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FEATURES

Set the Alarm

1. Press ALARM
(You will see a A and  #. This will
tell you which song the alarm will
sound. 1-5 is your selection. To hear
the song just press any key between
1 and 5)  

2. Then Press SET once to select
the Hour, Twice to select the Minutes

3. To change the Hour or Minutes 
push the              buttons. Either to

go up   in numerical order or down   .

4. Once your desired time has been
selected, Press SET . 

To return to your clock Press TIME.
To check the alarm time Press ALARM twice.
To Turn  Alarm Off, Press  ALARM until
 you see the row of Dots, then Press TIME.

World Time for 16 cities.
Calander display featuring the month and day.
Alarm Clock with musical alarm sound.
Tax +, Tax- and Euro Exchange
Lighted Billboard when front cover is opened

Executive Desktop World Time Calendar and
Calculator, gives the time for 16 major cities
around the world and also functions as a 
10-Digit Calculator that calculates tax, tip,
sur-charge, and has Euro exhange feature..  
It also features a Calendar that gives the Month, 
Day of the Week, and Date.  The Lighted 
Billboard Picture Automatically lights
when the open button is pushed.

Executive Desktop World Time Calendar and Calculator

1.

2.

3.

Executive Desktop World Time Calendar and Calculator

To SET World Time and Calendar

DF-500

Push for 

Alarm Mode

To Replace Picture

Pull out top door and tilt unit until
picture slides out. Then replace.

5/20

MONTH   DATE

7

8

9

4

5

6

3

2

1

0

=

.

+

x

÷

DST

HOME

TAX–

TONE

TIME   ALARM    SET     DOWN     UP

DENVER      CHICAGO      NEW YORK      RIO DE JANEIRO

SYDNEY      WELLINGTON    HONOLULU    LOS ANGELES  

KARACHI     BANGKOK     HONG KONG      TOKYO

LONDON       PARIS      JERUSALEM     MOSCOW

%

TAX+

AM/PM

12/24

CAL ON
CE/AC

RATE

RATE

TIMER

FOREIGN

SUN

PM

Picture

A      4                   -    -     -

TIME   ALARM    SET     DOWN     UP

RATE

RATE

1. Press the time button to lock into TIME MODE
1. Select a City by pushing the button with the City's name on it.
2. Then push SET ,the HOUR should be blinking.
    (Hour is now selected)

Using the                buttons to change the time.

3. Press SET a 2nd time in order to Select the SECONDS

      Using the                buttons to change the time.

4. Pressing SET a 3rd time for MONTH
                              4th time for DAY, 
                              5th time for YEAR,
    

Using the                  buttons to change selected Area.

 

 

    

5. After the YEAR has been Selected, Press SET one more time
    to lock in the time.

At

 

Any time pressing TIME will Lock the settings

NOTE: 

After you Set the time for the City selected, All other City Times will change accordingly 

MILITARY TIME

1. Press the time button to lock into TIME MODE

2. Then push SET ,the HOUR should be blinking.
3.  Press the = key ( You will notice 12/24 on key.) This will lock
     the Time into MILITARY TIME

4.  If you want to return to AM/PM just press the    key 
     (AM/PM is marked on the key)

        At

 

Any time pressing TIME will Lock the settings

DAYLIGHT SAVINGS FEATURE

PM

In order to compensate for DAYLIGHT SAVINGS time.  The 
DST Button locks in the selected city in DAYLIGHT SAVINGS 
Mode.  The feature locks in one city at a time, So that the World 
Time is not effected.
For Example:

If you want to change New York time to DAYLIGHT SAVINGS,
Simply select New York then press the      DST button.  
New York is now locked in DAYLIGHT SAVINGS Mode. It will
Remain in this mode unless you press the     DST button to
release it.
NOTE: 

All other cities will remain in regular TIME Mode.  In that

case, in order to change all US cities, you must select each city
individualy and select the     DST Mode

PM

REGULAR MODE

DAYLIGHT SAVINGS MODE

DST

%

TIME   ALARM    SET     DOWN     UP

RATE

RATE

Push SET

Once for Hour, Twice for Minutes

TIME   ALARM    SET     DOWN     UP

RATE

RATE

Push    or    to change

Hour or Minutes

Set the Timer

12/24 hour (military time) setting option
Count Down Timer
Summer Savings Time
10 digit Touch-Tone Calculator
Currency Conversion

While in time mode press the TIMER button.Then press SET. 

(The minutse will be blinking.)

  Using the        to select number of 

minutes. Press SET again

(the hours will be blinking)

 Then using        to 

select hour. Press TIMER to lock time and a second time to
begin the countdown.
Press TONE for a beeping sound when TIMER is done.

TIMER

Executive Desktop World Time Calendar and Calculator

DF-500

BATTERY REPLACEMENT

1. Turn Calculator Over

2. Remove Battery  lower
    cover 

3. Replace Batteries following
    the Polarity Diagram Inside.
  
NOTE: Use  

1.

2.

3.

Warning: 

(Keep batteries out of the reach of children)

AAA Batteries

Remove Cover

Turn Over

AAA

AAA

Two AAA Batteries

PERFORMING CALCULATIONS

Press

Displayed

Addition (+) 

Example:

6 + 7 = 13.

[6] + [7] =

13

Subtraction (–)

Example:

10 – 4 = 6.

[1] [0] – [4] =

6

Multiplication (x)

Example:

7 x 5 = 35.

[7] x [5] =

35 

Example:

2

Percentages (%) 

Press

Displayed

Example:

Calculate 6% of 100.

[1] [0] [0] x [6] %

6

Example:

Add 6% tax to $20.

[2] [0] + [6] %

2 1 . 2

Example:

Calculate a 

20% discount from $150.

[1] [5] [0] – [2] [0] %

120

CONSTANT CALCULATIONS
Press = to repeat last function.

Example: 

Calculate 5 x 5 x 5 x 5 + 2 + 2 = 629

Press [5]   x   =   =   =  +  [2]  =  = 

629

TAX

TAX

 +

TAX

TAX

 +

VALUE CALCULATIONS

Setting TAX rate at 15%

   

Credit card charge is $300

SETTING THE TAX RATE   

   138.00  (Total of Tip )   

Once the TAX Rate is set, it will remain in memory until a new rate is entered

TAX

Dinner Bill is $120

120

Hold down            key for 3 seconds 
Key in rate     

TAX

18.00 (Tax $ = 15% of 120 )   

TAX

 +

In order to see Tax amount
 press          again and you will see Tax$ amount 

300          260.86 (Tax Excluded)

In order to see Tax amount 
 press          again you will see Tax$ amount

  Tip,Tax, Surcharge Rate

Example

1

5

How much is the total bill including Tax?

How much was the bill before tax?

 39.14 (Tax Paid)

TAX Added

TAX Subtracted

Euro Exhange Rate

TAX

 +

TAX

Set the Exchange Rate holding down
         for 3 seconds. Then Enter rate

Then enter the Dollar Amount $100(US)

(Ex. enter rate 1.11) 

Press          Again to set

Press           and the Euro Equivalent is $111

Press           and the US Equivalent is $ 90.09

Hold          3 seconds. enter 1.11

Enter 100. Press

Press           again. Rate is now set
at 1.11

= 111euro

Enter 100. Press

 = 90.09 us

Once Rate is set it will remain 

in memory until changed

Enter the Dollar Amount $100(US)

RE-CAP

HOME

FOREIGN

HOME

FOREIGN

Then press            key again.

www.datexx.com

CARE AND MAINTENANCE

Keep the calculator dry. If it gets wet, wipe it dry before use. 

Do not use harsh solvents or detergents to clean. 

TELEDEX Limited U.S.A. Warranty

TELEDEX INC. warrants these products to the original purchaser to

be free from defective material and workmanship. The product will

be repaired or replaced at our option, for up to one year when

returned with proof of purchase to the address below. Include a

check or money order for $3.00 to cover postage.

TELEDEX INC. 1 Atlas st. Kenilworth, NJ 07033         

Warranty valid only in the U.S.A.

Printed in China  5/01

RATE 

RATE 

RATE 

RATE 

RATE 

RATE 

OPERATING THE CALCULATOR

CAL ON CE/AC key – turns on the calculator. The calculator 

automatically turns off after about 7 minutes 
if no key is pressed. 

  Press CE/AC to clear calculation

Light Batteries

Calculator/Calendar Batteries

1. Turn Calculator Over

2. Remove Screw from
    Smaller Battery cover 

3. Replace Batteries following
    the Polarity Diagram Inside.
  
NOTE: Use  

1.

2.

LR44 or A76

Remove Cover

Turn Over

3.

+

+

Replace

RESET FEATURE

If at any time the Calculator or Clock freezes,
Turn calculator over and located the reset button on back.
Use a unraveled paper clip to push the button.(since the actual 
button in located inside the cover).  It will reset all functions

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