RadioShack EC-252 - Manuals

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...

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...

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...

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 ...

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...

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

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 ...

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 ÷ ...

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 ...

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

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

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

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...

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...

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...

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...

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...