Johnson Level & Tool Mfg. 40-6690 - Manual (Page 7)

©2012 Johnson Level & Tool - Rev. 1 7
Using the Optional 40-6391 Adjustable Trivet Stand:
1. When a laser is to be set on a flat surface where the laser beam is not centered in the
pipe, use model 40-6391 Trivet Stand.
2. Using this system, the elevation of the laser beam can be set by either measuring down
from a grade offset hub outside the trench or up from the floor of the manhole to the beam.
The pipe laser can be fixed to the 40-6391 adjustable trivet stand as indicated by the
picture below. Loosen the elevating lock knob to adjust the height, loosen the TILT lock
knob to adjust the TILT angle.
Laser Placement with leg sets:
Choose the different size leg sets for different size pipe. (6” or 150mm (no legs), 8” or
200mm, 10” or 250mm, 12” or 300mm, 15” or 400mm, 21” or 500mm).
For 3 feet support of the pipe laser:
Screw the silver adapter to the hole under the handle of the pipe laser. Attach one leg to
the adapter and two legs to the front of the pipe laser as shown in picture.