Page 2 - INTRODUCTION; CONTENTS
2 INTRODUCTION Your EC-252 Metric Conversion Calculatorconveniently combines an internal batteryand a solar panel, so you can use the cal-culator anywhere. It also has a three-keymemory system so you can add, subtract,and recall a calculated figure. In addition toperforming standard calculations, yo...
Page 3 - KEYS AND FUNCTIONS; — Converts standard to metric mea-
3 KEYS AND FUNCTIONS — Converts standard to metric mea- surements. — Converts metric to standard mea- surements. +/– ( °F °C ) — Changes a displayed number from positive to negative and viceversa. Also converts Fahrenheit to Celsiusand vice versa. 65-538.fm Page 3 Monday, December 13, 1999 9:15 AM
Page 4 - acre
4 ÷ ( acre m 2 ) — Performs the division function. Also converts acres to squaremeters and vice versa. ON/C — Turns on power. Also clears the last entry when pressed once and clearsthe whole calculation when pressed twice. 7 ( in cm ) — Enters 7 . Also converts inches to centimeters and vice versa. ...
Page 7 - OPERATION; TURNING ON THE EC-252
7 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 about11 minutes. • When you turn the calculator off, previ- ous entries are cleared. CORRECTING ENTRY ERRORS If you enter an incorrect value, pre...
Page 8 - CALCULATION ERRORS; ERROR
8 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 con- tinue your calculation. CALCULATION ERRORS ERROR appears in the upper left corner when: • A cal...
Page 9 - Estimating Calculation Results; Count the number of digits displayed; is estimated to equal
9 Estimating Calculation Results If you perform a calculation that results inan overflow error, you can estimate the cor-rect result (to 8 significant digits) by follow-ing these steps. 1. Count the number of digits displayed to the left of the decimal point. 2. Remove the decimal point. 3. Add as m...
Page 10 - MINUS; appears for a negative; CALCULATION EXAMPLES; Basic
10 USING THE +/– KEY Press +/– to change the displayed value from positive to negative or from negativeto positive. Note: MINUS - appears for a negative value. CALCULATION EXAMPLES Basic You Press You See 256 + 378 = 634. 471 – 223 = 248. 15.5 × 2.3 = 35.65 17.2 ÷ 2.5 = 6.88 24 + 24. 65-538.fm Page ...
Page 11 - Constants
11 Constants For multiplication, the first value you enter isthe constant. For addition, subtraction, anddivision, the second value you enter is theconstant. 36 – 60. 75 × MINUS – 15. 8 ÷ MINUS – 120. 9 = MINUS – 13.333333 You Press You See 5 ×××× 7 = 35. 9 = 45. 10 = 50. 100 ÷ 5 = 20. You Press You...
Page 12 - Percentage
12 Percentage Example: 20% of 720 is 144. Add-On Example: 30% added to 540 is 702. 200 = 40. 300 = 60. You Press You See 720 × 20 % 144 You Press You See 540 + 30 % 702. You Press You See 65-538.fm Page 12 Monday, December 13, 1999 9:15 AM
Page 14 - MEMORY CALCULATIONS; MEMORY
14 MEMORY CALCULATIONS To store a value in memory, first press MRC (memory recall/clear) twice to clear the memory, then press ON/C to clear all calculations. To add a value to memory, enter the num-ber or calculation you want to add, thenpress M+ . The calculator totals the current calculation (if ...
Page 15 - To recall the value from memory, press; To clear the contents in memory, press; twice so
15 To recall the value from memory, press MRC once. The memory value appears. To clear the contents in memory, press MRC twice so MEMORY disappears. Example: 2392 + 576 ————— – 73 = –64.61582 786 – 432 You Press You See MRC MRC ON/C 0. 786 M+ MEMORY 786. 432 M– MEMORY 432. 2392 + MEMORY 2392. 576 ÷ ...
Page 16 - CONVERSION; and; is printed above
16 CONVERSION and let you select the conversion di- rection — to metric or from metric. Thesymbols above each key show you whichconversion each key makes. For example, in cm is printed above 7 . To convert 12 inches into centimeters, press 12 7 . 12 inches = 30.48 centimeters. To convertcentimeters ...
Page 17 - Length
17 Length Example: 5.5 cm = ? in Example: 7 5 / 8 in = ? cm Example: 12.8 m = ? ft You Press You See 5.5 in cm (7) 2.1653543 You Press You See 5 ÷ 8 + 7 = in cm (7) 19.3675 You Press You See 12.8 ft m (8) 41.99475 65-538.fm Page 17 Monday, December 13, 1999 9:15 AM
Page 18 - Weight
18 Example: 54 yd = ? m Weight Example: 630 lb = ? kg Example: 1 lb = ? kg You Press You See 54 yard m (M+) 49.3776 You Press You See 630 lb kg (.) 285.768 You Press You See 1 lb kg (.) 0.4536 65-538.fm Page 18 Monday, December 13, 1999 9:15 AM
Page 19 - Volume
19 Volume Example: 389 ft 3 = ? m 3 Example: 100 ml = ? (US) fl. oz Example: 245 (US) gal = ? l You Press You See 389 ft 3 m 3 (2) 11.015313 You Press You See 100 fl. ml (–) 3.3813484 You Press You See 245 gal l (3) 927.423 oz 65-538.fm Page 19 Monday, December 13, 1999 9:15 AM
Page 22 - CARE
22 CARE To enjoy your EC-252 Metric ConversionCalculator 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 care- fully. Don’t drop it. • Keep the calculator a...
Page 23 - REPLACING THE BATTERY; Follow these steps to replace the battery.
23 REPLACING THE BATTERY Although your calculator uses solar powermost of the time, the backup battery willeventually become weak and need replac-ing. If the display speed slows down in adimly-lit room, replace the battery with a389A-type button-cell battery (RadioShackCat. No. 23-117). Caution: Use...
Page 26 - SPECIFICATIONS
26 SPECIFICATIONS Display ................................... 8-Digit LCD Solar CellMinimum Illumination .................. 150 LUX Battery ................... One 389A Button-Cell (Cat. No. 23-117) Battery Life .......................... About 1 Year Operation Temperature ........... 32°–104°F (0°C...
Page 27 - Limited One-Year Warranty
27 Limited One-Year Warranty This product is warranted by RadioShack against manu-facturing defects in material and workmanship under nor-mal use for one (1) year from the date of purchase fromRadioShack company-owned stores and authorized Ra-dioShack franchisees and dealers. EXCEPT AS PRO-VIDED HER...
Page 28 - We Service What We Sell
RadioShack A Division of Tandy Corporation Fort Worth, Texas 76102 07A99 Printed in China (Continued) become the property of RadioShack. New or reconditioned parts and products may be used in the per-formance of warranty service. Repaired or replaced partsand products are warranted for the remainder...
