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5.7
MEASUREMENT OF RIGHT ANGLE OBJECTS (SQUARENESS)
Measurement of 90 degree angles (Squareness) different geometrical objects
Example
Squareness measurement (differential measurement) with two instruments
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2 Measuring instruments connected via Levelmeter 2000 to PC
Object:
90 deg. angle, see arrangement
Step length reference:
125 mm (vertical line)
Step length 2nd line
125 mm (horizontal line)
Number of measurements reference line
4 (vertical)
Number of measurements 2nd line
4 (horizontal)
Base length of the instrument is:
150 mm
Measuring task:
Measurement of 90 degree angles (Squareness) with / or without
previous determination of the instrument’s angular error
General procedure of the measurement
 The existing angular error of the measuring instrument is to determine by using a master granite square
(this is not a must)
 After this the actual measurement is done according to the requirements in different steps as described
below.
After the measurement is done different possibilities exist for the alignment of the reference measurement
(reference line). The result of the measurement displayed will show three possible values depending on the
alignment method chosen:
 Alignment according to the method “Endpoints”
 Alignment according to the method “ISO 1101”
 Alignment according to the method “linear Regression”
The following options
are at your choice
Page 162 of 197 pages