ELCOM Euro-2100, Руководство пользователя

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Cash register characteristics
Euro-2100 © Elcom, s. r. o.
18
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 ECR using the [
CALC ] (key (a special
round button on the top edge of the keybo-
ard).
Individual operations are realised using fol-
lowing keys:
PLU – addition
DPT – subtraction
MULT – multiplication
MODE – dividing
TOTAL – displays result
CLEAR – initialises the calculator (ECR
enters the state before calculator has been
used)
Entering and editing numbers:
[ 1...9 ] – enter number
[ PERIOD ] – enter decimal separator
[ EAN ] – invert sign (positive sign is not dis-
played)
[
VOID ] – deletes the last entered number
It‘s possible to enter up to 14 digit signed num-
ber, including decimal separator. Single sign
(i. e. sign entered without a number) is igno-
red. The calculator retains the last performed
operation and it could be repeated using the
TOTAL key.
Calculator display
After the ECR is switched into calculator
mode, the bottom display row shows „Calcu-
lator“.
Entered numbers are shown in the top display
row; result is displayed similarly.
The current operation sign (+, -, *, /) is dis-
played in front of the „Calculator“ text in the
bottom row.
Examples:
16
+
Calculation
Display shows after pressing 16 + 45:
Display shows after pressing TOTAL:
45
+
Calculation
61
+
Calculation
Display shows after pressing TOTAL:
While the ECR is in the calculator mode, the
customer display remains empty.