RadioShack EC-3031 - Manual

6 PREPARATION CHOOSING A POWER SOURCE You can power your calculator from: • Four AA batteries (not supplied) • Standard AC power, using an AC adapter (not supplied) If you plan to use the print function fre-quently, we suggest you use an ACadapter. Installing Batteries You can power your calculator ...

9 • Never heat, disassemble, or throw batteries into a fire. • Never leave dead, old, or weak bat- teries in the calculator. They canleak chemicals that corrode ordamage electronic circuits. Important: This calculator is capable ofusing rechargeable nickel-cadmiumbatteries. At the end of the batteri...

12 INSTALLING THE PAPER ROLL Note: If the paper roll does not fit insidethe paper roll compartment, you canuse the external roll holder until the rollis small enough to fit inside the com-partment (about one-inch diameter). 1. Press AC to turn on the calculator. 2. Slide open the paper roll compart-...

14 5. Press FEED to advance the paper. 6. Install the paper roll. • Place the paper roll inside the paper roll compartment. • To use the external paper roll holder, raise the holder and slipthe paper roll onto it. 65-754.fm Page 14 Friday, August 27, 1999 1:17 PM

15 7. Replace the cover, threading the paper through the slot. Replace the paper roll when you see ared strip on one edge of the paper. Usea standard 2 1 / 4 -inch paper roll, such as Cat. No. 65-710 or 65-715. 65-754.fm Page 15 Friday, August 27, 1999 1:17 PM

16 OPERATION TURNING THE EC-3031 ON/OFF Press AC to turn on the EC-3031. Press OFF to turn it off. To save power, the EC-3031 automati-cally turns off if you do not use it forabout 6 minutes. Press AC to turn it back on. Note: All previous entries are clearedwhen the calculator turns off. 65-754.fm ...

17 PRINTING The EC-3031 can print and display allcalculator entries and results, or simplydisplay entries and results without print-ing them. You can also print a date, areference or code number, and so on,without affecting the calculations inprogress. Note: The calculator’s input bufferholds up to ...

18 To simply display entries and resultswithout printing them, press PRT again. PRT disappears from the display and the calculator displays your entries andresults, but does not print them. Printing a Displayed Value To print a displayed value even whenthe print function is turned off, press P/# . I...

19 ROUNDING The RND key determines where the decimal appears on the display. Eachtime you press RND , the display chang- es from F to 5/4 to CUT . Select F to display a floating decimal point. The calculator uses the full 10-digit display to show your calculation re-sults. Select 5/4 to round final ...

20 down. The entries and intermediateresults appear with floating decimalpoints. Select CUT to limit final calculation re- sults to two decimal places with norounding. The entries and intermediateresults appear with floating decimalpoints. 65-754.fm Page 20 Friday, August 27, 1999 1:17 PM

21 CORRECTING ENTRY ERRORS If you enter an incorrect value, press C once. Then enter the correct value andproceed with your calculation. If you press an incorrect function key (+,–, × , ÷ ), simply press the correct key and continue. 65-754.fm Page 21 Friday, August 27, 1999 1:17 PM

23 3. Add to the right of the number as many zeros as there were digits tothe left of the decimal point. For example, the displayed valueE1.014206404 is estimated toequal 10,142,064,040 (one zeroadded). 4. Press C to clear the error. CALCULATION EXAMPLES Basic Calculations 65-754.fm Page 23 Friday, ...

24 Constant Calculations Press the function key ( ÷ , × , –, +) twice to make the following value a constant. Note: A K appears on the display when you use a constant. 65-754.fm Page 24 Friday, August 27, 1999 1:17 PM

26 Memory Calculations The memory calculation feature lets youeasily do multi-step calculations. Usethe following keys for memory calcula-tions. To store a value in memory, first press AC then MC to clear the memory. Then enter the number or calculation andpress M+ . To add a value to the current me...

28 Percentage Calculations 12% of 1500 What percentage of 880 is 660? 65-754.fm Page 28 Friday, August 27, 1999 1:17 PM

30 Markup Calculations What will the selling price and profit bewhen the purchasing price of an item is$480 and the gross profit margin is25%? 65-754.fm Page 30 Friday, August 27, 1999 1:17 PM

31 CARE Your RadioShack EC-3031 HandheldPrinting Calculator is an example of su-perior design and craftsmanship. Thefollowing suggestions will help you carefor the calculator so you can enjoy it foryears. • Keep the calculator dry. If it gets wet, wipe it dry immediately. Liq-uids can contain minera...

32 Modifying or tampering with the calcula-tor’s internal components can cause amalfunction and might invalidate itswarranty and void your FCC authoriza-tion to operate it. If your calculator is notperforming as it should, take it to yourlocal RadioShack store for assistance. REPLACING THE INK ROLLE...

35 SPECIFICATIONS Ambient Temperature Range: 32–104°F (0–40°C) Battery Life .............. About 4,000 lines of printing Power ................. 4 AA batteries (1.5 V) Optional AC Adapter (Cat. No. 273–1664) Dimensions(HWD including roll holder): 1 9 / 16 × 3 7 / 8 × 7 9 / 16 Inches (39 × 98 × 192 m...

36 NOTES 65-754.fm Page 36 Friday, August 27, 1999 1:17 PM

39 Limited One-Year Warranty This product is warranted by RadioShack againstmanufacturing defects in material and workmanshipunder normal use for one (1) year from the date ofpurchase from RadioShack company-owned storesand authorized RadioShack franchisees and deal-ers. EXCEPT AS PROVIDED HEREIN, R...

RadioShack A Division of Tandy Corporation Fort Worth, Texas 76102 6A7 Printed in China ( continued ) In the event of a product defect during the warrantyperiod, take the product and the RadioShack salesreceipt as proof of purchase date to any Ra-dioShack store. RadioShack will, at its option, un-le...