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4.9: Time and Date
DoubleCheck XL offers a built-in clock. The time is announced when the
TIME/DATE key (3 x 3 group, row 1, left key) is pressed. To hear the date, press the
TIME/DATE key long. The Time and Date are also announced in standby mode,
without having to press the ON-key prior to that.
4.10: Memory Function
4.10.1: Save Values
Values can be saved in the memory by a long press of the RCL/STO-key (3 x 3
group, first row, middle key) and a press of a number from 1 to 9. The value is then
saved in the chosen slot. (a letter M is shown on the display).
4.10.2: Select Stored Values
A short press of the RCL/STO-key and a press of a number from 1 to 9 will
recall the memory, which was saved in this slot.
4.10.3: Delete Stored Values
In order to delete a stored value, you save the value „0“ on this slot. (The letter 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, even before the
operation is finished.
4.12: Backlit Display (option)
The light on the backlit version can be turned on or off by pressing the Light-key
(Auxiliary key in row 1).
5: Arithmetic Procedures
DoubleCheck XL offers all standard arithmetic functions, as well as the possibility to
calculate percentages, extract square roots or square a given number.
5.1: Standard Arithmetic Functions
The standard arithmetic functions include: to add, to subtract, to multiply and to
divide. To accomplish one of those standard functions, just type in the number
followed by the function (4 x 4 group, the right column, row 1 to 4) and the second
number. To finish the arithmetic procedure, press the Equals-key (4 x 4 group, row
4, column 3). The Equals-key has a short tactile line.
Note: The memory will be reset when power is removed.
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