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48 | English
– Mark the centre of the laser line on the upper edge of the door opening as point Ⅳ.
– The discrepancy d between the two marked points Ⅲ and Ⅳ reveals the actual ver-
tical deviation of the measuring tool.
– Measure the height of the door opening.
Repeat the measuring procedure for the second vertical laser line. To do this, switch on
the vertical laser line on the side of the measuring tool and turn the measuring tool 90°
before beginning the measurement.
You can calculate the maximum permitted deviation as follows:
Doubled height of the door opening × 0.3 mm/m
Example: At a door opening height of 2 m, the maximum deviation amounts to
2 × 2 m × ±0.3 mm/m = ±1.2 mm. The points Ⅲ and Ⅳ must therefore be no further
than 1.2 mm from each other.
Working Advice
Only the centre of the laser line must be used for marking. The width of the laser
u
line changes depending on the distance.
Working with the Laser Target Plate (Accessory)
The laser target plate (25) improves visibility of the laser beam in unfavourable condi-
tions and at greater distances.
The reflective surface of the laser target plate (25) improves visibility of the laser line.
The transparent surface enables the laser line to be seen from behind the laser target
plate.
Working with the Tripod (Accessory)
A tripod offers a stable, height-adjustable support surface for measuring. Place the
measuring tool with the 1/4" tripod mount (12) on the thread of the tripod (29) or a con-
ventional camera tripod. Use the 5/8" tripod mount (13) to secure the measuring tool on
1 609 92A 8JB | (08.12.2023)
– Rotate the measuring tool 180° and pos-
ition it on the other side of the door
opening, directly behind point Ⅱ. Allow
the measuring tool to level in and align
the vertical laser line in such a way that
its centre passes through points Ⅰ and Ⅱ
exactly.
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