Page 71 - Lehrbuch Neigungsmessung deutsch 2018.indd
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COMPENDIUM INCLINATION MEASUREMENT
WYLER AG, WINTERTHUR / SWITZERLAND
Display of a flatness measurement with
correction of the closure error according to
PHILIPS
Remarks regarding closure error correction:
• After finishing a measurement, the display of the grid without correction of the closure error must
be consulted. The closure error is an important indicator of the quality of the measurement and the
measuring uncertainty.
• Normally the closure error should not exceed 20% to 25% of the maximum error.
• Exception: When the maximum error is <4 μm, the percentage of the closure error may be larger.
• In the previously shown example the closure error of 26% (1.07 μm related to 4.03 μm) is still
acceptable because the maximum error is quite small 4.03 μm.
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