Metrohm tiamo 2.1 Manual - Manual (Page 38)

2.4 Formula editor ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
24 ￭￭￭￭￭￭￭￭ tiamo 2.1
￭ time
Time indications must always be made with the aid of the Time( ) func-
tion.
Entry using the function buttons
Mathematical operators and parentheses can simply be added to the for-
mula using the corresponding buttons. A space is automatically added
before and after the sign.
Addition Equal to Logic AND
Subtraction Greater than Logic OR
Multiplication Less than Round parentheses
Division Not equal to Curly parentheses e.g. for end-
point definition (example
'DETpH 1.EP{1}.VOL')
Potentiation Less than or equal
to Molar mass calculator
Greater than or
equal to Undo last action
Redo last action
Entry via selection
The element selected in the fields Variables or Operators can be added
to the formula by double clicking or [Insert].
2.4.2 Calculation algorithms
Dialog window: Formula editor
Numerical format
The standard IEEE 754 (1985) for binary floating point arithmetic is imple-
mented in "double precision" (64 Bit) in the software.
Rounding off process
Measured values and results are rounded off symmetrically (commercial
rounding). In so doing, 1, 2, 3, 4 are always rounded down and 5, 6, 7,
8, 9 always rounded up.
Examples
2.33 yields 2.3
2.35 yields 2.4
2.47 yields 2.5