Assessments - 2, GPA: 4.5
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65-754 OWNER’S MANUAL Please read before using this equipment. EC-3031 Handheld Printing Calculator 65-754.fm Page 2 Friday, August 27, 1999 1:17 PM FEATURES Your RadioShack EC-3031 Handheld Printing Calculator is a full-featured calculator 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 the go. Its features include: Percentage Calculations — make determining percentages and taxes simple. Four-Key Memory — lets you save subtotals, then add to, subtract from, and recall them for additional calculations. Round-Off Key — lets you set the calculator to round up or down at two decimal places, or use a full floating decimal point. © 1997 Tandy Corporation. All Rights Reserved. RadioShack is a trademark used by Tandy Corporation. 2 65-754.fm Page 3 Friday, August 27, 1999 1:17 PM Paper Feed Key — lets you quickly advance the print paper without affecting calculations. Non-Add Print Key — lets you print dates, code numbers, or other reference numbers without affecting the calculations. 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 batteries or standard AC power (with an optional AC adapter). Automatic Power Off — conserves battery power by turning off the calculator about 6 minutes after the last entry. Before you begin using your new EC3031, we recommend you completely read through this manual and familiarize yourself with the calculator’s many functions and features. 3 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 eliminate interference, try one or more of the following corrective measures: • Reorient or relocate the receiving antenna. • Increase the distance between the calculator and the radio or TV. • Use outlets on different electrical circuits for the calculator and the radio or TV. Consult your local RadioShack store if the problem still exists. 4 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 ..................................... 19 Correcting Entry Errors ............... 21 Correcting Calculation Errors ...... 22 Estimating Calculation Results .... 22 Calculation Examples .................. 23 Basic Calculations .................. 23 Constant Calculations ............. 24 Memory Calculations .............. 26 Percentage Calculations ......... 28 Markup Calculations ............... 30 Care ................................................ 31 Replacing the Ink Roller .............. 32 Resetting the Calculator .............. 34 Specifications ................................ 35 5 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 frequently, 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 batteries (Cat. No. 23125) with a battery charger (Cat. No. 23-133). 6 65-754.fm Page 7 Friday, August 27, 1999 1:17 PM 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 batteries, alkaline and nickel-cadmium batteries, or rechargeable batteries of different capacities. 7 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 calc...