ELCOM Euro-2100TE, User Manual

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Cash register characteristics
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CALCULATOR FEATURE DESCRIPTION
Implemented functionality
The built-in calculator is able to perform these operations on real numbers:
• addition
• subtraction
• multiplication
• dividing
Maximum precision is 13 valid numbers.
The maximum range overflow (±1,79x10308) error is not handled.
Keyboard operation
You can toggle the calculator functionality of the electronic cash register using the [CALC] key (a special
round button on the top edge of the keyboard).
Individual operations are realised using following keys:
PLU
– addition
DPT – subtraction
MULT – multiplication
MODE – dividing
TOTAL – displays result
CLEAR – initialises the calculator (electronic cash register enters the state before calculator has been
used)
Entering and editing numbers:

...

– enter number

– enter decimal separator

– invert sign (positive sign is not displayed)

– deletes the last entered number
It‘s possible to enter up to 14 digit signed number, including decimal separator. Single sign (i. e. sign entered
without a number) is ignored. The calculator retains the last performed operation and it could be repeated
using the TOTAL key.
Calculator display
After the electronic cash register is switched into calculator mode, the bottom display row shows “Calcula-
tor”.
Entered numbers are shown in the top display row; result is displayed similarly.
The current operation sign (+, -, *, /) is displayed in front of the “Calculator” text in the bottom row.