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User Manual

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DoubleCheck XL

Commercial Calculator for

Visually Impaired People

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Summary of Contents for DoubleCheck

Page 1: ...User Manual ___________________________________________________________________________________________ DoubleCheck XL Commercial Calculator for Visually Impaired People...

Page 2: ...8 4 10 3 Delete Stored Values page 8 4 11 Repeat Function page 8 4 12 Backlit Display option page 8 5 Arithmetic Procedures page 8 5 1 Standard Arithmetic Functions page 8 5 2 Advanced Arithmetic Fun...

Page 3: ...ety Instructions page 13 9 Cleaning the Device page 14 10 Technical Data page 14 11 Guarantee and Service page 14 12 Disposal page 15 12 1 Disposal of Electronic Devices page 15 12 2 Battery Disposal...

Page 4: ...nversion of currency and physical units Date and time with alarm clock function Volume control in 6 steps 1 2 XL Product Series XL calculators are available in the following versions Non talking Non t...

Page 5: ...urn over the device with the high position end showing to the right side In the middle of the bottom side you can feel a little notch This is where you can open the battery compartment Please note tha...

Page 6: ...on without backlit display row 2 Increase volume row 3 Decrease volume row 4 Repeat input 4 2 3 x 3 Group from left to right row 1 short time long date short recall memory long save value short on del...

Page 7: ...umber incorrectly you can always delete the last digit or the complete number Press the ON key short and the complete number will be deleted press the On key long and only the last digit will be delet...

Page 8: ...M will disappear from the display 4 11 Repeat Function By pressing the Repeat key Auxiliary key row 4 or by pressing the Menu key short 3 x 3 group row 2 column 2 the entire entry will be repeated ev...

Page 9: ...2 right key followed by the digit 5 Finish the process by shortly pressing the percent key 3 x 3 group row 3 right key DoubleCheck XL will then announce the result 5 2 2 Square a Given Number To squa...

Page 10: ...als 86 degrees Fahrenheit To re convert this result to degree Celsius press both the equals key and the plus key 4 x 4 group row 4 columns 3 and 4 5 3 1 Currency Conversion The default exchange rate E...

Page 11: ...know you will need a certain amount of money in the near future end capital and you know that your bank offers you a certain interest rate percent for a certain duration for e g 5 years After typing i...

Page 12: ...ercentage and ask you to type in the duration Do so once more and confirm with a short press of the Menu key DoubleCheck XL then will announce the initial capital 6 Help Mode Pressing the keys FIN and...

Page 13: ...L offers you the possibility to round a number This can be helpful when using big values e g in the millions as DoubleCheck XL will then automatically round the value and not announce the entire numbe...

Page 14: ...s e g CDs memory cards etc and batteries Under this guarantee CareTec shall repair a unit that is found to be defective free of charge or at its option replace it by a reconditioned one In no event sh...

Page 15: ...13 Manufacturer This product must be disposed of separately from household waste at specially designated collection and recycling points Please dispose used batteries only at specially designated col...

Page 16: ...16 DoubleCheck XL 12 2011...

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