Radio Shack EC-252 User Manual

Cat. No. 65-538OWNER’S MANUALPlease read before using this equipment.EC-252Metric Conversion Calculator65-538.fm Page 1 Monday, December 13, 1999 9

10USING THE +/– KEY Press +/– to change the displayed valuefrom positive to negative or from negativeto positive.Note: MINUS - appears for a negative

11ConstantsFor multiplication, the first value you enter isthe constant. For addition, subtraction, anddivision, the second value you enter is thecons

12Percentage Example: 20% of 720 is 144.Add-OnExample: 30% added to 540 is 702.200 = 40.300 = 60.You Press You See720 × 20 %144You Press You See540 +

13Discount Example: 800 discounted by 20% is 640.Reciprocal Example: 1/8 = 0.125Exponent Example: 76 = 117649You Press You See800 – 20 %640.You Press

14MEMORY CALCULATIONS To store a value in memory, first pressMRC (memory recall/clear) twice to clearthe memory, then press ON/C to clear allcalculati

15To recall the value from memory, pressMRC once. The memory value appears.To clear the contents in memory, pressMRC twice so MEMORY disappears.Exampl

16CONVERSION and let you select the conversion di-rection — to metric or from metric. Thesymbols above each key show you whichconversion each key m

17LengthExample: 5.5 cm = ? inExample: 75/8 in = ? cmExample: 12.8 m = ? ftYou Press You See5.5 in cm (7)2.1653543You Press You See5 ÷ 8 + 7 = in cm

18Example: 54 yd = ? mWeight Example: 630 lb = ? kgExample: 1 lb = ? kgYou Press You See54 yard m (M+)49.3776You Press You See630 lb kg (.)285.768

19Volume Example: 389 ft3 = ? m3Example: 100 ml = ? (US) fl. ozExample: 245 (US) gal = ? lYou Press You See389 ft3m3(2)11.015313You Press You See100fl

2INTRODUCTION Your EC-252 Metric Conversion Calculatorconveniently combines an internal batteryand a solar panel, so you can use the cal-culator anywh

20Temperature Example: 125°F = ? °CExample: –35°C = ? °FArea Example: 245 ft2 = ? m2You Press You See125 °F °C (+/–)51.666666You Press You See35 +/-

21Example: 1540 cm2 = ? ft2You Press You See1540 in2cm2 (4)238.7004765-538.fm Page 21 Monday, December 13, 1999 9:15 AM

22CARE 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 st

23REPLACING THE BATTERY Although your calculator uses solar powermost of the time, the backup battery willeventually become weak and need replac-ing.

242. Carefully insert a small, flat-bladescrewdriver between the lower casehalves, then slightly twist the screw-driver to separate the lower front an

25• Dispose of the old battery promptlyand properly. Do not burn or bury it.4. Position the new battery so the posi-tive (+) side is up, then insert i

26SPECIFICATIONS Display ... 8-Digit LCDSolar CellMinimum Illumination ... 150 LUXBattery ...

27Limited One-Year WarrantyThis product is warranted by RadioShack against manu-facturing defects in material and workmanship under nor-mal use for on

RadioShackA Division of Tandy CorporationFort Worth, Texas 7610207A99 Printed in China(Continued) become the property of RadioShack. New orrecondition

3KEYS AND FUNCTIONS — Converts standard to metric mea-surements. — Converts metric to standard mea-surements.+/– (°F °C) — Changes a displayednumber f

4÷ (acre m2) — Performs the divisionfunction. Also converts acres to squaremeters and vice versa.ON/C — Turns on power. Also clears thelast entry when

54 (in2cm2) — Enters 4. Also convertssquare inches to square centimeters andvice versa.5 (ft2m2) — Enters 5. Also convertssquare feet to square meters

63 (gal l) — Enters 3. Also converts USgallons to liters and vice versa.M+ (yard m) — Adds and stores a cal-culation answer in memory. Also convertsya

7OPERATION TURNING ON THE EC-252Press ON/C to turn on the calculator.Notes:• The calculator turns off automatically ifyou do not press any key within

8To clear the display for a new calculation,press ON/C twice. 0. appears, then beginthe new calculation.If you press an incorrect operator key (+, –,×

9Estimating Calculation Results If you perform a calculation that results inan overflow error, you can estimate the cor-rect result (to 8 significant