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65-754.fm Page 1 Friday, August 27, 1999 1:17 PM
Cat. No. 65-754
OWNER’S MANUAL
Please read before
using this equipment.
EC-3031
Handheld Printing
Calculator
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65-754.fm Page 2 Friday, August 27, 1999 1:17 PM FEATURES Your RadioShack EC-3031 Handheld Printing Calculator is a full-featured cal- culator designed for accuracy and ease of use. The EC-3031 can perform many different types of calculations, including percentage add-ons, discounts, and much more. The print function produces a permanent record of each entry and calculation result for later reference. With its small size, the EC-3031 fits easily into a briefcase or travel bag for people on th
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65-754.fm Page 3 Friday, August 27, 1999 1:17 PM Paper Feed Key — lets you quickly ad- vance the print paper without affecting calculations. Non-Add Print Key — lets you print dates, code numbers, or other refer- ence numbers without affecting the cal- culations. You can also print out only the calculation results. Two-Way Paper Feed — lets you feed paper from an internal compartment or from a convenient fold-out roll holder. Two Power Sources — let you power your calculator from four AA batt
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65-754.fm Page 4 Friday, August 27, 1999 1:17 PM THE FCC WANTS YOU TO KNOW This equipment complies with the limits for a Class B digital device as specified in Part 15 of FCC Rules. These limits provide reasonable protection against radio and TV interference in residential areas. However, your calculator might cause TV or radio interference even when it is operating properly. To elimi- nate interference, try one or more of the following corrective measures: • Reorient or relocate the receivi
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65-754.fm Page 5 Friday, August 27, 1999 1:17 PM CONTENTS Preparation ...................................... 6 Choosing a Power Source ............. 6 Installing Batteries .................... 6 Using AC Power ........................ 9 Installing the Paper Roll .............. 12 Operation ....................................... 16 Turning the EC-3031 On/Off ........ 16 Printing ........................................ 17 Printing a Displayed Value ...... 18 Rounding .........................
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65-754.fm Page 6 Friday, August 27, 1999 1:17 PM 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 AC adapter. Installing Batteries You can power your calculator from four AA batteries. We recommend alkaline batteries, such as RadioShack Cat. No. 23-552. You can also use rechargeable nickel-cadmium batterie
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65-754.fm Page 7 Friday, August 27, 1999 1:17 PM 1. Slide the battery compartment cover in the direction of the arrow and remove it. 2. Install the batteries as indicated by the polarity symbols (+ and –) marked inside the compartment. Cautions: • Use only fresh batteries of the required size and type. • Never mix fresh and old batter- ies, alkaline and nickel-cad- mium batteries, or rechargeable batteries of different capacities. 7
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65-754.fm Page 8 Friday, August 27, 1999 1:17 PM 3. Replace the cover. 4. Press AC to turn power on, then press RESET with a straightened paper clip to clear the calculator. Replace the batteries when the printing speed slows or the display dims. Cautions: • If you do not plan to use the calcu- lator for a month or more, or you plan to use only an AC adapter, remove and store the batteries. • Always dispose of old batteries promptly and properly. 8
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65-754.fm Page 9 Friday, August 27, 1999 1:17 PM • Never heat, disassemble, or throw batteries into a fire. • Never leave dead, old, or weak bat- teries in the calculator. They can leak chemicals that corrode or damage electronic circuits. Important: This calculator is capable of using rechargeable nickel-cadmium batteries. At the end of the batteries’ useful life, they must be recycled or dis- posed of properly. Contact your local, county, or state hazardous waste man- agement authorities fo
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65-754.fm Page 10 Friday, August 27, 1999 1:17 PM Cautions: • You must use an AC adapter that supplies 6 volts and delivers at least 300 milliamps. Its center tip must be set to negative, and its plug must correctly fit the calcula- tor’s jack. The recommended adapter meets these specifications. Using an adapter that does not meet these specifications could damage the calculator or the adapter. • When you finish using the AC adapter, disconnect it from the AC outlet first, then unplug it from
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65-754.fm Page 11 Friday, August 27, 1999 1:17 PM 1. Attach the 5.5 mm outer diameter/ 2.1 mm inner diameter barrel plug to the adapter cord, matching TIP on the plug’s side with –NEG on the cord. 2. Set the adapter’s voltage switch to 6V. 3. Insert the adapter’s barrel plug into the calculator’s jack. Note: Battery power automatically disconnects when you connect an AC adapter to the calculator. 4. Plug the other end of the adapter into a standard AC outlet. 11
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65-754.fm Page 12 Friday, August 27, 1999 1:17 PM INSTALLING THE PAPER ROLL Note: If the paper roll does not fit inside the paper roll compartment, you can use the external roll holder until the roll is 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- ment cover and lift it off. 12
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65-754.fm Page 13 Friday, August 27, 1999 1:17 PM 3. Cut across the paper to form a straight end. 4. Insert the paper. • Insert the end of the paper into the slot inside the compartment. • To use the external roll holder, insert the end of the paper into the rear slot from the bottom of the calculator. Then insert the end of the paper into the slot inside the compartment. Be sure the paper feeds from underneath the paper roll. 13
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65-754.fm Page 14 Friday, August 27, 1999 1:17 PM 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 slip the paper roll onto it. 14
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65-754.fm Page 15 Friday, August 27, 1999 1:17 PM 7. Replace the cover, threading the paper through the slot. Replace the paper roll when you see a red strip on one edge of the paper. Use 1 a standard 2 /4-inch paper roll, such as Cat. No. 65-710 or 65-715. 15
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65-754.fm Page 16 Friday, August 27, 1999 1:17 PM 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 for about 6 minutes. Press AC to turn it back on. Note: All previous entries are cleared when the calculator turns off. 16
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65-754.fm Page 17 Friday, August 27, 1999 1:17 PM PRINTING The EC-3031 can print and display all calculator entries and results, or simply display entries and results without print- ing them. You can also print a date, a reference or code number, and so on, without affecting the calculations in progress. Note: The calculator’s input buffer holds up to 7 key operations, so you can enter calculations even while the calculator is printing. To print, press PRT. PRT appears on the display, and the
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65-754.fm Page 18 Friday, August 27, 1999 1:17 PM To simply display entries and results without printing them, press PRT again. PRT disappears from the display and the calculator displays your entries and results, but does not print them. Printing a Displayed Value To print a displayed value even when the print function is turned off, press P/#. If the display is showing a calculation result, the EC-3031 prints that number right-justified. If the display is showing your entry, the EC-3031 pr
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65-754.fm Page 19 Friday, August 27, 1999 1:17 PM ROUNDING The RND key determines where the decimal appears on the display. Each time 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 calculation re- sults to two decimal places. If the third number to the right of the decimal is 5 or greater, the final calculation rounds up. If the
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65-754.fm Page 20 Friday, August 27, 1999 1:17 PM down. The entries and intermediate results appear with floating decimal points. Select CUT to limit final calculation re- sults to two decimal places with no rounding. The entries and intermediate results appear with floating decimal points. 20
