Metrohm tiamo 2.4 Manual - Manual (Page 47)

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2 General program functions
tiamo 2.4
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Entry using the buttons
Mathematical operators and parentheses or brackets can simply be
inserted in the formula using the corresponding buttons. A space is auto-
matically inserted before and after the character.
Addition Equal to Logical AND
Subtraction Greater than Logical OR
Multiplication Less than Round parentheses
Division Not equal to Curly brackets e.g. for endpoint
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 Variables or Operators fields can be added
to the formula by double-clicking or with [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). I.e., 1, 2, 3, 4 are always rounded down whereas 5, 6, 7, 8,
9 are always rounded up.
Examples
2.33 yields 2.3
2.35 yields 2.4
2.47 yields 2.5
–2.38 yields –2.4
–2.45 yields –2.5