Metrohm tiamo 2.3 Manual - Manual (Page 46)

2.4 Formula editor ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
30 ￭￭￭￭￭￭￭￭ tiamo 2.3
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
-2.38 yields -2.4
-2.45 yields -2.5
Statistics
The mean value, absolute and relative standard deviation of results R are
calculated using the following formula: