Checking the Leveling Accuracy of the Vertical Line
For this check, a door opening is required with at least 13 ft of space (on a firm surface) to each side of the door.
–Position the tool on a firm, level surface (not on a tripod) 13 ft away from the door opening. Allow the tool to level in while in
d
7ft
| t |
f | |
13 |
|
13ft
–Position the tool on the other side of the door opening directly behind point II. Allow the tool to level in and align the vertical laser line in such a manner that its center runs exactly through points I and II.
–The difference d between point III and the center of the laser line at the upper edge of the door opening results in the actual deviation of the tool from the
vertical plane.
–Measure the height of the door opening.
–Mark the center of the vertical laser line at the floor of the door opening (point I), at a distance of 26 ft beyond the other side of the door opening (point II) and at the upper edge of the door opening (point III).
The maximum permitted deviation dmax is calculated as follows:
dmax = double height of the door opening x 0.0036 in/ft
Example: With a door opening height of 2 meters, the maximum permitted deviation is dmax = 2 x 7 ft x 0.0036 in/ft = 0.05 in. Thus, the marks must not be more than
0.05 in. apart.
Use with Attachments
Working with the Positioning Device (Accessory) (see figures
The positioning device 17 provides easy ability to properly position the laser line or lines.
It attaches to job site surfaces as follows:
–To tripods with either a
–To steel studs using the magnets on the back
–To drywall or wood walls using screws
–To pipes or similar objects using a commercially available strap (not included)
–To the optional Bosch BP350 Telescoping Pole System 18 for maximum versatility in setting height.
It can also be used a as a mini tripod.
•To attach the laser tool, screw the
•To adjust the height of the laser lines, release the height lock, adjust the height using the adjustment knob and turn the height lock to secure the height.
