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A5 ABSOLUTE MEASUREMENT / RELATIVE MEASUREMENT / DIFFERENTIAL MEASUREMENT
Absolute measurement
(Absolute ZERO) Condition for the absolute measurement is the performing of a reversal measurement
for determining the absolute zero (to the centre of the earth).
After this procedure the instrument will display the effective deviation from the centre of
gravity. This means the value is an absolute angle of the measured surface.
Example: if the object to be measured is absolutely level, the display is "0"
Practical example
Position defined of the vertical
spindle in relation to the machine
table of a machine tool.
Measurement with WYLER-
software MT-SOFT
Relative measurement
(Relative ZERO) A number of measurements do not require the absolute ZERO as described above.
Example: Angular deviation between two objects. (Lines, surfaces, guide ways) The
measurement instrument is placed on an object and the displayed value is
changed to "0". Then the instrument is relocated to a second object and the
displayed value of the angle is the angular difference between the two
surfaces. If the display is also "0", then both surfaces are parallel.
Most important is that always the instrument is placed on both positions in the
same direction.
Practical example
Flatness measurement with
WYLER-software
LEVELSOFT PRO
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