm Page 5 Monday, December 13, 1999 9:15 AM 4 (in 2 cm 2 ) — Enters 4. Also converts square inches to square centimeters and vice versa. 22 5 (ft m ) — Enters 5. Also converts square feet to square meters and vice versa. 22 6 (mile km ) — Enters 6. Also converts square miles to square kilometers and vice versa. – (fl. oz ml) — Performs the subtraction function. Also converts fluid ounces to milliliters and vice versa. M– (Imp.ton kg) — Subtracts from and keeps the answer in memory. Also converts imperial tons to kilograms and vice versa. 33 1 (in cm ) — Enters 1. Also converts cubic inches to cubic centimeters and vice versa. 33 2 (ft m) — Enters 2. Also converts cubic feet to cubic meters and vice versa. 5 9:15 AM 65-538.fm Page 6 Monday, December 13, 1999 3 (gal l) — Enters 3. Also converts US gallons to liters and vice versa. M+ (yard m) — Adds and stores a calculation answer in memory. Also converts yards to meters and vice versa. 0 (oz g) — Enters 0. Also converts ounces to grams and vice versa. . (lb kg) — Enters the decimal point. Also converts pounds to kilograms and vice versa. = (Imp.gal l) — Gives the answer to a calculation. Also converts Imperial gallons to liters and vice versa. + (Imp.fl. oz ml) — Performs the addition function. Also converts Imperial fluid ounces to milliliters and vice versa. % (KJ KC) — Figures percentages. Also converts kiloJoules to kilocalories and vice versa. 6 65-538.fm Page 7 Monday, December 13, 1999 9:15 AM OPERATION TURNING ON THE EC-252 Press ON/C to turn on the calculator. Notes: • The calculator turns off automatically if you do not press any key within about 11 minutes. • When you turn the calculator off, previous entries are cleared. CORRECTING ENTRY ERRORS If you enter an incorrect value, press ON/C once. Then enter the correct value and continue your calculation. 7 15 AM 65-538.fm Page 8 Monday, December 13, 1999 9: To clear the display for a new calculation, press ON/C twice. 0. appears, then begin the new calculation. If you press an incorrect operator key (+, –, . .... , .), simply press the correct key and continue your calculation. CALCULATION ERRORS ERROR appears in the upper left corner when: • A calculation result exceeds 8 digits to the left of the decimal point. This is an overflow error (see “Estimating Calculation Results”). • A memory calculation result exceeds 8 digits to the left of the decimal point. Memory contents remain unchanged. • You try to divide by 0. To clear an error, press ON/C. 8 9:15 AM 65-538.fm Page 9 Monday, December 13, 1999 Estimating Calculation Results If you perform a calculation that results in an overflow error, you can estimate the correct result (to 8 significant digits...