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HomeFAQ Keys & Functions

  • Calculator Keys
  • Calculator Slide Switches

 Power, Cancel  & Correction Keys

  ON/AC

Turns the calculator on if the machine is off. Clears all entries if the machine is on. 

  ON/C

Turns the calculator on if the machine is off. Clears all entries if the machine is on. 

  CE  Used to clear the last entry of a calculation.

ON/C-CE

Turns the calculator on if the machine is off. When on, press once to cancel the last entry,
twice to cancel the whole Entry calculation.
  AC

Clears all entries.

  C/CE  Press once to cancel the last entry, twice to cancel the whole Entry 
  OFF Turns the calculator off
  This Backspace Correction key allows you to backspace/edit the current entry. 
  OFF Turns the calculator off


 COST, SELL, MARGIN Feature

  COST Used to calculate the Cost value, in conjunction with the SELL & MARGIN keys.
  SELL Used to calculate the Sell value, in conjunction with the COST & MARGIN keys.
  MARGIN Used to calculate the Margin value, in conjunction with the COST & SELL  keys.


TAX Feature 

 For more information go to our Calculator Programming page.

 

+ TAX

Press to add tax 
 

- TAX

Press to subtract tax
 

STORE

Used to store the tax rate (see programming guide)
+TAX/C1 Press to add tax or to convert to local currency (see programming guide)
  -TAX/C2 Press to subtract  tax or to convert to foreign currency (see programming guide)
  RATE Used to set or check the tax & currency rates (see programming guide)
  SET Used to set or check the tax rate (see programming guide)


 Currency Conversion

  C1 Press to convert to local currency (see programming guide)
  C2 Press to convert to foreign currency (see programming guide)
  STORE Used to store the currency rate (see programming guide)
+TAX/C1 Press to add tax or to convert to local currency (see programming guide)
  -TAX/C2 Press to subtract  tax or to convert to foreign currency (see programming guide)
  RATE Used to set or check the tax & currency rates (see programming guide)
  SET Used to set or check the tax rate (see programming guide)


Memory Keys

  MC Clears all entries from the memory. 
  M+ Adds the displayed figure into the memory
  M- Subtracts the displayed figure from the memory
MR Recalls the memory total
  MRC Press once to recall the memory total, press again to clear all memory contents 
  MII - Subtracts the displayed figure from the second memory
  MII + Adds the displayed figure into the second memory
  MII RC Press once to recall the second memory total, press again to clear all memory contents

 

 Basic Function Keys

 

-

Minus key
  + Addition key
  % Percentage key
= Equals key. On printing calculators only used for multiplication & division calculations only
  + = Used on printer models, combined minus & equals key. + Plus Equals 
  . Decimal point
  x Multiplication key
  * Used on printer models, this shows the total


 Other Keys

 

Used to display the time & date. Go to our Calculator Programming page for details of how to
set the time and date.

     

MU stands for Mark Up, which is for calculating GROSS PROFIT MARGIN (GPM) used in business
environments.  There are two methods of calculating this, depending on the model of the calculator.
example 1. Enter 100 then press the divide key, then enter 15 then press the MU key, which displays
 117.65 (15% of this total equates to 17.65)
example 2. Enter 100 then press MU key, then enter 15 then press the % key, which displays 117.65
(15% of this total equates to 17.65)

  MU

 

 
     

The Grand Total key is used to show the cumulative total of your calculations (some models need to
have the slide switch set to "GT" to operate.
The Grand Total function automatically cumulates the entries you calculate when pressing the = key
e.g.: enter 6 x 6 = Should display 36 then enter 10+5= Should display 15, if you hit the GT button it will
display the total of these two sums 51.

  GT
     
  00 Enters two zeros when pressed saving time.
  000 Enters three zeros when pressed saving time.
  +/- This changes a positive figure to a negative figure & vice versa 
  #/P Date Print / Print Used on printer models. In non-print mode pressing this button prints what is shown
on the display. In print mode enter the date e.g. 12.1 1.01 & press this button to print.

 


Decimal Point Selector:  Used to set the number of places after the decimal point.

  A Add Mode. Automatically sets the number entered to 2 decimal places e.g. 123 = "1.23", 1 = "0.01"
  0 Automatically sets the answer to no decimal places. e.g. an answer of 1.2345 will show "1"
  1 Automatically sets the answer to 1 decimal place e.g. an answer of 1.2345 will show "1.2"
  2 Automatically sets the answer to 2 decimal places e.g. an answer of 1.2345 will show "1.23"
  3 Automatically sets the answer to 3 decimal places e.g. an answer of 1.2345 will show "1.234"
  4 Automatically sets the answer to 4 decimal places e.g. an answer of 1.2345 will show "1.2345"
F Floating. Automatically sets the answer to the full number of decimal places e.g. an answer of 1.2345
will show "1.2345"


Rounding Selector Used to round up or down the final answer. Used in conjunction with the decimal point selector

  Rounds all decimal values up e.g. When the decimal selector is set to "0" an answer of 1.1 to 1.9
will show as "2"
  Rounds all decimal values down. e.g. When the decimal selector is set to "0" an answer of 1.1 to 1.9
will show as "1"
  5/4 When the decimal selector is set to "0"  all decimal values between 1.5 & 1.9 are rounded up to show
"2" and all decimal values between 1.1 & 1.4 are rounded down to show "1"


Tax & Currency Modes

Tax Setting the slide switch to this position makes the +TAX & - TAX keys active (DT661, DT663, DT665 models)
Currency Setting the slide switch to this position makes the C1 & C2 keys active (DT661, DT663, DT665 models)


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
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